DOSSIER · 13F Holders · Q2 2026
OMER

OMEROS CORP

188 institutions still hold OMEROS CORP as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 682143102·188 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$351M
visible holders
Holders
188
filers reporting
Concentration
16.38%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q2 2026

188 institutions reported OMER in Q2 2026. BlackRock, Inc. leads at 16.4% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$57M6.0M0.00%Q2 2026
02
INGALLS & SNYDER LLC
CIK 0001041885
$38M3.6M1.33%Q1 2026
03
UBS Group AG
CIK 0001610520
$30M3.1M0.00%Q2 2026
04
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$29M3.1M0.00%Q2 2026
05
STATE STREET CORP
CIK 0000093751
$22M2.3M0.00%Q2 2026
06
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$21M2.2M0.00%Q2 2026
07
KOTLER KEVIN
CIK 0001601692
$19M1.1M4.53%Q4 2025
08
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$18M1.9M0.00%Q2 2026
09
CITADEL ADVISORS LLC
CIK 0001423053
$18M1.0M0.00%Q4 2025
10
STIFEL FINANCIAL CORP
CIK 0000720672
$17M1.8M0.01%Q2 2026
11
Affinity Asset Advisors, LLC
CIK 0001773195
$13M1.4M0.61%Q2 2026
12
D. E. Shaw & Co., Inc.
CIK 0001009207
$13M755K0.01%Q4 2025
13
Vanguard Portfolio Management
CIK 0002100121· Index
$9M963K0.00%Q2 2026
14
Invesco Ltd.
CIK 0000914208
$7M752K0.00%Q2 2026
15
NORTHERN TRUST CORP
CIK 0000073124· Index
$7M727K0.00%Q2 2026
16
Rock Springs Capital Management LP
CIK 0001595725
$7M718K0.33%Q2 2026
17
Corient Private Wealth LLC
CIK 0001948780
$6M660K0.01%Q2 2026
18
Rubric Capital Management LP
CIK 0001687509
$6M657K0.06%Q2 2026
19
Caption Management, LLC
CIK 0001706766
$6M615K0.03%Q2 2026
20
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$6M605K0.00%Q2 2026
Page 1 of 10
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Insiders at OMEROS CORP
Borges David J.Cancelmo Peter BDemopulos Gregory A MdBumol Thomas F.Cable Thomas J.Demopulos Peter A MdHanish Arnold CHood Leroy E. Md Phd