Latest Period
Q1 2026
Security Snapshot
OMEROS CORP - COMMON STOCK (OMER) Institutional Ownership
CUSIP: 682143102
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
159
Shares (Excl. Options)
30,747,288
Price
$10.56
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- Security type / class
- Equity / COMMON STOCK
- Symbol
- OMER on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 30,747,288
- Total 13F value
- $324,723,959
- Portfolio coverage rank
- 0%
- Share change
- -1,697,805
- Value change
- -$23,015,823
- Number of holders
- 159
- Shares outstanding
- 72,213,917
- SEC-reported price per share
- $11.15
- Insider filing price
- $11.15
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- OMER - OMEROS CORP - COMMON STOCK is tracked under CUSIP 682143102.
- 159 institutions reported positions in Q1 2026.
- 1 significant owner is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 151 to 159 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $570,206,725 to $324,723,959.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 159 institutions filings for Q1 2026.
Security key
682143102
Latest holder period
Q1 2026
13F holders
159
13D/G owners
1
CIK / CUSIP context first
Open Q1 2026 holders
OMER full holder history
OMEROS CORP SEC filings
OMEROS CORP company facts
OMEROS CORP insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 682143102:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
1
Security
OMER
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| INGALLS & SNYDER LLC | 4.8% | -34% | $36,604,830 | -$7,339,905 | 3,466,268 | -17% | INGALLS & SNYDER LLC | 31 Dec 2025 |
As of 31 Mar 2026, 159 institutional investors reported holding 30,747,288 shares of OMEROS CORP - COMMON STOCK (OMER). This represents 43% of the company’s total 72,213,917 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
37%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 7.4% | 5,309,626 | +4.9% | 0% | $56,069,647 |
| INGALLS & SNYDER LLC | 4.9% | 3,559,423 | +3.2% | 1.3% | $37,588,000 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.1% | 2,983,259 | 0% | 0% | $31,503,215 |
| UBS Group AG | 3.2% | 2,340,731 | +5.3% | 0% | $24,718,119 |
| STATE STREET CORP | 2.7% | 1,919,575 | +22% | 0% | $20,270,712 |
| STIFEL FINANCIAL CORP | 2.5% | 1,831,585 | +1.2% | 0.02% | $19,341,544 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 1,752,323 | +7.4% | 0% | $18,509,126 |
| Corient Private Wealth LLC | 1.1% | 801,411 | +16% | 0.01% | $8,462,901 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1% | 718,675 | 0% | 0% | $7,589,208 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.81% | 582,512 | -1.8% | 0% | $6,151,327 |
| BANK OF MONTREAL /CAN/ | 0.79% | 568,426 | -5.5% | 0% | $6,002,578 |
| NORTHERN TRUST CORP | 0.78% | 563,867 | +7.1% | 0% | $5,954,435 |
| VANGUARD FIDUCIARY TRUST CO | 0.68% | 492,345 | 0% | 0% | $5,199,163 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0.67% | 485,030 | -35% | 0.01% | $5,121,917 |
| MILLENNIUM MANAGEMENT LLC | 0.57% | 410,609 | -7.1% | 0% | $4,336,031 |
| MORGAN STANLEY | 0.44% | 317,892 | -18% | 0% | $3,356,940 |
| Clutterbuck Capital Management LLC | 0.42% | 300,000 | +100% | 1.9% | $3,168,000 |
| TWO SIGMA INVESTMENTS, LP | 0.4% | 286,474 | -45% | 0% | $3,025,165 |
| Badgley Phelps Wealth Managers, LLC | 0.36% | 263,556 | 0% | 0.06% | $2,783,152 |
| CITADEL ADVISORS LLC | 0.36% | 260,048 | +8.2% | 0% | $2,746,107 |
| BANK OF AMERICA CORP /DE/ | 0.28% | 204,805 | +78% | 0% | $2,162,741 |
| GOLDMAN SACHS GROUP INC | 0.28% | 202,893 | -11% | 0% | $2,142,550 |
| Polar Asset Management Partners Inc. | 0.28% | 200,000 | +191% | 0.05% | $2,112,000 |
| Jump Financial, LLC | 0.27% | 195,824 | -14% | 0.03% | $2,067,901 |
| WELLINGTON MANAGEMENT GROUP LLP | 0.26% | 187,300 | -7.6% | 0% | $1,977,887 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 30,747,288 | $324,723,959 | -$23,015,823 | $10.56 | 159 |
| 2025 Q4 | 33,208,453 | $570,206,725 | +$6,800,930 | $17.18 | 151 |
| 2025 Q3 | 32,836,318 | $134,581,239 | +$15,288,802 | $4.10 | 131 |
| 2025 Q2 | 29,070,740 | $87,223,943 | +$2,273,539 | $3.00 | 125 |
| 2025 Q1 | 27,567,515 | $226,581,675 | +$7,577,920 | $8.22 | 136 |
| 2024 Q4 | 26,557,460 | $262,301,855 | +$14,547,060 | $9.88 | 128 |
| 2024 Q3 | 25,028,393 | $99,334,168 | +$134,504 | $3.97 | 108 |
| 2024 Q2 | 24,952,386 | $101,360,144 | -$1,926,321 | $4.06 | 104 |
| 2024 Q1 | 25,442,708 | $87,800,583 | +$1,744,044 | $3.45 | 99 |
| 2023 Q4 | 24,934,579 | $81,671,960 | -$6,212,868 | $3.27 | 97 |
| 2023 Q3 | 26,962,290 | $78,889,421 | -$548,505 | $2.92 | 99 |
| 2023 Q2 | 26,218,040 | $142,820,753 | +$31,895,859 | $5.44 | 103 |
| 2023 Q1 | 20,410,989 | $94,907,120 | +$6,264,086 | $4.65 | 90 |
| 2022 Q4 | 18,940,581 | $42,804,746 | -$2,530,643 | $2.26 | 94 |
| 2022 Q3 | 20,467,966 | $64,677,945 | -$9,768,089 | $3.15 | 88 |
| 2022 Q2 | 23,156,221 | $63,878,574 | -$18,491,343 | $2.75 | 93 |
| 2022 Q1 | 28,773,729 | $173,191,574 | -$11,338,842 | $6.01 | 126 |
| 2021 Q4 | 29,895,672 | $192,479,545 | -$15,061,374 | $6.43 | 128 |
| 2021 Q3 | 29,738,972 | $411,859,511 | -$25,783,157 | $13.79 | 137 |
| 2021 Q2 | 32,206,918 | $478,330,095 | -$40,537,441 | $14.84 | 146 |
| 2021 Q1 | 34,754,657 | $618,556,571 | +$9,528,433 | $17.80 | 148 |
| 2020 Q4 | 34,309,690 | $491,009,495 | -$7,202,867 | $14.28 | 130 |
| 2020 Q3 | 34,911,239 | $353,094,849 | +$28,000,378 | $10.10 | 133 |
| 2020 Q2 | 31,800,513 | $467,894,511 | +$8,008,700 | $14.72 | 115 |
| 2020 Q1 | 31,179,601 | $416,709,433 | +$46,931,533 | $13.37 | 119 |