The Filings Report

Repligen Corp insider trading

RGENfinancial statementsForm 4 filings on EDGAR127 transactions since Nov 3, 2024

From August 6, 2026 to November 3, 2026, 0 insiders at Repligen Corp bought $0 of stock in the open market, and 1 sold $6M. Officers and directors accounted for $0 of purchases and $6M of sales. The last reported transaction was an award by Douglass Brian Robb on October 6, 2026.

The answer card and chart use the same period. Change the range above the chart to update both. Form 4 filings through October 8, 2026; awards, option exercises, tax withholding and gifts are excluded from these totals.

Stock price and insider activity

Daily price candles with insider purchases and sales directly beneath them on the same timeline. Bars show individual days; totals sum all days in the selected period.

RGEN daily priceSplit-adjusted prices in US dollars

Bought $0Sold $6MAug 6, 2026 – Nov 3, 2026

Nov 3, 2026O $175.54 · H $181.56 · L $173.00 · C $178.27Bought $0 (0)Sold $0 (0)
$154$166$177$189$2012026-08-06: open $156.21, high $162.37, low $156.09, close $159.442026-08-07: open $159.44, high $164.97, low $159.44, close $163.902026-08-10: open $163.06, high $166.43, low $160.99, close $163.172026-08-11: open $163.41, high $168.20, low $161.02, close $164.772026-08-12: open $165.21, high $166.96, low $162.36, close $165.702026-08-13: open $167.19, high $168.37, low $161.90, close $167.492026-08-14: open $167.49, high $168.02, low $165.05, close $166.832026-08-17: open $166.25, high $169.50, low $164.62, close $169.042026-08-18: open $168.01, high $168.03, low $164.83, close $166.152026-08-19: open $172.74, high $179.87, low $170.00, close $176.362026-08-20: open $174.61, high $188.73, low $173.14, close $180.292026-08-21: open $179.66, high $182.43, low $175.75, close $181.132026-08-24: open $180.60, high $183.05, low $176.28, close $181.622026-08-25: open $181.62, high $185.34, low $178.98, close $181.692026-08-26: open $180.11, high $183.43, low $179.47, close $180.302026-08-27: open $179.90, high $183.09, low $179.14, close $182.032026-08-28: open $179.76, high $181.35, low $175.70, close $176.272026-08-31: open $174.17, high $181.07, low $174.01, close $180.982026-09-01: open $180.70, high $182.57, low $167.42, close $170.022026-09-02: open $171.77, high $176.87, low $168.58, close $172.942026-09-03: open $175.53, high $176.13, low $167.54, close $169.612026-09-04: open $167.26, high $169.51, low $165.00, close $167.602026-09-08: open $168.05, high $172.95, low $166.32, close $168.532026-09-09: open $168.53, high $169.52, low $162.46, close $165.052026-09-10: open $162.68, high $165.04, low $161.14, close $164.682026-09-11: open $166.72, high $168.06, low $164.02, close $165.182026-09-14: open $166.74, high $168.42, low $162.10, close $168.002026-09-15: open $168.27, high $175.86, low $168.27, close $174.732026-09-16: open $174.90, high $178.55, low $171.66, close $172.912026-09-17: open $174.93, high $178.65, low $173.24, close $178.192026-09-18: open $179.10, high $179.10, low $176.29, close $176.892026-09-21: open $176.89, high $182.25, low $176.22, close $180.712026-09-22: open $180.72, high $188.20, low $180.00, close $186.752026-09-23: open $186.38, high $188.95, low $181.71, close $184.532026-09-24: open $184.10, high $192.49, low $183.75, close $190.652026-09-25: open $189.92, high $191.51, low $186.91, close $189.682026-09-28: open $187.25, high $198.87, low $187.11, close $194.092026-09-29: open $196.00, high $196.65, low $190.98, close $194.572026-09-30: open $193.09, high $195.61, low $190.97, close $192.232026-10-01: open $194.00, high $194.00, low $177.12, close $177.232026-10-02: open $179.32, high $186.52, low $178.00, close $181.702026-10-05: open $178.75, high $191.26, low $178.61, close $189.502026-10-06: open $191.90, high $194.36, low $174.36, close $174.862026-10-07: open $174.75, high $175.04, low $165.99, close $167.222026-10-08: open $164.00, high $164.65, low $157.44, close $163.842026-10-09: open $164.21, high $174.82, low $164.21, close $173.882026-10-12: open $171.73, high $173.82, low $169.90, close $172.512026-10-13: open $172.51, high $177.96, low $169.73, close $175.422026-10-14: open $175.42, high $181.07, low $175.39, close $178.202026-10-15: open $178.28, high $185.99, low $177.49, close $184.172026-10-16: open $183.81, high $186.00, low $172.39, close $175.422026-10-19: open $177.82, high $178.66, low $174.26, close $176.432026-10-20: open $176.50, high $180.67, low $174.37, close $178.882026-10-21: open $174.37, high $183.49, low $172.00, close $180.012026-10-22: open $179.45, high $185.03, low $175.96, close $178.712026-10-23: open $178.30, high $179.54, low $174.90, close $176.932026-10-26: open $176.93, high $181.46, low $175.80, close $180.172026-10-27: open $168.34, high $180.00, low $164.88, close $175.802026-10-28: open $173.54, high $185.88, low $173.54, close $184.692026-10-29: open $188.42, high $191.05, low $185.28, close $188.642026-10-30: open $177.44, high $180.45, low $171.23, close $176.942026-11-02: open $178.12, high $178.12, low $172.51, close $172.952026-11-03: open $175.54, high $181.56, low $173.00, close $178.27Insider purchases / sales · USD$5M$0−$5M2026-08-20: 0 purchases ($0), 1 sales ($977K)2026-09-04: 0 purchases ($0), 1 sales ($504K)2026-09-21: 0 purchases ($0), 1 sales ($977K)2026-09-24: 0 purchases ($0), 2 sales ($2M)2026-10-05: 0 purchases ($0), 2 sales ($1M)Aug 6Aug 28Sep 21Oct 13Nov 3

purchases above zero; sales below. Both use the transaction date and the same dollar scale. Hover, tap, or use arrow keys to inspect a date. Awards, exercises, tax withholding and gifts are excluded.

Dates with prices or insider activity are spaced evenly; empty weekends and holidays are omitted. Prices through Nov 3, 2026. Insider data through Nov 3, 2026. Prices are adjusted for splits; transaction values are reported dollars.

Every transaction

127 transactions from November 3, 2024 to November 3, 2026, newest first. Open-market purchases and sales are coloured; awards, exercises, tax withholding and gifts are grey and not counted.

TradedInsiderRoleTransactionSharesPriceValueHeld afterFiled
Oct 6, 2026Douglass Brian RobbCHIEF PRODUCT OFFICERaward700$0.00—8,685Oct 8, 2026
Oct 5, 2026Loeillot OlivierChief Executive Officer, Directoropen-market sale10b5-11,333$178.75$238K45,788Oct 6, 2026
Oct 5, 2026Loeillot OlivierChief Executive Officer, Directoroption exercise4,202$154.96$651K49,990Oct 6, 2026
Oct 5, 2026Loeillot OlivierChief Executive Officer, Directoropen-market sale10b5-14,202$190.00$798K45,788Oct 6, 2026
Oct 2, 2026Loeillot OlivierChief Executive Officer, Directortax withholding1,248$181.70$227K47,121Oct 5, 2026
Sep 25, 2026Garland Jason KCFOtax withholding421$189.68$80K18,408Sep 28, 2026
Sep 24, 2026Loeillot OlivierChief Executive Officer, Directoroption exercise8,404$154.96$1M56,773Sep 25, 2026
Sep 24, 2026Loeillot OlivierChief Executive Officer, Directoropen-market sale10b5-18,404$190.00$2M48,369Sep 25, 2026
Sep 24, 2026Loeillot OlivierChief Executive Officer, Directoroption exercise4,542$155.38$706K52,911Sep 25, 2026
Sep 24, 2026Loeillot OlivierChief Executive Officer, Directoropen-market sale10b5-14,542$190.00$863K48,369Sep 25, 2026
Sep 21, 2026Loeillot OlivierChief Executive Officer, Directoroption exercise5,426$141.79$769K53,795Sep 22, 2026
Sep 21, 2026Loeillot OlivierChief Executive Officer, Directoropen-market sale10b5-15,426$180.00$977K48,369Sep 22, 2026
Sep 4, 2026Loeillot OlivierChief Executive Officer, Directoropen-market sale10b5-13,035$165.90$504K48,369Sep 8, 2026
Sep 3, 2026Loeillot OlivierChief Executive Officer, Directortax withholding2,842$169.61$482K51,404Sep 8, 2026
Sep 1, 2026Hughes ViolettaCHIEF ACCOUNTING OFFICERtax withholding277$170.02$47K6,331Sep 2, 2026
Aug 20, 2026Loeillot OlivierChief Executive Officer, Directoroption exercise5,426$141.79$769K59,672Aug 21, 2026
Aug 20, 2026Loeillot OlivierChief Executive Officer, Directoropen-market sale10b5-15,426$180.00$977K54,246Aug 21, 2026
Jul 16, 2026Garland Jason KCFOopen-market sale10b5-1530$150.00$80K18,829Jul 17, 2026
Jun 25, 2026Garland Jason KCFOopen-market sale10b5-1733$145.00$106K19,359Jun 26, 2026
May 14, 2026Madaus Martin DDirectoraward995$0.00—6,581May 18, 2026
May 14, 2026Konstantinov KonstantinDirectoraward995$0.00—3,889May 18, 2026
May 14, 2026Eglinton Manner CarrieDirectoraward995$0.00—5,461May 18, 2026
May 14, 2026Mhatre RohinDirectoraward995$0.00—5,014May 18, 2026
May 14, 2026Pax MargaretDirectoraward995$0.00—3,011May 18, 2026
May 14, 2026Muir Glenn PDirectoraward995$0.00—40,051May 18, 2026
May 14, 2026Dawes Karen ADirectoraward995$0.00—92,816May 18, 2026
May 14, 2026Barthelemy NicolasDirectoraward995$0.00—5,436May 18, 2026
May 7, 2026Muir Glenn PDirectoroption exercise2,434$38.76$94K39,056May 8, 2026
May 7, 2026Douglass Brian RobbCHIEF PRODUCT OFFICERtax withholding334$126.43$42K7,985May 8, 2026
Apr 21, 2026Loeillot OlivierChief Executive Officer, Directoropen-market sale10b5-13,832$140.00$536K54,246Apr 22, 2026
Mar 5, 2026Hughes ViolettaCHIEF ACCOUNTING OFFICERaward2,466$0.00—6,608Sep 2, 2026
Mar 5, 2026Kuriyel RalfSenior VP, R&Daward5,284$0.00—20,062Mar 23, 2026
Mar 5, 2026Loeillot OlivierChief Executive Officeraward24,134$0.00—58,078Mar 23, 2026
Mar 5, 2026Bylund JamesChief Operating Officeraward7,751$0.00—25,423Mar 23, 2026
Mar 5, 2026Garland Jason KCFOaward7,751$0.00—20,092Mar 23, 2026
Mar 4, 2026Bylund JamesChief Operating Officeraward125$0.00—17,734Mar 5, 2026
Mar 4, 2026Bylund JamesChief Operating Officertax withholding62$125.84$8K17,672Mar 5, 2026
Mar 4, 2026Kuriyel RalfSenior VP, R&Daward125$0.00—14,820Mar 5, 2026
Mar 4, 2026Kuriyel RalfSenior VP, R&Dtax withholding42$125.84$5K14,778Mar 5, 2026
Mar 2, 2026Bylund JamesChief Operating Officertax withholding2,433$124.97$304K17,609Mar 3, 2026
Mar 2, 2026Loeillot OlivierChief Executive Officer, Directortax withholding1,610$124.97$201K33,944Mar 3, 2026
Mar 2, 2026Hunt AnthonyDirectortax withholding9,897$124.97$1M89,062Mar 3, 2026
Mar 2, 2026Garland Jason KCFOtax withholding715$124.97$89K12,341Mar 3, 2026
Mar 2, 2026Kuriyel RalfSenior VP, R&Dtax withholding923$124.97$115K14,695Mar 3, 2026
Mar 2, 2026Douglass Brian RobbCHIEF PRODUCT OFFICERtax withholding221$124.97$28K8,319Mar 3, 2026
Feb 27, 2026Bylund JamesChief Operating Officertax withholding1,478$128.73$190K20,042Mar 3, 2026
Feb 27, 2026Loeillot OlivierChief Executive Officer, Directortax withholding344$128.73$44K35,554Mar 3, 2026
Feb 27, 2026Garland Jason KCFOtax withholding327$128.73$42K13,056Mar 3, 2026
Feb 27, 2026Kuriyel RalfSenior VP, R&Dtax withholding444$128.73$57K15,618Mar 3, 2026
Dec 31, 2025Douglass Brian RobbCHIEF PRODUCT OFFICERaward2,288$0.00—8,540Jan 12, 2026

Who the insiders are

Everyone who reported a transaction since November 3, 2024, by open-market value over twelve months. Shares held are after the insider’s latest directly held transaction.

InsiderRoleLast transactionKindShares heldBought, 12 monthsSold, 12 monthsSales under a plan
Loeillot OlivierChief Executive Officer, DirectorOct 5, 2026open-market sale45,788—$8M (9)9 of 9
Hunt AnthonyDirectorMar 2, 2026tax withholding89,062—$7M (12)5 of 12
Bylund JamesChief Operating OfficerMar 5, 2026award25,423—$331K (1)0 of 1
Garland Jason KCFOSep 25, 2026tax withholding18,408—$186K (2)2 of 2
Dawes Karen ADirectorMay 14, 2026award92,816—$44K (1)0 of 1
Kuriyel RalfSenior VP, R&DMar 5, 2026award20,062———
Muir Glenn PDirectorMay 14, 2026award40,051———
Douglass Brian RobbCHIEF PRODUCT OFFICEROct 6, 2026award8,685———
Hughes ViolettaCHIEF ACCOUNTING OFFICERSep 1, 2026tax withholding6,331———
Madaus Martin DDirectorMay 14, 2026award6,581———
Pax MargaretDirectorMay 14, 2026award3,011———
Konstantinov KonstantinDirectorMay 14, 2026award3,889———
Eglinton Manner CarrieDirectorMay 14, 2026award5,461———
Mhatre RohinDirectorMay 14, 2026award5,014———
Barthelemy NicolasDirectorMay 14, 2026award5,436———

Questions

Are Repligen Corp insiders buying or selling?

Over the twelve months to November 3, 2026, 5 insiders at Repligen Corp sold $15M of stock in the open market, all by officers and directors, and no insider bought. Net, insiders sold $15M. Only open-market purchases and sales are counted.

Who sold the most Repligen Corp stock in the last year?

Loeillot Olivier (Chief Executive Officer, Director) sold $8M in 9 open-market sales over the twelve months to November 3, 2026.

Do Repligen Corp executives sell under 10b5-1 plans?

16 of the 25 open-market sales in the last twelve months (64%) were reported as made under a Rule 10b5-1 trading plan, set up in advance. A sale under a plan is still counted as a sale.

What counts as insider buying here?

Only open-market purchases (Form 4 code P) and sales (code S) by officers, directors and 10% owners. Stock awards, option exercises, shares withheld for tax and gifts are listed in the table but never counted as buying or selling.

More on Repligen Corp

From Form 4, 4/A and 5 filings with the SEC. A record of insider transactions, not a recommendation.