Mercury Systems Inc (MRCY) insider trading.
In Q3 2026, insiders at Mercury Systems Inc reported 46 non-derivative transactions on 26 Forms 3, 4 and 5: 0 open-market purchases and 31 sales worth $41.9M.
- Transactions
- 46
- Purchases (P)
- 0
- Sales (S)
- 31
- Net shares, P minus S
- -451,186
- Insiders
- 6
- Last filed
- 2026-09-23
Insiders
| Insider | Relationship | Transactions | Buys | Sales |
|---|---|---|---|---|
| Ballhaus William L | Director, Officer · Chairman, President & CEO | 19 | 0 | 12 |
| Ratner Steven | Officer · EVP, CHRO | 8 | 0 | 6 |
| Kupinsky Stuart | Officer · EVP, CLO & Corp Sec | 7 | 0 | 5 |
| Farnsworth David E. | Officer · EVP, CFO | 6 | 0 | 4 |
| Munro Douglas | Officer · SVP, CAO | 5 | 0 | 4 |
| Nearhos Barry R | Director | 1 | 0 | 0 |
Transactions
| Date | Insider | Code | Shares | Price | Owned after | Filing |
|---|---|---|---|---|---|---|
| 2026-09-21 | Kupinsky Stuart | S (D) | 1,000 | $86.52 | 60,971 | Form 4 |
| 2026-09-03 | Ratner Steven | S (D) | 4,000 | $84.51 | 19,275 | Form 4 |
| 2026-08-26 | Ballhaus William L | S (D) | 10,814 | $89.74 | 361,822 | Form 4 |
| 2026-08-26 | Ballhaus William L | S (D) | 38,276 | $88.91 | 372,636 | Form 4 |
| 2026-08-26 | Ballhaus William L | M (A) | 68,476 | $43 | 410,912 | Form 4 |
| 2026-08-25 | Ballhaus William L | S (D) | 3,448 | $87.99 | 342,436 | Form 4 |
| 2026-08-25 | Ballhaus William L | S (D) | 107,628 | $87.09 | 345,884 | Form 4 |
| 2026-08-25 | Ballhaus William L | M (A) | 153,676 | $43 | 453,512 | Form 4 |
| 2026-08-24 | Ballhaus William L | S (D) | 105,471 | $89.47 | 302,574 | Form 4 |
| 2026-08-24 | Ballhaus William L | S (D) | 2,738 | $90.6 | 299,836 | Form 4 |
| 2026-08-24 | Ballhaus William L | M (A) | 11,348 | $43 | 408,045 | Form 4 |
| 2026-08-24 | Ballhaus William L | M (A) | 140,650 | $42 | 396,697 | Form 4 |
| 2026-08-21 | Ballhaus William L | S (D) | 64,796 | $92.4 | 256,251 | Form 4 |
| 2026-08-21 | Ballhaus William L | S (D) | 204 | $93.51 | 256,047 | Form 4 |
| 2026-08-21 | Ballhaus William L | M (A) | 92,850 | $42 | 321,047 | Form 4 |
| 2026-08-21 | Kupinsky Stuart | S (D) | 1,000 | $95.23 | 56,352 | Form 4 |
| 2026-08-21 | Ratner Steven | S (D) | 356 | $91.36 | 0 | Form 4 |
| 2026-08-20 | Ballhaus William L | S (D) | 22,010 | $97.67 | 228,197 | Form 4 |
| 2026-08-20 | Farnsworth David E. | S (D) | 6,612 | $97.67 | 117,967 | Form 4 |
| 2026-08-20 | Ratner Steven | S (D) | 1,026 | $97.67 | 23,275 | Form 4 |
| 2026-08-20 | Munro Douglas | S (D) | 109 | $97.67 | 12,982 | Form 4 |
| 2026-08-19 | Ballhaus William L | S (D) | 26,802 | $100.31 | 250,207 | Form 4 |
| 2026-08-19 | Farnsworth David E. | S (D) | 8,155 | $100.31 | 124,579 | Form 4 |
| 2026-08-19 | Kupinsky Stuart | S (D) | 1,308 | $100.31 | 57,352 | Form 4 |
| 2026-08-19 | Ratner Steven | S (D) | 2,187 | $100.31 | 24,301 | Form 4 |
| 2026-08-19 | Munro Douglas | S (D) | 548 | $100.31 | 13,091 | Form 4 |
| 2026-08-18 | Ballhaus William L | S (D) | 24,144 | $111.36 | 277,009 | Form 4 |
| 2026-08-18 | Farnsworth David E. | S (D) | 7,347 | $111.36 | 132,734 | Form 4 |
| 2026-08-18 | Kupinsky Stuart | S (D) | 1,178 | $111.36 | 58,660 | Form 4 |
| 2026-08-18 | Ratner Steven | S (D) | 1,971 | $111.36 | 26,488 | Form 4 |
| 2026-08-18 | Munro Douglas | S (D) | 494 | $111.36 | 13,639 | Form 4 |
| 2026-08-17 | Ballhaus William L | A (A) | 23,629 | $0 | 324,782 | Form 4/A |
| 2026-08-17 | Farnsworth David E. | A (A) | 8,212 | $0 | 148,293 | Form 4/A |
| 2026-08-17 | Kupinsky Stuart | A (A) | 5,619 | $0 | 65,457 | Form 4/A |
| 2026-08-17 | Munro Douglas | A (A) | 2,882 | $0 | 17,015 | Form 4/A |
| 2026-08-17 | Ratner Steven | A (A) | 5,187 | $0 | 33,646 | Form 4/A |
| 2026-08-17 | Ballhaus William L | S (D) | 3,536 | $109.95 | 301,153 | Form 4 |
| 2026-08-17 | Farnsworth David E. | S (D) | 1,345 | $109.95 | 140,081 | Form 4 |
| 2026-08-17 | Kupinsky Stuart | S (D) | 1,195 | $109.95 | 59,838 | Form 4 |
| 2026-08-17 | Ratner Steven | S (D) | 1,084 | $109.95 | 28,459 | Form 4 |
| 2026-08-17 | Munro Douglas | S (D) | 404 | $109.95 | 14,133 | Form 4 |
| 2026-08-14 | Ballhaus William L | D (D) | 70,287 | $0 | 304,689 | Form 4 |
| 2026-08-14 | Farnsworth David E. | D (D) | 16,275 | $0 | 141,426 | Form 4 |
| 2026-08-14 | Kupinsky Stuart | D (D) | 6,977 | $0 | 61,033 | Form 4 |
| 2026-08-14 | Ratner Steven | D (D) | 2,695 | $0 | 29,543 | Form 4 |
| 2026-07-16 | Nearhos Barry R | A (A) | 170 | $0 | 31,494 | Form 4 |
Transaction codes in this quarter
Get MRCY insider transactions through the API
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curl "https://sec-api.dev/api/v1/insider-transactions?period=2026q3&cik=1049521&limit=100" \
-H "Authorization: Bearer $SEC_API_KEY"Insider trading API guide · MRCY company page · Mercury Systems Inc on SEC.gov
Questions
Are insiders buying or selling Mercury Systems Inc (MRCY)?
In Q3 2026, insiders at Mercury Systems Inc reported 46 non-derivative transactions on 26 Forms 3, 4 and 5: 0 open-market purchases and 31 sales worth $41.9M. Grants, tax withholding and option exercises are counted as transactions but are not purchases or sales.
Where do these Mercury Systems Inc insider trades come from?
From the SEC Insider Transactions Data Sets for Q3 2026, which republish the Forms 3, 4 and 5 filed on EDGAR. Each row links to its filing on SEC.gov.
Source: SEC Insider Transactions Data Sets, Q3 2026, retrieved 2026-10-27. Footnotes, derivative holdings and amendments are in the linked filings. Not investment advice.
Plain-text version for agents and LLMs: /insider-trading/mrcy.md
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