OMEROS CORP
Total Trades
8
Buys
2
Sells
3
Largest Trade
$500K+
Insiders
5
Institutional Funds
117
Inst. Value
$1M+
Activist Filings
12
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Borges David J. | VP, Finance & CAO | SELL | $500K+ | 60K | $12.52 | Jan 14, 2026 |
| Borges David J. | VP, Finance & CAO | EXERCISE | $50K–$100K | 30K | $3.06 | Jan 14, 2026 |
| Demopulos Gregory A MD | Chairman | BUY | $15K–$50K | 15K | $1.68 | Nov 22, 2023 |
| Demopulos Peter A MD | Director | BUY | $15K–$50K | 10K | $1.53 | Nov 18, 2023 |
| HANISH ARNOLD C | Director | EXERCISE | $15K–$50K | 5K | $5.30 | May 23, 2023 |
| HANISH ARNOLD C | Director | SELL | $15K–$50K | 5K | $6.46 | May 23, 2023 |
| Cable Thomas J. | Director | SELL | $15K–$50K | 5K | $6.53 | May 23, 2023 |
| Cable Thomas J. | Director | EXERCISE | $15K–$50K | 5K | $5.30 | May 23, 2023 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 117 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| INGALLS & SNYDER LLC | 3.4M | $1M+ | SH |
| STATE STREET CORP | 1.6M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 1.4M | $1M+ | SH |
| NOMURA HOLDINGS INC | 655K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 593K | $1M+ | SH |
| Ikarian Capital, LLC | 550K | $1M+ | SH (Call) |
| UBS Group AG | 356K | $1M+ | SH |
| Badgley Phelps Wealth Managers, LLC | 264K | $1M+ | SH |
| Informed Momentum Co LLC | 207K | $1M+ | SH |
| Itau Unibanco Holding S.A. | 180K | $1M+ | SH |
| Clutterbuck Capital Management LLC | 150K | $1M+ | SH |
| GROUP ONE TRADING LLC | 133K | $1M+ | SH |
| SIMPLEX TRADING, LLC | 124K | $1M+ | SH |
| MORGAN STANLEY | 122K | $1M+ | SH |
| BARCLAYS PLC | 120K | $1M+ | SH |
| GOLDMAN SACHS GROUP INC | 114K | $1M+ | SH |
| Walleye Capital LLC | 110K | $1M+ | SH |
| HighTower Advisors, LLC | 104K | $1M+ | SH |
| RHUMBLINE ADVISERS | 100K | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 96K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G · Jan 30, 2026
5.7%
4.0M shares
SC 13G/A · Oct 31, 2025
4.9%
3.3M shares
SC 13G/A · Feb 21, 2025
7.2%
4.2M shares
(S) INGALLS & SNYDER, LLC 13-5156620
SC 13G/A · Mar 27, 2024
7.0%
4.4M shares
SC 13G/A · Feb 14, 2024
8.8%
5.7M shares
The Vanguard Group - 23-1945930
SC 13G · Feb 13, 2024
5.0%
3.2M shares
SC 13G · Jan 29, 2024
6.8%
4.3M shares
(S) INGALLS & SNYDER, LLC 13-5156620
SC 13G/A · Feb 17, 2023
6.6%
4.1M shares
SC 13G/A · Feb 14, 2023
8.4%
5.6M shares
SC 13G · Jul 8, 2022
2.0%
1.2M shares
SC 13G/A · Feb 14, 2022
8.1%
5.3M shares
Cormorant Global Healthcare Master Fund, LP
SC 13G/A · Feb 14, 2022
0.0%
0 shares