Stuart Kupinsky - 17 Feb 2026 Form 4 Insider Report for MERCURY SYSTEMS INC (MRCY)

Reporting relationship: EVP, CLO & Corp Sec
Issuer ticker: MRCY
Reported as of: 17 Feb 2026
Net transaction value: -$191,091
SEC form: 4
Accepted by SEC: 19 Feb 2026, 16:47:23 UTC
Prior SEC filing: 20 Aug 2025
Source filing: View source filing
Reporting owner signature: /s/ Douglas Munro, attorney-in-fact

Key filing fact

Stuart Kupinsky filed Form 4 for MERCURY SYSTEMS INC (MRCY) on 19 Feb 2026.

Key facts

This page summarizes Stuart Kupinsky's Form 4 filing for MERCURY SYSTEMS INC (MRCY).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 19 Feb 2026, 16:47.

Change

Previous filing in this sequence was filed on 20 Aug 2025.
Current net transaction value: -$191,091.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001289593 Primary reporting owner

KUPINSKY STUART

Relationship: EVP, CLO & Corp Sec
Address: 50 MINUTEMAN ROAD, ANDOVER
Signature: /s/ Douglas Munro, attorney-in-fact
Signature date: 19 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MRCY transaction

Common Stock

Sale

Transaction value: $191,091
Shares: -2,287
Change %: -3.3%
Price: $83.56
Shares after: 68,010
Date: 17 Feb 2026
Ownership: Direct
Footnotes: F1, F2

MRCY holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,082
Date: 17 Feb 2026
Ownership: 401K Plan

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

Footnote F2

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.