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RGEN Insider Trading

Insider Ownership Percentage: 0.60%
Insider Buying (Last 12 Months): $201,834.00
Insider Selling (Last 12 Months): $7,721,077.22

Repligen Insider Trading History Chart

This chart shows the insider buying and selling history at Repligen by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

Repligen Share Price & Price History

Current Price: $123.46
Price Change: ▼ Price Decrease of -2.97 (-2.35%)
As of 05/8/2026 04:00 PM ET

This chart shows the closing price history over time for RGEN up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

Repligen Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
12/17/2025Karen A. DawesDirectorSell275$161.00$44,275.0091,821View SEC Filing Icon  
11/18/2025James BylundCOOSell2,191$151.21$331,301.1121,520View SEC Filing Icon  
11/18/2025James BylundCOOSell2,191$151.21$331,301.1121,520View SEC Filing Icon  
11/13/2025Anthony HuntDirectorSell20,000$154.61$3,092,200.0080,743View SEC Filing Icon  
11/12/2025Anthony HuntDirectorSell25,000$156.88$3,922,000.00100,743View SEC Filing Icon  
8/8/2025Martin D. MadausDirectorBuy1,800$112.13$201,834.001,800View SEC Filing Icon  
3/17/2025Margaret PaxDirectorBuy250$150.69$37,672.501,043View SEC Filing Icon  
9/10/2024Anthony HuntDirectorSell22,191$145.37$3,225,905.67139,840View SEC Filing Icon  
8/1/2024Ralf KuriyelVPSell4,465$165.67$739,716.5519,261View SEC Filing Icon  
6/14/2024Anthony HuntCEOBuy2,000$124.08$248,160.00165,177View SEC Filing Icon  
6/14/2024Martin D. MadausDirectorBuy1,615$124.94$201,778.104,613View SEC Filing Icon  
5/21/2024Anthony HuntCEOSell20,072$168.26$3,377,314.72163,177View SEC Filing Icon  
3/11/2024Ralf KuriyelVPSell3,517$193.73$681,348.4124,260View SEC Filing Icon  
3/8/2024Anthony HuntCEOSell16,707$197.44$3,298,630.08185,249View SEC Filing Icon  
2/27/2024Karen A. DawesDirectorSell1,000$193.35$193,350.0087,367View SEC Filing Icon  
2/23/2024James BylundCOOSell4,373$198.08$866,203.8414,135View SEC Filing Icon  
11/10/2023Christine GebskiInsiderSell3,788$147.13$557,328.4428,787View SEC Filing Icon  
8/29/2023Karen A. DawesDirectorSell850$171.38$145,673.0083,741View SEC Filing Icon  
See Full Table

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

This chart shows the instiutional buying and selling at RGEN by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Repligen Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/8/2026PNC Financial Services Group Inc.7,271$0.86M0.0%+62.9%0.013%Search for SEC Filing on Google Icon
5/7/2026Dimensional Fund Advisors LP854,741$100.68M0.0%+6.3%1.516%Search for SEC Filing on Google Icon
5/7/2026KBC Group NV1,837$0.22M0.0%+20.7%0.003%Search for SEC Filing on Google Icon
5/7/2026Swiss National Bank105,800$12.47M0.0%+0.4%0.188%Search for SEC Filing on Google Icon
5/7/2026Roubaix Capital LLC54,555$6.43M3.0%N/A0.097%Search for SEC Filing on Google Icon
5/6/2026Jennison Associates LLC121,239$14.28M0.0%-1.9%0.215%Search for SEC Filing on Google Icon
5/6/2026California Public Employees Retirement System66,759$7.87M0.0%-4.8%0.118%Search for SEC Filing on Google Icon
5/6/2026Angeles Wealth Management LLC2,587$0.31M0.0%+27.3%0.005%Search for SEC Filing on Google Icon
5/6/2026Bessemer Group Inc.1,943$0.23M0.0%-80.9%0.003%Search for SEC Filing on Google Icon
5/6/2026Jag Capital Management LLC1,936$0.23M0.0%+43.8%0.003%Search for SEC Filing on Google Icon
5/6/2026Allspring Global Investments Holdings LLC280,523$33.19M0.1%-9.9%0.497%Search for SEC Filing on Google Icon
5/4/2026State of Michigan Retirement System12,753$1.50M0.0%+1.6%0.023%Search for SEC Filing on Google Icon
5/4/2026Principal Financial Group Inc.159,745$18.82M0.0%-19.4%0.283%Search for SEC Filing on Google Icon
5/4/2026Teachers Retirement System of The State of Kentucky100,045$11.79M0.1%-1.9%0.177%Search for SEC Filing on Google Icon
5/2/2026Diversify Wealth Management LLC13,616$1.54M0.0%+56.8%0.024%Search for SEC Filing on Google Icon
5/1/2026Kornitzer Capital Management Inc. KS70,080$8.26M0.2%-16.4%0.124%Search for SEC Filing on Google Icon
4/30/2026Hsbc Holdings PLC19,772$2.31M0.0%+844.7%0.035%Search for SEC Filing on Google Icon
4/30/2026Azzad Asset Management Inc. ADV3,186$0.38M0.0%-3.9%0.006%Search for SEC Filing on Google Icon
4/30/2026Granite Investment Partners LLC4,001$0.47M0.0%+36.1%0.007%Search for SEC Filing on Google Icon
4/30/2026Oregon Public Employees Retirement Fund10,841$1.28M0.0%+2.8%0.019%Search for SEC Filing on Google Icon
4/28/2026Stephens Inc. AR48,376$5.70M0.1%+3.0%0.086%Search for SEC Filing on Google Icon
4/28/2026Stephens Investment Management Group LLC755,571$89.02M1.2%+15.0%1.340%Search for SEC Filing on Google Icon
4/27/2026New York State Teachers Retirement System49,318$5.81M0.0%-3.4%0.087%Search for SEC Filing on Google Icon
4/25/2026Strs Ohio54,760$6.45M0.0%+8.9%0.097%Search for SEC Filing on Google Icon
4/24/2026Conestoga Capital Advisors LLC1,097,783$129.34M2.6%+3.8%1.946%Search for SEC Filing on Google Icon
4/22/2026Pictet Asset Management Holding SA8,449$1M0.0%+12.0%0.015%Search for SEC Filing on Google Icon
4/22/2026Sterling Capital Management LLC1,596$0.19M0.0%-42.5%0.003%Search for SEC Filing on Google Icon
4/21/2026Wasatch Advisors LP1,243,531$146.51M1.0%N/A2.205%Search for SEC Filing on Google Icon
4/21/2026Louisiana State Employees Retirement System15,300$1.80M0.0%N/A0.027%Search for SEC Filing on Google Icon
4/18/2026Riverbridge Partners LLC258,476$30.45M0.7%-17.5%0.458%Search for SEC Filing on Google Icon
4/17/2026Krilogy Financial LLC19,557$2.49M0.1%+81.8%0.035%Search for SEC Filing on Google Icon
4/17/2026Generate Investment Management Ltd41,521$4.89M0.2%N/A0.074%Search for SEC Filing on Google Icon
4/16/2026SG Americas Securities LLC5,644$0.67M0.0%-62.1%0.010%Search for SEC Filing on Google Icon
4/16/2026E. Ohman J or Asset Management AB28,600$3.37M0.1%-15.1%0.051%Search for SEC Filing on Google Icon
4/16/2026Diversified Trust Co10,151$1.20M0.0%-23.9%0.018%Search for SEC Filing on Google Icon
3/20/2026Hsbc Holdings PLC2,093$0.34M0.0%-8.8%0.004%Search for SEC Filing on Google Icon
3/17/2026Rockefeller Capital Management L.P.579$95K0.0%+201.6%0.001%Search for SEC Filing on Google Icon
3/9/2026Corient Private Wealth LLC3,396$0.56M0.0%-21.0%0.006%Search for SEC Filing on Google Icon
2/25/2026MidFirst Bank1,823$0.30M0.0%N/A0.003%Search for SEC Filing on Google Icon
2/24/2026Pacer Advisors Inc.10,469$1.72M0.0%+2.5%0.019%Search for SEC Filing on Google Icon
2/19/2026T. Rowe Price Investment Management Inc.646,122$105.87M0.1%+12.9%1.148%Search for SEC Filing on Google Icon
2/19/2026Compound Planning Inc.1,243$0.20M0.0%N/A0.002%Search for SEC Filing on Google Icon
2/19/2026Invesco Ltd.1,256,439$205.88M0.0%+43.9%2.232%Search for SEC Filing on Google Icon
2/19/2026Corient Private Wealth LLC1,549$0.26M0.0%-64.0%0.003%Search for SEC Filing on Google Icon
2/18/2026Alpine Woods Capital Investors LLC6,136$1.01M0.2%N/A0.011%Search for SEC Filing on Google Icon
2/18/2026Mercer Global Advisors Inc. ADV1,242$0.20M0.0%N/A0.002%Search for SEC Filing on Google Icon
2/18/2026State of Tennessee Department of Treasury23,158$3.46M0.0%-26.3%0.041%Search for SEC Filing on Google Icon
2/18/2026Empowered Funds LLC1,275$0.21M0.0%N/A0.002%Search for SEC Filing on Google Icon
2/18/2026XTX Topco Ltd5,148$0.84M0.0%N/A0.009%Search for SEC Filing on Google Icon
2/18/2026Kensington Investment Counsel LLC5,241$0.86M0.3%-35.2%0.009%Search for SEC Filing on Google Icon
2/18/2026Vestal Point Capital LP83,000$13.60M0.5%-79.3%0.147%Search for SEC Filing on Google Icon
2/18/2026RTW Investments LP1,064,000$174.35M1.7%N/A1.890%Search for SEC Filing on Google Icon
2/18/2026Osterweis Capital Management Inc.54,635$8.95M0.4%-25.1%0.097%Search for SEC Filing on Google Icon
2/18/2026Opti Capital Management LP2,181,000$2.40B0.2%N/A3.875%Search for SEC Filing on Google Icon
2/18/2026Perceptive Advisors LLC315,541$51.71M0.9%+16.7%0.561%Search for SEC Filing on Google Icon
2/18/2026Moore Capital Management LP150,000$24.58M0.4%-2.0%0.266%Search for SEC Filing on Google Icon
2/18/2026Janus Henderson Group PLC24,316$3.99M0.0%+6.6%0.043%Search for SEC Filing on Google Icon
2/18/2026Gotham Asset Management LLC50,531$8.28M0.0%+16.9%0.090%Search for SEC Filing on Google Icon
2/18/2026Cinctive Capital Management LP7,638$1.25M0.1%-70.0%0.014%Search for SEC Filing on Google Icon
2/18/2026Balyasny Asset Management L.P.115,053$18.85M0.0%-85.0%0.204%Search for SEC Filing on Google Icon
2/18/2026Bamco Inc. NY544,779$89.27M0.2%+42.7%0.968%Search for SEC Filing on Google Icon
2/17/2026Guggenheim Capital LLC1,564$0.26M0.0%N/A0.003%Search for SEC Filing on Google Icon
2/17/2026American Capital Management Inc.335,115$54.91M2.4%-0.5%0.595%Search for SEC Filing on Google Icon
2/17/2026Brown Capital Management LLC273,972$44.89M3.7%-59.0%0.487%Search for SEC Filing on Google Icon
2/17/2026AQR Capital Management LLC8,648$1.42M0.0%-6.2%0.015%Search for SEC Filing on Google Icon
2/17/2026EFG International AG35,279$5.78M0.1%N/A0.063%Search for SEC Filing on Google Icon
2/17/2026Lazard Asset Management LLC2,148$0.35M0.0%-100.0%0.004%Search for SEC Filing on Google Icon
2/17/2026DF Dent & Co. Inc.495,550$81.20M1.2%-7.3%0.880%Search for SEC Filing on Google Icon
2/17/2026Amundi42,034$6.89M0.0%+808.8%0.075%Search for SEC Filing on Google Icon
2/17/2026Iron Triangle Partners LP320,474$52.51M6.0%+18.7%0.569%Search for SEC Filing on Google Icon
2/17/2026Price T Rowe Associates Inc. MD4,599,061$753.60M0.1%+31.1%8.170%Search for SEC Filing on Google Icon
2/17/2026T. Rowe Price Investment Management Inc.43,388$7.11M0.0%-92.4%0.077%Search for SEC Filing on Google Icon
2/17/2026Osaic Holdings Inc.89,978$14.74M0.0%+148.7%0.160%Search for SEC Filing on Google Icon
2/17/2026Public Employees Retirement System of Ohio45,162$7.40M0.0%-13.0%0.080%Search for SEC Filing on Google Icon
2/17/2026California State Teachers Retirement System50,654$8.30M0.0%+1.6%0.090%Search for SEC Filing on Google Icon
2/17/2026Russell Investments Group Ltd.58,880$9.65M0.0%+2.1%0.105%Search for SEC Filing on Google Icon
2/17/2026Granahan Investment Management LLC72,002$11.80M0.5%+3.0%0.128%Search for SEC Filing on Google Icon
2/17/2026Captrust Financial Advisors9,367$1.54M0.0%+20.0%0.017%Search for SEC Filing on Google Icon
2/17/2026Artisan Partners Limited Partnership193,697$31.74M0.0%-9.0%0.344%Search for SEC Filing on Google Icon
2/17/2026Fred Alger Management LLC911,527$149.36M0.6%+154.3%1.619%Search for SEC Filing on Google Icon
2/17/2026&PARTNERS1,445$0.24M0.0%N/A0.003%Search for SEC Filing on Google Icon
2/17/2026Graham Capital Management L.P.3,908$0.64M0.0%+55.1%0.007%Search for SEC Filing on Google Icon
2/17/2026Polar Capital Holdings Plc1,230$0.20M0.0%N/A0.002%Search for SEC Filing on Google Icon
2/17/2026Rice Hall James & Associates LLC20,544$3.37M0.2%+7.3%0.036%Search for SEC Filing on Google Icon
2/16/2026Thornburg Investment Management Inc.46,488$7.62M0.1%-2.7%0.083%Search for SEC Filing on Google Icon
2/16/2026Vanguard Personalized Indexing Management LLC5,763$0.94M0.0%+13.1%0.010%Search for SEC Filing on Google Icon
2/16/2026Seven Mile Advisory1,381$0.23M0.0%N/A0.002%Search for SEC Filing on Google Icon
2/16/2026MML Investors Services LLC6,172$1.01M0.0%+55.9%0.011%Search for SEC Filing on Google Icon
2/16/2026Nicolet Advisory Services LLC3,770$0.64M0.0%-27.2%0.007%Search for SEC Filing on Google Icon
2/16/2026Glen Eagle Advisors LLC8,287$1.36M0.2%-20.9%0.015%Search for SEC Filing on Google Icon
2/16/2026LRT Capital Management LLC9,709$1.59M1.4%-50.5%0.017%Search for SEC Filing on Google Icon
2/16/2026Entropy Technologies LP5,493$0.90M0.0%+97.4%0.010%Search for SEC Filing on Google Icon
2/16/2026Avidity Partners Management LP50,300$8.24M2.4%+115.9%0.089%Search for SEC Filing on Google Icon
2/13/2026Kestra Advisory Services LLC915$0.15M0.0%N/A0.002%Search for SEC Filing on Google Icon
2/13/2026Marshall Wace LLP516,336$84.61M0.1%+185.2%0.917%Search for SEC Filing on Google Icon
2/13/2026The Manufacturers Life Insurance Company 57,102$9.41M0.0%+19.4%0.101%Search for SEC Filing on Google Icon
2/13/2026Johnson Investment Counsel Inc.18,487$3.03M0.0%+16.8%0.033%Search for SEC Filing on Google Icon
2/13/2026CANADA LIFE ASSURANCE Co30,773$5.04M0.0%-15.9%0.055%Search for SEC Filing on Google Icon
2/13/2026Segall Bryant & Hamill LLC146,980$24.08M0.3%+5.5%0.261%Search for SEC Filing on Google Icon
2/13/2026Bridgewater Associates LP7,874$1.29M0.0%-76.6%0.014%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
Repligen logo
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.
Read More on Repligen

Today's Range

Now: $123.46
Low: $121.26
High: $126.83

50 Day Range

MA: $121.00
Low: $110.12
High: $133.65

52 Week Range

Now: $123.46
Low: $109.50
High: $175.77

Volume

995,229 shs

Average Volume

1,121,953 shs

Market Capitalization

$6.96 billion

P/E Ratio

137.18

Dividend Yield

N/A

Beta

1.09

Who are the company insiders with the largest holdings of Repligen?

Repligen's top insider investors include:
  1. Roy T Eddleman (Major Shareholder)
  2. Anthony Hunt (CEO)
  3. Anthony Hunt (Director)
  4. Karen A Dawes (Director)
  5. Karen A Dawes (Director)
  6. Jon Snodgres (CFO)
  7. Christine Gebski (Insider)
  8. Howard Benjamin (VP)
  9. Glenn L Md Cooper (Director)
  10. Ralf Kuriyel (VP)
Learn More about top insider investors at Repligen.

Who are the major institutional investors of Repligen?

Repligen's top institutional shareholders include:
  1. Wasatch Advisors LP — 2.20%
  2. Conestoga Capital Advisors LLC — 1.95%
  3. Dimensional Fund Advisors LP — 1.52%
  4. Stephens Investment Management Group LLC — 1.34%
  5. Allspring Global Investments Holdings LLC — 0.50%
  6. Riverbridge Partners LLC — 0.46%
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:
  1. Riverbridge Partners LLC
  2. Principal Financial Group Inc.
  3. Allspring Global Investments Holdings LLC
  4. Kornitzer Capital Management Inc. KS
  5. SG Americas Securities LLC
  6. Bessemer Group Inc.
  7. E. Ohman J or Asset Management AB
  8. California Public Employees Retirement System
During the last year, company insiders that have sold Repligen company stock include:
  1. Anthony Hunt (Director)
  2. Karen A Dawes (Director)
  3. James Bylund (COO)
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:
  1. Wasatch Advisors LP
  2. Stephens Investment Management Group LLC
  3. Roubaix Capital LLC
  4. Dimensional Fund Advisors LP
  5. Generate Investment Management Ltd
  6. Conestoga Capital Advisors LLC
  7. Hsbc Holdings PLC
  8. Louisiana State Employees Retirement System
Within the previous year, these company insiders have bought Repligen stock:
  1. Anthony Hunt (CEO)
  2. Martin D Madaus (Director)
  3. Margaret Pax (Director)
Learn More investors buying Repligen stock.

Repligen Active Insiders

Jon Snodgres
Jon Snodgres (Age 60)
CFO
Karen A Dawes
Karen A Dawes
Director
1 recent trades
Thomas F Ryan Jr
Thomas F Ryan Jr
Director
Nicolas Barthelemy
Nicolas Barthelemy
Director
Manner Carrie Eglinton
Manner Carrie Eglinton
Director
Martin D Madaus
Martin D Madaus
Director
Margaret Pax
Margaret Pax
Director
James Bylund
James Bylund (Age 62)
SVP
2 recent trades
Ralf Kuriyel
Ralf Kuriyel (Age 67)
VP
Anthony Hunt
Anthony Hunt (Age 62)
Executive Chair
2 recent trades
Christine Gebski
Christine Gebski
Insider