13F Insight
DOSSIER · 13F Holders · Q1 2026BellwetherCompounder
OABI

OMNIAB INC

135 institutions still hold OMNIAB INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 68218J103·135 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 3.7%
vs prior quarter
13F value held
$79M
56.0% inst. owned
of float
Holders
135
-117 QoQ
filers reporting
Activity
+40 / −51
+962 added · −754 reduced
this quarter
Concentration
28.18%
Whitefort Capital Management, LP #1
top holder share
AI Holders Summary · Q1 2026

135 institutions reported OABI in Q1 2026. Whitefort Capital Management, LP leads at 28.2% of the visible book. -117 net institutions QoQ — distribution reading.

Top holders

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

#HolderValueShares% port.Quarter
01
Whitefort Capital Management, LP
CIK 0001884931
$22M14.2M6.59%Q1 202602
BlackRock, Inc.
CIK 0002012383
$13M8.1M0.00%Q1 202603
CADIAN CAPITAL MANAGEMENT, LP
CIK 0001423686
$7M4.2M0.79%Q1 202604
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$6M4.0M0.00%Q1 202605
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$5M2.9M0.00%Q1 202606
RICE HALL JAMES & ASSOCIATES, LLC
CIK 0001230765
$4M2.5M0.22%Q1 202607
PRIVATE MANAGEMENT GROUP INC
CIK 0001142031
$4M2.4M0.11%Q1 202608
STATE STREET CORP
CIK 0000093751
$3M2.1M0.00%Q1 202609
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$3M1.7M0.00%Q1 202610
TOWERVIEW LLC
CIK 0001166573
$2M1.0M1.01%Q1 202611
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$2M960K0.00%Q1 202612
Vanguard Portfolio Management
CIK 0002100121
$1M904K0.00%Q1 202613
NORTHERN TRUST CORP
CIK 0000073124· Index
$1M881K0.00%Q1 202614
ISTHMUS PARTNERS, LLC
CIK 0001639666
$1M757K0.12%Q1 202615
VANGUARD FIDUCIARY TRUST CO
CIK 0000933478· Index
$1M726K0.00%Q1 202616
ADAR1 Capital Management, LLC
CIK 0001940272
$1M705K0.07%Q1 202617
NOMURA HOLDINGS INC
CIK 0001163653
$1M705K0.00%Q1 202618
Nuveen, LLC
CIK 0001871926
$979,485624K0.00%Q1 202619
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$805,003513K0.00%Q1 202620
Kent Lake PR LLC
CIK 0002037231
$800,000500K0.40%Q3 2025
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