X0609 4 2026-04-16 0001049521 MERCURY SYSTEMS INC MRCY 0001990150 Farnsworth David E. false 50 MINUTEMAN ROAD ANDOVER MA 01810 1 EVP, CFO 0 Common Stock 2026-04-16 4 S 0 3625 84.8719 D 157701 D Common Stock 1419 I 401K Plan Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards. Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated. /s/ Douglas Munro, attorney-in-fact 2026-04-17