Stuart Kupinsky

CIK: 0001289593

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)10 (71.4%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)3 (21.4%)

Compensation grants

Other (G, F, J, C, D, …)1 (7.1%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

MRCY

MERCURY SYSTEMS INC

Officer

Discretionary Trading P&L

Holdings

Transaction History (14 total)

MRCY
MERCURY SYSTEMS INC
Oct 21, 2026
Sale(S)
Direct
1K shares at avg. $76.00$76K
MRCY
MERCURY SYSTEMS INC
Sep 21, 2026
Sale(S)
Direct
1K shares at avg. $86.52$87K
MRCY
MERCURY SYSTEMS INC
Aug 21, 2026
Sale(S)
Direct
1K shares at avg. $95.23$95K
MRCY
MERCURY SYSTEMS INC
Aug 19, 2026
Sale(S)
Direct
1.3K shares at avg. $100.31$131K
MRCY
MERCURY SYSTEMS INC
Aug 18, 2026
Sale(S)
Direct
1.2K shares at avg. $111.36$131K
MRCY
MERCURY SYSTEMS INC
Aug 17, 2026
Award(A)
Direct
5.6K shares-
MRCY
MERCURY SYSTEMS INC
Aug 17, 2026
Sale(S)
Direct
1.2K shares at avg. $109.95$131K
MRCY
MERCURY SYSTEMS INC
Aug 14, 2026
Disposition(D)
Direct
7K shares-
MRCY
MERCURY SYSTEMS INC
Feb 17, 2026
Sale(S)
Direct
2.3K shares at avg. $83.56$191K
MRCY
MERCURY SYSTEMS INC
Aug 19, 2025
Sale(S)
Direct
1.2K shares at avg. $64.46$79K
MRCY
MERCURY SYSTEMS INC
Aug 18, 2025
Sale(S)
Direct
1.2K shares at avg. $66.52$79K
MRCY
MERCURY SYSTEMS INC
Aug 15, 2025
Award(A)
Direct
9.9K shares-
MRCY
MERCURY SYSTEMS INC
Feb 18, 2025
Sale(S)
Direct
2.4K shares at avg. $44.12$105K
MRCY
MERCURY SYSTEMS INC
Aug 15, 2024
Award(A)
Direct
15.7K shares-

		Type	Shares	Price		Ownership
Oct 21, 2026	MRCY MERCURY SYSTEMS INC	Sale(S)	1,000	$76.00	$76,000	Direct
Sep 21, 2026	MRCY MERCURY SYSTEMS INC	Sale(S)	1,000	$86.52	$86,520	Direct
Aug 21, 2026	MRCY MERCURY SYSTEMS INC	Sale(S)	1,000	$95.23	$95,230	Direct
Aug 19, 2026	MRCY MERCURY SYSTEMS INC	Sale(S)	1,308	$100.31	$131,200	Direct
Aug 18, 2026	MRCY MERCURY SYSTEMS INC	Sale(S)	1,178	$111.36	$131,179	Direct
Aug 17, 2026	MRCY MERCURY SYSTEMS INC	Award(A)	5,619	-	$0	Direct
Aug 17, 2026	MRCY MERCURY SYSTEMS INC	Sale(S)	1,195	$109.95	$131,391	Direct
Aug 14, 2026	MRCY MERCURY SYSTEMS INC	Disposition(D)	6,977	-	$0	Direct
Feb 17, 2026	MRCY MERCURY SYSTEMS INC	Sale(S)	2,287	$83.56	$191,091	Direct
Aug 19, 2025	MRCY MERCURY SYSTEMS INC	Sale(S)	1,220	$64.46	$78,646	Direct
Aug 18, 2025	MRCY MERCURY SYSTEMS INC	Sale(S)	1,182	$66.52	$78,622	Direct
Aug 15, 2025	MRCY MERCURY SYSTEMS INC	Award(A)	9,865	-	-	Direct
Feb 18, 2025	MRCY MERCURY SYSTEMS INC	Sale(S)	2,377	$44.12	$104,883	Direct
Aug 15, 2024	MRCY MERCURY SYSTEMS INC	Award(A)	15,657	-	$0	Direct

1-14 of 14 transactions

About KUPINSKY STUART

KUPINSKY STUART (SEC CIK 0001289593) files insider reports with the SEC as EVP, CLO & Corp Sec of MERCURY SYSTEMS INC (MRCY).

Signal8 holds 12 ownership filings by KUPINSKY STUART, all Form 4s, filed between Sep 18, 2024 and Oct 26, 2026. Those filings report 14 transactions, from Aug 15, 2024 to Oct 21, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on KUPINSKY STUART's filings is in ANDOVER, MA.

Recent filings by KUPINSKY STUART

Oct 21, 2026: Open-market sale of MRCY shares (Form 4, code S).
Sep 21, 2026: Open-market sale of MRCY shares (Form 4, code S).
Aug 21, 2026: Open-market sale of MRCY shares (Form 4, code S).
Aug 19, 2026: Open-market sale of MRCY shares (Form 4, code S).
Aug 18, 2026: Open-market sale of MRCY shares (Form 4, code S).

Other insiders filing for MERCURY SYSTEMS INC (MRCY)

Ostfeld Scott, Director
DEMURO GERARD J, Director
Plunkett Debora A, Director
Nearhos Barry R, Director
BUA JEAN A, Director
LANCE HOWARD L, Director

How to read Form 4 transaction codes