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Repligen Corp (RGEN)
NASDAQ: RGEN · Real-Time Price · USD
Healthcare · Medical Instruments & Supplies
179.91+2.98 (+1.68%)
Insider Score
––Not scored
RGEN Insider Score
Insiders filed in the last 90 days, but none of those trades qualified for scoring — round-trip buys and filings whose price is far off the market are excluded.
RGEN Stock Insider Trading Activity
RGEN stock’s insider trading shows 9 sales on the open market for an estimated $6.14M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
Scored window · last 90 days0 qualifying buys0 insiders$0 bought— these are the numbers in the rankings table; the full history below shows every filing (buys, sells and older activity).
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Douglass Brian Robb Other | Award | 700 | — | — | 8.8% | 8,685 | Oct 6, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Sell | 4,202 | $190.00 | $798.38K | 8.4% | 45,788 | Oct 5, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Option exercise | 4,202 | $154.96 | $651.14K | 9.2% | 49,990 | Oct 5, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Sell | 1,333 | $178.75 | $238.27K | 2.8% | 45,788 | Oct 5, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Tax withheld | 1,248 | $181.70 | $226.76K | 2.6% | 47,121 | Oct 2, 2026 | — | Form 4 |
| Garland Jason K CFO | Tax withheld | 421 | $189.68 | $79.86K | 2.2% | 18,408 | Sep 25, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Sell | 4,542 | $190.00 | $862.98K | 8.6% | 48,369 | Sep 24, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Option exercise | 8,404 | $154.96 | $1.30M | 17.4% | 56,773 | Sep 24, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Sell | 8,404 | $190.00 | $1.60M | 14.8% | 48,369 | Sep 24, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Option exercise | 4,542 | $155.38 | $705.74K | 9.4% | 52,911 | Sep 24, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Option exercise | 5,426 | $141.79 | $769.35K | 11.2% | 53,795 | Sep 21, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Sell | 5,426 | $180.00 | $976.68K | 10.1% | 48,369 | Sep 21, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Sell | 3,035 | $165.90 | $503.51K | 5.9% | 48,369 | Sep 4, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Tax withheld | 2,842 | $169.61 | $482.03K | 5.2% | 51,404 | Sep 3, 2026 | — | Form 4 |
| Hughes Violetta Other | Tax withheld | 277 | $170.02 | $47.10K | 4.2% | 6,331 | Sep 1, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Option exercise | 5,426 | $141.79 | $769.35K | 10.0% | 59,672 | Aug 20, 2026 | — | Form 4 |
| Loeillot Olivier CEO | Sell | 5,426 | $180.00 | $976.68K | 9.1% | 54,246 | Aug 20, 2026 | — | Form 4 |
| Garland Jason K CFO | Sell | 530 | $150.00 | $79.50K | 2.7% | 18,829 | Jul 16, 2026 | — | Form 4 |
| Garland Jason K CFO | Sell | 733 | $145.00 | $106.28K | 3.6% | 19,359 | Jun 25, 2026 | — | Form 4 |
| Mhatre Rohin Director | Award | 995 | — | — | 24.8% | 5,014 | May 14, 2026 | — | Form 4 |
| Pax Margaret Director | Award | 995 | — | — | 49.4% | 3,011 | May 14, 2026 | — | Form 4 |
| DAWES KAREN A Director | Award | 995 | — | — | 1.1% | 92,816 | May 14, 2026 | — | Form 4 |
| BARTHELEMY NICOLAS Director | Award | 995 | — | — | 22.4% | 5,436 | May 14, 2026 | — | Form 4 |
| EGLINTON MANNER CARRIE Director | Award | 995 | — | — | 22.3% | 5,461 | May 14, 2026 | — | Form 4 |
| MUIR GLENN P Director | Award | 995 | — | — | 2.5% | 40,051 | May 14, 2026 | — | Form 4 |
| Konstantinov Konstantin Director | Award | 995 | — | — | 34.4% | 3,889 | May 14, 2026 | — | Form 4 |
| Madaus Martin D Director | Award | 995 | — | — | 17.8% | 6,581 | May 14, 2026 | — | Form 4 |
| MUIR GLENN P Director | Option exercise | 2,434 | $38.76 | $94.34K | 6.6% | 39,056 | May 7, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Sell (S) — Open-market or private sale
- Award (A) — Grant or award from the company, not a purchase
- Tax withheld (F) — Shares withheld to pay tax or an exercise price
- Option exercise (M) — Exercise or conversion of an exempt derivative
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.