SEC Insider Transactions from Bylund James.

Last updated: 2026-03-23 17:01 UTC | Total transactions: 27

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.

Set Up your own filters →
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%