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RGEN · NASDAQ
Who owns RGEN
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 44.0% of RGEN’s shares.
- BlackRock Institutional Trust Company, N.A.8.6%
- United Capital Financial Advisors, LLC4.9%
- Roy T. Eddleman UEO4.8%
- Fidelity Management & Research Company LLC4.7%
- Next 6 largest institutions20.9%
- All other shareholders56.0%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 4.83M | 8.56% |
| United Capital Financial Advisors, LLC | 2.79M | 4.94% |
| Roy T. Eddleman UEO | 2.74M | 4.85% |
| Fidelity Management & Research Company LLC | 2.65M | 4.69% |
| Vanguard Capital Management, LLC | 2.41M | 4.27% |
| Vanguard Portfolio Management, LLC | 2.31M | 4.10% |
| Maverick Capital, Ltd. | 1.98M | 3.52% |
| State Street Investment Management (US) | 1.80M | 3.19% |
| T. Rowe Price Associates, Inc. | 1.69M | 3.00% |
| MFS Investment Management | 1.61M | 2.86% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Mid-Cap ETF | 1.86M | 3.29% |
| Vanguard Total Stock Market Index Fund | 1.71M | 3.03% |
| Vanguard Small-Cap Index Fund | 1.23M | 2.18% |
| MFS Mid Cap Growth Fund | 961.23K | 1.70% |
| T. Rowe Price New Horizons Fund | 854.73K | 1.51% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $6.68M (10 trades) of RGEN on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Douglass Brian Robb | Award | 675 | — |
| Douglass Brian Robb | Award | 700 | — |
| Loeillot Olivier | Option exercise | 4.20K | — |
| Loeillot Olivier | Sale | 4.20K | $798.38K |
| Loeillot Olivier | Option exercise | 4.20K | $651.14K |
| Loeillot Olivier | Sale | 1.33K | $238.27K |
| Loeillot Olivier | Tax withholding | 1.25K | $226.76K |
| Garland Jason K | Tax withholding | 421 | $79.86K |
| Loeillot Olivier | Option exercise | 4.54K | — |
| Loeillot Olivier | Option exercise | 8.40K | — |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Lisa McClainHouse | Sale | $1K–$15K | Oct 31, 2025 |
| Lisa McClainHouse | Sale | $1K–$15K | Oct 30, 2025 |
| Lisa McClainHouse | Purchase | $1K–$15K | Oct 30, 2025 |
Short interest
Settled Sep 30, 2026
- Shares short
- 7.58M
- Days to cover
- 6.61
- % of shares outstanding
- 13.43%
- Average daily volume
- 1.15M
- Change since last report
- +12.9%
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