Bylund James, Chief Operating Officer of Repligen Corp ($RGEN), sold shares once on the open market in the last year, totaling about $331 thousand. His most recent sale occurred on November 18, 2025. This places him 7,358th among 11,678 insiders by sale value, well below the average of $8.6 million across 6.4 transactions. He made no open market purchases during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 5, 2026 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | A | Stock Option (Right to Buy) | 8315 | $0.00 | 8,315.0000 | 56,290,749 | 9999.99% | 0.01% |
| March 5, 2026 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | A | Common Stock | 7751 | $0.00 | 25,423.0000 | 56,290,749 | 43.86% | 0.01% |
| March 4, 2026 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | F | Common Stock | 62 | $125.84 | 17,672.0000 | 56,290,749 | 0.35% | 0.00% |
| March 4, 2026 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | A | Common Stock | 125 | $0.00 | 17,734.0000 | 56,290,749 | 0.71% | 0.00% |
| March 2, 2026 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | F | Common Stock | 2433 | $124.97 | 17,609.0000 | 56,290,749 | 12.14% | 0.00% |
| Feb. 27, 2026 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | F | Common Stock | 1478 | $128.73 | 20,042.0000 | 56,290,749 | 6.87% | 0.00% |
| Nov. 18, 2025 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | S | Common Stock | 2191 | $151.21 | 21,520.0000 | 56,290,749 | 9.24% | 0.00% |
| April 1, 2025 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | F | Common Stock | 454 | $128.50 | 23,711.0000 | 56,148,556 | 1.88% | 0.00% |
| March 13, 2025 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | F | Common Stock | 175 | $142.44 | 24,165.0000 | 56,148,556 | 0.72% | 0.00% |
| March 13, 2025 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | A | Common Stock | 381 | $0.00 | 24,340.0000 | 56,148,556 | 1.59% | 0.00% |
| March 3, 2025 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | A | Common Stock | 6435 | $0.00 | 25,198.0000 | 0 | 34.30% | 0.00% |
| March 3, 2025 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | F | Common Stock | 1239 | $155.38 | 23,959.0000 | 0 | 4.92% | 0.00% |
| March 3, 2025 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | A | Stock Option (Right to Buy) | 6056 | $0.00 | 6,056.0000 | 0 | 9999.99% | 0.00% |
| Feb. 27, 2025 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | F | Common Stock | 1285 | $156.54 | 18,763.0000 | 0 | 6.41% | 0.00% |
| Feb. 24, 2025 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | F | Common Stock | 543 | $164.74 | 20,048.0000 | 0 | 2.64% | 0.00% |
| April 2, 2024 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | F | Common Stock | 444 | $182.95 | 20,591.0000 | 0 | 2.11% | 0.00% |
| March 7, 2024 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | F | Common Stock | 1206 | $195.72 | 21,035.0000 | 0 | 5.42% | 0.00% |
| March 4, 2024 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | F | Common Stock | 197 | $193.99 | 22,263.0000 | 0 | 0.88% | 0.00% |
| March 5, 2024 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | F | Common Stock | 22 | $195.52 | 22,241.0000 | 0 | 0.10% | 0.00% |
| March 1, 2024 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | A | Common Stock | 50 | $0.00 | 22,460.0000 | 0 | 0.22% | 0.00% |
| March 1, 2024 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | F | Common Stock | 820 | $191.79 | 22,410.0000 | 0 | 3.53% | 0.00% |
| Feb. 29, 2024 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | A | Common Stock | 404 | $0.00 | 23,230.0000 | 0 | 1.77% | 0.00% |
| Feb. 27, 2024 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | A | Common Stock | 8691 | $0.00 | 22,826.0000 | 0 | 61.49% | 0.00% |
| Feb. 27, 2024 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | A | Stock Option (Right to Buy) | 8632 | $0.00 | 8,632.0000 | 0 | 9999.99% | 0.00% |
| Feb. 23, 2024 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | M | Common Stock | 940 | $94.33 | 18,508.0000 | 0 | 5.35% | 0.00% |
| Feb. 23, 2024 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | M | Stock Option (Right to Buy) | 940 | $0.00 | 4,000.0000 | 0 | 30.72% | 0.00% |
| Feb. 23, 2024 | REPLIGEN CORP | $RGEN | Bylund James | Chief Operating Officer | S | Common Stock | 4373 | $198.08 | 14,135.0000 | 0 | 23.63% | 0.00% |