SEC Form 4 Filing for Steven Ratner

This filing details a transaction by Steven Ratner, EVP, CHRO of MERCURY SYSTEMS INC. On September 3, 2026, Ratner sold 4,000 shares of Common Stock at a weighted average price of $84.51 per share. This transaction was executed in multiple trades at prices ranging from $84.49 to $84.52. Following this sale, Ratner directly owns 19,275 shares of Common Stock. Additionally, he has an indirect ownership of 55 shares in a 401K Plan. The filing was signed by Douglas Munro, attorney-in-fact, on September 8, 2026.