13F Insight
DOSSIER · 13F Holders · Q4 2025Inflation hedgeYield
OMER 9.5 06/15/29

OMEROS CORP

7 institutions still hold OMEROS CORP as of Q4 2025. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 682143AK8·7 13F holders·last filed Dec 31, 2025
Market cap
—
▲ 9.2%
vs prior quarter
13F value held
$155M
55.0% inst. owned
of float
Holders
7
+119 QoQ
filers reporting
Activity
+49 / −115
+869 added · −824 reduced
this quarter
Concentration
25.92%
D. E. Shaw & Co., Inc. #1
top holder share
AI Holders Summary · Q4 2025

7 institutions reported OMER 9.5 06/15/29 in Q4 2025. D. E. Shaw & Co., Inc. leads at 25.9% of the visible book. +119 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
D. E. Shaw & Co., Inc.
CIK 0001009207
$40M13.4M0.02%Q4 202502
WHITEBOX ADVISORS LLC
CIK 0001257391
$36M18.0M0.45%Q1 202603
DeepCurrents Investment Group LLC
CIK 0001754535
$32M15.9M1.02%Q1 202604
Context Capital Management, LLC
CIK 0001301396
$25M12.2M0.57%Q1 202605
Affinity Asset Advisors, LLC
CIK 0001773195
$13M6.5M0.68%Q1 202606
Clutterbuck Capital Management LLC
CIK 0001517638
$9M4.2M5.42%Q1 202607
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025