Stuart Kupinsky insider trades: Mercury Systems (MRCY) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Stuart reports to the SEC
Open-market buys and sales
11 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Oct 21, 2026 | MRCY | ↓ Sell10b5-1 | 1,000 | $76.00 | $76K | Direct | Oct 26, 2026 (5d) |
| Sep 21, 2026 | MRCY | ↓ Sell10b5-1 | 1,000 | $86.52 | $87K | Direct | Sep 23, 2026 (2d) |
| Aug 21, 2026 | MRCY | ↓ Sell10b5-1 | 1,000 | $95.23 | $95K | Direct | Aug 25, 2026 (4d) |
| Aug 19, 2026 | MRCY | ↓ Sell | 1,308 | $100.31 | $131K | Direct | Aug 21, 2026 (2d) |
| Aug 18, 2026 | MRCY | ↓ Sell | 2,373 | $110.65 | $263K | Direct | Aug 19, 2026 (1d) |
| Feb 17, 2026 | MRCY | ↓ Sell | 2,287 | $83.56 | $191K | Direct | Feb 19, 2026 (2d) |
| Aug 19, 2025 | MRCY | ↓ Sell | 2,402 | $65.47 | $157K | Direct | Aug 20, 2025 (1d) |
| Feb 18, 2025 | MRCY | ↓ Sell | 2,377 | $44.12 | $105K | Direct | Feb 19, 2025 (1d) |
| Aug 10, 2010 | TKLC | ↓ Sell | 3,000 | $11.91 | $36K | Direct | Aug 12, 2010 (2d) |
| Aug 10, 2009 | TKLC | ↓ Sell | 4,305 | $16.53 | $71K | Direct | Aug 11, 2009 (1d) |
| May 20, 2009 | TKLC | ↓ Sell | 12,834 | $16.27 | $209K | Direct | May 20, 2009 (0d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other MRCY insiders
Open-market trades in the last 12 months
About Stuart Kupinsky's insider trades
Stuart Kupinsky is EVP, CLO & Corp Sec at Mercury Systems (MRCY). Since May 20, 2009, Stuart has reported no open-market purchases and 11 sales worth $1.4M on SEC Form 4. In the last 12 months: 6 sales ($843K).
3 sales (18% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include grants and awards (13 filings), shares withheld for taxes (9 filings), option exercises (9 filings), shares returned to the company (4 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every MRCY insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.