SC Filed 2022-01-13 Event — SEC 0001140361-22-001627 →

Starboard Value LP → MERCURY SYSTEMS INC MRCY

Stake: — Shares: —

Composite Decision Signal · PASS (LOW BASE-RATE EDGE) Conviction Score: 17/100 · Filer 90d Win Rate: 0% · Hist. 90d Edge: +0.0%

Filer track record (8 filings): 0% 90d win rate, +0.0% 90d edge
Elevated short days-to-cover (12.5 DTC)
Short interest building (+10.8% vs prior settlement)

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

3 transactions

1 buys · 2 sales · 0 awards/exercises

Issuer Cluster

2 13D/G filings on this issuer

1 other filing besides this one

Filer Track Record

98 filings by this filer

97 other filings in the data moat

Short Interest · settle 2026-10-15

DTC 12.50

5,556,601 shares short · +10.8% vs prior

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2026-10-21	KUPINSKY STUART	officer	Sale	1,000	$76.00	$76K
2026-09-03	Ratner Steven	officer	Sale	4,000	$84.51	$338K
2026-07-16	Nearhos Barry R	director	Award	170	—	—

Other 13D/G Filings on MERCURY SYSTEMS INC

Filed	Form	Filer	Stake	Shares
2022-06-27	SC	JANA PARTNERS LLC	—	—	view →

Other Filings by Starboard Value LP

Filed	Form	Issuer	Stake	Shares
2026-10-06	SCHEDULE 13D/A	Qorvo, Inc.	—	0	view →
2026-08-24	SCHEDULE 13D/A	BILL Holdings, Inc.	10.10%	8,639,900	view →
2026-06-02	SCHEDULE 13D/A	Qorvo, Inc. QRVO	—	5,611,526	view →
2026-04-01	SCHEDULE 13D/A	ALGONQUIN POWER & UTILITIES CORP. AGQPF	7.40%	57,215,415	view →
2026-01-23	SCHEDULE	ROGERS CORP ROG	3.30%	599,328	view →
2025-05-19	SCHEDULE	Qorvo, Inc. QRVO	8.90%	8,270,655	view →
2025-05-09	SCHEDULE	GREEN DOT CORP GDOT	3.80%	2,071,070	view →
2025-03-24	SCHEDULE	Qorvo, Inc. QRVO	8.90%	8,270,655	view →
2025-02-24	SCHEDULE	Fortrea Holdings Inc. FTRE	5.40%	4,864,000	view →
2025-01-31	SCHEDULE	Fortrea Holdings Inc. FTRE	5.80%	5,199,000	view →
2024-05-06	SC	Alight, Inc. / Delaware ALIT	—	—	view →
2024-02-26	SC	Fortrea Holdings Inc. FTRE	—	—	view →
2024-01-02	SC	Bloomin' Brands, Inc. BLMN	—	—	view →
2023-09-06	SC	Bloomin' Brands, Inc. BLMN	—	—	view →
2023-07-24	SC	ALGONQUIN POWER & UTILITIES CORP. AQNB	—	—	view →
2023-07-17	SC	ACACIA RESEARCH CORP ACTG	—	—	view →
2023-07-07	SC	ALGONQUIN POWER & UTILITIES CORP. AGQPF	—	—	view →
2023-06-20	SC	Wix.com Ltd. WIX	—	—	view →
2023-06-06	SC	ROGERS CORP ROG	—	—	view →
2023-05-22	SC	Cyxtera Technologies, Inc.	—	—	view →

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