SEATTLE, WA
OMEROS CORPOMER— Latest position per institution from SEC 13F filings
15
Institutional holders
37.64M
Total shares held
362.32M
Estimated value
1.88M
Avg. position size
BLACKROCK, INC.
CIK 2012383
Shares
5.31M
Value
56.07M
Filed
Mar 31, 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
3.56M
Value
37.59K
Filed
Mar 31, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
2.98M
Value
31.50M
Filed
Mar 31, 2026
UBS GROUP AG
CIK 1610520
Shares
2.34M
Value
24.72M
Filed
Mar 31, 2026
STATE STREET CORP
CIK 93751
Shares
1.92M
Value
20.27M
Filed
Mar 31, 2026
STIFEL FINANCIAL CORP
CIK 720672
Shares
1.83M
Value
19.34M
Filed
Mar 31, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
1.75M
Value
18.51M
Filed
Mar 31, 2026
IKARIAN CAPITAL, LLC
CIK 1778253
Shares
1.50M
Value
25.76M
Filed
Dec 31, 2025
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 1446194
Shares
1.40M
Value
14.83M
Filed
Mar 31, 2026
AFFINITY ASSET ADVISORS, LLC
CIK 1773195
Shares
1.13M
Value
4.65M
Filed
Sep 30, 2025
KOTLER KEVIN
CIK 1601692
Shares
1.12M
Value
19.35M
Filed
Dec 31, 2025
CORIENT PRIVATE WEALTH LLC
CIK 1948780
Shares
801.41K
Value
8.46M
Filed
Mar 31, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
718.67K
Value
7.59M
Filed
Mar 31, 2026
CPWM, LLC
CIK 1697457
Shares
716.89K
Value
2.26K
Filed
Sep 30, 2022
CITADEL ADVISORS LLC
CIK 1423053
Shares
714.15K
Value
7.54M
Filed
Mar 31, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 884546
Shares
582.51K
Value
6.15M
Filed
Mar 31, 2026
BANK OF MONTREAL /CAN/
CIK 927971
Shares
568.43K
Value
6M
Filed
Mar 31, 2026
NORTHERN TRUST CORP
CIK 73124
Shares
563.87K
Value
5.95M
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK, INC. | 2012383 | 5.31M | 56.07M | Mar 31, 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 | 3.56M | 37.59K | Mar 31, 2026 |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 2.98M | 31.50M | Mar 31, 2026 |
| 6 | UBS GROUP AG | 1610520 | 2.34M | 24.72M | Mar 31, 2026 |
| 7 | STATE STREET CORP | 93751 | 1.92M | 20.27M | Mar 31, 2026 |
| 8 | STIFEL FINANCIAL CORP | 720672 | 1.83M | 19.34M | Mar 31, 2026 |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 1.75M | 18.51M | Mar 31, 2026 |
| 10 | IKARIAN CAPITAL, LLC | 1778253 | 1.50M | 25.76M | Dec 31, 2025 |
| 11 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1446194 | 1.40M | 14.83M | Mar 31, 2026 |
| 12 | AFFINITY ASSET ADVISORS, LLC | 1773195 | 1.13M | 4.65M | Sep 30, 2025 |
| 13 | KOTLER KEVIN | 1601692 | 1.12M | 19.35M | Dec 31, 2025 |
| 14 | CORIENT PRIVATE WEALTH LLC | 1948780 | 801.41K | 8.46M | Mar 31, 2026 |
| 15 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 718.67K | 7.59M | Mar 31, 2026 |
| 16 | CPWM, LLC | 1697457 | 716.89K | 2.26K | Sep 30, 2022 |
| 17 | CITADEL ADVISORS LLC | 1423053 | 714.15K | 7.54M | Mar 31, 2026 |
| 18 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 884546 | 582.51K | 6.15M | Mar 31, 2026 |
| 19 | BANK OF MONTREAL /CAN/ | 927971 | 568.43K | 6M | Mar 31, 2026 |
| 20 | NORTHERN TRUST CORP | 73124 | 563.87K | 5.95M | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.