OmniAb, Inc. (OABI) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

864,997Shares held by institutions

$1,349,395Value of institutional holdings

59.45%Institutional ownership %

49.45%Shares Changed QoQ

141No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

OmniAb, Inc. (NASDAQ:OABI) showed up in the 13F filings of 125 institutional investors as of December 2025.

Collectively, these holders controlled 50.5% of OmniAb's outstanding shares in December 2025, down from 55.6% in September 2025.
They decreased total shares held in OmniAb by -6.79% from last quarter, and the number of investors in OABI decreased 22.84% annually.
Of these 125 holders, 54 added to their stakes in OmniAb, 38 trimmed positions, and 33 made no changes.
Institutional investors collectively held 57.9Mn shares in OmniAb as of December 2025, down by 4.21Mn shares quarter on quarter, and down 7.24Mn shares year over year.
As of December 31, 2025, the biggest holder of OmniAb is Whitefort Capital Management, LP at 14.22Mn shares, representing 12.4% of shares outstanding.
The biggest buyers of OmniAb for the quarter ending December 2025 included BlackRock, Inc. (1.1Mn), CADIAN CAPITAL MANAGEMENT, LP (759.39K), VANGUARD GROUP INC (477.14K), GEODE CAPITAL MANAGEMENT, LLC (396.46K), MILLENNIUM MANAGEMENT LLC (387.59K).
The biggest sellers of OmniAb for the quarter ending December 2025 included Woodline Partners LP (2.57Mn), Stonepine Capital Management, LLC (1.44Mn), Jpmorgan Chase & Co (1.23Mn), JACOBS LEVY EQUITY MANAGEMENT, INC (768.07K), CITADEL ADVISORS LLC (551.66K).
Per Business Quant, the top 10 investors in OABI for the quarter ending December 2025 include Whitefort Capital Management, LP (14.22Mn), BlackRock, Inc. (8.06Mn), VANGUARD GROUP INC (5.63Mn), CADIAN CAPITAL MANAGEMENT, LP (4.43Mn), GEODE CAPITAL MANAGEMENT, LLC (2.72Mn), PRIVATE MANAGEMENT GROUP INC (2.42Mn), RICE HALL JAMES & ASSOCIATES, LLC (2.4Mn), DIMENSIONAL FUND ADVISORS LP (2.15Mn), State Street Corp (2.05Mn), ADAR1 Capital Management, LLC (1.4Mn).

125 Institutional Holders

864,997 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	1,100,759	15.81%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	477,136	9.27%	$0.00
Whitefort Capital Management, LP	31 Dec, 2025	0	0.00%	$0.00
Barclays Plc	31 Dec, 2025	-121,368	-42.30%	$0.00
CADIAN CAPITAL MANAGEMENT, LP	31 Dec, 2025	759,386	20.66%	$0.00
ADAR1 Capital Management, LLC	31 Dec, 2025	313,752	28.77%	$0.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	396,456	17.04%	$0.00
Nuveen, LLC	31 Dec, 2025	2	0.00%	$0.00
PRIVATE MANAGEMENT GROUP INC	31 Dec, 2025	-97,801	-3.88%	$0.00
ISTHMUS PARTNERS, LLC	31 Dec, 2025	52,238	7.81%	$0.00
RICE HALL JAMES & ASSOCIATES, LLC	31 Dec, 2025	-10,950	-0.45%	$0.00
Woodline Partners LP	31 Dec, 2025	-2,571,428	-90.00%	$0.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	-395,691	-15.53%	$0.00
TLS Advisors LLC	31 Dec, 2025	-180,185	-72.02%	$0.00
State Street Corp	31 Dec, 2025	-45,850	-2.19%	$0.00
UBS Group AG	31 Dec, 2025	28,310	71.37%	$0.00
TOWERVIEW LLC	31 Dec, 2025	168,900	20.32%	$0.00
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	31 Dec, 2025	5,395	12.42%	$0.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	180,549	22.99%	$0.00
Vanguard Personalized Indexing Management, LLC	31 Dec, 2025	-10,257	-24.60%	$0.00

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