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): $7,676,802.22

Repligen Insider Trading History Chart

Repligen Share Price & Price History

^$165.76

▼ -0.76 (-0.46%)

As of 12/4/2025 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
11/18/2025	James Bylund	COO	Sell	2,191	$151.21	$331,301.11	21,520
11/18/2025	James Bylund	COO	Sell	2,191	$151.21	$331,301.11	21,520
11/13/2025	Anthony Hunt	Director	Sell	20,000	$154.61	$3,092,200.00	80,743
11/12/2025	Anthony Hunt	Director	Sell	25,000	$156.88	$3,922,000.00	100,743
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
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
12/2/2025	Swiss Life Asset Management Ltd	2,477	$0.33M	0.0%	N/A	0.004%
12/1/2025	Groupama Asset Managment	401,534	$53.67M	0.2%	-0.9%	0.713%
11/21/2025	CIBC Bancorp USA Inc.	3,632	$0.49M	0.0%	N/A	0.006%
11/20/2025	Kensington Investment Counsel LLC	8,092	$1.08M	0.4%	-11.2%	0.014%
11/20/2025	Wilmington Savings Fund Society FSB	513	$69K	0.0%	+2,750.0%	0.001%
11/19/2025	Danske Bank A S	800	$0.11M	0.0%	N/A	0.001%
11/18/2025	Advisory Services Network LLC	1,268	$0.17M	0.0%	N/A	0.002%
11/17/2025	Armistice Capital LLC	2,367	$0.32M	0.0%	N/A	0.004%
11/17/2025	CANADA LIFE ASSURANCE Co	36,599	$4.54M	0.0%	+0.3%	0.065%
11/17/2025	Woodline Partners LP	105,449	$14.10M	0.1%	+927.0%	0.187%
11/17/2025	Dark Forest Capital Management LP	2,994	$0.40M	0.0%	-59.5%	0.005%
11/17/2025	Alyeska Investment Group L.P.	123,000	$16.44M	0.0%	-70.2%	0.219%
11/17/2025	United Capital Financial Advisors LLC	2,755,943	$368.39M	2.6%	N/A	4.896%
11/17/2025	Utah Retirement Systems	2,784	$0.37M	0.0%	-69.2%	0.005%
11/17/2025	Voloridge Investment Management LLC	141,042	$18.85M	0.1%	N/A	0.251%
11/17/2025	Vestal Point Capital LP	400,000	$53.47M	2.4%	N/A	0.711%
11/17/2025	Sandler Capital Management	11,304	$1.51M	0.4%	N/A	0.020%
11/17/2025	Sherbrooke Park Advisers LLC	2,955	$0.40M	0.2%	+28.0%	0.005%
11/17/2025	Public Employees Retirement System of Ohio	51,883	$6.94M	0.0%	+213.9%	0.092%
11/17/2025	Northern Trust Corp	464,126	$62.04M	0.0%	-1.2%	0.825%
11/17/2025	Measured Wealth Private Client Group LLC	215	$29K	0.0%	N/A	0.000%
11/17/2025	LRT Capital Management LLC	19,619	$2.62M	1.7%	+5.0%	0.035%
11/17/2025	Lighthouse Investment Partners LLC	13,000	$1.74M	0.1%	N/A	0.023%
11/17/2025	Iron Triangle Partners LP	270,000	$36.09M	5.1%	N/A	0.480%
11/17/2025	Holocene Advisors LP	1,377,104	$184.08M	0.4%	+47.0%	2.446%
11/17/2025	Gotham Asset Management LLC	43,213	$5.78M	0.0%	+83.4%	0.077%
11/17/2025	Granahan Investment Management LLC	69,871	$9.34M	0.4%	-48.3%	0.124%
11/17/2025	Fred Alger Management LLC	358,422	$47.91M	0.2%	+19.7%	0.637%
11/17/2025	First Light Asset Management LLC	41,427	$5.54M	0.5%	-5.7%	0.074%
11/17/2025	Cinctive Capital Management LP	25,420	$3.40M	0.2%	N/A	0.045%
11/17/2025	Bamco Inc. NY	381,678	$51.02M	0.1%	+39.1%	0.678%
11/17/2025	California Public Employees Retirement System	70,252	$9.39M	0.0%	+3.3%	0.125%
11/17/2025	Bank of Nova Scotia	40,657	$5.44M	0.0%	+28.1%	0.072%
11/17/2025	Algert Global LLC	9,530	$1.27M	0.0%	N/A	0.017%
11/17/2025	Alliancebernstein L.P.	1,104,171	$147.60M	0.0%	+21.8%	1.962%
11/17/2025	Ameriprise Financial Inc.	509,611	$68.12M	0.0%	+6.1%	0.905%
11/14/2025	Schonfeld Strategic Advisors LLC	16,331	$2.18M	0.0%	+118.7%	0.029%
11/14/2025	Creative Planning	4,005	$0.54M	0.0%	-9.8%	0.007%
11/14/2025	Raymond James Financial Inc.	150,142	$20.07M	0.0%	-57.8%	0.267%
11/14/2025	Amundi	4,625	$0.62M	0.0%	-6.0%	0.008%
11/14/2025	American Capital Management Inc.	336,862	$45.03M	1.8%	+2.3%	0.598%
11/14/2025	Deerfield Management Company L.P.	12,909	$1.73M	0.0%	+692.9%	0.023%
11/14/2025	California State Teachers Retirement System	49,837	$6.66M	0.0%	-1.8%	0.089%
11/14/2025	Daiwa Securities Group Inc.	51,238	$6.85M	0.0%	+64.3%	0.091%
11/14/2025	Osterweis Capital Management Inc.	72,930	$9.75M	0.4%	N/A	0.130%
11/14/2025	DF Dent & Co. Inc.	534,719	$71.48M	0.9%	-8.8%	0.950%
11/14/2025	Balyasny Asset Management L.P.	767,239	$102.56M	0.1%	+390.6%	1.363%
11/14/2025	UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC	164,567	$22M	0.0%	-36.4%	0.292%
11/14/2025	Two Sigma Investments LP	94,861	$12.68M	0.0%	-69.7%	0.169%
11/14/2025	Squarepoint Ops LLC	175,248	$23.43M	0.0%	+137.5%	0.311%
11/14/2025	Arrowpoint Investment Partners Singapore Pte. Ltd.	1,520	$0.20M	0.2%	N/A	0.003%
11/14/2025	Nicolet Advisory Services LLC	5,178	$0.76M	0.1%	+10.6%	0.009%
11/14/2025	Glenmede Investment Management LP	8,133	$1.09M	0.0%	+11.2%	0.014%
11/13/2025	Jump Financial LLC	23,086	$3.09M	0.0%	N/A	0.041%
11/13/2025	Pathstone Holdings LLC	26,089	$3.49M	0.0%	+15.6%	0.046%
11/13/2025	Marshall Wace LLP	181,063	$24.20M	0.0%	+115.1%	0.322%
11/13/2025	Entropy Technologies LP	2,783	$0.37M	0.0%	-74.2%	0.005%
11/13/2025	Johnson Financial Group Inc.	485	$65K	0.0%	N/A	0.001%
11/13/2025	Quantitative Investment Management LLC	2,010	$0.27M	0.0%	N/A	0.004%
11/13/2025	Pier Capital LLC	54,966	$7.35M	1.1%	-6.8%	0.098%
11/13/2025	Invesco Ltd.	873,040	$116.70M	0.0%	-36.7%	1.551%
11/13/2025	Sei Investments Co.	215,036	$28.74M	0.0%	-5.9%	0.382%
11/13/2025	UBS Group AG	456,929	$61.08M	0.0%	-73.9%	0.812%
11/13/2025	Geneva Capital Management LLC	596,768	$79.77M	1.4%	+22.4%	1.060%
11/13/2025	Blue Whale Capital LLP	243,101	$32.50M	1.8%	-15.5%	0.432%
11/13/2025	Quadrant Capital Group LLC	1,909	$0.26M	0.0%	N/A	0.003%
11/13/2025	Van ECK Associates Corp	39,747	$5.31M	0.0%	-8.6%	0.071%
11/13/2025	Legal & General Group Plc	83,798	$11.20M	0.0%	-2.8%	0.149%
11/13/2025	Swiss National Bank	103,400	$13.82M	0.0%	+1.5%	0.184%
11/13/2025	Russell Investments Group Ltd.	57,682	$7.71M	0.0%	-9.0%	0.102%
11/13/2025	Schroder Investment Management Group	460,609	$61.57M	0.0%	+123.2%	0.818%
11/13/2025	Diversify Advisory Services LLC	3,014	$0.40M	0.0%	+75.7%	0.005%
11/13/2025	Natixis Advisors LLC	38,329	$5.12M	0.0%	+35.4%	0.068%
11/13/2025	Angeles Wealth Management LLC	1,907	$0.26M	0.0%	+13.4%	0.003%
11/13/2025	Blair William & Co. IL	1,992	$0.27M	0.0%	-27.5%	0.004%
11/13/2025	First Trust Advisors LP	266,290	$35.60M	0.0%	+1.8%	0.473%
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%

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: $165.76

$161.67

$167.67

50 Day Range

MA: $153.07

$124.09

$171.76

52 Week Range

Now: $165.76

$102.96

$182.52

Volume

599,190 shs

Average Volume

796,665 shs

Market Capitalization

$9.33 billion

P/E Ratio

8,292.15

Dividend Yield

N/A

Beta

1.11

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%
United Capital Financial Advisors LLC — 4.90%
Holocene Advisors LP — 2.45%
Champlain Investment Partners LLC — 2.38%
Alliancebernstein L.P. — 1.96%
Conestoga Capital Advisors LLC — 1.70%
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:
UBS Group AG
Invesco Ltd.
Brown Capital Management LLC
Alyeska Investment Group L.P.
Bessemer Group Inc.
Two Sigma Investments LP
Raymond James Financial Inc.
UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC
During the last year, company insiders that have sold Repligen company stock include:
Anthony Hunt (CEO)
Anthony Hunt (Director)
Learn More investors selling Repligen stock.
Which institutional investors are buying Repligen stock?: During the previous quarter, RGEN stock was bought by institutional investors including:
United Capital Financial Advisors LLC
Balyasny Asset Management L.P.
Holocene Advisors LP
Vestal Point Capital LP
Iron Triangle Partners LP
Schroder Investment Management Group
Alliancebernstein L.P.
ABN Amro Investment Solutions
Within 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.