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RGEN Insider Trading

Insider Ownership Percentage: 1.20%
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: $114.32
Price Change: ▼ Price Decrease of -1.98 (-1.70%)
As of 03/25/2026 05:00 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  
5/8/2023Martin D. MadausDirectorBuy500$156.18$78,090.001,611View SEC Filing Icon  
5/4/2023Martin D. MadausDirectorBuy500$161.15$80,575.00611View 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
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
2/13/2026UMB Bank n.a.758$0.12M0.0%+13.8%0.001%Search for SEC Filing on Google Icon
2/13/2026Stifel Financial Corp20,991$3.44M0.0%+46.7%0.037%Search for SEC Filing on Google Icon
2/13/2026Hudson Bay Capital Management LP20,000$3.28M0.0%-4.8%0.036%Search for SEC Filing on Google Icon
2/13/2026Smartleaf Asset Management LLC1,327$0.22M0.0%+15.2%0.002%Search for SEC Filing on Google Icon
2/13/2026Bank of Nova Scotia44,477$7.29M0.0%+9.4%0.079%Search for SEC Filing on Google Icon
2/13/2026Schroder Investment Management Group443,934$72.74M0.1%-3.6%0.789%Search for SEC Filing on Google Icon
2/13/2026First Trust Advisors LP282,776$46.34M0.0%+6.2%0.502%Search for SEC Filing on Google Icon
2/13/2026Itau Unibanco Holding S.A.378$62K0.0%+38.0%0.001%Search for SEC Filing on Google Icon
2/13/2026Champlain Investment Partners LLC1,003,951$164.51M1.7%-25.0%1.784%Search for SEC Filing on Google Icon
2/13/2026Blue Whale Capital LLP308,467$50.55M2.6%+26.9%0.548%Search for SEC Filing on Google Icon
2/13/2026Charles Schwab Investment Management Inc.430,704$70.58M0.0%+2.0%0.765%Search for SEC Filing on Google Icon
2/13/2026Police & Firemen s Retirement System of New Jersey22,249$3.65M0.0%-5.0%0.040%Search for SEC Filing on Google Icon
2/13/2026Van ECK Associates Corp36,516$5.98M0.0%-8.1%0.065%Search for SEC Filing on Google Icon
2/13/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC164,354$26.93M0.0%-0.1%0.292%Search for SEC Filing on Google Icon
2/13/2026Lord Abbett & CO. LLC90,244$14.79M0.0%N/A0.160%Search for SEC Filing on Google Icon
2/13/2026Wealthspire Advisors LLC1,600$0.26M0.0%+1,169.8%0.003%Search for SEC Filing on Google Icon
2/13/2026Quadrant Capital Group LLC2,956$0.48M0.0%+54.8%0.005%Search for SEC Filing on Google Icon
2/12/2026Advisors Asset Management Inc.4,251$0.70M0.0%-50.6%0.008%Search for SEC Filing on Google Icon
2/12/2026Federation des caisses Desjardins du Quebec4,113$0.67M0.0%+17.2%0.007%Search for SEC Filing on Google Icon
2/12/2026Brooklyn Investment Group1,796$0.30M0.0%N/A0.003%Search for SEC Filing on Google Icon
2/12/2026Orion Porfolio Solutions LLC1,409$0.23M0.0%N/A0.003%Search for SEC Filing on Google Icon
2/12/2026MetLife Investment Management LLC26,166$4.29M0.0%-4.8%0.046%Search for SEC Filing on Google Icon
2/12/2026State Board of Administration of Florida Retirement System49,243$8.07M0.0%-5.8%0.087%Search for SEC Filing on Google Icon
2/12/2026Dimensional Fund Advisors LP804,410$131.82M0.0%+0.6%1.429%Search for SEC Filing on Google Icon
2/12/2026Federated Hermes Inc.4,255$0.70M0.0%-9.9%0.008%Search for SEC Filing on Google Icon
2/12/2026Ensign Peak Advisors Inc101,209$16.58M0.0%-12.6%0.180%Search for SEC Filing on Google Icon
2/12/2026Granite Investment Partners LLC2,940$0.48M0.0%-73.5%0.005%Search for SEC Filing on Google Icon
2/12/2026NZS Capital LLC198,803$32.58M1.0%+1.0%0.353%Search for SEC Filing on Google Icon
2/12/2026Geneva Capital Management LLC562,975$92.25M1.7%-5.7%1.000%Search for SEC Filing on Google Icon
2/12/2026Bank of Montreal Can18,460$3.03M0.0%-18.7%0.033%Search for SEC Filing on Google Icon
2/12/2026Loomis Sayles & Co. L P149,777$24.54M0.0%-10.9%0.266%Search for SEC Filing on Google Icon
2/12/2026South Dakota Investment Council1,500$0.25M0.0%-11.8%0.003%Search for SEC Filing on Google Icon
2/12/2026Swiss National Bank105,400$17.27M0.0%+1.9%0.187%Search for SEC Filing on Google Icon
2/12/2026Nuveen LLC192,688$31.57M0.0%-95.3%0.342%Search for SEC Filing on Google Icon
2/12/2026Xponance LLC5,601$0.92M0.0%-15.1%0.010%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: $114.32
Low: $111.92
High: $119.90

50 Day Range

MA: $137.20
Low: $113.76
High: $169.97

52 Week Range

Now: $114.32
Low: $102.96
High: $175.77

Volume

1,479,695 shs

Average Volume

825,833 shs

Market Capitalization

$6.44 billion

P/E Ratio

134.49

Dividend Yield

N/A

Beta

1.14

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

Repligen's top insider investors include:
  1. Anthony Hunt (CEO)
  2. Anthony Hunt (Director)
  3. Karen A Dawes (Director)
  4. James Bylund (COO)
  5. Ralf Kuriyel (VP)
  6. Martin D Madaus (Director)
  7. 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:
  1. Vanguard Group Inc. — 8.87%
  2. Price T Rowe Associates Inc. MD — 8.17%
  3. Opti Capital Management LP — 3.87%
  4. Invesco Ltd. — 2.23%
  5. Massachusetts Financial Services Co. MA — 2.16%
  6. RTW Investments LP — 1.89%
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. Lazard Asset Management LLC
  2. Nuveen LLC
  3. Balyasny Asset Management L.P.
  4. T. Rowe Price Investment Management Inc.
  5. Brown Capital Management LLC
  6. Champlain Investment Partners LLC
  7. Vestal Point Capital LP
  8. Impax Asset Management Group plc
During the last year, company insiders that have sold Repligen company stock include:
  1. Anthony Hunt (CEO)
  2. Anthony Hunt (Director)
  3. Karen A Dawes (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:
  1. Opti Capital Management LP
  2. Massachusetts Financial Services Co. MA
  3. Price T Rowe Associates Inc. MD
  4. RTW Investments LP
  5. Fred Alger Management LLC
  6. Congress Asset Management Co.
  7. Norges Bank
  8. Invesco Ltd.
Within the previous year, these company insiders have bought Repligen stock:
  1. Anthony Hunt (CEO)
  2. Anthony Hunt (Director)
  3. Karen A Dawes (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