Quick Takeaways
- JANA Partners Management, LP filed SCHEDULE 13D/A for MERCURY SYSTEMS INC Common Stock, par value $0.01 per share (MRCY).
- Disclosed ownership: 6.9%.
- Date of event: 03 Mar 2026.
JANA Partners Management, LP - 03 Mar 2026 SCHEDULE 13D/A Report for MERCURY SYSTEMS INC Common Stock, par value $0.01 per share (MRCY)
- Filing Manager
- JANA Partners Management, LP
- Reporting Manager
- JANA Partners Management, LP
- Symbol
- MRCY
- Shares outstanding
- 59,632,145 shares
- Disclosed Ownership
- 4,114,618 shares
- Ownership
- 6.9%
- Form type
- SCHEDULE 13D/A
- Filing time
- 04 Mar 2026, 21:46:26 UTC
- Date of event
- 03 Mar 2026
- Previous filing
- 10 Nov 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"JANA Partners Management, LP disclosed 6.9% ownership in MERCURY SYSTEMS INC Common Stock, par value $0.01 per share (MRCY) on 03 Mar 2026."
What Changed
- Previous schedule filing date: 10 Nov 2025.
- Current filing was accepted on 04 Mar 2026, 21:46.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (1)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| JANA Partners Management, LP | 6.9% | 4,114,618 | 4,114,618 | 0 | /s/ Jennifer Fanjiang | Jennifer Fanjiang, Partner, Chief Legal Officer and Chief Compliance Officer | 0001998597 |