Nasdaq · CIK 0000730272
RGEN REPLIGEN CORP
Insider trading from SEC Form 4. Last filing 4 d ago. Close $173.88 on Oct 9, 2026, +69% from the 52-week low and -11% from the high.
Last 90 days
Net insider value
-$5.0M
more sold than bought
Buys
0
$0 by 0 insiders
Sells
4
$5.0M by 1 insider
Insiders on file
15
with a Form 4 at this company
Price and insider trades, last year
RGENOct 9, 2026 · close 173.88
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at REPLIGEN CORP, scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 20Weak | Olivier Loeillot Chief Executive Officer sell | $1.0M 5,535 shares | -12% | +84% from low-3% from high | |
| 20Weak | Olivier Loeillot Chief Executive Officer sell | $2.5M 12,946 shares | -23% | +85% from low0% from high | |
| 20Weak | Olivier Loeillot Chief Executive Officer sell | $977k 5,426 shares | -10% | +76% from low-1% from high | |
| 23Weak | Olivier Loeillot Chief Executive Officer sell | $504k 3,035 shares | -6% | - | |
| 21Weak | Karen A Dawes director sell | $44k 275 shares | -0% | +44% from low-10% from high | |
| 50Moderate | Olivier Loeillot Chief Executive Officer sell | $1.2M 7,041 shares | -16% | +58% from low-1% from high | |
| 50Moderate | James Bylund Chief Operating Officer sell | $331k 2,191 shares | -9% | +41% from low-12% from high | |
| 45Moderate | Anthony Hunt director sell | $3.1M 20,000 shares | -20% | +38% from low-14% from high | |
| 25Weak | Anthony Hunt director sell | $3.9M 25,000 shares | -20% | +45% from low-9% from high | |
| 30Weak | Anthony Hunt director sell | $3.5M 29,111 shares | -22% | +10% from low-31% from high | |
| 53Moderate | Martin D Madaus director buy | $202k 1,800 shares | - | +2% from low-36% from high | |
| 25Weak | Anthony Hunt director sell | $3.3M 26,447 shares | -19% | +13% from low-29% from high | |
| 10Weak | Anthony Hunt director sell | $4.1M 26,756 shares | -16% | - | |
| 30Weak | Anthony Hunt director sell | $3.4M 24,246 shares | -15% | - |
Congressional trades
7 trades in RGEN disclosed by members of Congress under the STOCK Act. All congressional trades.
- Lisa C. McClainHouse · R-MI · last Nov 21, 20253 bought
3 sold - Jefferson ShreveHouse · R-IN · last May 8, 20250 bought
1 sold
| Member | Trade | Asset | Reported range | Trade / filing date | Source |
|---|---|---|---|---|---|
Lisa C. McClain House · R-MI | Sale | RGEN Repligen Corporation - Common Stock | $1,001 to $15k | Oct 30, 2025 / Nov 21, 2025 22 days after the trade | Clerk |
Lisa C. McClain House · R-MI | Purchase | RGEN Repligen Corporation - Common Stock | $1,001 to $15k | Oct 30, 2025 / Nov 21, 2025 22 days after the trade | Clerk |
Lisa C. McClain House · R-MI | Sale | RGEN Repligen Corporation - Common Stock | $1,001 to $15k | Oct 31, 2025 / Nov 21, 2025 21 days after the trade | Clerk |
Lisa C. McClain House · R-MI | Partial sale | RGEN Repligen Corporation - Common Stock | $1,001 to $15k | Jun 17, 2025 / Aug 13, 2025 57 days after the trade | Clerk |
Lisa C. McClain House · R-MI | Purchase | RGEN Repligen Corporation - Common Stock | $1,001 to $15k | Jul 22, 2025 / Aug 13, 2025 22 days after the trade | Clerk |
Lisa C. McClain House · R-MI | Purchase | RGEN Repligen Corporation - Common Stock | $1,001 to $15k | Jun 11, 2025 / Aug 13, 2025 63 days after the trade | Clerk |
Jefferson Shreve House · R-IN | Sale | RGEN Repligen Corporation - Common Stock | $15k to $50k | Apr 7, 2025 / May 8, 2025 31 days after the trade | Clerk |
Transactions
The last 100 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Oct 6, 2026 | Brian Robb Douglass CHIEF PRODUCT OFFICER | AGrant or award Common Stock | +700 | $0.00 | $0 | 8,685 | 4 d ago |
| Oct 6, 2026 | Brian Robb Douglass CHIEF PRODUCT OFFICER | AGrant or award Stock Option (Right to Buy)derivative | +675 | $0.00 | $0 | 675 | 4 d ago |
| Oct 5, 2026 | Olivier Loeillot Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -1,333 | $178.75 | $238k | 45,788 | 6 d ago |
| Oct 5, 2026 | Olivier Loeillot Chief Executive Officer | MOption exercise Common Stock10b5-1 | +4,202 | $154.96 | $651k | 49,990 | 6 d ago |
| Oct 5, 2026 | Olivier Loeillot Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -4,202 | $190.00 | $798k | 45,788 | 6 d ago |
| Oct 5, 2026 | Olivier Loeillot Chief Executive Officer | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -4,202 | $0.00 | $0 | 8,405 | 6 d ago |
| Oct 2, 2026 | Olivier Loeillot Chief Executive Officer | FTax withholding Common Stock | -1,248 | $181.70 | $227k | 47,121 | 7 d ago |
| Sep 25, 2026 | Jason K Garland CFO | FTax withholding Common Stock | -421 | $189.68 | $80k | 18,408 | 14 d ago |
| Sep 24, 2026 | Olivier Loeillot Chief Executive Officer | MOption exercise Common Stock10b5-1 | +8,404 | $154.96 | $1.3M | 56,773 | 17 d ago |
| Sep 24, 2026 | Olivier Loeillot Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -8,404 | $190.00 | $1.6M | 48,369 | 17 d ago |
| Sep 24, 2026 | Olivier Loeillot Chief Executive Officer | MOption exercise Common Stock10b5-1 | +4,542 | $155.38 | $706k | 52,911 | 17 d ago |
| Sep 24, 2026 | Olivier Loeillot Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -4,542 | $190.00 | $863k | 48,369 | 17 d ago |
| Sep 24, 2026 | Olivier Loeillot Chief Executive Officer | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -8,404 | $0.00 | $0 | 12,607 | 17 d ago |
| Sep 24, 2026 | Olivier Loeillot Chief Executive Officer | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -4,542 | $0.00 | $0 | 9,085 | 17 d ago |
| Sep 21, 2026 | Olivier Loeillot Chief Executive Officer | MOption exercise Common Stock10b5-1 | +5,426 | $141.79 | $769k | 53,795 | 20 d ago |
| Sep 21, 2026 | Olivier Loeillot Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -5,426 | $180.00 | $977k | 48,369 | 20 d ago |
| Sep 21, 2026 | Olivier Loeillot Chief Executive Officer | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -5,426 | $0.00 | $0 | 5,426 | 20 d ago |
| Sep 3, 2026 | Olivier Loeillot Chief Executive Officer | FTax withholding Common Stock10b5-1 | -2,842 | $169.61 | $482k | 51,404 | 34 d ago |
| Sep 4, 2026 | Olivier Loeillot Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -3,035 | $165.90 | $504k | 48,369 | 34 d ago |
| Mar 5, 2026 | Violetta Hughes CHIEF ACCOUNTING OFFICER | AGrant or award Common Stock | +2,466 | $0.00 | $0 | 6,608 | 40 d ago |
| Sep 1, 2026 | Violetta Hughes CHIEF ACCOUNTING OFFICER | FTax withholding Common Stock | -277 | $170.02 | $47k | 6,331 | 40 d ago |
| Dec 17, 2025 | Karen A Dawes director | SOpen-market sale Common Stock | -275 | $161.00 | $44k | 91,821 | Dec 18, 2025 |
| Dec 16, 2025 | Glenn P Muir director | MOption exercise Common Stock | +3,366 | $26.12 | $88k | 36,622 | Dec 17, 2025 |
| Dec 16, 2025 | Glenn P Muir director | MOption exercise Stock Option (Right to Buy)derivative | +3,366 | $0.00 | $0 | 3,366 | Dec 17, 2025 |
| Dec 4, 2025 | Anthony Hunt director | JOther Common Stock | -2,000 | - | - | 98,959 | Dec 8, 2025 |
| Nov 25, 2025 | Olivier Loeillot Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -7,041 | $170.00 | $1.2M | 35,898 | Nov 26, 2025 |
| Nov 18, 2025 | James Bylund Chief Operating Officer | SOpen-market sale Common Stock | -2,191 | $151.21 | $331k | 21,520 | Nov 19, 2025 |
| Nov 13, 2025 | Anthony Hunt director | SOpen-market sale Common Stock | -1,784 | $151.01 | $269k | 98,959 | Nov 14, 2025 |
| Nov 13, 2025 | Anthony Hunt director | SOpen-market sale Common Stock | -2,100 | $152.17 | $320k | 96,859 | Nov 14, 2025 |
| Nov 13, 2025 | Anthony Hunt director | SOpen-market sale Common Stock | -2,923 | $153.14 | $448k | 93,936 | Nov 14, 2025 |
| Nov 13, 2025 | Anthony Hunt director | SOpen-market sale Common Stock | -2,500 | $154.32 | $386k | 91,436 | Nov 14, 2025 |
| Nov 13, 2025 | Anthony Hunt director | SOpen-market sale Common Stock | -3,000 | $155.45 | $466k | 88,436 | Nov 14, 2025 |
| Nov 13, 2025 | Anthony Hunt director | SOpen-market sale Common Stock | -5,737 | $156.22 | $896k | 82,699 | Nov 14, 2025 |
| Nov 13, 2025 | Anthony Hunt director | SOpen-market sale Common Stock | -1,956 | $157.11 | $307k | 80,743 | Nov 14, 2025 |
| Nov 13, 2025 | Anthony Hunt director | MOption exercise Common Stock | +2,952 | $33.87 | $100k | 83,695 | Nov 14, 2025 |
| Nov 13, 2025 | Anthony Hunt director | MOption exercise Stock Option (Right to Buy)derivative | +2,952 | $0.00 | $0 | 14,760 | Nov 14, 2025 |
| Nov 12, 2025 | Anthony Hunt director | MOption exercise Common Stock10b5-1 | +25,000 | $33.87 | $847k | 125,743 | Nov 13, 2025 |
| Nov 12, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -3,741 | $154.92 | $580k | 122,002 | Nov 13, 2025 |
| Nov 12, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -4,740 | $155.85 | $739k | 117,262 | Nov 13, 2025 |
| Nov 12, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -4,959 | $156.65 | $777k | 112,303 | Nov 13, 2025 |
| Nov 12, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -11,096 | $158.01 | $1.8M | 101,207 | Nov 13, 2025 |
| Nov 12, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -464 | $158.51 | $74k | 100,743 | Nov 13, 2025 |
| Nov 12, 2025 | Anthony Hunt director | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -25,000 | $0.00 | $0 | 157,344 | Nov 13, 2025 |
| Oct 2, 2025 | Olivier Loeillot Chief Executive Officer | FTax withholding Common Stock | -1,248 | $145.23 | $181k | 42,939 | Oct 6, 2025 |
| Sep 25, 2025 | Jason K Garland CFO | FTax withholding Common Stock | -412 | $121.68 | $50k | 13,383 | Sep 26, 2025 |
| Sep 10, 2025 | Anthony Hunt director | MOption exercise Common Stock | +20,000 | $33.87 | $677k | 129,854 | Sep 11, 2025 |
| Sep 10, 2025 | Anthony Hunt director | SOpen-market sale Common Stock | -96 | $116.34 | $11k | 129,758 | Sep 11, 2025 |
| Sep 10, 2025 | Anthony Hunt director | SOpen-market sale Common Stock | -1,108 | $118.32 | $131k | 128,650 | Sep 11, 2025 |
| Sep 10, 2025 | Anthony Hunt director | SOpen-market sale Common Stock | -3,262 | $119.64 | $390k | 125,388 | Sep 11, 2025 |
| Sep 10, 2025 | Anthony Hunt director | SOpen-market sale Common Stock | -14,882 | $120.19 | $1.8M | 110,506 | Sep 11, 2025 |
| Sep 10, 2025 | Anthony Hunt director | SOpen-market sale Common Stock | -7,584 | $121.42 | $921k | 102,922 | Sep 11, 2025 |
| Sep 10, 2025 | Anthony Hunt director | SOpen-market sale Common Stock | -2,179 | $122.23 | $266k | 100,743 | Sep 11, 2025 |
| Sep 10, 2025 | Anthony Hunt director | MOption exercise Stock Option (Right to Buy)derivative | -20,000 | $0.00 | $0 | 182,344 | Sep 11, 2025 |
| Sep 3, 2025 | Olivier Loeillot Chief Executive Officer | FTax withholding Common Stock | -2,506 | $116.18 | $291k | 44,187 | Sep 4, 2025 |
| Sep 2, 2025 | Violetta Hughes CHIEF ACCOUNTING OFFICER | AGrant or award Common Stock | +4,142 | $0.00 | $0 | 4,142 | Sep 4, 2025 |
| Sep 2, 2025 | Violetta Hughes CHIEF ACCOUNTING OFFICER | AGrant or award Stock Option (Right to Buy)derivative | +3,914 | $0.00 | $0 | 3,914 | Sep 4, 2025 |
| Aug 8, 2025 | Martin D Madaus director | POpen-market purchase Common Stockindirect: By Martin D. Madaus 2011 Revocable Trust | +1,800 | $112.13 | $202k | 1,800 | Aug 12, 2025 |
| May 15, 2025 | Nicolas Barthelemy director | AGrant or award Common Stock | +973 | $0.00 | $0 | 4,441 | May 21, 2025 |
| May 15, 2025 | Nicolas Barthelemy director | AGrant or award Stock Option (Right to Buy)derivative | +1,800 | $0.00 | $0 | 1,800 | May 21, 2025 |
| May 15, 2025 | Konstantin Konstantinov director | AGrant or award Common Stock | +973 | $0.00 | $0 | 2,894 | May 19, 2025 |
| May 15, 2025 | Margaret Pax director | AGrant or award Common Stock | +973 | $0.00 | $0 | 2,016 | May 19, 2025 |
| May 15, 2025 | Glenn P Muir director | AGrant or award Common Stock | +973 | $0.00 | $0 | 33,256 | May 19, 2025 |
| May 15, 2025 | Martin D Madaus director | AGrant or award Common Stock | +973 | $0.00 | $0 | 5,586 | May 19, 2025 |
| May 15, 2025 | Rohin Mhatre director | AGrant or award Common Stock | +973 | $0.00 | $0 | 4,019 | May 19, 2025 |
| May 15, 2025 | Karen A Dawes director | AGrant or award Common Stock | +973 | $0.00 | $0 | 92,096 | May 19, 2025 |
| May 15, 2025 | Manner Carrie Eglinton director | AGrant or award Common Stock | +973 | $0.00 | $0 | 4,466 | May 19, 2025 |
| May 15, 2025 | Konstantin Konstantinov director | AGrant or award Stock Option (Right to Buy)derivative | +1,800 | $0.00 | $0 | 1,800 | May 19, 2025 |
| May 15, 2025 | Glenn P Muir director | AGrant or award Stock Option (Right to Buy)derivative | +1,800 | $0.00 | $0 | 1,800 | May 19, 2025 |
| May 15, 2025 | Rohin Mhatre director | AGrant or award Stock Option (Right to Buy)derivative | +1,800 | $0.00 | $0 | 1,800 | May 19, 2025 |
| May 15, 2025 | Margaret Pax director | AGrant or award Stock Option (Right to Buy)derivative | +1,800 | $0.00 | $0 | 1,800 | May 19, 2025 |
| May 15, 2025 | Karen A Dawes director | AGrant or award Stock Option (Right to Buy)derivative | +1,800 | $0.00 | $0 | 1,800 | May 19, 2025 |
| May 15, 2025 | Manner Carrie Eglinton director | AGrant or award Stock Option (Right to Buy)derivative | +1,800 | $0.00 | $0 | 1,800 | May 19, 2025 |
| May 15, 2025 | Martin D Madaus director | AGrant or award Stock Option (Right to Buy)derivative | +1,800 | $0.00 | $0 | 1,800 | May 19, 2025 |
| May 15, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -2,043 | $122.66 | $251k | 134,258 | May 16, 2025 |
| May 15, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -17,596 | $123.57 | $2.2M | 116,662 | May 16, 2025 |
| May 15, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -6,533 | $124.34 | $812k | 110,129 | May 16, 2025 |
| May 15, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -268 | $125.20 | $34k | 109,861 | May 16, 2025 |
| May 15, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -7 | $127.00 | $889 | 109,854 | May 16, 2025 |
| Apr 1, 2025 | James Bylund Chief Operating Officer | FTax withholding Common Stock | -454 | $128.50 | $58k | 23,711 | Apr 2, 2025 |
| Mar 13, 2025 | James Bylund Chief Operating Officer | AGrant or award Common Stock | +381 | $0.00 | $0 | 24,340 | Mar 20, 2025 |
| Mar 13, 2025 | James Bylund Chief Operating Officer | FTax withholding Common Stock | -175 | $142.44 | $25k | 24,165 | Mar 20, 2025 |
| Mar 17, 2025 | Anthony Hunt director | MOption exercise Common Stock10b5-1 | +5,000 | $33.87 | $169k | 141,301 | Mar 19, 2025 |
| Mar 17, 2025 | Anthony Hunt director | MOption exercise Common Stock10b5-1 | +21,756 | $59.52 | $1.3M | 163,057 | Mar 19, 2025 |
| Mar 17, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -60 | $148.05 | $8,883 | 162,997 | Mar 19, 2025 |
| Mar 17, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -100 | $150.38 | $15k | 162,897 | Mar 19, 2025 |
| Mar 17, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -2,518 | $151.09 | $380k | 160,379 | Mar 19, 2025 |
| Mar 17, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -6,176 | $151.96 | $939k | 154,203 | Mar 19, 2025 |
| Mar 17, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -15,619 | $152.82 | $2.4M | 138,584 | Mar 19, 2025 |
| Mar 17, 2025 | Anthony Hunt director | SOpen-market sale Common Stock10b5-1 | -2,283 | $153.70 | $351k | 136,301 | Mar 19, 2025 |
| Mar 17, 2025 | Anthony Hunt director | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -5,000 | $0.00 | $0 | 202,344 | Mar 19, 2025 |
| Mar 17, 2025 | Anthony Hunt director | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -21,756 | $0.00 | $0 | 0 | Mar 19, 2025 |
| Mar 3, 2025 | James Bylund Chief Operating Officer | AGrant or award Common Stock | +6,435 | $0.00 | $0 | 25,198 | Mar 4, 2025 |
| Mar 3, 2025 | Jason K Garland CFO | AGrant or award Common Stock | +6,435 | $0.00 | $0 | 13,795 | Mar 4, 2025 |
| Mar 3, 2025 | Anthony Hunt director | FTax withholding Common Stock | -10,142 | $155.38 | $1.6M | 136,301 | Mar 4, 2025 |
| Mar 3, 2025 | Ralf Kuriyel Senior VP, R&D | AGrant or award Common Stock | +4,826 | $0.00 | $0 | 16,448 | Mar 4, 2025 |
| Mar 3, 2025 | James Bylund Chief Operating Officer | FTax withholding Common Stock | -1,239 | $155.38 | $193k | 23,959 | Mar 4, 2025 |
| Mar 3, 2025 | Jason K Garland CFO | AGrant or award Stock Option (Right to Buy)derivative | +6,056 | $0.00 | $0 | 6,056 | Mar 4, 2025 |
| Mar 3, 2025 | Ralf Kuriyel Senior VP, R&D | FTax withholding Common Stock | -386 | $155.38 | $60k | 16,062 | Mar 4, 2025 |
| Mar 3, 2025 | James Bylund Chief Operating Officer | AGrant or award Stock Option (Right to Buy)derivative | +6,056 | $0.00 | $0 | 6,056 | Mar 4, 2025 |
| Mar 3, 2025 | Ralf Kuriyel Senior VP, R&D | AGrant or award Stock Option (Right to Buy)derivative | +4,542 | $0.00 | $0 | 4,542 | Mar 4, 2025 |
Insiders
Everyone who has filed a Form 4 here.
- Nicolas Barthelemydirector
- James BylundChief Operating Officer
- Karen A Dawesdirector
- Brian Robb DouglassCHIEF PRODUCT OFFICER
- Manner Carrie Eglintonceo, president, officer, director
- Jason K GarlandCFO
- Violetta HughesCHIEF ACCOUNTING OFFICER
- Anthony Huntdirector
- Ralf KuriyelSenior VP, R&D
- Konstantin Konstantinovdirector
- Olivier LoeillotChief Executive Officer
- Glenn P Muirdirector
- Martin D Madausdirector, ceo, officer
- Rohin Mhatredirector
- Margaret Paxdirector
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.