Omeros
OMER · NASDAQ
$16.55+$0.20 (+1.22%)TodayMarket closed ·
Prev close $16.35
Who owns OMER
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 34.2% of OMER’s shares.
- BlackRock Institutional Trust Company, N.A.7.5%
- Ingalls & Snyder LLC (Asset Management)5.1%
- UBS Financial Services, Inc.4.3%
- Vanguard Capital Management, LLC4.2%
- Next 6 largest institutions13.1%
- All other shareholders65.8%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 5.42M | 7.48% |
| Ingalls & Snyder LLC (Asset Management) | 3.66M | 5.06% |
| UBS Financial Services, Inc. | 3.14M | 4.34% |
| Vanguard Capital Management, LLC | 3.07M | 4.24% |
| State Street Investment Management (US) | 2.32M | 3.21% |
| Geode Capital Management, L.L.C. | 1.91M | 2.65% |
| Stifel, Nicolaus & Company, Incorporated | 1.82M | 2.52% |
| Demopulos (Gregory A. M.D.) | 1.47M | 2.03% |
| Demopulos (Peter A) | 972.90K | 1.34% |
| Vanguard Portfolio Management, LLC | 962.83K | 1.33% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 2.17M | 3.00% |
| iShares Russell 2000 ETF | 1.87M | 2.58% |
| Invesco Biotechnology & Genome ETF | 929.59K | 1.28% |
| State Street SPDR S&P Pharmaceuticals ETF | 837.79K | 1.16% |
| Vanguard Extended Market Index Fund | 832.42K | 1.15% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $2.29M (12 trades) of OMER on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Borges David J. | Option exercise | 10.00K | — |
| Borges David J. | Sale | 10.00K | $209.50K |
| Borges David J. | Option exercise | 10.00K | $155.80K |
| Borges David J. | Option exercise | 5.00K | — |
| Borges David J. | Option exercise | 5.00K | — |
| Borges David J. | Sale | 10.00K | $209.50K |
| Borges David J. | Option exercise | 5.00K | $14.70K |
| Borges David J. | Option exercise | 5.00K | $19.65K |
| Cancelmo Peter B | Option exercise | 25.00K | — |
| Cancelmo Peter B | Sale | 25.00K | $463.54K |
Short interest
Settled Sep 30, 2026
- Shares short
- 11.38M
- Days to cover
- 6.95
- % of shares outstanding
- 15.73%
- Average daily volume
- 1.64M
- Change since last report
- −8.9%
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