BWXT / BWX Technologies, Inc. - تصريحات هيئة الأوراق المالية والبورصات، التقرير السنوي، بيان الوكيل

etween Robb Alan LeMasters and the Company

Exhibit 10.1 TRANSITION AGREEMENT This Transition Agreement (this “Agreement”) is entered into by and between and shall inure to the benefit of and be binding upon, Robb Alan LeMasters (“Executive”) and BWX Technologies, Inc., a Delaware corporation (the “Company”) (as used herein, the “Company” includes its parents and any subsidiaries, affiliates and related entities), effective as of May 12, 20

BWX Technologies Reports Second Quarter 2025 Results

BWX Technologies Reports Second Quarter 2025 Results •2Q25 revenues of $764.0 million •2Q25 net income of $78.5 million, adjusted EBITDA(1) of $145.9 million •2Q25 diluted GAAP EPS of $0.85, non-GAAP(1) EPS of $1.02 •Closed acquisition of Kinectrics, Inc. on May 20, 2025 •Signed pricing agreement for naval reactors and components; booked over $1.0 billion of $2.6 billion total contract value •Reco

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025. ☐ TRANSITION REPORT P

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 001

Amendment No. 1 to the Amended and Restated Credit Agreement, dated as of May 14, 2025, among BWX Technologies, Inc. and Wells Fargo Bank, National Association, as administrative agent, and the lenders named therein

Execution Version Exhibit 10.2 AMENDMENT NO. 1 TO AMENDED AND RESTATED CREDIT AGREEMENT AMENDMENT NO. 1 TO AMENDED AND RESTATED CREDIT AGREEMENT, dated as of May 14, 2025 (this “Amendment No. 1”), among BWX TECHNOLOGIES, INC., a Delaware corporation (the “Borrower”), WELLS FARGO BANK, NATIONAL ASSOCIATION, as administrative agent (in such capacity, the “Administrative Agent”), the Lenders party he

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2025 BWX TECHNOLOGIES,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2025 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

BWXT Names Mike Fitzgerald Chief Financial Officer

Exhibit 99.1 BWXT Names Mike Fitzgerald Chief Financial Officer (LYNCHBURG, Va. – July 31, 2025) BWX Technologies, Inc. (NYSE: BWXT) announced today that Mike T. Fitzgerald has been named Chief Financial Officer. Fitzgerald served as interim CFO since May 12. “Mike has done an outstanding job stepping in as interim CFO these past months,” said Rex Geveden, BWXT president and chief executive office

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 30, 2025 BWX TECHNOLOGIES, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 30, 2025 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of inc

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 13, 2025 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of inc

BWXT Announces Leadership Changes

BWXT Announces Leadership Changes (LYNCHBURG, Va. – June 16, 2025) BWX Technologies, Inc. (NYSE: BWXT) announced today the appointment of Kevin M. McCoy as the company’s chief nuclear officer. In this role, McCoy will support the Department of Defense and Department of the Navy to accelerate the pace of Columbia and Virginia Class submarine production programs for the U.S. Navy. Since 2022, McCoy

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM SD Specialized Disclosure Report BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) DELAWARE 001-34658 80-0558025 (State of Incorporation or Orga

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM SD Specialized Disclosure Report BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) DELAWARE 001-34658 80-0558025 (State of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification No.) 800 MAIN STREET, 4TH FLOOR LYNCHBURG, VIRGINIA 24504 (Address of Principal Exe

Conflict Minerals Report for the year ended December 31, 202

Exhibit 1.01 BWX Technologies, Inc. Conflict Minerals Report For the Year Ended December 31, 2024 In this Report, unless the context otherwise indicates, "BWXT," "we," "us" and "our" mean BWX Technologies, Inc. and its consolidated subsidiaries. Statements we make in this Conflict Minerals Report (the "Report"), which express a belief, expectation or intention, as well as those that are not histor

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 6, 2025 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of incor

BWXT Announces Chief Financial Officer Transition

Exhibit 99.1 BWXT Announces Chief Financial Officer Transition (Lynchburg, Va. – May 12, 2025) BWX Technologies, Inc. (NYSE: BWXT) today announced that Robb A. LeMasters has stepped down from his position as executive vice president and chief financial officer. The company has named Mike T. Fitzgerald, current chief accounting officer, as the interim chief financial officer. Mr. Fitzgerald joined

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 2, 2025 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of incor

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 2, 2025 BWX TECHNOLOGIES, INC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 2, 2025 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of incor

Form of Performance Restricted Stock Unit Grant for Employees

Exhibit 10.4 FORM OF PERFORMANCE RESTRICTED STOCK UNITS GRANT AGREEMENT To: [] By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the BWX Technologies, Inc. 2020 Omnibus Incentive Plan (the “Plan”), and this Performance Restricted Stock Units Grant Agreement (this “Agreement”), which i

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2025 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of incor

nance Tennessee, Inc. and U.S. Bank Trust Company, National Association, as a Trustee under the Indenture, dated as of April 13, 2021.

Exhibit 10.1 Execution Version SUPPLEMENTAL INDENTURE NO. 2 SUPPLEMENTAL INDENTURE NO. 2 (this “Supplemental Indenture”), dated as of February 10, 2025, among BWX Technologies, Inc. (the “Issuer”), BWXT ORDNANCE TENNESSEE, INC., a Delaware corporation (the “Guaranteeing Subsidiary”), a subsidiary of the Issuer, and U.S. Bank Trust Company, National Association (as successor to U.S. Bank National A

Form of Stock Option Grant for Employees

5 Exhibit 10.3 FORM OF STOCK OPTION GRANT AGREEMENT To: [] By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the BWX Technologies, Inc. 2020 Omnibus Incentive Plan (the “Plan”), and this Stock Option Grant Agreement (this “Agreement”), which is included in the online acceptance proces

Form of Restricted Stock Unit Grant for Employees

Exhibit 10.5 FORM OF RESTRICTED STOCK UNITS GRANT AGREEMENT To: [] By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the BWX Technologies, Inc. 2020 Omnibus Incentive Plan (the “Plan”), and this Restricted Stock Units Grant Agreement (this “Agreement”), which is included in the online

BWX Technologies Reports First Quarter 2025 Results

BWX Technologies Reports First Quarter 2025 Results •1Q25 revenues of $682.3 million •1Q25 net income of $75.5 million, adjusted EBITDA(1) of $129.8 million •1Q25 diluted GAAP EPS of $0.82, non-GAAP(1) EPS of $0.91 •Acquisition of Kinectrics Inc. on track to close in mid-2025 •Land purchase in Oak Ridge, Tennessee to ultimately support the U.S. Department of Energy's National Nuclear Security Admi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025. ☐ TRANSITION REPORT

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 00

nance Tennessee, Inc. and U.S. Bank Trust Company, National Association, as a trustee under the Indenture, dated as of June 12, 2020.

Exhibit 10.2 Execution Version SUPPLEMENTAL INDENTURE NO. 3 SUPPLEMENTAL INDENTURE NO. 3 (this “Supplemental Indenture”), dated as of February 10, 2025, among BWX Technologies, Inc. (the “Issuer”), BWXT ORDNANCE TENNESSEE, INC., a Delaware corporation (the “Guaranteeing Subsidiary”), a subsidiary of the Issuer, and U.S. Bank Trust Company, National Association (as successor to U.S. Bank National A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A Amendment No. 1 (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024. OR ☐ TR

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A Amendment No. 1 (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commissio

Insider Trading Policy

EXHIBIT 19.1 Insider Trading Policy PURPOSE: To express the Company's position on Insider Trading issues, to formalize trading blackouts and pre-clearance obligations, and to identify the responsibilities of affected persons. This policy is intended to assist in preventing situations that could result in legal exposure to individuals and the Company. Compliance with the insider trading laws and th

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6

Subsidiaries of the Registrant.

EXHIBIT 21.1 BWX TECHNOLOGIES, INC. SIGNIFICANT SUBSIDIARIES OF THE REGISTRANT YEAR ENDED DECEMBER 31, 2024 NAME OF COMPANY JURISDICTION OF ORGANIZATION PERCENTAGE OF OWNERSHIP INTEREST BWXT Advanced Technologies LLC Delaware 100 BWXT Canada Holdings Corp. Canada 100 BWXT Canada Ltd. Canada 100 BWXT Commercial Group, Inc. Delaware 100 BWXT Foreign Holdings, LLC Canada 100 BWXT Government Group, In

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant ☐ Check the appropriate box: ý Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 24, 2025 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

Insider Trading Policy

EXHIBIT 19.1 Insider Trading Policy PURPOSE: To express the Company's position on Insider Trading issues, to formalize trading blackouts and pre-clearance obligations, and to identify the responsibilities of affected persons. This policy is intended to assist in preventing situations that could result in legal exposure to individuals and the Company. Compliance with the insider trading laws and th

BWX Technologies Reports Fourth Quarter and Full Year 2024 Results, Initiates 2025 Guidance

BWX Technologies Reports Fourth Quarter and Full Year 2024 Results, Initiates 2025 Guidance •4Q24 diluted GAAP EPS of $0.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024. OR ☐ TRANSITION REPORT PU

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number 001-

Subsidiaries of the Registrant.

EXHIBIT 21.1 BWX TECHNOLOGIES, INC. SIGNIFICANT SUBSIDIARIES OF THE REGISTRANT YEAR ENDED DECEMBER 31, 2024 NAME OF COMPANY JURISDICTION OF ORGANIZATION PERCENTAGE OF OWNERSHIP INTEREST BWXT Advanced Technologies LLC Delaware 100 BWXT Canada Holdings Corp. Canada 100 BWXT Canada Ltd. Canada 100 BWXT Commercial Group, Inc. Delaware 100 BWXT Foreign Holdings, LLC Canada 100 BWXT Government Group, In

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 9, 2025 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of i

BWXT / BWX Technologies, Inc. / WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC - SC 13G/A Passive Investment

SC 13G/A 1 tm2428293d7sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 7)* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CU

JOINT FILING AGREEMENT

EX-99 2 Rule13DJointFilingAgreement.htm JOINT FILING AGREEMENT JOINT FILING AGREEMENT The undersigned hereby agree that this Schedule 13G (the “Schedule 13G”) with respect to the common stock of BWX Technologies, Inc. is, and any additional amendment thereto signed by each of the undersigned shall be, filed on behalf of each undersigned pursuant to and in accordance with the provisions of 13d-1(k)

BWXT / BWX Technologies, Inc. / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5 )* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate bo

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024. ☐ TRANSITION REP

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2024 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

BWX Technologies Reports Third Quarter 2024 Results

BWX Technologies Reports Third Quarter 2024 Results •3Q24 revenues of $672.0 million •3Q24 net income of $69.6 million, adjusted EBITDA(1) of $127.0 million •3Q24 diluted GAAP EPS of $0.76, non-GAAP(1) EPS of $0.83 •Expanding special materials portfolio with announced acquisition of A.O.T., a sole source provider of depleted uranium and finished specialty metals for mission critical defense applic

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 5, 2024 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024. ☐ TRANSITION REPORT P

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 001

BWX Technologies Reports Second Quarter 2024 Results

BWX Technologies Reports Second Quarter 2024 Results •2Q24 revenues of $681.5 million •2Q24 net income of $73.0 million, adjusted EBITDA(1) of $126.2 million •2Q24 diluted GAAP EPS of $0.79, non-GAAP(1) EPS of $0.82 •BWXT-led JV awarded management and operations contract for the NNSA’s Pantex Plant •2024 non-GAAP EPS(1) guidance revised to $3.10-$3.20 Lynchburg, VA – August 5, 2024 - BWX Technolog

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM SD Specialized Disclosure Report BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) DELAWARE 001-34658 80-0558025 (State of Incorporation or Orga

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM SD Specialized Disclosure Report BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) DELAWARE 001-34658 80-0558025 (State of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification No.) 800 MAIN STREET, 4TH FLOOR LYNCHBURG, VIRGINIA 24504 (Address of Principal Exe

Conflict Minerals Report for the year ended December 31, 202

Exhibit 1.01 BWX Technologies, Inc. Conflict Minerals Report For the Year Ended December 31, 2023 In this Report, unless the context otherwise indicates, "BWXT," "we," "us" and "our" mean BWX Technologies, Inc. and its consolidated subsidiaries. Statements we make in this Conflict Minerals Report (the "Report"), which express a belief, expectation or intention, as well as those that are not histor

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 3, 2024 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

BWX Technologies Reports First Quarter 2024 Results

BWX Technologies Reports First Quarter 2024 Results •1Q24 revenues of $604.0 million •1Q24 net income of $68.5 million, adjusted EBITDA(1) of $115.2 million •1Q24 diluted GAAP EPS of $0.75, non-GAAP(1) EPS of $0.76 •Announced expansion of Cambridge manufacturing plant; enhancing capabilities to serve the global CANDU and Small Modular Reactor markets •Reaffirms 2024 non-GAAP EPS(1) guidance of $3.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 6, 2024 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of incor

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024. ☐ TRANSITION REPORT

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 00

Form of 2024 Performance Restricted Stock Units Grant Agreement for Employees (incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2024 (File No. 1-34658)).

EXHIBIT 10.2 FORM OF PERFORMANCE RESTRICTED STOCK UNITS GRANT AGREEMENT To: [] By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the BWX Technologies, Inc. 2020 Omnibus Incentive Plan (the “Plan”), and this Performance Restricted Stock Units Grant Agreement (this “Agreement”), which i

Form of 2024 Stock Option Grant Agreement for Employees (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2024 (File No. 1-34658)).

EXHIBIT 10.1 FORM OF STOCK OPTION GRANT AGREEMENT To: [] By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the BWX Technologies, Inc. 2020 Omnibus Incentive Plan (the “Plan”), and this Stock Option Grant Agreement (this “Agreement”), which is included in the online acceptance process.

Form of 2024 Restricted Stock Units Grant Agreement for Employees (incorporated by reference to Exhibit 10.3 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2024 (File No. 1-34658)).

EXHIBIT 10.3 FORM OF RESTRICTED STOCK UNITS GRANT AGREEMENT To: [] By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the BWX Technologies, Inc. 2020 Omnibus Incentive Plan (the “Plan”), and this Restricted Stock Units Grant Agreement (this “Agreement”), which is included in the online

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6

BWX Technologies, Inc. Clawback Policy

BWX TECHNOLOGIES, INC. POLICY FOR THE RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION 1.Purpose. The purpose of this Policy is to describe the circumstances in which Executive Officers will be required to repay or return Erroneously Awarded Compensation to members of the Company Group. Each Executive Officer shall be required to sign and return to the Company the Acknowledgement Form attached hereto

Subsidiaries of the Registrant.

EXHIBIT 21.1 BWX TECHNOLOGIES, INC. SIGNIFICANT SUBSIDIARIES OF THE REGISTRANT YEAR ENDED DECEMBER 31, 2023 NAME OF COMPANY JURISDICTION OF ORGANIZATION PERCENTAGE OF OWNERSHIP INTEREST BWXT Advanced Technologies LLC Delaware 100 BWXT Canada Holdings Corp. Canada 100 BWXT Canada Ltd. Canada 100 BWXT Commercial Group, Inc. Delaware 100 BWXT Foreign Holdings, LLC Canada 100 BWXT Government Group, In

As Amended and Restated Effective January 1, 2024

BWXT Excess Retirement Savings Plan As Amended and Restated Effective January 1, 2024 ARTICLE I Purpose 1.

First Amendment to the Supplemental Executive Retirement Plan

FIRST AMENDMENT TO THE SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN OF BWX TECHNOLOGIES, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023. OR ☐ TRANSITION REPORT PU

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number 001-

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 27, 2024 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

BWX Technologies Reports Fourth Quarter and Full Year 2023 Results, Initiates 2024 Guidance

BWX Technologies Reports Fourth Quarter and Full Year 2023 Results, Initiates 2024 Guidance •4Q23 diluted GAAP EPS of $0.

BWXT / BWX Technologies, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)* Name of issuer: BWX Technologies Inc Title of Class of Securities: Common Stock CUSIP Number: 05605H100 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

BWXT / BWX Technologies, Inc. / WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC - SC 13G/A Passive Investment

SC 13G/A 1 tm245766d6sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 6)* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUS

BWXT / BWX Technologies, Inc. / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4 )* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box

BWXT Names Nicole W. Piasecki to Board of Directors

BWXT Names Nicole W. Piasecki to Board of Directors (LYNCHBURG, Virginia – January 3, 2024) – BWX Technologies, Inc. (NYSE: BWXT) announced today that Nicole W. Piasecki has been appointed to its board of directors effective January 2, 2024. Piasecki spent 25 years with The Boeing Company in a number of senior leadership positions, including the role of vice president and general manager of the Pr

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 3, 2024 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of i

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023. ☐ TRANSITION REP

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No

BWX Technologies Reports Third Quarter 2023 Results

BWX Technologies Reports Third Quarter 2023 Results •3Q23 revenues of $590.0 million •3Q23 net income of $60.4 million, adjusted EBITDA(1) of $106.5 million •3Q23 diluted GAAP EPS of $0.66, non-GAAP(1) EPS of $0.67 •Multiple agreements signed to progress microreactor development for commercial applications •Narrowing 2023 non-GAAP(1) EPS guidance to $2.90-$2.95 •Preliminary 2024 guidance for non-G

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 1, 2023 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 3, 2023 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023. ☐ TRANSITION REPORT P

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 001

Amended and Restated Bylaws, effective August 2, 2023 (incorporated by reference to Exhibit 3.3 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2023 (File No. 1-34658)).

AMENDED AND RESTATED BYLAWS OF BWX TECHNOLOGIES, INC. TABLE OF CONTENTS Page Article I STOCKHOLDERS 1 Section 1.1 Annual Meetings 1 Section 1.2 Special Meetings 1 Section 1.3 Notice of Meetings 1 Section 1.4 Fixing Date for Determination of Stockholders of Record 2 Section 1.5 List of Stockholders Entitled To Vote 2 Section 1.6 Adjournments 2 Section 1.7 Quorum 3 Section 1.8 Organization 3 Section

BWX Technologies Reports Second Quarter 2023 Results

BWX Technologies Reports Second Quarter 2023 Results •2Q23 revenues of $612.4 million •2Q23 net income of $58.7 million, adjusted EBITDA(1) of $107.0 million •2Q23 diluted GAAP EPS of $0.64, non-GAAP(1) EPS of $0.65 •Selected to provide the nuclear system and fuel for DARPA's DRACO project, the first nuclear powered spacecraft •Shipped final missile tube of the Block II contract from our Mount Ver

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM SD Specialized Disclosure Report BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) DELAWARE 001-34658 80-0558025 (State of Incorporation or Orga

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM SD Specialized Disclosure Report BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) DELAWARE 001-34658 80-0558025 (State of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification No.) 800 MAIN STREET, 4TH FLOOR LYNCHBURG, VIRGINIA 24504 (Address of Principal Exe

Conflict Minerals Report for the year ended December 31, 2022 as required by Items 1.01 and 1.02 of this Form.

Exhibit 1.01 BWX Technologies, Inc. Conflict Minerals Report For the Year Ended December 31, 2022 In this Report, unless the context otherwise indicates, "BWXT," "we," "us" and "our" mean BWX Technologies, Inc. and its consolidated subsidiaries. Statements we make in this Conflict Minerals Report (the "Report"), which express a belief, expectation or intention, as well as those that are not histor

Form of 2023 Performance Restricted Stock Units Grant Agreement for Employees (incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2023 (File No. 1-34658)).

EXHIBIT 10.2 2023 PERFORMANCE RESTRICTED STOCK UNITS GRANT AGREEMENT To: By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the BWX Technologies, Inc. 2020 Omnibus Incentive Plan (the “Plan”), and this 2023 Performance Restricted Stock Units Grant Agreement (this “Agreement”), which is

Form of 2023 Restricted Stock Units Grant Agreement for Employees (incorporated by reference to Exhibit 10.3 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2023 (File No. 1-34658)).

EXHIBIT 10.3 2023 RESTRICTED STOCK UNITS GRANT AGREEMENT To: By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the BWX Technologies, Inc. 2020 Omnibus Incentive Plan (the “Plan”), and this 2023 Restricted Stock Units Grant Agreement (this “Agreement”), which is included in the online

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023. ☐ TRANSITION REPORT

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 00

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 8, 2023 BWX TECHNOLOGIES, INC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 8, 2023 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of incor

BWX Technologies Reports First Quarter 2023 Results

BWX Technologies Reports First Quarter 2023 Results •1Q23 revenue of $568.4 million •1Q23 net income of $61.0 million, adjusted EBITDA(1) of $110.7 million •1Q23 diluted GAAP EPS of $0.67, non-GAAP(1) EPS of $0.70 •Awarded a $428 million, five-year contract by the National Nuclear Security Administration (NNSA) to provide purification and conversion services for highly enriched uranium. •BWXT-led

Form of 2023 Stock Option Grant Agreement for Employees (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2023 (File No. 1-34658)).

EXHIBIT 10.1 2023 STOCK OPTION GRANT AGREEMENT To: By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the BWX Technologies, Inc. 2020 Omnibus Incentive Plan (the “Plan”), and this 2023 Stock Option Grant Agreement (this “Agreement”), which is included in the online acceptance process.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2023 BWX TECHNOLOGIES, INC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2023 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of incor

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

DEFA14A 1 a2023defa14aproxydefinitiv.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use o

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022. OR ☐ TRANSITION REPORT PU

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number 001-

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 23, 2023 BWX TECHNOLOGIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 23, 2023 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

Subsidiaries of the Registrant.

EXHIBIT 21.1 BWX TECHNOLOGIES, INC. SIGNIFICANT SUBSIDIARIES OF THE REGISTRANT YEAR ENDED DECEMBER 31, 2022 NAME OF COMPANY JURISDICTION OF ORGANIZATION PERCENTAGE OF OWNERSHIP INTEREST BWXT Advanced Technologies LLC Delaware 100 BWXT Canada Holdings Corp. Canada 100 BWXT Canada Ltd. Canada 100 BWXT Commercial Group, Inc. Delaware 100 BWXT Foreign Holdings, LLC Canada 100 BWXT Government Group, In

Transition Agreement, dated December 29, 2022, between Thomas E. McCabe and the Company (incorporated by reference to Exhibit 10.30 to the Company's Annual Report on Form 10-K for the year ended December 31, 2022 (File No. 1-34658)).

EXHIBIT 10.30 TRANSITION AGREEMENT This Transition Agreement (this “Agreement”) is entered into by and between, and shall inure to the benefit of and be binding upon, Thomas E. McCabe (“Executive”) and BWX Technologies, Inc., a Delaware corporation (the “Company”), effective as of December 29, 2022 (the “Effective Date”). RECITALS: A. Executive desires to retire from his employment with the Compan

BWX Technologies Reports Fourth-Quarter and Full-Year 2022 Results, Initiates 2023 Guidance and Increases Quarterly Cash Dividend

BWX Technologies Reports Fourth-Quarter and Full-Year 2022 Results, Initiates 2023 Guidance and Increases Quarterly Cash Dividend •4Q22 diluted GAAP EPS of $0.

BWXT / BWX Technologies Inc / Boston Partners - ROBECO INVESTMENT MANAGEMENT INC. Passive Investment

SC 13G/A 1 bwxta121323.htm ROBECO INVESTMENT MANAGEMENT INC. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* BWX TECHNOLOGIES INC (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) December 31, 2022 (Date of Event which Requires Filing of this Statement) Check the ap

BWXT / BWX Technologies Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 10)* Name of issuer: BWX Technologies Inc. Title of Class of Securities: Common Stock CUSIP Number: 05605H100 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Schedule is filed

BWXT / BWX Technologies Inc / WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC - SC 13G/A Passive Investment

SC 13G/A 1 tm23584d2sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 5)* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSI

BWXT / BWX Technologies Inc / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3 )* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 29, 2022 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

BWXT Promotes Chip Whitford to Senior Vice President and General Counsel

BWXT Promotes Chip Whitford to Senior Vice President and General Counsel (LYNCHBURG, Va.

Transition Agreement, dated August 19, 2022, between Richard W. Loving and the Company (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2022 (File No. 1-34658)).

EXHIBIT 10.3 TRANSITION AGREEMENT This Transition Agreement (this ?Agreement?) is entered into by and between, and shall inure to the benefit of and be binding upon, Richard W. Loving (?Executive?) and BWX Technologies, Inc., a Delaware corporation (the ?Company?), effective as of August 19, 2022 (the ?Effective Date?). RECITALS: A. Executive desires to retire from his employment with the Company

Non-Competition and Non-Solicitation Agreement, dated July 15, 2022, between Joel W. Duling and the Company (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2022 (File No. 1-34658)).

Exhibit 10.2 TUITION REIMBURSEMENT, COVENANT NOT TO COMPETE, CONFIDENTIALITY AND NON-DISCLOSURE AGREEMENT The following Tuition Reimbursement, Covenant Not to Compete, Confidentiality and Non-Disclosure Agreement (the ?Agreement?) is made and entered into as of July 15, 2022, by and between Joel W. Duling (?Duling?) and BWX Technologies, Inc., including its subsidiaries and affiliates (?BWXT? or t

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022. ☐ TRANSITION REP

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022. OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 7, 2022 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

BWX Technologies Reports Third Quarter 2022 Results

BWX Technologies Reports Third Quarter 2022 Results ?3Q22 revenue of $523.7 million ?3Q22 net income of $61.8 million, adjusted EBITDA(1) of $100.1 million ?3Q22 diluted GAAP EPS of $0.67, non-GAAP(1) EPS of $0.69 ?3Q22 net cash provided by operating activities of $65.0 million, free cash flow(1) of $25.4 million ?Narrows 2022 guidance and anticipates strong revenue and EBITDA(1) growth in 2023 ?T

Amended and Restated Credit Agreement, dated as of October 12, 2022, among BWX Technologies, Inc. as borrower, Wells Fargo Bank, National Association, as administrative agent and the other lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed with the SEC on October 12, 2022 (File No. 1-34658)).

Exhibit 10.1 EXECUTION VERSION AMENDED AND RESTATED CREDIT AGREEMENT dated as of October 12, 2022, among BWX TECHNOLOGIES, INC., as the Borrower, WELLS FARGO BANK, NATIONAL ASSOCIATION, as Administrative Agent, Swing Line Lender and an L/C Issuer, and The Other Lenders Party Hereto WELLS FARGO SECURITIES, LLC, JPMORGAN CHASE BANK, N.A., PNC CAPITAL MARKETS LLC, TD SECURITIES (USA) LLC, TRUIST BANK

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 12, 2022 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

BWXT Closes Amended and Restated Credit Agreement

Exhibit 99.1 BWXT Closes Amended and Restated Credit Agreement (LYNCHBURG, Va. ? Oct. 12, 2022) ? BWX Technologies, Inc. (NYSE: BWXT) announced today that it has closed on an amended and restated credit agreement with Wells Fargo Bank, N.A. and other lenders that increases the company?s liquidity while improving a number of key terms for BWXT. The amended and restated credit agreement, among other

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 21, 2022 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer o

BWXT Names Robert Duffy as Chief Administrative Officer

BWXT Names Robert Duffy as Chief Administrative Officer (LYNCHBURG, Va. ? August 22, 2022) ? BWX Technologies, Inc. (NYSE: BWXT) has appointed Robert (Bob) Duffy as senior vice president and chief administrative officer (CAO). In this role, he will have full responsibility for human resources and a number of other business support functions. ?Bob has an extraordinary track record of leading and bu

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 19, 2022 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of i

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022. ☐ TRANSITION REPORT P

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022. OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 001

BWX Technologies Reports Robust Second Quarter 2022 Results; Increases 2022 Revenue and Adjusted EBITDA(1) Guidance

BWX Technologies Reports Robust Second Quarter 2022 Results; Increases 2022 Revenue and Adjusted EBITDA(1) Guidance ?2Q22 revenue of $554 million, up 10% ?2Q22 GAAP and non-GAAP(1) EPS of $0.

Supplemental Indenture No. 2, dated as of May 25, 2022, between Citadel Capital Corporation, Cunico Corporation and U.S. Bank Trust Company, National Association, as Trustee under the indenture, dated as of April 13, 2021 (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2022 (File No. 1-34658)).

SUPPLEMENTAL INDENTURE SUPPLEMENTAL INDENTURE (this ?Supplemental Indenture?), dated as of May 25, 2022, among BWX Technologies, Inc.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2022 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

Supplemental Indenture No. 2, dated as of May 25, 2022, between Citadel Capital Corporation, Cunico Corporation and U.S. Bank Trust Company, National Association, as Trustee under the indenture, dated as of June 12, 2020 (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2022 (File No. 1-34658)).

SUPPLEMENTAL INDENTURE NO. 2 SUPPLEMENTAL INDENTURE NO. 2 (this ?Supplemental Indenture?), dated as of May 25, 2022, among BWX Technologies, Inc. (the ?Issuer?), Citadel Capital Corporation (?Citadel?) and CUNICO CORPORATION (?Cunico?, together with Citadel, the ?Guaranteeing Subsidiaries?, and each a ?Guaranteeing Subsidiary?), each a subsidiary of the Issuer, and U.S. Bank Trust Company, Nationa

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 12, 2022 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of inc

Conflict Minerals Report for the year ended December 31, 2021 as required by Items 1.01 and 1.02 of this Form.

Exhibit 1.01 BWX Technologies, Inc. Conflict Minerals Report For the Year Ended December 31, 2021 In this Report, unless the context otherwise indicates, "BWXT," "we," "us" and "our" mean BWX Technologies, Inc. and its consolidated subsidiaries. Statements we make in this Conflict Minerals Report (the "Report"), which express a belief, expectation or intention, as well as those that are not histor

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM SD Specialized Disclosure Report BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) DELAWARE 001-34658 80-0558025 (State of Incorporation or Orga

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM SD Specialized Disclosure Report BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) DELAWARE 001-34658 80-0558025 (State of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification No.) 800 MAIN STREET, 4TH FLOOR LYNCHBURG, VIRGINIA 24504 (Address of Principal Exe

Form of 2022 Restricted Stock Unit Grant Agreement for Employees (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2022 (File No. 1-34658)).

2022 RESTRICTED STOCK UNITS GRANT AGREEMENT To: By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the BWX Technologies, Inc.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 9, 2022 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of incor

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022. ☐ TRANSITION REPORT

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022. OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 00

BWX Technologies Reports First Quarter 2022 Results

BWX Technologies Reports First Quarter 2022 Results ?Generates 1Q22 GAAP earnings of $0.

Form of 2022 Performance Restricted Stock Unit Grant Agreement for Employees (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2022 (File No. 1-34658)).

2022 PERFORMANCE RESTRICTED STOCK UNITS GRANT AGREEMENT To: By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the BWX Technologies, Inc.

Financial Statements and Exhibits, Other Events, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 3, 2022 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of incor

BWXT Appoints Jan A. Bertsch as New Chair of Board of Directors

Exhibit 99.1 BWXT Appoints Jan A. Bertsch as New Chair of Board of Directors (LYNCHBURG, Va. ? May 3, 2022) ? BWX Technologies, Inc. (NYSE: BWXT) announced today that Jan A. Bertsch has been elected as its new chair of the board of directors, effective May 3, 2022, succeeding retiring board chairman John A. Fees. Bertsch has served as an independent director of BWXT since 2013, and she was most re

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

DEFA14A 1 a2022defa14aproxydefinitiv.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use o

Transition Agreement, dated November 4, 2021, between David S. Black and the Company (incorporated by reference to Exhibit 10.29 to the Company's Annual Report on Form 10-K for the year ended December 31, 2021 (File No. 1-34658)).

EXHIBIT 10.36 TRANSITION AGREEMENT This Transition Agreement (this ?Agreement?) is entered into by and between, and shall inure to the benefit of and be binding upon, David Scott Black (?Executive?) and BWX Technologies, Inc., a Delaware corporation (the ?Company?) effective as of November 4, 2021 (the ?Effective Date?). RECITALS: A. Executive desires to retire from his employment with the Company

BWX Technologies Reports Fourth Quarter and Full-Year 2021 Results

BWX Technologies Reports Fourth Quarter and Full-Year 2021 Results ?Generates 4Q21 EPS of $1.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 22, 2022 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

Subsidiaries of the Registrant.

EX-21.1 3 exhibit211123121x10k.htm EX-21.1 EXHIBIT 21.1 BWX TECHNOLOGIES, INC. SIGNIFICANT SUBSIDIARIES OF THE REGISTRANT YEAR ENDED DECEMBER 31, 2021 NAME OF COMPANY JURISDICTION OF ORGANIZATION PERCENTAGE OF OWNERSHIP INTEREST BWXT Investment Company Delaware 100 BWXT Canada Ltd. Canada 100 BWXT Government Group, Inc. Delaware 100 BWXT Nuclear Operations Group, Inc. Delaware 100 BWXT Nuclear Ene

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021. OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number 001-

BWXT / BWX Technologies Inc / Boston Partners - ROBECO INVESTMENT MANAGEMENT INC. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 BWX TECHNOLOGIES INC (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) December 31, 2021 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [X

BWXT / BWX Technologies Inc / WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO ? 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO ? 240.13d-2 (Amendment No. 4)* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) December 31, 2021 (Date of Eve

BWXT / BWX Technologies Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 9)* Name of issuer: BWX Technologies Inc. Title of Class of Securities: Common Stock CUSIP Number: 05605H100 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

BWXT / BWX Technologies Inc / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

BWXT / BWX Technologies Inc / Capital International Investors - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2021 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

BWXT Names Robb A. LeMasters as Next Chief Financial Officer Current CFO David Black to Retire After 30 Years at BWXT and Serve as Special Advisor to CEO

Exhibit 99.1 BWXT Names Robb A. LeMasters as Next Chief Financial Officer Current CFO David Black to Retire After 30 Years at BWXT and Serve as Special Advisor to CEO (LYNCHBURG, Va. ? November 5, 2021) ? BWX Technologies, Inc. (NYSE: BWXT) announced today that as part of BWXT?s executive succession planning process, Robb A. LeMasters has been named senior vice president and chief financial office

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 1, 2021 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021. ☐ TRANSITION REP

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021. OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No

BWX Technologies Reports Third Quarter 2021 Results, Narrows 2021 Guidance and Strategically Deploys Capital to Repurchase Shares

BWX Technologies Reports Third Quarter 2021 Results, Narrows 2021 Guidance and Strategically Deploys Capital to Repurchase Shares ?Generates 3Q21 earnings per share of $0.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 20, 2021 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

Form of 2021 Performance Restricted Stock Unit Grant Agreement for Employees (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2021 (File No. 1-34658)).

2021 PERFORMANCE RESTRICTED STOCK UNITS GRANT AGREEMENT To: By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the BWX Technologies, Inc.

BWX Technologies Reports Second Quarter 2021 Results and Continues Progress On Future Growth Milestones

BWX Technologies Reports Second Quarter 2021 Results and Continues Progress On Future Growth Milestones ?Generates 2Q21 earnings of $0.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021. ☐ TRANSITION REPORT P

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021. OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 001

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 2, 2021 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

Form of 2021 Restricted Stock Unit Grant Agreement for Employees (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2021 (File No. 1-34658)).

2021 RESTRICTED STOCK UNITS GRANT AGREEMENT To: By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the BWX Technologies, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM SD Specialized Disclosure Report BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) DELAWARE 001-34658 80-0558025 (State of Incorporation or Orga

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM SD Specialized Disclosure Report BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) DELAWARE 001-34658 80-0558025 (State of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification No.) 800 MAIN STREET, 4TH FLOOR LYNCHBURG, VIRGINIA 24504 (Address of Principal Exe

Conflict Minerals Report for the year ended December 31, 2020 as required by Items 1.01 and 1.02 of this Form.

Exhibit 1.01 BWX Technologies, Inc. Conflict Minerals Report For the Year Ended December 31, 2020 In this Report, unless the context otherwise indicates, "BWXT," "we," "us" and "our" mean BWX Technologies, Inc. and its consolidated subsidiaries. Statements we make in this Conflict Minerals Report (the "Report"), which express a belief, expectation or intention, as well as those that are not histor

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 30, 2021 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 3, 2021 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of incor

BWX Technologies Reports First Quarter 2021 Results and Commences New Multi-Year Guidance Framework

BWX Technologies Reports First Quarter 2021 Results and Commences New Multi-Year Guidance Framework ?Generates 1Q21 earnings of $0.

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021. OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 00

BWX Technologies Announces the Closing of its Senior Notes Offering

Exhibit 99.1 BWX Technologies Announces the Closing of its Senior Notes Offering (LYNCHBURG, Virginia ? April 13, 2021) - BWX Technologies, Inc. (NYSE: BWXT) (?BWXT?) announced today the closing of its previously announced offering of $400 million aggregate principal amount of 4.125% senior notes due 2029 (the ?Notes?) in a private transaction exempt from the registration requirements of the Secur

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 13, 2021 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

Indenture, dated April 13, 2021, among BWX Technologies, Inc., each of the guarantors party thereto and U.S. Bank Trust Company, National Association, as trustee (incorporated by reference to Exhibit 4.1 to the Company's Current Report on Form 8-K filed with the SEC on April 13, 2021 (File No. 1-34658)).

Exhibit 4.1 BWX TECHNOLOGIES, INC. as Issuer THE GUARANTORS NAMED HEREIN and U.S. BANK NATIONAL ASSOCIATION as Trustee, Paying Agent and Note Registrar INDENTURE Dated as of April 13, 2021 $400,000,000 4.125% Senior Notes due 2029 Table of Contents ARTICLE One DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION SECTION 101. Rules of Construction 1 SECTION 102. Definitions 2 SECTION 103. Compli

BWX Technologies Announces Proposed $400 Million Senior Notes Offering

Exhibit 99.2 BWX Technologies Announces Proposed $400 Million Senior Notes Offering (LYNCHBURG, Virginia ? March 29, 2021) - BWX Technologies, Inc. (NYSE: BWXT) (?BWXT?) announced today that it plans to offer up to $400 million aggregate principal amount of senior notes due 2029 (the ?Notes?) in a private transaction exempt from the registration requirements of the Securities Act of 1933, as amend

BWX Technologies Announces Pricing of Senior Notes Offering

Exhibit 99.1 BWX Technologies Announces Pricing of Senior Notes Offering (LYNCHBURG, Virginia ? March 29, 2021) - BWX Technologies, Inc. (NYSE: BWXT) (?BWXT?) announced today that it has priced its previously announced offering of $400 million aggregate principal amount of 4.125% senior notes due 2029 (the ?Notes?) in a private transaction exempt from the registration requirements of the Securitie

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 29, 2021 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

SUMMARY FINANCIAL DATA

Exhibit 99.1 SUMMARY FINANCIAL DATA The following table sets forth our summary financial data as of the dates and for the periods indicated. We have derived the summary financial data for the fiscal years ended December 31, 2020, 2019 and 2018 from our audited consolidated financial statements, which are included in our Annual Report on Form 10-K for the year ended December 31, 2020, which is inco

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 29, 2021 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

- DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant Check the appropriate box: Preliminary Proxy Statement Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)

- DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6

BWX Technologies Reports Solid Fourth Quarter 2020 Results, Marking New Annual Records for Revenue and Earnings and Achieves Long-Term Guidance

BWX Technologies Reports Solid Fourth Quarter 2020 Results, Marking New Annual Records for Revenue and Earnings and Achieves Long-Term Guidance •Generates 4Q20 EPS of $0.

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020. OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number 001-

Subsidiaries of the Registrant.

EXHIBIT 21.1 BWX TECHNOLOGIES, INC. SIGNIFICANT SUBSIDIARIES OF THE REGISTRANT YEAR ENDED DECEMBER 31, 2020 NAME OF COMPANY JURISDICTION OF ORGANIZATION PERCENTAGE OF OWNERSHIP INTEREST BWXT Investment Company Delaware 100 BWXT Canada Ltd. Canada 100 BWXT Government Group, Inc. Delaware 100 BWXT Nuclear Operations Group, Inc. Delaware 100 BWXT Nuclear Energy, Inc. Delaware 100 Nuclear Fuel Service

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 22, 2021 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3 )* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendme

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 3)* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) 12/31/2020 (Date of Event Whic

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) January 29, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)* Name of issuer: BWX Technologies Inc. Title of Class of Securities: Common Stock CUSIP Number: 05605H100 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

BWXT Names Former Chief of Naval Operations Adm. John M. Richardson to Board of Directors

Exhibit 99.1 BWXT Names Former Chief of Naval Operations Adm. John M. Richardson to Board of Directors (LYNCHBURG, Va. – December 17, 2020) – BWX Technologies, Inc. (NYSE: BWXT) announced today that retired Adm. John M. Richardson has been appointed to its board of directors. Adm. Richardson served as the Chief of Naval Operations for the U.S. Navy from 2015 to 2019 and as Director of the Naval Nu

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 16, 2020 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 2, 2020 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No

BWX Technologies Reports Solid Third Quarter 2020 Results; Increases 2020 Full-Year Earnings Guidance Once Again

BWX Technologies Reports Solid Third Quarter 2020 Results; Increases 2020 Full-Year Earnings Guidance Once Again •Generates 3Q20 GAAP EPS of $0.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 3, 2020 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

Form of Restricted Stock Unit Grant Agreement for Non-Employee Directors (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2020 (File No. 1-34658)).

, 20 PERSONAL & CONFIDENTIAL [NAME] Board of Directors BWX Technologies, Inc. RE: Director Equity Grant Dear : In accordance with the Non-Employee Director Compensation Program approved by the Board of Directors of BWX Technologies, Inc. (“BWXT”), you received a grant (the “Grant”) of Restricted Stock Units (“RSUs”) under the 2020 Omnibus Incentive Plan of BWXT (approved by shareholders effective

BWX Technologies Reports Strong Second Quarter 2020 Results and Increases 2020 Full-Year Earnings Guidance

BWX Technologies Reports Strong Second Quarter 2020 Results and Increases 2020 Full-Year Earnings Guidance •Grows 2Q20 EPS to $0.

Joinder Agreement, dated as of July 9, 2020, between BWXT Mt. Athos, LLC and Wells Fargo Bank, N.A., as Administrative Agent (incorporated by reference to Exhibit 10.4 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2020 (File No. 1-34658)).

JOINDER AGREEMENT This JOINDER AGREEMENT (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, this “Agreement”) dated as of July 9, 2020 between BWXT MT.

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 001

Joinder Agreement, dated as of February 13, 2020, between Laker Energy Products Ltd. and Wells Fargo Bank, N.A., as Administrative Agent (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2020 (File No. 1-34658)).

JOINDER AGREEMENT This JOINDER AGREEMENT (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, this “Agreement”) dated as of February 13, 2020 between LAKER ENERGY PRODUCTS LTD.

Indenture, dated June 12, 2020, among BWX Technologies, Inc., each of the guarantors party thereto and U.S. Bank Trust Company, National Association, as trustee (incorporated by reference to Exhibit 4.1 to the Company's Current Report on Form 8-K filed with the SEC on June 12, 2020 (File No. 1-34658)).

Exhibit 4.1 BWX TECHNOLOGIES, INC. as Issuer THE GUARANTORS NAMED HEREIN and U.S. BANK NATIONAL ASSOCIATION as Trustee, Paying Agent and Note Registrar INDENTURE Dated as of June 12, 2020 $400,000,000 4.125% Senior Notes due 2028 Reconciliation and tie between Trust Indenture Act of 1939 and Indenture, dated as of June 12, 2020 Trust Indenture Act Section Indenture Section §310 (a)(1) 608 (a)(2) N

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 12, 2020 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of inc

BWX Technologies Announces the Closing of its Senior Notes Offering

Exhibit 99.1 BWX Technologies Announces the Closing of its Senior Notes Offering (LYNCHBURG, Virginia - June 12, 2020) - BWX Technologies, Inc. (NYSE:BWXT) (“BWXT”) announced today the closing of its previously announced offering of $400 million aggregate principal amount of 4.125% senior notes due 2028 (the “Notes”) in a private transaction exempt from the registration requirements of the Securit

BWX Technologies Announces Pricing of Senior Notes Offering

Exhibit 99.1 BWX Technologies Announces Pricing of Senior Notes Offering (LYNCHBURG, Virginia - June 9, 2020) - BWX Technologies, Inc. (NYSE:BWXT) (“BWXT”) announced today that it has priced its previously announced offering of $400 million aggregate principal amount of 4.125% senior notes due 2028 (the “Notes”) in a private transaction exempt from the registration requirements of the Securities A

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 9, 2020 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of inco

BWX Technologies Announces Proposed $400 Million Senior Notes Offering

Exhibit 99.2 BWX Technologies Announces Proposed $400 Million Senior Notes Offering (LYNCHBURG, Virginia – June 9, 2020) - BWX Technologies, Inc. (NYSE:BWXT) (“BWXT”) announced today that it plans to offer up to $400 million aggregate principal amount of senior notes due 2028 (the “Notes”) in a private transaction exempt from the registration requirements of the Securities Act of 1933, as amended

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 9, 2020 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of inco

Excerpts from the Preliminary Offering Memorandum of BWX Technologies, Inc., dated June 9, 2020 RECENT DEVELOPMENTS

Exhibit 99.1 Excerpts from the Preliminary Offering Memorandum of BWX Technologies, Inc., dated June 9, 2020 RECENT DEVELOPMENTS COVID-19 Assessment A global outbreak of a novel strain of coronavirus (“COVID-19”) has occurred impacting over 200 countries, including the U.S. and Canada where we maintain our principal operations. Developments have been occurring rapidly with respect to the spread of

-

Via EDGAR June 5, 2020 U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, NE Washington, D.C. 20549 Attn: Robert S. Littlepage Accountant Branch Chief Re: BWX Technologies, Inc. Form 10-K for Fiscal Year Ended December 31, 2019 Filed February 24, 2020 File No. 001-34658 Dear Mr. Littlepage: This letter sets forth the responses of BWX Technologies, Inc. (together

- SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM SD Specialized Disclosure Report BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) DELAWARE 001-34658 80-0558025 (State of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification No.) 800 MAIN STREET, 4TH FLOOR LYNCHBURG, VIRGINIA 24504 (Address of Principal Exe

Conflict Minerals Report for the year ended December 31, 2019 as required by Items 1.01 and 1.02 of this Form.

Exhibit 1.01 BWX Technologies, Inc. Conflict Minerals Report For the Year Ended December 31, 2019 In this Report, unless the context otherwise indicates, "BWXT," "we," "us" and "our" mean BWX Technologies, Inc. and its consolidated subsidiaries. Statements we make in this Conflict Minerals Report ("Report"), which express a belief, expectation or intention, as well as those that are not historical

- S-8

As filed with the Securities and Exchange Commission on May 6, 2020 Registration No.

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2020 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of inc

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2020 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of incor

Form of 2020 Restricted Stock Unit Grant Agreement for Employees (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2020 (File No. 1-34658)).

2020 RESTRICTED STOCK UNITS GRANT AGREEMENT To: By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the 2010 Long-Term Incentive Plan of BWX Technologies, Inc.

BWX Technologies Reports Record First Quarter 2020 Results

BWX Technologies Reports Record First Quarter 2020 Results • Generates record earnings with 1Q20 EPS of $0.

Form of 2020 Performance Restricted Stock Unit Grant Agreement for Employees (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2020 (File No. 1-34658)).

2020 PERFORMANCE RESTRICTED STOCK UNITS GRANT AGREEMENT To: By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the 2010 Long-Term Incentive Plan of BWX Technologies, Inc.

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 00

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 4, 2020 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of incor

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 20, 2020 BWX TECHNOLOGIES,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 20, 2020 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

BWXT Names Robb A. LeMasters to New Position of Chief Strategy Officer

Exhibit 99.1 BWXT Names Robb A. LeMasters to New Position of Chief Strategy Officer (LYNCHBURG, Va. - April 20, 2020) - BWX Technologies, Inc. (NYSE: BWXT) today announced that Robb A. LeMasters has been appointed senior vice president and chief strategy officer, effective July 13, 2020. In this new role, LeMasters will be responsible for driving BWXT’s overall corporate strategy for growth in its

BWTX / Bakken Water Transfer Services Inc. DEFA14A - - DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 20, 2020 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

Press Release dated April 20, 2020.

Exhibit 99.1 BWXT Names Robb A. LeMasters to New Position of Chief Strategy Officer (LYNCHBURG, Va. - April 20, 2020) - BWX Technologies, Inc. (NYSE: BWXT) today announced that Robb A. LeMasters has been appointed senior vice president and chief strategy officer, effective July 13, 2020. In this new role, LeMasters will be responsible for driving BWXT’s overall corporate strategy for growth in its

BWTX / Bakken Water Transfer Services Inc. DEFA14A - - DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6

BWXT / BWX Technologies, Inc. / BROWN ADVISORY INC - BROWN ADVISORY INCORPORATED Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* BWX Technologies, Inc. (Name of Issuer) (Title of Class of Securities) 05605H100 (CUSIP Number) March 31, 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is file

BWXT Announces Amendment to Credit Agreement

Exhibit 99.1 BWXT Announces Amendment to Credit Agreement (LYNCHBURG, Va. – March 25, 2020) – BWX Technologies, Inc. (NYSE: BWXT) (“BWXT”) announced today that it has entered into an amendment to its May 24, 2018 credit agreement with Wells Fargo Bank, N.A. and other lenders that increases its borrowing capacity while delivering lower rates for the company. The amendment announced today provides,

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 24, 2020 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

Amendment No. 1 to Credit Agreement, dated as of March 24, 2020, among BWX Technologies, Inc. as administrative borrower, BWXT Canada Ltd., as the Canadian borrower, Wells Fargo Bank, N.A., as administrative borrower and the other lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed with the SEC on March 25, 2020 (File No. 1-34658)).

Exhibit 10.1 Execution Version AMENDMENT NO. 1 TO CREDIT AGREEMENT Amendment NO. 1 TO CREDIT AGREEMENT, dated as of March 24, 2020 (this “Amendment No. 1”), among BWX TECHNOLOGIES, INC., a Delaware corporation (the “Administrative Borrower”), BWXT Canada Ltd., an Ontario corporation (the “Canadian Borrower” and together with the Administrative Borrower, collectively, the “Borrower” and each, a “Bo

BWX Technologies, Inc. 2020 Omnibus Incentive plan (incorporated by reference to Appendix B to the Company's Proxy Statement, dated March 17, 2020 (File No. 1-34658)).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant Check the appropriate box: Preliminary Proxy Statement Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)

BWX Technologies Reports Strong Fourth Quarter 2019 Results, Setting New Year-End Highs for Revenue, Earnings and Backlog

BWX Technologies Reports Strong Fourth Quarter 2019 Results, Setting New Year-End Highs for Revenue, Earnings and Backlog • 4Q19 GAAP EPS of $0.

Subsidiaries of the Registrant.

EXHIBIT 21.1 BWX TECHNOLOGIES, INC. SIGNIFICANT SUBSIDIARIES OF THE REGISTRANT YEAR ENDED DECEMBER 31, 2019 NAME OF COMPANY JURISDICTION OF ORGANIZATION PERCENTAGE OF OWNERSHIP INTEREST BWXT Investment Company Delaware 100 BWXT Canada Ltd. Canada 100 BWXT Government Group, Inc. Delaware 100 BWXT Nuclear Operations Group, Inc. Delaware 100 BWXT Nuclear Energy, Inc. Delaware 100 Nuclear Fuel Service

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 24, 2020 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number 001-

Description of the Company's Securities Registered under Section 12 of the Securities Exchange Act of 1934 (incorporated by reference to Exhibit 4.4 to the Company's Annual Report on Form 10-K filed with the SEC on February 24, 2020 (File No. 1-34658)).

EXHIBIT 4.4 DESCRIPTION OF BWX TECHNOLOGIES, INC. SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 General BWX Technologies, Inc., a Delaware corporation (the “Company,” “we” or “us”), is authorized to issue two classes of securities: (i) up to 325,000,000 shares of common stock, par value of $0.01 per share, and (ii) up to 75,000,000 shares of preferred stock, p

BWXT / BWX Technologies, Inc. / BROWN ADVISORY INC - BROWN ADVISORY INCORPORATED Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* BWX TECHNOLOGIES, INC. (Name of Issuer) (Title of Class of Securities) 05605H100 (CUSIP Number) December 31, 2019 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is f

BWXT / BWX Technologies, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 7)* Name of issuer: BWX Technologies Inc Title of Class of Securities: Common Stock CUSIP Number: 05605H100 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

BWXT / BWX Technologies, Inc. / WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 2)* BWX Technologies, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) 12/31/2019 (Date of Event Whic

BWXT / BWX Technologies, Inc. / Wellington Management Group LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* BWX Technologies Inc (Name of Issuer) Common Stock (Title of Class of Securities) 05605H100 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sch

JOINT FILING AGREEMENT

Exhibit 1 JOINT FILING AGREEMENT This Joint Filing Agreement, entered into and effective as of the date first set forth below, is made by and between BWX Technologies, Inc.

LEU / Centrus Energy Corp. / Babcock & Wilcox Co - SC 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c), and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 Under the Securities Exchange Act of 1934 (Amendment No. 1)* Centrus Energy Corp. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 15643U104 (CUSIP Numbe

BWXT / BWX Technologies, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 6)* Name of issuer: BWX Technologies Inc Title of Class of Securities: Common Stock CUSIP Number: 05605H100 Date of Event Which Requires Filing of this Statement: November 29, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2019 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of

BWX Technologies Reports Record Third Quarter 2019 Results; Increases Full-Year 2019 Non-GAAP EPS Guidance

BWX Technologies Reports Record Third Quarter 2019 Results; Increases Full-Year 2019 Non-GAAP EPS Guidance • 3Q19 GAAP EPS of $0.

Amended and Restated Bylaws (incorporated by reference to Exhibit 3.3 to the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2019 (File No. 1-34658)).

AMENDED AND RESTATED BYLAWS OF BWX TECHNOLOGIES, INC. TABLE OF CONTENTS Page Article I STOCKHOLDERS 1 Section 1.1 Annual Meetings 1 Section 1.2 Special Meetings 1 Section 1.3 Notice of Meetings 1 Section 1.4 Fixing Date for Determination of Stockholders of Record 2 Section 1.5 List of Stockholders Entitled To Vote 2 Section 1.6 Adjournments 2 Section 1.7 Quorum 3 Section 1.8 Organization 3 Section

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 5, 2019 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of in

BWX Technologies Reports Second Quarter 2019 Results With Solid Revenue and EPS Growth

BWX Technologies Reports Second Quarter 2019 Results With Solid Revenue and EPS Growth • 2Q19 EPS growth to $0.

Joinder Agreement, dated as of May 24, 2019, between BWXT Advanced Technologies LLC and Wells Fargo Bank, N.A., as Administrative Agent (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2019 (File No. 1-34658)).

JOINDER AGREEMENT This JOINDER AGREEMENT (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, this “Agreement”) dated as of May 24, 2019 between BWXT ADVANCED TECHNOLOGIES LLC, a Delaware limited liability company (the “New Subsidiary”), and WELLS FARGO BANK, N.

First Supplemental Indenture, dated May 24, 2019, among the Company, each of the guarantors party thereto and U.S. Bank National Association, as trustee (incorporated by reference to Exhibit 4.3 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2019 (File No. 1-34658)).

SUPPLEMENTAL INDENTURE SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of May 24, 2019, among BWX Technologies, Inc.

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 001

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 18, 2019 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of inc

BWXT Names Leland D. Melvin to Board of Directors

Exhibit 99.1 BWXT Names Leland D. Melvin to Board of Directors (LYNCHBURG, Va. - June 18, 2019) - BWX Technologies, Inc. (NYSE: BWXT) announced today that Leland D. Melvin has been appointed to its board of directors. Melvin spent more than 24 years with NASA as an astronaut, research engineer and administrator. He served twice on board the space shuttle Atlantis as a mission specialist to support

Conflict Minerals Report for the year ended December 31, 2018 as required by Items 1.01 and 1.02 of this Form.

Exhibit 1.01 BWX Technologies, Inc. Conflict Minerals Report For the Year Ended December 31, 2018 Statements we make in this Conflict Minerals Report ("Report"), which express a belief, expectation or intention, as well as those that are not historical fact, are forward-looking statements, including statements relating to our compliance efforts and expected actions identified under the "Steps to b

BWXT / BWX Technologies, Inc. SD - - SD CONFLICT MINERALS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM SD Specialized Disclosure Report BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) DELAWARE 001-34658 80-0558025 (State of Incorporation or Organization) (Commission File Number) (I.R.S. Employer Identification No.) 800 MAIN STREET, 4TH FLOOR LYNCHBURG, VIRGINIA 24504 (Address of Principal Exe

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 14, 2019 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of inco

Amended and Restated Bylaws (incorporated by reference to Exhibit 3.3 to the Company's Current Report on Form 8-K filed with the SEC on May 17, 2019 (File No. 1-34658)).

AMENDED AND RESTATED BYLAWS OF BWX TECHNOLOGIES, INC. TABLE OF CONTENTS Page Article I STOCKHOLDERS 1 Section 1.1 Annual Meetings 1 Section 1.2 Special Meetings 1 Section 1.3 Notice of Meetings 1 Section 1.4 Fixing Date for Determination of Stockholders of Record 2 Section 1.5 List of Stockholders Entitled To Vote 2 Section 1.6 Adjournments 2 Section 1.7 Quorum 3 Section 1.8 Organization 3 Section

Certificate of Amendment to Restated Certificate of Incorporation dated May 14, 2019 (incorporated by reference to Exhibit 3.1 to the Company's Current Report on Form 8-K filed with the SEC on May 17, 2019 (File No. 1-34658)).

CERTIFICATE OF AMENDMENT TO RESTATED CERTIFICATE OF INCORPORATION OF BWX TECHNOLOGIES, INC.

Restated Certificate of Incorporation of the Company, dated May 14, 2019 (incorporated by reference to Exhibit 3.2 to the Company's Current Report on Form 8-K filed with the SEC on May 17, 2019 (File No. 1-34658)).

RESTATED CERTIFICATE OF INCORPORATION of BWX TECHNOLOGIES, INC. BWX Technologies, Inc. (the “Corporation”), a corporation organized and existing under and by virtue of the General Corporation Law of the State of Delaware (the “DGCL”), hereby adopts this Restated Certificate of Incorporation, which accurately restates and integrates and does not further amend the provisions of the existing Certific

BWX Technologies Reports First Quarter 2019 Results with Record Backlog

BWX Technologies Reports First Quarter 2019 Results with Record Backlog • 1Q19 EPS of $0.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2019 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of incor

Form of 2019 Restricted Stock Unit Grant Agreement for Employees (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q filed for the quarter ended March 31, 2019 (File No. 1-34658)).

2019 RESTRICTED STOCK UNITS GRANT AGREEMENT To: By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the 2010 Long-Term Incentive Plan of BWX Technologies, Inc.

Form of 2019 Performance Restricted Stock Unit Grant Agreement for Employees (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q filed for the quarter ended March 31, 2019 (File No. 1-34658)).

2019 PERFORMANCE RESTRICTED STOCK UNITS GRANT AGREEMENT To: By accepting your grant online through the Schwab Equity Award Center, you agree that these incentives are granted under and governed by the terms and conditions of the 2010 Long-Term Incentive Plan of BWX Technologies, Inc.

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019. OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File No. 0

BWXT / BWX Technologies, Inc. DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6

BWXT / BWX Technologies, Inc. DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant Check the appropriate box: Preliminary Proxy Statement Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)

BWXT / BWX Technologies, Inc. PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant Check the appropriate box: ý Preliminary Proxy Statement Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 1, 2019 BWX TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-34658 80-0558025 (State or other jurisdiction (Commission (IRS Employer of inc

Amended and Restated Bylaws, dated March 1, 2019.

AMENDED AND RESTATED BYLAWS OF BWX TECHNOLOGIES, INC. TABLE OF CONTENTS Page Article I STOCKHOLDERS 1 Section 1.1 Annual Meetings 1 Section 1.2 Special Meetings 1 Section 1.3 Notice of Meetings 1 Section 1.4 Fixing Date for Determination of Stockholders of Record 2 Section 1.5 List of Stockholders Entitled To Vote 2 Section 1.6 Adjournments 2 Section 1.7 Quorum 3 Section 1.8 Organization 3 Section