Omeros Ownership | Who Owns Omeros?
Omeros Ownership Summary
Omeros is owned by 38.47% institutional investors, 2.79% insiders, and 58.75% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 7.64% of OMER shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 3.24% of its assets in Omeros shares.
OMER Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Omeros | 38.47% | 2.79% | 58.75% |
| Sector | Healthcare Stocks | 232.01% | 10.74% | -142.75% |
| Industry | Biotech Stocks | 381.47% | 10.55% | -292.02% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 5.06M | 7.64% | $86.95M |
| Ingalls & snyder | 4.11M | 7.01% | $16.84M |
| Blackrock | 4.10M | 6.98% | $16.65M |
| Vanguard group | 4.01M | 6.06% | $68.93M |
| Ubs group | 2.22M | 3.35% | $38.18M |
| D. e. shaw | 1.84M | 3.17% | $18.17M |
| Stifel financial | 1.81M | 2.73% | $31.08M |
| Polar asset management partners | 1.50M | 2.56% | $6.14M |
| Geode capital management | 1.63M | 2.46% | $28.03M |
| State street | 1.24M | 2.12% | $5.08M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Ingalls & snyder | 4.11M | 0.55% | $16.84M |
| American financial group | 64.11K | 0.40% | $1.10M |
| Eam investors | 207.48K | 0.40% | $3.56M |
| Mindset wealth management | 52.00K | 0.23% | $893.10K |
| Axq capital, lp | 29.15K | 0.11% | $500.67K |
| Breakwater investment management | 17.05K | 0.11% | $292.80K |
| Newbridge financial services group | 34.31K | 0.09% | $589.27K |
| Caitong asset management | 1.93K | 0.09% | $33.20K |
| Badgley phelps wealth managers | 263.56K | 0.08% | $4.53M |
| Stordahl capital management | 22.86K | 0.08% | $392.62K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Ubs group | 2.22M | 0.01% | 1.51M |
| Polar asset management partners | 1.50M | 0.07% | 1.50M |
| Vanguard group | 4.01M | 0.00% | 666.36K |
| Blackrock funding, inc. /de | 5.06M | 0.00% | 610.28K |
| Nomura | 747.28K | 0.01% | 430.93K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Morgan stanley | 386.15K | 0.00% | -1.60M |
| Marshall wace, llp | - | - | -464.18K |
| Jpmorgan chase | 37.19K | - | -378.96K |
| Renaissance | - | - | -344.50K |
| Cormorant asset management, lp | - | - | -300.00K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Polar asset management partners | 1.50M | 0.07% | 1.50M | $6.14M |
| Eam investors | 207.48K | 0.40% | 207.48K | $3.56M |
| Itau unibanco | 180.00K | 0.07% | 180.00K | $3.05M |
| Dimensional fund advisors lp | 96.95K | 0.00% | 96.95K | $1.67M |
| Verition fund management | 63.49K | 0.00% | 63.49K | $1.09M |
Sold Out
| Holder | Change |
|---|---|
| Newedge advisors | -2.00 |
| Nelson, van denburg & campbell wealth management group | -11.00 |
| Geowealth management | -15.00 |
| Clearstead advisors | -26.00 |
| Ameritas advisory services | -31.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Dec 31, 2025 | 112 | -24.83% | 25,489,475 | -22.41% | 38 | 1.22% | 62 | -18.42% | 21 | -32.26% |
| Sep 30, 2025 | 145 | 6.62% | 32,822,868 | 12.91% | 56 | 2.23% | 74 | 17.46% | 30 | -16.67% |
| Jun 30, 2025 | 135 | -9.40% | 29,054,060 | 5.39% | 50 | 2.22% | 64 | 10.34% | 34 | -34.62% |
| Mar 31, 2025 | 2 | -98.58% | 315,252 | -98.81% | - | 0.03% | 1 | -98.80% | 1 | -96.15% |
| Dec 31, 2024 | 49 | -58.47% | 13,849,257 | -44.67% | 23 | 1.28% | 28 | -36.36% | 9 | -73.53% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard US Total Market Shares ETF | 1.88M | 3.24% | - |
| Vanguard Total Stock Mkt Idx Inv | 2.10M | 2.96% | 69.40K |
| iShares Russell 2000 ETF | 1.61M | 2.27% | 1.61M |
| Vanguard Institutional Extnd Mkt Idx Tr | 769.21K | 1.08% | 3.32K |
| Fidelity Small Cap Index | 658.26K | 0.93% | 7.91K |
| iShares Russell 2000 Growth ETF | 494.28K | 0.70% | 287.78K |
| State St Russell Sm/Mid Cp® Indx NL Cl C | 351.77K | 0.60% | 1.59K |
| iShares Russell 2000 Value ETF | 339.15K | 0.58% | - |
| State St Russell Sm/Mid Cp® Indx SL Cl I | 395.77K | 0.56% | - |
| Fidelity Extended Market Index | 373.59K | 0.53% | -7.33K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Jan 13, 2026 | Borges David J. | VP, Finance & CAO | Sell | $369.31K |
| Jan 12, 2026 | Borges David J. | VP, Finance & CAO | Sell | $381.60K |
| Nov 17, 2023 | Demopulos Gregory A MD | Chairman, CEO & President | Buy | $25.20K |
| Nov 15, 2023 | Demopulos Peter A MD | - | Buy | $15.30K |
| May 22, 2023 | HANISH ARNOLD C | - | Sell | $32.30K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q1 | - | 2 |
| 2025 Q4 | - | - |
| 2025 Q2 | - | - |
| 2024 Q2 | - | - |
| 2023 Q4 | 2 | - |
OMER Ownership FAQ
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