RGEN
insider transactionsREPLIGEN CORP — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 365d
+50.5K
54.3K buy · 3.8K sell
Net value · 365d
-$375.9K
$160.6K in · $536.5K out
Sentiment · 365d
Net buying
23% buying · 77% selling
Open-market trades · 365d
3
54.3K buy · 3.8K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
-
Grant·A
Director
$0
30.0K sh
Own +8%
-
Grant·A
Director
$0
2.2K sh
Own New
-
Grant·A
Director
$0
995 sh
Own +49%
-
Grant·A
Director
$0
2.2K sh
Own New
-
Grant·A
Director
$0
995 sh
Own +25%
-
Grant·A
Director
$0
2.2K sh
Own New
-
Grant·A
Director
$0
995 sh
Own +18%
-
Grant·A
Director
$0
2.2K sh
Own New
-
Grant·A
Director
$0
995 sh
Own +3%
-
Grant·A
Director
$0
2.2K sh
Own New
-
Grant·A
Director
$0
995 sh
Own +34%
-
Grant·A
Director
$0
2.2K sh
Own New
-
Grant·A
Director
$0
995 sh
Own +22%
-
Grant·A
Director
$0
2.2K sh
Own New
-
Grant·A
Director
$0
995 sh
Own +1%
-
Grant·A
Director
$0
2.2K sh
Own New
-
Grant·A
Director
$0
995 sh
Own +22%
-
Exercise·M
Director
$0
2.4K sh
Own New
-
Exercise·M
Director
$94.3K
2.4K sh · $38.76
Own +7%
-
Other·F
CHIEF PRODUCT OFFICER
$42.2K
334 sh · $126.43
Own -4%
-
Sell·S
Olivier Loeillot KEY
Chief Executive Officer · 10b5-1
$536.5K
3.8K sh · $140.00
Own -7%
-
Buy·P
President & CEO · 10b5-1
$94.6K
32.3K sh · $2.93
Own +1%
-
Buy·P
President & CEO · 10b5-1
$66.0K
22.0K sh · $3.00
Own +1%
-
Grant·A
Olivier Loeillot KEY
Chief Executive Officer
$0
25.9K sh
Own New
-
Grant·A
Olivier Loeillot KEY
Chief Executive Officer
$0
24.1K sh
Own +71%
-
Grant·A
Senior VP, R&D
$0
5.7K sh
Own New
-
Grant·A
Senior VP, R&D
$0
5.3K sh
Own +36%
-
Grant·A
Jason K Garland KEY
CFO
$0
8.3K sh
Own New
-
Grant·A
Jason K Garland KEY
CFO
$0
7.8K sh
Own +63%
-
Grant·A
Chief Operating Officer
$0
8.3K sh
Own New
-
Grant·A
Chief Operating Officer
$0
7.8K sh
Own +44%
-
Other·F
Senior VP, R&D
$5.3K
42 sh · $125.84
Own -0%
-
Grant·A
Senior VP, R&D
$0
125 sh
Own +1%
-
Other·F
Chief Operating Officer
$7.8K
62 sh · $125.84
Own -0%
-
Grant·A
Chief Operating Officer
$0
125 sh
Own +1%
-
Other·F
Olivier Loeillot KEY
Chief Executive Officer
$201.2K
1.6K sh · $124.97
Own -5%
-
Other·F
Senior VP, R&D
$115.3K
923 sh · $124.97
Own -6%
-
Other·F
Director
$1.2M
9.9K sh · $124.97
Own -10%
-
Other·F
Jason K Garland KEY
CFO
$89.4K
715 sh · $124.97
Own -5%
-
Grant·A
President & CEO
$0
355.5K sh
Own +20%
-
Other·F
CHIEF PRODUCT OFFICER
$27.6K
221 sh · $124.97
Own -3%
-
Other·F
Chief Operating Officer
$304.1K
2.4K sh · $124.97
Own -12%
-
Other·F
President & CEO
$373.2K
122.7K sh · $3.04
Own -6%
-
Other·F
President & CEO
$170.7K
56.1K sh · $3.04
Own -3%
-
Grant·A
President & CEO
$0
129.0K sh
Own +7%
-
Other·F
Olivier Loeillot KEY
Chief Executive Officer
$44.3K
344 sh · $128.73
Own -1%
-
Other·F
Senior VP, R&D
$57.2K
444 sh · $128.73
Own -3%
-
Other·F
Jason K Garland KEY
CFO
$42.1K
327 sh · $128.73
Own -2%
-
Other·F
Chief Operating Officer
$190.3K
1.5K sh · $128.73
Own -7%
-
Grant·A
CHIEF PRODUCT OFFICER
$0
2.1K sh
Own New
-
Grant·A
CHIEF PRODUCT OFFICER
$0
2.3K sh
Own +37%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| May 28, 2026 | Glenn P Muir | Grant A | 30.0K | $0 |
| May 14, 2026 | Margaret Pax | Grant A | 2.2K | $0 |
| May 14, 2026 | Margaret Pax | Grant A | 995 | $0 |
| May 14, 2026 | Rohin Mhatre | Grant A | 2.2K | $0 |
| May 14, 2026 | Rohin Mhatre | Grant A | 995 | $0 |
| May 14, 2026 | Martin D Madaus | Grant A | 2.2K | $0 |
| May 14, 2026 | Martin D Madaus | Grant A | 995 | $0 |
| May 14, 2026 | Glenn P Muir | Grant A | 2.2K | $0 |
| May 14, 2026 | Glenn P Muir | Grant A | 995 | $0 |
| May 14, 2026 | Konstantin Konstantinov | Grant A | 2.2K | $0 |
| May 14, 2026 | Konstantin Konstantinov | Grant A | 995 | $0 |
| May 14, 2026 | Manner Carrie Eglinton | Grant A | 2.2K | $0 |
| May 14, 2026 | Manner Carrie Eglinton | Grant A | 995 | $0 |
| May 14, 2026 | Karen A Dawes | Grant A | 2.2K | $0 |
| May 14, 2026 | Karen A Dawes | Grant A | 995 | $0 |
| May 14, 2026 | Nicolas Barthelemy | Grant A | 2.2K | $0 |
| May 14, 2026 | Nicolas Barthelemy | Grant A | 995 | $0 |
| May 7, 2026 | Glenn P Muir | Exercise M | 2.4K | $0 |
| May 7, 2026 | Glenn P Muir | Exercise M | 2.4K | $94.3K |
| May 7, 2026 | Brian Robb Douglass | Other F | 334 | $42.2K |
| Apr 21, 2026 | Olivier Loeillot KEY 10b5-1 | Sell S | 3.8K | $536.5K |
| Mar 20, 2026 | Manner Carrie Eglinton KEY 10b5-1 | Buy P | 32.3K | $94.6K |
| Mar 13, 2026 | Manner Carrie Eglinton KEY 10b5-1 | Buy P | 22.0K | $66.0K |
| Mar 5, 2026 | Olivier Loeillot KEY | Grant A | 25.9K | $0 |
| Mar 5, 2026 | Olivier Loeillot KEY | Grant A | 24.1K | $0 |
| Mar 5, 2026 | Ralf Kuriyel | Grant A | 5.7K | $0 |
| Mar 5, 2026 | Ralf Kuriyel | Grant A | 5.3K | $0 |
| Mar 5, 2026 | Jason K Garland KEY | Grant A | 8.3K | $0 |
| Mar 5, 2026 | Jason K Garland KEY | Grant A | 7.8K | $0 |
| Mar 5, 2026 | James Bylund | Grant A | 8.3K | $0 |
| Mar 5, 2026 | James Bylund | Grant A | 7.8K | $0 |
| Mar 4, 2026 | Ralf Kuriyel | Other F | 42 | $5.3K |
| Mar 4, 2026 | Ralf Kuriyel | Grant A | 125 | $0 |
| Mar 4, 2026 | James Bylund | Other F | 62 | $7.8K |
| Mar 4, 2026 | James Bylund | Grant A | 125 | $0 |
| Mar 2, 2026 | Olivier Loeillot KEY | Other F | 1.6K | $201.2K |
| Mar 2, 2026 | Ralf Kuriyel | Other F | 923 | $115.3K |
| Mar 2, 2026 | Anthony Hunt | Other F | 9.9K | $1.2M |
| Mar 2, 2026 | Jason K Garland KEY | Other F | 715 | $89.4K |
| Mar 2, 2026 | Manner Carrie Eglinton KEY | Grant A | 355.5K | $0 |
| Mar 2, 2026 | Brian Robb Douglass | Other F | 221 | $27.6K |
| Mar 2, 2026 | James Bylund | Other F | 2.4K | $304.1K |
| Mar 1, 2026 | Manner Carrie Eglinton KEY | Other F | 122.7K | $373.2K |
| Mar 1, 2026 | Manner Carrie Eglinton KEY | Other F | 56.1K | $170.7K |
| Mar 1, 2026 | Manner Carrie Eglinton KEY | Grant A | 129.0K | $0 |
| Feb 27, 2026 | Olivier Loeillot KEY | Other F | 344 | $44.3K |
| Feb 27, 2026 | Ralf Kuriyel | Other F | 444 | $57.2K |
| Feb 27, 2026 | Jason K Garland KEY | Other F | 327 | $42.1K |
| Feb 27, 2026 | James Bylund | Other F | 1.5K | $190.3K |
| Dec 31, 2025 | Brian Robb Douglass | Grant A | 2.1K | $0 |
| Dec 31, 2025 | Brian Robb Douglass | Grant A | 2.3K | $0 |
About RGEN insider trading
This page tracks insider transactions for REPLIGEN CORP (RGEN) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.