RGEN Insider Trading

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Insider Trading History
Frequently Asked Questions
About

Insider Ownership Percentage: 1.20%

Insider Buying (Last 12 Months): $239,506.50

Insider Selling (Last 12 Months): $0.00

Repligen Insider Trading History Chart

Repligen Share Price & Price History

^$158.01

▲ +4.57 (2.98%)

As of 11/12/2025 05:00 PM ET

Days: 30 | 90 | 365

Repligen Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
8/8/2025	Martin D. Madaus	Director	Buy	1,800	$112.13	$201,834.00	1,800
3/17/2025	Margaret Pax	Director	Buy	250	$150.69	$37,672.50	1,043
9/10/2024	Anthony Hunt	Director	Sell	22,191	$145.37	$3,225,905.67	139,840
8/1/2024	Ralf Kuriyel	VP	Sell	4,465	$165.67	$739,716.55	19,261
6/14/2024	Anthony Hunt	CEO	Buy	2,000	$124.08	$248,160.00	165,177
6/14/2024	Martin D. Madaus	Director	Buy	1,615	$124.94	$201,778.10	4,613
5/21/2024	Anthony Hunt	CEO	Sell	20,072	$168.26	$3,377,314.72	163,177
3/11/2024	Ralf Kuriyel	VP	Sell	3,517	$193.73	$681,348.41	24,260
3/8/2024	Anthony Hunt	CEO	Sell	16,707	$197.44	$3,298,630.08	185,249
2/27/2024	Karen A. Dawes	Director	Sell	1,000	$193.35	$193,350.00	87,367
2/23/2024	James Bylund	COO	Sell	4,373	$198.08	$866,203.84	14,135
11/10/2023	Christine Gebski	Insider	Sell	3,788	$147.13	$557,328.44	28,787
8/29/2023	Karen A. Dawes	Director	Sell	850	$171.38	$145,673.00	83,741
5/8/2023	Martin D. Madaus	Director	Buy	500	$156.18	$78,090.00	1,611
5/4/2023	Martin D. Madaus	Director	Buy	500	$161.15	$80,575.00	611
11/11/2022	Anthony Hunt	CEO	Sell	25,000	$200.00	$5,000,000.00	178,265
3/16/2022	Carrie Eglinton Manner	Director	Buy	625	$175.02	$109,387.50	2,106

SEC Filings (Institutional Ownership Changes) for Repligen (NASDAQ:RGEN)

97.64% of Repligen stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

Repligen Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
11/12/2025	Pitcairn Co.	2,702	$0.36M	0.0%	-25.6%	0.005%
11/12/2025	Crossmark Global Holdings Inc.	3,451	$0.46M	0.0%	-12.2%	0.006%
11/12/2025	Dimensional Fund Advisors LP	799,510	$106.83M	0.0%	+4.1%	1.420%
11/12/2025	NZS Capital LLC	196,777	$26.30M	0.8%	+35.4%	0.350%
11/12/2025	Legato Capital Management LLC	21,100	$2.82M	0.3%	+31.9%	0.037%
11/12/2025	South Dakota Investment Council	1,700	$0.23M	0.0%	-10.5%	0.003%
11/12/2025	Teachers Retirement System of The State of Kentucky	121,398	$16.23M	0.1%	+678.3%	0.216%
11/12/2025	Victory Capital Management Inc.	66,805	$8.93M	0.0%	-18.2%	0.119%
11/12/2025	Champlain Investment Partners LLC	1,339,246	$179.02M	1.3%	-4.4%	2.379%
11/12/2025	CI Investments Inc.	480	$64K	0.0%	-40.1%	0.001%
11/12/2025	Segall Bryant & Hamill LLC	139,378	$18.63M	0.2%	-6.2%	0.248%
11/12/2025	Royce & Associates LP	148,658	$19.87M	0.2%	+66.1%	0.264%
11/12/2025	American Century Companies Inc.	252,793	$33.79M	0.0%	+0.4%	0.449%
11/12/2025	Handelsbanken Fonder AB	17,892	$2.39M	0.0%	+24.8%	0.032%
11/12/2025	Artisan Partners Limited Partnership	212,741	$28.44M	0.0%	-3.5%	0.378%
11/12/2025	Diversify Wealth Management LLC	7,940	$1.06M	0.1%	+56.5%	0.014%
11/12/2025	Westpac Banking Corp	13,116	$1.75M	0.1%	-33.4%	0.023%
11/12/2025	Total Clarity Wealth Management Inc.	2,680	$0.36M	0.1%	-8.8%	0.005%
11/12/2025	Thornburg Investment Management Inc.	47,797	$6.39M	0.1%	+10.1%	0.085%
11/12/2025	Primecap Management Co. CA	186,868	$24.98M	0.0%	+35.1%	0.332%
11/12/2025	Intech Investment Management LLC	53,604	$7.17M	0.1%	+364.6%	0.095%
11/12/2025	US Bancorp DE	10,103	$1.35M	0.0%	+10.2%	0.018%
11/10/2025	North Star Asset Management Inc.	85,439	$11.42M	0.5%	-2.5%	0.152%
11/10/2025	TD Asset Management Inc	26,628	$3.56M	0.0%	-66.4%	0.047%
11/10/2025	Dana Investment Advisors Inc.	5,902	$0.79M	0.0%	+24.0%	0.010%
11/10/2025	Clearstead Advisors LLC	1,000	$0.13M	0.0%	-39.0%	0.002%
11/10/2025	Granite Investment Partners LLC	11,095	$1.48M	0.1%	-57.2%	0.020%
11/10/2025	Ameritas Investment Partners Inc.	15,373	$2.06M	0.1%	-4.5%	0.027%
11/10/2025	Alliance Wealth Advisors LLC UT	6,505	$0.87M	0.2%	+72.7%	0.012%
11/10/2025	Premier Fund Managers Ltd	2,399	$0.30M	0.0%	-41.7%	0.004%
11/10/2025	Mitsubishi UFJ Asset Management UK Ltd.	4,000	$0.54M	0.3%	N/A	0.007%
11/10/2025	China Universal Asset Management Co. Ltd.	5,000	$0.67M	0.1%	+4,247.8%	0.009%
11/7/2025	Hemenway Trust Co LLC	4,050	$0.54M	0.0%	-4.7%	0.007%
11/7/2025	Synovus Financial Corp	7,904	$1.06M	0.0%	-8.3%	0.014%
11/7/2025	NewEdge Wealth LLC	1,417	$0.21M	0.0%	-72.1%	0.003%
11/7/2025	CenterBook Partners LP	17,672	$2.36M	0.1%	N/A	0.031%
11/7/2025	Crestwood Advisors Group LLC	2,456	$0.33M	0.0%	-15.0%	0.004%
11/7/2025	GSA Capital Partners LLP	7,449	$1M	0.1%	+77.0%	0.013%
11/7/2025	Summitry LLC	1,497	$0.20M	0.0%	N/A	0.003%
11/7/2025	Zions Bancorporation National Association UT	13,575	$1.82M	0.1%	-12.9%	0.024%
11/7/2025	Vanguard Group Inc.	5,044,191	$674.26M	0.0%	-0.6%	8.966%
11/7/2025	Northwestern Mutual Investment Management Company LLC	11,787	$1.58M	0.0%	+1.0%	0.021%
11/7/2025	Fifth Third Bancorp	3,150	$0.42M	0.0%	-22.9%	0.006%
11/7/2025	State of New Jersey Common Pension Fund D	19,090	$2.55M	0.0%	+4.6%	0.034%
11/7/2025	PNC Financial Services Group Inc.	3,371	$0.45M	0.0%	+19.5%	0.006%
11/7/2025	Shell Asset Management Co.	498	$67K	0.0%	-19.4%	0.001%
11/7/2025	ABN Amro Investment Solutions	150,000	$0.15M	0.0%	N/A	0.267%
11/7/2025	TimesSquare Capital Management LLC	362,129	$48.41M	0.7%	+50.7%	0.644%
11/7/2025	Aberdeen Group plc	54,330	$7.26M	0.0%	+17.7%	0.097%
11/6/2025	IMA Advisory Services Inc.	730	$98K	0.0%	-90.4%	0.001%
11/6/2025	Rhumbline Advisers	139,602	$18.66M	0.0%	-1.8%	0.248%
11/6/2025	Impax Asset Management Group plc	703,237	$93.03M	0.5%	-7.6%	1.250%
11/6/2025	Advisors Asset Management Inc.	8,610	$1.15M	0.0%	-2.4%	0.015%
11/6/2025	Krilogy Financial LLC	13,662	$1.99M	0.1%	-32.4%	0.024%
11/6/2025	Johnson Investment Counsel Inc.	15,831	$2.12M	0.0%	+3.4%	0.028%
11/6/2025	Oppenheimer & Co. Inc.	1,500	$0.20M	0.0%	N/A	0.003%
11/6/2025	Oppenheimer Asset Management Inc.	16,848	$2.25M	0.0%	-3.4%	0.030%
11/6/2025	New York Life Investment Management LLC	5,330	$0.71M	0.0%	-3.1%	0.009%
11/5/2025	Azzad Asset Management Inc. ADV	8,183	$1.09M	0.1%	-60.7%	0.015%
11/5/2025	Ranger Investment Management L.P.	162,965	$21.78M	1.5%	-3.0%	0.290%
11/5/2025	Portside Wealth Group LLC	2,202	$0.29M	0.0%	N/A	0.004%
11/5/2025	Bessemer Group Inc.	12,079	$1.61M	0.0%	-95.2%	0.021%
11/5/2025	Envestnet Asset Management Inc.	104,235	$13.93M	0.0%	-1.5%	0.185%
11/5/2025	Hantz Financial Services Inc.	586	$78K	0.0%	+92.8%	0.001%
11/4/2025	Strengthening Families & Communities LLC	815	$0.11M	0.0%	N/A	0.001%
11/4/2025	Brown Capital Management LLC	668,858	$89.41M	3.7%	-33.5%	1.189%
11/4/2025	WCM Investment Management LLC	67,999	$8.44M	0.0%	-38.1%	0.121%
11/4/2025	Callan Family Office LLC	3,678	$0.49M	0.0%	-12.6%	0.007%
11/4/2025	Jones Financial Companies Lllp	3,312	$0.42M	0.0%	+29.3%	0.006%
11/4/2025	State of Wyoming	2,998	$0.40M	0.0%	+60.6%	0.005%
11/4/2025	Principal Financial Group Inc.	117,426	$15.70M	0.0%	-1.0%	0.209%
11/4/2025	UMB Bank n.a.	666	$89K	0.0%	+17.0%	0.001%
11/4/2025	Thrivent Financial for Lutherans	458,820	$61.33M	0.1%	+6.7%	0.816%
11/3/2025	AlphaQuest LLC	3,091	$0.41M	0.0%	+268.9%	0.005%
11/3/2025	Arizona State Retirement System	15,776	$2.11M	0.0%	+1.5%	0.028%
11/3/2025	Mirae Asset Global Investments Co. Ltd.	19,262	$2.58M	0.0%	-34.8%	0.034%
11/3/2025	Federated Hermes Inc.	4,724	$0.63M	0.0%	-3.2%	0.008%
11/3/2025	Truist Financial Corp	2,435	$0.33M	0.0%	-22.7%	0.004%
11/3/2025	EFG Asset Management North America Corp.	36,507	$4.88M	0.6%	+13.1%	0.065%
10/31/2025	Kornitzer Capital Management Inc. KS	78,280	$10.46M	0.2%	N/A	0.139%
10/31/2025	Vanguard Personalized Indexing Management LLC	5,096	$0.68M	0.0%	-2.7%	0.009%
10/31/2025	Mutual of America Capital Management LLC	25,568	$3.42M	0.0%	-12.4%	0.045%
10/31/2025	Retirement Systems of Alabama	63,938	$8.55M	0.0%	+0.1%	0.114%
10/31/2025	Drive Wealth Management LLC	3,605	$0.48M	0.1%	-5.0%	0.006%
10/30/2025	Teacher Retirement System of Texas	17,092	$2.29M	0.0%	+8.8%	0.030%
10/30/2025	Parkside Financial Bank & Trust	1,057	$0.14M	0.0%	-12.2%	0.002%
10/29/2025	Slow Capital Inc.	44,076	$5.89M	0.7%	+23.9%	0.078%
10/29/2025	Verdence Capital Advisors LLC	4,910	$0.66M	0.0%	+4.6%	0.009%
10/29/2025	Wealth Enhancement Advisory Services LLC	4,001	$0.58M	0.0%	+1.9%	0.007%
10/29/2025	Amalgamated Bank	24,285	$3.25M	0.0%	+0.6%	0.043%
10/28/2025	QRG Capital Management Inc.	2,421	$0.32M	0.0%	-3.2%	0.004%
10/28/2025	Stephens Investment Management Group LLC	598,356	$79.98M	1.0%	+14.4%	1.064%
10/28/2025	Washington Capital Management Inc.	2,800	$0.37M	0.3%	N/A	0.005%
10/28/2025	Campbell & CO Investment Adviser LLC	6,617	$0.88M	0.1%	+6.6%	0.012%
10/28/2025	Wilmington Savings Fund Society FSB	513	$69K	0.0%	+2,750.0%	0.001%
10/27/2025	Stephens Inc. AR	48,838	$6.57M	0.1%	+2.6%	0.087%
10/27/2025	Harbor Investment Advisory LLC	1,054	$0.14M	0.0%	-33.2%	0.002%
10/24/2025	Conestoga Capital Advisors LLC	956,913	$127.91M	2.0%	-2.0%	1.701%
10/24/2025	State of Alaska Department of Revenue	5,599	$0.75M	0.0%	-4.5%	0.010%
10/23/2025	SG Americas Securities LLC	14,962	$2M	0.0%	-12.4%	0.027%

Data available starting January 2016

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 in the purification of biologics; and OPUS smaller-scale columns that are used in the high throughput process development screening, viral clearance validation studies, and scale down validation of chromatography processes. It also offers ELISA test kits; and chromatography resins under the CaptivA brand. In addition, the company provides filtration products, such as XCell Alternating Tangential Flow systems that are filtration devices used in upstream perfusion and cell culture processing; TangenX flat sheet cassettes, which are used in downstream biologic drug concentration, buffer exchange, and formulation processes; KrosFlo tangential flow filtration and tangential flow depth filtration systems; Spectra/Por laboratory and process dialysis products, and ProConnex TFDF flow paths. Further, it provides process analytics products, such as slope spectroscopy systems under the SoloVPE, FlowVPE, and FlowVPX brands. The company sells its products to life sciences, biopharmaceutical, and diagnostics companies; laboratory researchers; and contract manufacturing organizations. Repligen Corporation has collaboration agreements with Navigo Proteins GmbH to develop multiple affinity ligands. The company was incorporated in 1981 and is headquartered in Waltham, Massachusetts.

Today's Range

Now: $158.01

$152.62

$158.74

50 Day Range

MA: $139.88

$113.54

$166.33

52 Week Range

Now: $158.01

$102.96

$182.52

Volume

1,386,660 shs

Average Volume

823,081 shs

Market Capitalization

$8.89 billion

P/E Ratio

7,904.45

Dividend Yield

N/A

Beta

1.14

Who are the company insiders with the largest holdings of Repligen?: Repligen's top insider investors include:
Anthony Hunt (CEO)
Anthony Hunt (Director)
Karen A Dawes (Director)
Ralf Kuriyel (VP)
James Bylund (COO)
Martin D Madaus (Director)
Margaret Pax (Director)
Learn More about top insider investors at Repligen.
Who are the major institutional investors of Repligen?: Repligen's top institutional shareholders include:
Vanguard Group Inc. — 8.97%
Conestoga Capital Advisors LLC — 1.70%
Impax Asset Management Group plc — 1.25%
Brown Capital Management LLC — 1.19%
Stephens Investment Management Group LLC — 1.06%
Thrivent Financial for Lutherans — 0.82%
Learn More about top institutional investors of Repligen stock.
Which institutional investors are selling Repligen stock?: Within the last quarter, RGEN stock was sold by these institutional investors:
Brown Capital Management LLC
Bessemer Group Inc.
Impax Asset Management Group plc
TD Asset Management Inc
WCM Investment Management LLC
Vanguard Group Inc.
Riverbridge Partners LLC
Conestoga Capital Advisors LLC
Which institutional investors are buying Repligen stock?: During the last quarter, RGEN stock was acquired by institutional investors including:
ABN Amro Investment Solutions
TimesSquare Capital Management LLC
Kornitzer Capital Management Inc. KS
Stephens Investment Management Group LLC
Congress Asset Management Co.
Delta Investment Management LLC
Primecap Management Co. CA
Intech Investment Management LLC
During the previous year, these company insiders have bought Repligen stock:
Anthony Hunt (CEO)
Anthony Hunt (Director)
Karen A Dawes (Director)
Learn More investors buying Repligen stock.