SEC Form 4
Mercury Systems Inc. (MRCY) insider trading
In the 12 months to Oct 26, 2026, 7 MRCY insiders reported open-market sales of $152.2M across 13 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $152.2M
- 13 filings · 7 insiders
- Open-market purchases
- $0
- 0 filings
- Pre-arranged sales (10b5-1)
- 2 of 13
- $181.8K of $152.2M sold (0%)
Who traded MRCY, and when
- Sale
- Sale, pre-arranged (10b5-1)
MRCY daily close from Oct 27, 2025 to Oct 26, 2026, between $66.12 and $126.21, last $78.84. 13 sale and 0 purchase filings by 7 insiders, marked at their filing dates. JANA Partners Management, LP, Director: sold $149.3M across 3 filings, first filed Nov 10, 2025, last Mar 4, 2026. Howard L. Lance, Director: sold $1.4M across 2 filings, first filed Feb 27, 2026, last May 27, 2026. Orlando D. Carvalho, Director: sold $625.5K across 1 filing, first filed May 13, 2026, last May 13, 2026. Steven Ratner, EVP, CHRO: sold $555.5K across 3 filings, first filed May 12, 2026, last Sep 8, 2026. Stuart Kupinsky, EVP, CLO & Corp Sec: sold $181.8K across 2 filings, first filed Aug 25, 2026, last Sep 23, 2026. Debora A. Plunkett, Director: sold $125.8K across 1 filing, first filed Nov 10, 2025, last Nov 10, 2025. Douglas Munro, SVP, CAO: sold $97.6K across 1 filing, first filed Nov 13, 2025, last Nov 13, 2025.
Largest mark · tap a row for others
JANA Partners Management, LP · Director
Sale $75,450,000
1,000,000 shares at $75.45 avg
Filed Nov 10, 2025 · traded Nov 6
Close on filing date $74.65
JANA Partners Management, LP · Director
Director
$149.3M soldHoward L. Lance · Director
Director
$1.4M soldOrlando D. Carvalho · Director
Director
$625.5K soldSteven Ratner · EVP, CHRO
EVP, CHRO
$555.5K soldStuart Kupinsky · EVP, CLO & Corp Sec
EVP, CLO & Corp Sec
$181.8K soldDebora A. Plunkett · Director
Director
$125.8K soldDouglas Munro · SVP, CAO
SVP, CAO
$97.6K soldOpen-market trades
13 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| JANA Partners Management, LP | Director | $149.3M | — | 3 | — | |
| Howard L. Lance | Director | $1.4M | — | 2 | — | |
| Orlando D. Carvalho | Director | $625.5K | — | 1 | — | |
| Steven Ratner | EVP, CHRO | $555.5K | — | 3 | — | |
| Stuart Kupinsky | EVP, CLO & Corp Sec | $181.8K | — | 2 | 100% of sales | |
| Debora A. Plunkett | Director | $125.8K | — | 1 | — | |
| Douglas Munro | SVP, CAO | $97.6K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Stuart Kupinsky EVP, CLO & Corp Sec | SalePre-arranged (10b5-1) | 1,000 | $86.52 | $86.5K | 60,971 | |
traded | Steven Ratner EVP, CHRO | Sale | 4,000 | $84.51 | $338.0K | 19,275 | |
traded | Stuart Kupinsky EVP, CLO & Corp Sec | SalePre-arranged (10b5-1) | 1,000 | $95.23 | $95.2K | 56,352 | |
traded | Steven Ratner EVP, CHRO | Sale | 356 | $91.36 | $32.5K | 0 | |
traded | Howard L. Lance Director | Sale | 9,250 | $99.76 | $922.7K | 0 | |
traded | Orlando D. Carvalho Director | Sale | 7,000 | $89.36 | $625.5K | 52,448 | |
traded | Steven Ratner EVP, CHRO | Sale | 2,000 | $92.46 | $184.9K | 32,238 | |
traded | JANA Partners Management, LP Director | Sale | 452,057 | $91.61 | $41.4M | 4,114,618 | |
traded | Howard L. Lance Director | Sale | 4,832 | $88.98 | $430.0K | 27,272 | |
traded | JANA Partners Management, LP Director | Sale | 400,000 | $81.00 | $32.4M | 4,566,675 | |
traded | Douglas Munro SVP, CAO | Sale | 1,329 | $73.42 | $97.6K | 14,678 | |
traded | JANA Partners Management, LP Director | Sale | 1,000,000 | $75.45 | $75.5M | 4,966,675 | |
traded | Debora A. Plunkett Director | Sale | 1,700 | $73.99 | $125.8K | 16,833 |
GET /stocks/filings/vX/form-4?tickers=MRCY&filing_date.gte=2025-10-26&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"MRCY"
],
"issuer_cik": "0001049521",
"owner_cik": "0001289593",
"accession_number": "0001049521-26-000083",
"form_type": "4",
"filing_date": "2026-09-23",
"period_of_report": "2026-09-21",
"issuer_name": "MERCURY SYSTEMS INC",
"issuer_trading_symbol": "MRCY",
"owner_name": "KUPINSKY STUART",
"is_officer": true,
"officer_title": "EVP, CLO & Corp Sec",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-09-21",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 1000,
"transaction_price_per_share": 86.52,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 60971,
"transaction_value": 86520,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "Represents the sale of shares effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 7, 2026."
}
]
},
{
"tickers": [
"MRCY"
],
"issuer_cik": "0001049521",
"owner_cik": "0001995110",
"accession_number": "0001049521-26-000065",
"form_type": "4",
"filing_date": "2026-09-08",
"period_of_report": "2026-09-03",
"issuer_name": "MERCURY SYSTEMS INC",
"issuer_trading_symbol": "MRCY",
"owner_name": "Ratner Steven",
"is_officer": true,
"officer_title": "EVP, CHRO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-09-03",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 4000,
"transaction_price_per_share": 84.5076,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 19275,
"transaction_value": 338030.39999999997,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "This transaction was executed in multiple trades at prices ranging from $84.49 to $84.52. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 49 records
- Option exercises5 records
- Tax withholding (sold to cover)30 records
- Grants and awards10 records
- Other4 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.
Frequently asked questions
Has Mercury Systems Inc.'s CEO sold stock?
No. William L. Ballhaus (CEO) made no open-market sales filed as CEO in the last 12 months.
How current is MRCY’s insider data?
These are MRCY Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.
What counts as an open-market buy or sell?
Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.
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This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for MRCY every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
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