BWX Technologies Officer Joseph Miller's Stock Transactions and RSU Vesting

This Form 4 filing reports transactions by Joseph K. Miller, President of Government Operations at BWX Technologies, Inc. On July 1, 2026, Miller received 237 shares of common stock through the vesting of Restricted Stock Units (RSUs) at $0 per share, increasing his direct holdings to 5,348 shares. Simultaneously, 237 RSUs were disposed of as they converted to common stock, leaving 474 RSUs remaining. Additionally, Miller sold 106 shares of common stock at $194.65 per share, reducing his direct holdings to 5,242 shares. The RSUs vest in three equal annual installments beginning July 1, 2026. These transactions represent routine equity compensation activity and portfolio management by a company officer.