Repligen Corporation
Repligen Corporation (RGEN) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · RGEN · as of Jun 8, 2026
Activity summary
Buy transactions
1
P-Purchase only
Sell transactions
22
12 Months
Buy/Sell ratio
0.05
Buy/Sell (by trades)
Overall sentiment
Repligen Corporation insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 8, 2026
RGEN insider buying and selling by quarter
RGEN insider selling · RGEN insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 8, 2026
Active insiders
Most active in past 12 months · RGEN ceo insider trading
Showing all insiders · Click a card to filter the transactions table below
▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API
Recent insider transactions
RGEN executive sell shares · RGEN board member insider trading · RGEN insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| May 14, 2026 | Madaus Martin D Director | Award | 995 | — | Form 4 |
| May 14, 2026 | Konstantinov Konstantin Director | Award | 995 | — | Form 4 |
| May 14, 2026 | EGLINTON MANNER CARRIE Director | Award | 995 | — | Form 4 |
| May 14, 2026 | Mhatre Rohin Director | Award | 995 | — | Form 4 |
| May 14, 2026 | Pax Margaret Director | Award | 995 | — | Form 4 |
| May 14, 2026 | DAWES KAREN A Director | Award | 995 | — | Form 4 |
| May 14, 2026 | MUIR GLENN P Director | Award | 995 | — | Form 4 |
| May 14, 2026 | BARTHELEMY NICOLAS Director | Award | 995 | — | Form 4 |
| May 7, 2026 | MUIR GLENN P Director | Option | 2,434 | $94K | Form 4 |
| May 7, 2026 | Douglass Brian Robb CHIEF PRODUCT OFFICER | Other | 334 | $42K | Form 4 |
| Apr 21, 2026 | Loeillot Olivier CEO · Director | Sale | 3,832 | $536K | Form 4 |
| Mar 5, 2026 | KURIYEL RALF Senior VP, R&D | Award | 5,284 | — | Form 4 |
| Mar 5, 2026 | Loeillot Olivier CEO | Award | 24,134 | — | Form 4 |
| Mar 5, 2026 | Bylund James COO | Award | 7,751 | — | Form 4 |
| Mar 5, 2026 | Garland Jason K CFO | Award | 7,751 | — | Form 4 |
| Mar 4, 2026 | Bylund James COO | Award | 125 | — | Form 4 |
| Mar 4, 2026 | Bylund James COO | Other | 62 | $8K | Form 4 |
| Mar 4, 2026 | KURIYEL RALF Senior VP, R&D | Award | 125 | — | Form 4 |
| Mar 4, 2026 | KURIYEL RALF Senior VP, R&D | Other | 42 | $5K | Form 4 |
| Feb 27, 2026 | Bylund James COO | Other | 1,478 | $190K | Form 4 |
| Mar 2, 2026 | Bylund James COO | Other | 2,433 | $304K | Form 4 |
| Feb 27, 2026 | Loeillot Olivier CEO · Director | Other | 344 | $44K | Form 4 |
| Mar 2, 2026 | Loeillot Olivier CEO · Director | Other | 1,610 | $201K | Form 4 |
| Mar 2, 2026 | Hunt Anthony Director | Other | 9,897 | $1.24M⚡ | Form 4 |
| Feb 27, 2026 | Garland Jason K CFO | Other | 327 | $42K | Form 4 |
Douglass Brian Robb
CHIEF PRODUCT OFFICER
Date
May 7
Shares
334
Price
$126.43
Value
$42K
⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About RGEN insider trading
RGEN insider trades
Repligen Corporation (RGEN) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Hunt Anthony (Director), Loeillot Olivier (CEO · Director), Bylund James (COO). Over the past 12 months, 5 insiders have filed transactions with the SEC. RGEN insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For Repligen Corporation's institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
RGEN insider trading · 5 questionsThe insiders of Repligen Corporation (RGEN) include executives and directors such as Hunt Anthony (Director), Loeillot Olivier (CEO · Director), Bylund James (COO), among others. Over the past 12 months, 5 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026