NASDAQ:RGEN

Repligen Stock Insider Trading

Healthcare > Medical - Instruments & Supplies

Buy RGEN

*Your capital is at risk

$141.01

-2.59 (-1.80%)

At Close: Jul 31, 2026

Repligen Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -62.41. In total, the insiders bought 297.9K and sold 146.99K RGEN shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	-62.41
● Buy	297.9K shares
● Sell	146.99K shares
50% Buy Activity Moderate Negative Correlation
Buy Signal Low Confidence Mar 05, 2026 Analysis Breakdown: Signal is highly questionable due to a strongly contradictory negative Insider Power Score of -62.41. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Mar 05, 2026 Buy	Common Stock A-Award	Bylund James Chief Operating Officer	C-Suite Officer	7 751 Value: $969.1K
Mar 05, 2026 Buy	Common Stock A-Award	Kuriyel Ralf Senior Vp, R&d	Officer	5 284 Value: $660.7K
Mar 05, 2026 Buy	Stock Option (Right to Buy) A-Award	Kuriyel Ralf Senior Vp, R&d	Officer	5 669 Value: $804.5K
Mar 05, 2026 Buy	Common Stock A-Award	Loeillot Olivier Chief Executive Officer	CEO / President	24 134 Value: $3.02M
Mar 05, 2026 Buy	Stock Option (Right to Buy) A-Award	Loeillot Olivier Chief Executive Officer	CEO / President	25 890 Value: $3.67M
Mar 04, 2026 Buy	Common Stock A-Award	Bylund James Chief Operating Officer	C-Suite Officer	125 Value: $15.7K
Mar 04, 2026 Sell	Common Stock F-InKind	Bylund James Chief Operating Officer	C-Suite Officer	62 Value: $8K
Mar 04, 2026 Buy	Common Stock A-Award	Kuriyel Ralf Senior Vp, R&d	Officer	125 Value: $15.7K
Mar 04, 2026 Sell	Common Stock F-InKind	Kuriyel Ralf Senior Vp, R&d	Officer	42 Value: $5K
Mar 02, 2026 Sell	Common Stock F-InKind	Garland Jason K CFO	C-Suite Officer	715 Value: $89.4K
Mar 02, 2026 Sell	Common Stock F-InKind	Hunt Anthony Director	Director	9 897 Value: $1.24M
Mar 02, 2026 Sell	Common Stock F-InKind	Loeillot Olivier Chief Executive Officer	CEO / President	1 610 Value: $201.2K
Mar 02, 2026 Sell	Common Stock F-InKind	Bylund James Chief Operating Officer	C-Suite Officer	2 433 Value: $304.1K
Mar 02, 2026 Sell	Common Stock F-InKind	Kuriyel Ralf Senior Vp, R&d	Officer	923 Value: $115.3K
Mar 02, 2026 Sell	Common Stock F-InKind	Douglass Brian Robb Chief Product Officer	Officer	221 Value: $27.6K
Feb 27, 2026 Sell	Common Stock F-InKind	Kuriyel Ralf Senior Vp, R&d	Officer	444 Value: $57.2K
Feb 27, 2026 Sell	Common Stock F-InKind	Garland Jason K CFO	C-Suite Officer	327 Value: $42.1K
Feb 27, 2026 Sell	Common Stock F-InKind	Bylund James Chief Operating Officer	C-Suite Officer	1 478 Value: $190.3K
Feb 27, 2026 Sell	Common Stock F-InKind	Loeillot Olivier Chief Executive Officer	CEO / President	344 Value: $44.3K
Dec 31, 2025 Buy	Common Stock	Douglass Brian Robb Chief Product Officer	Officer	0 Value: $0
Dec 31, 2025 Buy	Stock Option (Right to Buy) A-Award	Douglass Brian Robb Chief Product Officer	Officer	2 143 Value: $351.2K
Dec 31, 2025 Buy	Common Stock A-Award	Douglass Brian Robb Chief Product Officer	Officer	2 288 Value: $374.9K
Dec 31, 2025 Buy	Stock Option (Right to Buy)	Douglass Brian Robb Chief Product Officer	Officer	7 020 Value: $1.18M
Dec 17, 2025 Sell	Common Stock S-Sale	Dawes Karen A Director	Director	275 Value: $44.3K
Dec 16, 2025 Buy	Common Stock M-Exempt	Muir Glenn P Director	Director	3 366 Value: $87.9K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT REPLIGEN CORPORATION

Repligen Corporation develops and commercializes bioprocessing technologies and systems for use in biological drug manufacturing process in North America, Europe, the Asia Pacific, and internationally. It offers Protein A ligands that are the binding components of Protein A affinity chromatography resins; and cell culture growth factor products. The company's chromatography products include OPUS pre-packed chromatography columns, which are used i...

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