X0508 4 2025-11-12 0001049521 MERCURY SYSTEMS INC MRCY 0002011703 Munro Douglas 50 MINUTEMAN ROAD ANDOVER MA 01810 1 SVP, CAO 0 Common Stock 2025-11-12 4 S 0 1329 73.4159 D 14678 D Common Stock 222 I 401K Plan This transaction was executed in multiple trades at prices ranging from $73.415 to $73.424. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. /s/ Douglas Munro 2025-11-13