James Bylund

Companies

• RepligenChief operating officer Feb 22, 2022 to now¹
• RepligenSVP, Global Operations & IT Mar 8, 2021 to Apr 8, 2021²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• RRepligen RGEN25,423 shares³$4.5M at $176.05Mar 5, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Mar 5, 2026Granted 7,751 shares of Repligen³
• Mar 4, 2026Shares withheld for tax 62 shares at $125.84 of Repligen⁴
• Mar 4, 2026Granted 125 shares of Repligen⁴
• Mar 2, 2026Shares withheld for tax 2,433 shares at $124.97 of Repligen⁵
• Feb 27, 2026Shares withheld for tax 1,478 shares at $128.73 of Repligen⁵
• Nov 18, 2025Sold 2,191 shares at $151.21 of Repligen⁶
• Apr 1, 2025Shares withheld for tax 454 shares at $128.50 of Repligen⁷
• Mar 13, 2025Shares withheld for tax 175 shares at $142.44 of Repligen⁸
• Mar 13, 2025Granted 381 shares of Repligen⁸
• Mar 3, 2025Shares withheld for tax 1,239 shares at $155.38 of Repligen⁹
• Mar 3, 2025Granted 6,435 shares of Repligen⁹
• Feb 27, 2025Shares withheld for tax 1,285 shares at $156.54 of Repligen¹⁰
• Feb 24, 2025Shares withheld for tax 543 shares at $164.74 of Repligen¹¹
• Apr 2, 2024Shares withheld for tax 444 shares at $182.95 of Repligen¹²
• Mar 7, 2024Shares withheld for tax 1,206 shares at $195.72 of Repligen¹³
• Mar 5, 2024Shares withheld for tax 22 shares at $195.52 of Repligen¹⁴
• Mar 4, 2024Shares withheld for tax 197 shares at $193.99 of Repligen¹⁴
• Mar 1, 2024Shares withheld for tax 820 shares at $191.79 of Repligen¹⁵
• Mar 1, 2024Granted 50 shares of Repligen¹⁶
• Feb 29, 2024Granted 404 shares of Repligen¹⁵
• Feb 27, 2024Granted 8,691 shares of Repligen¹⁷
• Feb 23, 2024Sold 4,373 shares at $198.08 of Repligen¹⁸
• Feb 23, 2024Exercised options 940 shares at $94.33 of Repligen¹⁸
• Apr 4, 2023Shares withheld for tax 334 shares at $163.45 of Repligen¹⁹
• Mar 3, 2023Shares withheld for tax 210 shares at $188.00 of Repligen²⁰