NASDAQ:RGEN

Repligen Stock Insider Trading

Healthcare > Medical - Instruments & Supplies

Buy RGEN

*Your capital is at risk

$126.57

-5.45 (-4.13%)

At Close: Jun 22, 2026

Repligen Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -61.94. In total, the insiders bought 300.67K and sold 145.72K 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)	-61.94
● Buy	300.67K shares
● Sell	145.72K shares
52% Buy Activity Weak 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 -61.94. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
May 14, 2026 Buy	Common Stock A-Award	Mhatre Rohin Director	Director	995 Value: $102.9K
May 14, 2026 Buy	Common Stock A-Award	Eglinton Manner Carrie Director	Director	995 Value: $102.9K
May 14, 2026 Buy	Stock Option (Right to Buy) A-Award	Konstantinov Konstantin Director	Director	2 239 Value: $231.5K
May 14, 2026 Buy	Common Stock A-Award	Konstantinov Konstantin Director	Director	995 Value: $102.9K
May 14, 2026 Buy	Stock Option (Right to Buy) A-Award	Madaus Martin D Director	Director	2 239 Value: $231.5K
May 14, 2026 Buy	Common Stock A-Award	Madaus Martin D Director	Director	995 Value: $102.9K
May 14, 2026 Buy	Stock Option (Right to Buy) A-Award	Mhatre Rohin Director	Director	2 239 Value: $231.5K
May 14, 2026 Buy	Stock Option (Right to Buy) A-Award	Eglinton Manner Carrie Director	Director	2 239 Value: $231.5K
May 14, 2026 Buy	Common Stock A-Award	Pax Margaret Director	Director	995 Value: $102.9K
May 14, 2026 Buy	Stock Option (Right to Buy) A-Award	Pax Margaret Director	Director	2 239 Value: $231.5K
May 14, 2026 Buy	Common Stock A-Award	Dawes Karen A Director	Director	995 Value: $102.9K
May 14, 2026 Buy	Common Stock A-Award	Muir Glenn P Director	Director	995 Value: $102.9K
May 14, 2026 Buy	Stock Option (Right to Buy) A-Award	Muir Glenn P Director	Director	2 239 Value: $231.5K
May 14, 2026 Buy	Stock Option (Right to Buy) A-Award	Dawes Karen A Director	Director	2 239 Value: $231.5K
May 14, 2026 Buy	Common Stock A-Award	Barthelemy Nicolas Director	Director	995 Value: $102.9K
May 14, 2026 Buy	Stock Option (Right to Buy) A-Award	Barthelemy Nicolas Director	Director	2 239 Value: $231.5K
May 07, 2026 Sell	Common Stock F-InKind	Douglass Brian Robb Chief Product Officer	Officer	334 Value: $42.2K
May 07, 2026 Buy	Stock Option (Right to Buy) M-Exempt	Muir Glenn P Director	Director	2 434 Value: $94.3K
May 07, 2026 Buy	Common Stock M-Exempt	Muir Glenn P Director	Director	2 434 Value: $94.3K
Apr 21, 2026 Sell	Common Stock S-Sale	Loeillot Olivier Chief Executive Officer	CEO / President	3 832 Value: $536.5K
Mar 05, 2026 Buy	Stock Option (Right to Buy) A-Award	Garland Jason K CFO	C-Suite Officer	8 315 Value: $1.18M
Mar 05, 2026 Buy	Common Stock A-Award	Garland Jason K CFO	C-Suite Officer	7 751 Value: $969.1K
Mar 05, 2026 Buy	Stock Option (Right to Buy) A-Award	Bylund James Chief Operating Officer	C-Suite Officer	8 315 Value: $1.18M
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

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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