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
Sep 10, 2025 Buy	Common Stock M-Exempt	Hunt Anthony Director	Director	20 000 Value: $677.4K
Sep 10, 2025 Sell	Common Stock S-Sale	Hunt Anthony Director	Director	96 Value: $11.2K
Sep 10, 2025 Sell	Common Stock S-Sale	Hunt Anthony Director	Director	1 108 Value: $131.1K
Sep 10, 2025 Sell	Common Stock S-Sale	Hunt Anthony Director	Director	3 262 Value: $390.3K
Sep 10, 2025 Sell	Common Stock S-Sale	Hunt Anthony Director	Director	14 882 Value: $1.79M
Sep 10, 2025 Sell	Common Stock S-Sale	Hunt Anthony Director	Director	7 584 Value: $920.8K
Sep 10, 2025 Sell	Common Stock S-Sale	Hunt Anthony Director	Director	2 179 Value: $266.3K
Sep 10, 2025 Sell	Common Stock S-Sale	Hunt Anthony Director	Director	2 179 Value: $266.3K
Sep 10, 2025 Sell	Common Stock S-Sale	Hunt Anthony Director	Director	7 584 Value: $920.8K
Sep 10, 2025 Sell	Common Stock S-Sale	Hunt Anthony Director	Director	14 882 Value: $1.79M
Sep 10, 2025 Sell	Common Stock S-Sale	Hunt Anthony Director	Director	3 262 Value: $390.3K
Sep 10, 2025 Sell	Common Stock S-Sale	Hunt Anthony Director	Director	1 108 Value: $131.1K
Sep 10, 2025 Sell	Common Stock S-Sale	Hunt Anthony Director	Director	96 Value: $11.2K
Sep 10, 2025 Buy	Common Stock M-Exempt	Hunt Anthony Director	Director	20 000 Value: $677.4K
Sep 10, 2025 Buy	Stock Option (Right to Buy) M-Exempt	Hunt Anthony Director	Director	20 000 Value: $677.4K
Sep 03, 2025 Sell	Common Stock F-InKind	Loeillot Olivier Chief Executive Officer	CEO / President	2 506 Value: $291.1K
Sep 03, 2025 Sell	Common Stock F-InKind	Loeillot Olivier Chief Executive Officer	CEO / President	2 506 Value: $291.1K
Sep 02, 2025 Buy	Common Stock A-Award	Hughes Violetta Chief Accounting Officer	Officer	4 142 Value: $499.9K
Sep 02, 2025 Buy	Stock Option (Right to Buy) A-Award	Hughes Violetta Chief Accounting Officer	Officer	3 914 Value: $472.4K
Sep 02, 2025 Buy	Stock Option (Right to Buy) A-Award	Hughes Violetta Chief Accounting Officer	Officer	3 914 Value: $472.4K
Sep 02, 2025 Buy	Common Stock A-Award	Hughes Violetta Chief Accounting Officer	Officer	4 142 Value: $499.9K
Sep 01, 2025 Buy	Common Stock J-Other	Hughes Violetta Insider	Other	0 Value: $0
Sep 01, 2025 Buy	Common Stock J-Other	Hughes Violetta Insider	Other	0 Value: $0
Aug 08, 2025 Buy	Common Stock P-Purchase	Madaus Martin D Director	Director	1 800 Value: $201.8K
Aug 08, 2025 Buy	Common Stock P-Purchase	Madaus Martin D Director	Director	1 800 Value: $201.8K

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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