SEATTLE, WA
OMEROS CORPOMER— Latest position per institution from SEC 13F filings
15
Institutional holders
41.79M
Total shares held
377.63M
Estimated value
2.09M
Avg. position size
BLACKROCK, INC.
CIK 2012383
Shares
6.04M
Value
57.48M
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
4.10M
Value
16.65M
Filed
Jun 30, 2024
VANGUARD GROUP INC
CIK 102909
Shares
4.01M
Value
68.93M
Filed
Dec 31, 2025
INGALLS & SNYDER LLC
CIK 1041885
Shares
3.66M
Value
34.80K
Filed
Jun 30, 2026
UBS GROUP AG
CIK 1610520
Shares
3.15M
Value
29.94M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
3.07M
Value
29.22M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
2.32M
Value
22.06M
Filed
Jun 30, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 1446194
Shares
2.22M
Value
21.07M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
1.91M
Value
18.21M
Filed
Jun 30, 2026
STIFEL FINANCIAL CORP
CIK 720672
Shares
1.84M
Value
17.47M
Filed
Jun 30, 2026
IKARIAN CAPITAL, LLC
CIK 1778253
Shares
1.50M
Value
25.76M
Filed
Dec 31, 2025
AFFINITY ASSET ADVISORS, LLC
CIK 1773195
Shares
1.41M
Value
13.42M
Filed
Jun 30, 2026
KOTLER KEVIN
CIK 1601692
Shares
1.12M
Value
19.35M
Filed
Dec 31, 2025
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
962.83K
Value
9.16M
Filed
Jun 30, 2026
CITADEL ADVISORS LLC
CIK 1423053
Shares
829.99K
Value
7.89M
Filed
Jun 30, 2026
INVESCO LTD.
CIK 914208
Shares
751.77K
Value
7.15M
Filed
Jun 30, 2026
NORTHERN TRUST CORP
CIK 73124
Shares
727.35K
Value
6.92M
Filed
Jun 30, 2026
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
CIK 1081019
Shares
720.19K
Value
75.73K
Filed
Jun 30, 2026
ROCK SPRINGS CAPITAL MANAGEMENT LP
CIK 1595725
Shares
718.50K
Value
6.83M
Filed
Jun 30, 2026
CPWM, LLC
CIK 1697457
Shares
716.89K
Value
2.26K
Filed
Sep 30, 2022
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK, INC. | 2012383 | 6.04M | 57.48M | Jun 30, 2026 |
| 2 | BLACKROCK FINANCE, INC. | 1364742 | 4.10M | 16.65M | Jun 30, 2024 |
| 3 | VANGUARD GROUP INC | 102909 | 4.01M | 68.93M | Dec 31, 2025 |
| 4 | INGALLS & SNYDER LLC | 1041885 | 3.66M | 34.80K | Jun 30, 2026 |
| 5 | UBS GROUP AG | 1610520 | 3.15M | 29.94M | Jun 30, 2026 |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 3.07M | 29.22M | Jun 30, 2026 |
| 7 | STATE STREET CORP | 93751 | 2.32M | 22.06M | Jun 30, 2026 |
| 8 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1446194 | 2.22M | 21.07M | Jun 30, 2026 |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 1.91M | 18.21M | Jun 30, 2026 |
| 10 | STIFEL FINANCIAL CORP | 720672 | 1.84M | 17.47M | Jun 30, 2026 |
| 11 | IKARIAN CAPITAL, LLC | 1778253 | 1.50M | 25.76M | Dec 31, 2025 |
| 12 | AFFINITY ASSET ADVISORS, LLC | 1773195 | 1.41M | 13.42M | Jun 30, 2026 |
| 13 | KOTLER KEVIN | 1601692 | 1.12M | 19.35M | Dec 31, 2025 |
| 14 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 962.83K | 9.16M | Jun 30, 2026 |
| 15 | CITADEL ADVISORS LLC | 1423053 | 829.99K | 7.89M | Jun 30, 2026 |
| 16 | INVESCO LTD. | 914208 | 751.77K | 7.15M | Jun 30, 2026 |
| 17 | NORTHERN TRUST CORP | 73124 | 727.35K | 6.92M | Jun 30, 2026 |
| 18 | CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 1081019 | 720.19K | 75.73K | Jun 30, 2026 |
| 19 | ROCK SPRINGS CAPITAL MANAGEMENT LP | 1595725 | 718.50K | 6.83M | Jun 30, 2026 |
| 20 | CPWM, LLC | 1697457 | 716.89K | 2.26K | Sep 30, 2022 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.