Insider txns (12m)
92
Stock / equity
RGEN REPLIGEN CORP
- Company
- REPLIGEN CORP
- Security
- Equity
- Size, estimated from filings
- Large cap ($10B – $200B)
- Insiders on record
- 15
- Members of Congress
- 1
- Latest trade on record
- October 6, 2026
RGEN (REPLIGEN CORP) has 92 disclosed insider transactions from 15 insiders in the last 12 months (0 open-market buys, 42 sales, about $23.8M at reported prices) and 3 congressional trades from 1 member of Congress. The most recent disclosure was filed October 8, 2026.
Open-market buys / sales
0 / 42
Congress trades (12m)
3
Distinct filers (12m)
16
Share price
Price and chart by TradingView for REPLIGEN CORP. US share prices here are delayed, not real-time. The trade records on this page come from government filings, not from this chart.
RGEN in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
BoughtSold
8 people account for the disclosed buying and selling in RGEN over the last 12 months; the most active is Loeillot Olivier with $8.6M.
Prices insiders traded at
What price did insiders buy and sell at? Each marker is one open-market trade at the share price reported on its Form 4.
▲ Bought▼ SoldAverage reported price that day
Insiders reported 25 open-market trades in RGEN since Nov 12, 2025, at prices from $140 to $190; the most recent was a sale at $179 on Oct 5, 2026. These are the prices on the filings, not adjusted for stock splits, and not a market price series.
Insider holdings over time
Is an insider building or unwinding a position? Shares held directly after each filing.
Loeillot OlivierGarland Jason K
Loeillot Olivier reported 45,788 shares held after the latest filing, against 42,939 at the first on record.
Insiders trading RGEN
Everyone who filed a Form 4 for this ticker, by number of rows on record. "Bought" and "sold" count open-market purchases (code P) and sales only; awards, option exercises and shares withheld for tax are in the row count but not in those two columns.
| Insider | Role | Rows | Bought | Sold | Value bought | Value sold | Latest |
|---|---|---|---|---|---|---|---|
| Loeillot Olivier | Chief Executive Officer | 26 | 0 | 14 | — | $8.8M | October 5, 2026 |
| Hunt Anthony | Director | 18 | 0 | 13 | — | $8.3M | March 2, 2026 |
| Garland Jason K | CFO | 7 | 0 | 5 | — | $397K | September 25, 2026 |
| Bylund James | Chief Operating Officer | 7 | 0 | 4 | — | $833K | March 5, 2026 |
| Douglass Brian Robb | CHIEF PRODUCT OFFICER | 6 | 0 | 2 | — | $70K | October 6, 2026 |
| MUIR GLENN P | Director | 6 | 0 | 0 | — | — | May 14, 2026 |
| KURIYEL RALF | Senior VP, R&D | 6 | 0 | 3 | — | $178K | March 5, 2026 |
| DAWES KAREN A | Director | 3 | 0 | 1 | — | $44K | May 14, 2026 |
| Hughes Violetta | CHIEF ACCOUNTING OFFICER | 2 | 0 | 1 | — | $47K | September 1, 2026 |
| BARTHELEMY NICOLAS | Director | 2 | 0 | 0 | — | — | May 14, 2026 |
| EGLINTON MANNER CARRIE | Director | 2 | 0 | 0 | — | — | May 14, 2026 |
| Konstantinov Konstantin | Director | 2 | 0 | 0 | — | — | May 14, 2026 |
| Madaus Martin D | Interim CEO | 2 | 0 | 0 | — | — | May 14, 2026 |
| Mhatre Rohin | Director | 2 | 0 | 0 | — | — | May 14, 2026 |
| Pax Margaret | Director | 2 | 0 | 0 | — | — | May 14, 2026 |
What kind of transactions these are 5 Form 4 codes
| Code | Meaning | Rows | Shares | Value at reported prices |
|---|---|---|---|---|
| A | Grant or award | 31 | 127,503 | — |
| S | Open-market sale | 25 | 91,970 | $15.3M |
| F | Shares withheld for tax | 18 | 24,866 | $3.4M |
| M | Option exercise or conversion | 18 | 123,504 | $5.3M |
| J | Other acquisition or disposal | 1 | 2,000 | — |
What each code means: Form 4 transaction codes.
Members of Congress trading RGEN
Members whose periodic transaction reports name this ticker. Amounts are the sums of the ranges as filed.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| Lisa C. McClain | Representative (MI, District 9), Republican | 3 | 1 | 2 | $3,003–$45K | October 31, 2025 |
Insider transactions
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Douglass Brian Robb | Other A | October 6, 2026 | October 8, 2026 | 2d | 675 | — | — | derivative | Form 4 ↗ | |
| Douglass Brian Robb | Other A | October 6, 2026 | October 8, 2026 | 2d | 700 | — | — | Form 4 ↗ | ||
| Loeillot Olivier | Option / conversion M | October 5, 2026 | October 6, 2026 | 1d | 4,202 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Loeillot Olivier | Sell S | October 5, 2026 | October 6, 2026 | 1d | 4,202 | $190 | $798K | 10b5-1 plan | Form 4 ↗ | |
| Loeillot Olivier | Option / conversion M | October 5, 2026 | October 6, 2026 | 1d | 4,202 | $155 | $651K | 10b5-1 plan | Form 4 ↗ | |
| Loeillot Olivier | Sell S | October 5, 2026 | October 6, 2026 | 1d | 1,333 | $179 | $238K | 10b5-1 plan | Form 4 ↗ | |
| Loeillot Olivier | Sell F | October 2, 2026 | October 5, 2026 | 3d | 1,248 | $182 | $227K | Form 4 ↗ | ||
| Garland Jason K | Sell F | September 25, 2026 | September 28, 2026 | 3d | 421 | $190 | $80K | Form 4 ↗ | ||
| Loeillot Olivier | Option / conversion M | September 24, 2026 | September 25, 2026 | 1d | 4,542 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Loeillot Olivier | Option / conversion M | September 24, 2026 | September 25, 2026 | 1d | 8,404 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Loeillot Olivier | Sell S | September 24, 2026 | September 25, 2026 | 1d | 4,542 | $190 | $863K | 10b5-1 plan | Form 4 ↗ | |
| Loeillot Olivier | Option / conversion M | September 24, 2026 | September 25, 2026 | 1d | 4,542 | $155 | $706K | 10b5-1 plan | Form 4 ↗ | |
| Loeillot Olivier | Sell S | September 24, 2026 | September 25, 2026 | 1d | 8,404 | $190 | $1.6M | 10b5-1 plan | Form 4 ↗ | |
| Loeillot Olivier | Option / conversion M | September 24, 2026 | September 25, 2026 | 1d | 8,404 | $155 | $1.3M | 10b5-1 plan | Form 4 ↗ | |
| Loeillot Olivier | Option / conversion M | September 21, 2026 | September 22, 2026 | 1d | 5,426 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Loeillot Olivier | Sell S | September 21, 2026 | September 22, 2026 | 1d | 5,426 | $180 | $977K | 10b5-1 plan | Form 4 ↗ | |
| Loeillot Olivier | Option / conversion M | September 21, 2026 | September 22, 2026 | 1d | 5,426 | $142 | $769K | 10b5-1 plan | Form 4 ↗ | |
| Loeillot Olivier | Sell S | September 4, 2026 | September 8, 2026 | 4d | 3,035 | $166 | $504K | 10b5-1 plan | Form 4 ↗ | |
| Loeillot Olivier | Sell F | September 3, 2026 | September 8, 2026 | 5d | 2,842 | $170 | $482K | late10b5-1 plan | Form 4 ↗ | |
| Hughes Violetta | Sell F | September 1, 2026 | September 2, 2026 | 1d | 277 | $170 | $47K | Form 4 ↗ | ||
| Hughes Violetta | Other A | March 5, 2026 | September 2, 2026 | 181d | 2,466 | — | — | late | Form 4 ↗ | |
| Loeillot Olivier | Option / conversion M | August 20, 2026 | August 21, 2026 | 1d | 5,426 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Loeillot Olivier | Sell S | August 20, 2026 | August 21, 2026 | 1d | 5,426 | $180 | $977K | 10b5-1 plan | Form 4 ↗ | |
| Loeillot Olivier | Option / conversion M | August 20, 2026 | August 21, 2026 | 1d | 5,426 | $142 | $769K | 10b5-1 plan | Form 4 ↗ | |
| Garland Jason K | Sell S | July 16, 2026 | July 17, 2026 | 1d | 530 | $150 | $80K | 10b5-1 plan | Form 4 ↗ | |
| Garland Jason K | Sell S | June 25, 2026 | June 26, 2026 | 1d | 733 | $145 | $106K | 10b5-1 plan | Form 4 ↗ | |
| Madaus Martin D | Other A | May 14, 2026 | May 18, 2026 | 4d | 2,239 | — | — | derivative | Form 4 ↗ | |
| Madaus Martin D | Other A | May 14, 2026 | May 18, 2026 | 4d | 995 | — | — | Form 4 ↗ | ||
| Konstantinov Konstantin | Other A | May 14, 2026 | May 18, 2026 | 4d | 2,239 | — | — | derivative | Form 4 ↗ | |
| Konstantinov Konstantin | Other A | May 14, 2026 | May 18, 2026 | 4d | 995 | — | — | Form 4 ↗ | ||
| Mhatre Rohin | Other A | May 14, 2026 | May 18, 2026 | 4d | 2,239 | — | — | derivative | Form 4 ↗ | |
| Mhatre Rohin | Other A | May 14, 2026 | May 18, 2026 | 4d | 995 | — | — | Form 4 ↗ | ||
| EGLINTON MANNER CARRIE | Other A | May 14, 2026 | May 18, 2026 | 4d | 2,239 | — | — | derivative | Form 4 ↗ | |
| EGLINTON MANNER CARRIE | Other A | May 14, 2026 | May 18, 2026 | 4d | 995 | — | — | Form 4 ↗ | ||
| Pax Margaret | Other A | May 14, 2026 | May 18, 2026 | 4d | 2,239 | — | — | derivative | Form 4 ↗ | |
| Pax Margaret | Other A | May 14, 2026 | May 18, 2026 | 4d | 995 | — | — | Form 4 ↗ | ||
| DAWES KAREN A | Other A | May 14, 2026 | May 18, 2026 | 4d | 2,239 | — | — | derivative | Form 4 ↗ | |
| DAWES KAREN A | Other A | May 14, 2026 | May 18, 2026 | 4d | 995 | — | — | Form 4 ↗ | ||
| MUIR GLENN P | Other A | May 14, 2026 | May 18, 2026 | 4d | 2,239 | — | — | derivative | Form 4 ↗ | |
| MUIR GLENN P | Other A | May 14, 2026 | May 18, 2026 | 4d | 995 | — | — | Form 4 ↗ | ||
| BARTHELEMY NICOLAS | Other A | May 14, 2026 | May 18, 2026 | 4d | 2,239 | — | — | derivative | Form 4 ↗ | |
| BARTHELEMY NICOLAS | Other A | May 14, 2026 | May 18, 2026 | 4d | 995 | — | — | Form 4 ↗ | ||
| MUIR GLENN P | Option / conversion M | May 7, 2026 | May 8, 2026 | 1d | 2,434 | — | — | derivative | Form 4 ↗ | |
| MUIR GLENN P | Option / conversion M | May 7, 2026 | May 8, 2026 | 1d | 2,434 | $39 | $94K | Form 4 ↗ | ||
| Douglass Brian Robb | Sell F | May 7, 2026 | May 8, 2026 | 1d | 334 | $126 | $42K | Form 4 ↗ | ||
| Loeillot Olivier | Sell S | April 21, 2026 | April 22, 2026 | 1d | 3,832 | $140 | $536K | 10b5-1 plan | Form 4 ↗ | |
| KURIYEL RALF | Other A | March 5, 2026 | March 23, 2026 | 18d | 5,669 | — | — | latederivative | Form 4 ↗ | |
| KURIYEL RALF | Other A | March 5, 2026 | March 23, 2026 | 18d | 5,284 | — | — | late | Form 4 ↗ | |
| Loeillot Olivier | Other A | March 5, 2026 | March 23, 2026 | 18d | 25,890 | — | — | latederivative | Form 4 ↗ | |
| Loeillot Olivier | Other A | March 5, 2026 | March 23, 2026 | 18d | 24,134 | — | — | late | Form 4 ↗ | |
| Bylund James | Other A | March 5, 2026 | March 23, 2026 | 18d | 8,315 | — | — | latederivative | Form 4 ↗ | |
| Bylund James | Other A | March 5, 2026 | March 23, 2026 | 18d | 7,751 | — | — | late | Form 4 ↗ | |
| Garland Jason K | Other A | March 5, 2026 | March 23, 2026 | 18d | 8,315 | — | — | latederivative | Form 4 ↗ | |
| Garland Jason K | Other A | March 5, 2026 | March 23, 2026 | 18d | 7,751 | — | — | late | Form 4 ↗ | |
| Bylund James | Sell F | March 4, 2026 | March 5, 2026 | 1d | 62 | $126 | $7,802 | Form 4 ↗ | ||
| Bylund James | Other A | March 4, 2026 | March 5, 2026 | 1d | 125 | — | — | Form 4 ↗ | ||
| KURIYEL RALF | Sell F | March 4, 2026 | March 5, 2026 | 1d | 42 | $126 | $5,285 | Form 4 ↗ | ||
| KURIYEL RALF | Other A | March 4, 2026 | March 5, 2026 | 1d | 125 | — | — | Form 4 ↗ | ||
| Bylund James | Sell F | March 2, 2026 | March 3, 2026 | 1d | 2,433 | $125 | $304K | Form 4 ↗ | ||
| Bylund James | Sell F | February 27, 2026 | March 3, 2026 | 4d | 1,478 | $129 | $190K | Form 4 ↗ | ||
| Loeillot Olivier | Sell F | March 2, 2026 | March 3, 2026 | 1d | 1,610 | $125 | $201K | Form 4 ↗ | ||
| Loeillot Olivier | Sell F | February 27, 2026 | March 3, 2026 | 4d | 344 | $129 | $44K | Form 4 ↗ | ||
| Hunt Anthony | Sell F | March 2, 2026 | March 3, 2026 | 1d | 9,897 | $125 | $1.2M | Form 4 ↗ | ||
| Garland Jason K | Sell F | March 2, 2026 | March 3, 2026 | 1d | 715 | $125 | $89K | Form 4 ↗ | ||
| Garland Jason K | Sell F | February 27, 2026 | March 3, 2026 | 4d | 327 | $129 | $42K | Form 4 ↗ | ||
| KURIYEL RALF | Sell F | March 2, 2026 | March 3, 2026 | 1d | 923 | $125 | $115K | Form 4 ↗ | ||
| KURIYEL RALF | Sell F | February 27, 2026 | March 3, 2026 | 4d | 444 | $129 | $57K | Form 4 ↗ | ||
| Douglass Brian Robb | Sell F | March 2, 2026 | March 3, 2026 | 1d | 221 | $125 | $28K | Form 4 ↗ | ||
| Douglass Brian Robb | Other A | December 31, 2025 | January 12, 2026 | 12d | 2,143 | — | — | latederivative | Form 4 ↗ | |
| Douglass Brian Robb | Other A | December 31, 2025 | January 12, 2026 | 12d | 2,288 | — | — | late | Form 4 ↗ | |
| DAWES KAREN A | Sell S | December 17, 2025 | December 18, 2025 | 1d | 275 | $161 | $44K | Form 4 ↗ | ||
| MUIR GLENN P | Option / conversion M | December 16, 2025 | December 17, 2025 | 1d | 3,366 | — | — | derivative | Form 4 ↗ | |
| MUIR GLENN P | Option / conversion M | December 16, 2025 | December 17, 2025 | 1d | 3,366 | $26 | $88K | Form 4 ↗ | ||
| Hunt Anthony | Other J | December 4, 2025 | December 8, 2025 | 4d | 2,000 | — | — | Form 4 ↗ | ||
| Loeillot Olivier | Sell S | November 25, 2025 | November 26, 2025 | 1d | 7,041 | $170 | $1.2M | 10b5-1 plan | Form 4 ↗ | |
| Bylund James | Sell S | November 18, 2025 | November 19, 2025 | 1d | 2,191 | $151 | $331K | Form 4 ↗ | ||
| Hunt Anthony | Option / conversion M | November 13, 2025 | November 14, 2025 | 1d | 2,952 | — | — | derivative | Form 4 ↗ | |
| Hunt Anthony | Option / conversion M | November 13, 2025 | November 14, 2025 | 1d | 2,952 | $34 | $100K | Form 4 ↗ | ||
| Hunt Anthony | Sell S | November 13, 2025 | November 14, 2025 | 1d | 1,956 | $157 | $307K | Form 4 ↗ | ||
| Hunt Anthony | Sell S | November 13, 2025 | November 14, 2025 | 1d | 5,737 | $156 | $896K | Form 4 ↗ | ||
| Hunt Anthony | Sell S | November 13, 2025 | November 14, 2025 | 1d | 3,000 | $155 | $466K | Form 4 ↗ | ||
| Hunt Anthony | Sell S | November 13, 2025 | November 14, 2025 | 1d | 2,500 | $154 | $386K | Form 4 ↗ | ||
| Hunt Anthony | Sell S | November 13, 2025 | November 14, 2025 | 1d | 2,923 | $153 | $448K | Form 4 ↗ | ||
| Hunt Anthony | Sell S | November 13, 2025 | November 14, 2025 | 1d | 2,100 | $152 | $320K | Form 4 ↗ | ||
| Hunt Anthony | Sell S | November 13, 2025 | November 14, 2025 | 1d | 1,784 | $151 | $269K | Form 4 ↗ | ||
| Hunt Anthony | Option / conversion M | November 12, 2025 | November 13, 2025 | 1d | 25,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Hunt Anthony | Sell S | November 12, 2025 | November 13, 2025 | 1d | 464 | $159 | $74K | 10b5-1 plan | Form 4 ↗ | |
| Hunt Anthony | Sell S | November 12, 2025 | November 13, 2025 | 1d | 11,096 | $158 | $1.8M | 10b5-1 plan | Form 4 ↗ | |
| Hunt Anthony | Sell S | November 12, 2025 | November 13, 2025 | 1d | 4,959 | $157 | $777K | 10b5-1 plan | Form 4 ↗ | |
| Hunt Anthony | Sell S | November 12, 2025 | November 13, 2025 | 1d | 4,740 | $156 | $739K | 10b5-1 plan | Form 4 ↗ | |
| Hunt Anthony | Sell S | November 12, 2025 | November 13, 2025 | 1d | 3,741 | $155 | $580K | 10b5-1 plan | Form 4 ↗ | |
| Hunt Anthony | Option / conversion M | November 12, 2025 | November 13, 2025 | 1d | 25,000 | $34 | $847K | 10b5-1 plan | Form 4 ↗ | |
| Loeillot Olivier | Sell F | October 2, 2025 | October 6, 2025 | 4d | 1,248 | $145 | $181K | Form 4 ↗ |
Congressional trades
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Lisa C. McClain | Sell | October 31, 2025 | November 21, 2025 | 21d | — | — | $1,001–$15K | spouse | House PTR ↗ | |
| Lisa C. McClain | Buy | October 30, 2025 | November 21, 2025 | 22d | — | — | $1,001–$15K | spouse | House PTR ↗ | |
| Lisa C. McClain | Sell | October 30, 2025 | November 21, 2025 | 22d | — | — | $1,001–$15K | spouse | House PTR ↗ |
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Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- How to read a congressional trade report Owner tells you whose asset it was: the member, the spouse, a dependent child, or held jointly.
- Why congressional trade amounts are ranges There are ten ranges; the lowest is $1,001–$15,000 and the highest is over $50,000,000.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 1 | 3 | November 21, 2025 | November 21, 2025 | House Clerk search |
| SEC EDGAR, Form 4 | 43 | 93 | October 6, 2025 | October 8, 2026 | Form 4 list on EDGAR |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insider rows are Form 4 filings for this issuer from SEC EDGAR; congressional rows are periodic transaction reports parsed from the House Clerk and the Senate eFD. Values use the reported price for Form 4 and the disclosed range for Congress. See methodology and corrections.
Not investment advice. Disclosures are shown as filed and may lag the trade or be amended. No recommendation is made or implied.