Company: BWXT
Filing Date: 2025-03-19
Form Type: DEF 14A
Source: 0001486957-25-000016
Chunk: 90

Company: BWX Technologies, Inc.
Filing Date: 2025-03-19
Form: DEF 14A
Chunk 90
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| Signature [PLEASE SIGN WITHIN BOX]                                                                                                                                                                                                                                                                                                                                         |     |                                                                                                                     |     | Date |     |         |     |         |     | Signature (Joint Owners) |     |     |     | Date    |     |         |

<div align='center'>BWX Technologies, Inc.

Annual Meeting of Stockholders

Friday, May 2, 2025 at 9:30 a.m. Eastern Daylight Time

Via live webcast at www.virtualshareholdermeeting.com/BWXT2025

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting:

The Notice and Proxy Statement and Annual Report are available at www.proxyvote.com.

IF YOU HAVE NOT VOTED VIA THE INTERNET OR TELEPHONE, FOLD ALONG PERFORATION, DETACH</div>

### AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE
| BWX TECHNOLOGIES, INC.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
 THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
 ANNUAL MEETING OF STOCKHOLDERS                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
 Friday, May 2, 2025                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
 The undersigned stockholder(s) hereby appoint(s) Rex D. Geveden and Ronald O. Whitford, Jr., or either of them, as proxies, each with the power to appoint his substitute, to represent and to vote, as designated on the reverse side of this ballot, all of the shares of common stock of BWX Technologies, Inc. that the stockholder(s) is/are entitled to vote at the Annual Meeting of Stockholders to be held at 9:30 a.m. Eastern Daylight Time on May 2, 2025 via live webcast at www.virtualshareholdermeeting.com/BWXT2025, and any adjournment or postponement thereof.                                                                                                                                                                                                                                    
 THIS PROXY, WHEN PROPERLY EXECUTED, WILL BE VOTED IN THE MANNER DIRECTED HEREIN. IF NO SUCH DIRECTION IS MADE, THIS PROXY WILL BE VOTED IN ACCORDANCE WITH THE BOARD OF DIRECTORS’ RECOMMENDATIONS.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
 ATTENTION PARTICIPANTS IN BWXT