James Bylund insider trades: Repligen (RGEN) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where James reports to the SEC
Open-market buys and sales
4 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Nov 18, 2025 | RGEN | ↓ Sell | 2,191 | $151.21 | $331K | Direct | Nov 19, 2025 (1d) |
| Feb 23, 2024 | RGEN | ↓ Sell | 4,373 | $198.08 | $866K | Direct | Feb 26, 2024 (3d) |
| Aug 3, 2022 | RGEN | ↓ Sell | 2,000 | $240.40 | $481K | Direct | Aug 4, 2022 (1d) |
| Apr 6, 2021 | RGEN | ↓ Sell | 360 | $204.25 | $74K | Direct | Apr 8, 2021 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other RGEN insiders
Open-market trades in the last 12 months
About James Bylund's insider trades
James Bylund is Chief Operating Officer at Repligen (RGEN). Since Apr 6, 2021, James has reported no open-market purchases and 4 sales worth $1.8M on SEC Form 4. In the last 12 months: 1 sale ($331K).
Their filings also include shares withheld for taxes (17 filings), grants and awards (10 filings), option exercises (2 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 RGEN insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.