MRCY insider buying and SEC filings, explained
Mercury Systems Inc. · CIK 1049521
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Company profile
- Exchanges
- Nasdaq
- Industry (SIC)
- Electronic Components & Accessories
- State of incorporation
- MA
- Fiscal year end
- Jun 30
- Former names
- MERCURY COMPUTER SYSTEMS INC
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$164.1M
Planned sales (10b5-1)
$258K
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Oct 21, 2026 | Planned (10b5-1) | Stuart Kupinsky (EVP, CLO & Corp Sec) sold 1,000 shares at $76.00 ($76K), marked as a 10b5-1 plan trade. Holdings down 2% to 59,971 shares. | SEC filing Filed Oct 26, 2026, 7:26 AM ET |
| Sep 21, 2026 | Planned (10b5-1) | Stuart Kupinsky (EVP, CLO & Corp Sec) sold 1,000 shares at $86.52 ($87K), marked as a 10b5-1 plan trade. Holdings down 2% to 60,971 shares. | SEC filing Filed Sep 23, 2026 |
| Sep 3, 2026 | Sale | Steven Ratner (EVP, CHRO) sold 4,000 shares at about $84.51 ($338K). Holdings down 17% to 19,275 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 8, 2026 |
| Aug 21, 2026 | Sale | Steven Ratner (EVP, CHRO) sold 356 shares indirectly (by retirement or benefit plan) at $91.36 ($33K). Holdings by retirement or benefit plan down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 25, 2026 |
| Aug 21, 2026 | Planned (10b5-1) | Stuart Kupinsky (EVP, CLO & Corp Sec) sold 1,000 shares at $95.23 ($95K), marked as a 10b5-1 plan trade. Holdings down 2% to 56,352 shares. | SEC filing Filed Aug 25, 2026 |
| Aug 19–20, 2026 | Sale | Douglas Munro (SVP, CAO) sold 657 shares between Aug 19 and Aug 20 at about $99.87 ($66K). Holdings down 5% to 12,982 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 21, 2026 |
| Aug 19–20, 2026 | Sale | Steven Ratner (EVP, CHRO) sold 3,213 shares between Aug 19 and Aug 20 at about $99.47 ($320K). Holdings down 12% to 23,275 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 21, 2026 |
| Aug 19, 2026 | Sale | Stuart Kupinsky (EVP, CLO & Corp Sec) sold 1,308 shares at $100.31 ($131K). Holdings down 2% to 57,352 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 21, 2026 |
| Aug 19–20, 2026 | Sale | David E. Farnsworth (CFO) sold 14,767 shares between Aug 19 and Aug 20 at about $99.13 ($1.5M). Holdings down 11% to 117,967 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 21, 2026 |
| Aug 19–20, 2026 | Sale | William L Ballhaus (CEO and Director) sold 48,812 shares between Aug 19 and Aug 20 at about $99.12 ($4.8M). Holdings down 18% to 228,197 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 21, 2026 |
| Aug 17–18, 2026 | Sale | Douglas Munro (SVP, CAO) sold 898 shares between Aug 17 and Aug 18 at about $110.73 ($99K). Holdings down 6% to 13,639 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 19, 2026 |
| Aug 17–18, 2026 | Sale | Steven Ratner (EVP, CHRO) sold 3,055 shares between Aug 17 and Aug 18 at about $110.86 ($339K). Holdings down 10% to 26,488 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 19, 2026 |
| Aug 17–18, 2026 | Sale | Stuart Kupinsky (EVP, CLO & Corp Sec) sold 2,373 shares between Aug 17 and Aug 18 at about $110.65 ($263K). Holdings down 4% to 58,660 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 19, 2026 |
| Aug 17–18, 2026 | Sale | David E. Farnsworth (CFO) sold 8,692 shares between Aug 17 and Aug 18 at about $111.14 ($966K). Holdings down 6% to 132,734 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 19, 2026 |
| Aug 17–18, 2026 | Sale | William L Ballhaus (CEO and Director) sold 27,680 shares between Aug 17 and Aug 18 at about $111.18 ($3.1M). Holdings down 9% to 277,009 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 19, 2026 |
| May 26, 2026 | Sale | Howard L. Lance (Director) sold 9,250 shares indirectly (by trust) at about $99.75 ($923K). Holdings by trust down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 27, 2026 |
| May 12, 2026 | Sale | Orlando D Carvalho (Director) sold 7,000 shares at $89.36 ($626K). Holdings down 12% to 52,448 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 13, 2026 |
| May 11, 2026 | Sale | Steven Ratner (EVP, CHRO) sold 2,000 shares at $92.46 ($185K). Holdings down 6% to 32,238 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 12, 2026 |
| Apr 16, 2026 | Sale | David E. Farnsworth (CFO) sold 3,625 shares at $84.87 ($308K). Holdings down 2% to 157,701 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 17, 2026 |
| Mar 2–4, 2026 | Sale | JANA Partners Management, LP (Director and Officer) sold 452,057 shares in 2 share classes indirectly between Mar 2 and Mar 4 at about $91.61 ($41.4M). Indirect holdings of Common Stock down 6% to 4,114,618 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 4, 2026 |
| Feb 25, 2026 | Sale | Howard L. Lance (Director) sold 4,832 shares at about $88.98 ($430K). Holdings down 15% to 27,272 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 27, 2026 |
| Feb 17, 2026 | Sale | Stuart Kupinsky (EVP, CLO & Corp Sec) sold 2,287 shares at $83.56 ($191K). Holdings down 3% to 68,010 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 19, 2026 |
| Feb 17, 2026 | Sale | Douglas Munro (SVP, CAO) sold 582 shares at $83.56 ($49K). Holdings down 4% to 14,328 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 19, 2026 |
| Feb 9, 2026 | Sale | JANA Partners Management, LP (Director and Officer) sold 400,000 shares indirectly at $81.00 ($32.4M). Indirect holdings down 8% to 4,566,675 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 11, 2026 |
| Nov 12, 2025 | Sale | Douglas Munro (SVP, CAO) sold 1,329 shares at about $73.42 ($98K). Holdings down 8% to 14,678 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 13, 2025 |
| Nov 7, 2025 | Sale | Debora A Plunkett (Director) sold 1,700 shares at $73.99 ($126K). Holdings down 9% to 16,833 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 10, 2025 |
| Nov 6, 2025 | Sale | JANA Partners Management, LP (Director and Officer) sold 1,000,000 shares indirectly at $75.45 ($75.5M). Indirect holdings down 17% to 4,966,675 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 10, 2025 |
22 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
| Filed | Items | Tag | Source |
|---|---|---|---|
| Nov 3, 2026, 4:01 PM ET 8-K | Executive or director change (Item 5.02) Shareholder vote results (Item 5.07) Other event (Item 8.01) | SEC filing |
Red flags are objective triggers only: the item or form filed, never an opinion.
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