Ratner Steven 4

What Happened
Steven Ratner, EVP and Chief Human Resources Officer of Mercury Systems (MRCY), was deemed to have acquired 437 restricted stock units (RSUs) as a matching award under the company's Deferred Compensation Matching Plan. The Form 4 reports an acquisition (code A) of 437 shares at $0.00 on 2026-03-16; the units became fully vested on that date.

Key Details

• Transaction date: 2026-03-16; Form 4 filed 2026-03-18 (appears timely).
• Reported transaction type/code: A (award/grant); price reported $0.00 (typical for vested RSUs on Form 4).
• Shares involved: 437 RSUs deemed acquired.
• Shares owned after transaction: not specified in the filing.
• Footnote: These were matching RSUs under Mercury’s Deferred Compensation Matching Plan. The award was originally granted 12/23/2024; the number earned was determined and units vested on 3/16/2026.

Context
This is a compensatory vesting event (an award), not an open-market purchase or sale. Such matching RSU vestings are common for executive compensation and do not, by themselves, indicate a buy or sell decision by the insider.