Repligen Corporation (RGEN) Insider Trading
Over the last 3 months, RGEN insiders made 0 open-market buys and 3 sales, a net sale of -$1.2M (SEC Form 4). Over the last 6 months, 340 institutions increased and 280 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
3
Net (3m)
-$1.2M
Insider trades by month Buys Sells
Nov
Dec
Apr
Jun
Jul
Aug
Context3-month price +44.6%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 21, 2026 | Loeillot Olivierdirector, officer: Chief Executive Officer | Option | 5,426 | $141.79 |
| Aug 21, 2026 | Loeillot Olivierdirector, officer: Chief Executive Officer | Sell | 5,426 | $180.00 |
| Jul 17, 2026 | Garland Jason Kofficer: CFO | Sell | 530 | $150.00 |
| Jun 26, 2026 | Garland Jason Kofficer: CFO | Sell | 733 | $145.00 |
| May 18, 2026 | MUIR GLENN Pdirector | Grant | 995 | — |
| May 18, 2026 | Mhatre Rohindirector | Grant | 995 | — |
| May 18, 2026 | Pax Margaretdirector | Grant | 2,239 | $103.38 |
| May 18, 2026 | BARTHELEMY NICOLASdirector | Grant | 995 | — |
| May 18, 2026 | Pax Margaretdirector | Grant | 995 | — |
| May 18, 2026 | Mhatre Rohindirector | Grant | 2,239 | $103.38 |
| May 18, 2026 | BARTHELEMY NICOLASdirector | Grant | 2,239 | $103.38 |
| May 18, 2026 | EGLINTON MANNER CARRIEdirector | Grant | 2,239 | $103.38 |
| May 18, 2026 | Konstantinov Konstantindirector | Grant | 2,239 | $103.38 |
| May 18, 2026 | DAWES KAREN Adirector | Grant | 2,239 | $103.38 |
| May 18, 2026 | DAWES KAREN Adirector | Grant | 995 | — |
| May 18, 2026 | Madaus Martin Ddirector | Grant | 995 | — |
| May 18, 2026 | MUIR GLENN Pdirector | Grant | 2,239 | $103.38 |
| May 18, 2026 | Konstantinov Konstantindirector | Grant | 995 | — |
| May 18, 2026 | EGLINTON MANNER CARRIEdirector | Grant | 995 | — |
| May 18, 2026 | Madaus Martin Ddirector | Grant | 2,239 | $103.38 |
| May 8, 2026 | MUIR GLENN Pdirector | Option | 2,434 | $38.76 |
| May 8, 2026 | Douglass Brian Robbofficer: CHIEF PRODUCT OFFICER | Tax | 334 | $126.43 |
| Apr 22, 2026 | Loeillot Olivierdirector, officer: Chief Executive Officer | Sell | 3,832 | $140.00 |
| Mar 23, 2026 | Garland Jason Kofficer: CFO | Grant | 7,751 | — |
| Mar 23, 2026 | KURIYEL RALFofficer: Senior VP, R&D | Grant | 5,284 | — |
| Mar 23, 2026 | Bylund Jamesofficer: Chief Operating Officer | Grant | 8,315 | $141.91 |
| Mar 23, 2026 | KURIYEL RALFofficer: Senior VP, R&D | Grant | 5,669 | $141.91 |
| Mar 23, 2026 | Garland Jason Kofficer: CFO | Grant | 8,315 | $141.91 |
| Mar 23, 2026 | Bylund Jamesofficer: Chief Operating Officer | Grant | 7,751 | — |
| Mar 23, 2026 | Loeillot Olivierofficer: Chief Executive Officer | Grant | 24,134 | — |
Source: RGEN SEC Form 4 filings, latest Aug 21, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their RGEN positions over the last 6 months (SEC Form 13F).
Increased
340
New positions
167
Reduced
280
Sold out
57
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BLACKROCK, INC. | Reduced | 6.0M | May 13, 2026 |
| BlackRock, Inc. | Reduced | 5.4M | Aug 7, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 4.9M | May 15, 2026 |
| FMR LLC | Increased | 3.3M | Aug 13, 2026 |
| FMR LLC | Increased | 2.9M | May 15, 2026 |
| UNITED CAPITAL FINANCIAL ADVISORS, LLC | Increased | 2.8M | Aug 17, 2026 |
| UNITED CAPITAL FINANCIAL ADVISERS, LLC | Increased | 2.8M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 2.4M | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 2.4M | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 2.3M | Aug 13, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 2.3M | May 8, 2026 |
| MAVERICK CAPITAL LTD | Increased | 2.0M | Aug 14, 2026 |
| STATE STREET CORP | Increased | 1.8M | Aug 7, 2026 |
| STATE STREET CORP | Increased | 1.8M | May 15, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 1.8M | Aug 14, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.