Who Owns OmniAb, Inc. (OABI)?Hedge Fund & Institutional Holders

$1.77-0.07 (-4.05%)HealthcareNASDAQ

Institutional Holders

50

as of Q4 2025

Total Institutional Value

$2.6313897282047998e+126T

% of Float Held

—

QoQ Change in Holders

+15 / -1

Price History

$1.25$2.12$2.99$3.86$4.73Sep 24Jun 25Mar 26

OABI — Biggest New Institutional Buyers This Quarter

FundActionShares AddedValue Added
RICE HALL JAMES & ASSOCIATES, LLCNew Position+2.4M+$4.4M
TOWERVIEW LLCNew Position+1.0M+$1.9M
TLS Advisors LLCNew Position+70K+$137K
SG Americas Securities, LLCNew Position+23K+$43K
BFSG, LLCNew Position+20K+$37K
State of WyomingNew Position+12K+$22K
Steigerwald, Gordon & Koch Inc.New Position+8K+$14K
Mirae Asset Global Investments Co., Ltd.New Position+7K+$12K
CWM, LLCNew Position+2K+$5K
Spire Wealth ManagementNew Position+1K+$2K
North Star Investment Management Corp.New Position+550+$1K
Cheviot Value Management, LLCNew Position+980+$1K
MAI Capital ManagementNew Position+7K+$0
NOMURA HOLDINGS INCNew Position+155K+$0
FARMERS & MERCHANTS INVESTMENTS INCNew Position+53+$0

OABI — Institutions Reducing or Closing Positions

FundActionShares SoldValue Sold
Woodline Partners LPDecreased-2.6M-$4.6B
DIMENSIONAL FUND ADVISORS LPDecreased-396K-$4.1B
PRIVATE MANAGEMENT GROUP INCDecreased-98K-$4.0B
Stonepine Capital Management, LLCDecreased-1.4M-$3.4B
STATE STREET CORPDecreased-46K-$3.3B
ADAR1 Capital Management, LLCDecreased-388K-$1.7B
JACOBS LEVY EQUITY MANAGEMENT, INCDecreased-768K-$1.6B
CITADEL ADVISORS LLCDecreased-552K-$1.3B
MORGAN STANLEYDecreased-431K-$1.3B
JPMORGAN CHASE & CODecreased-470K-$1.2B
GOLDMAN SACHS GROUP INCDecreased-48K-$940.5M
RENAISSANCE TECHNOLOGIES LLCDecreased-281K-$837.5M
Kent Lake PR LLCClosed Position-500K-$800.0M
WOODSTOCK CORPDecreased-317K-$562.7M
ROYAL BANK OF CANADADecreased-298K-$485.0M

Top Institutional Holders(Q4 2025)

#FundSharesValue% of PortfolioType
1Whitefort Capital Management, LP14,223,658$26.3M6.73%Share
2VANGUARD GROUP INC4,850,008$9.0M0.00%Share
3CADIAN CAPITAL MANAGEMENT, LP4,434,954$8.2M0.59%Share
4BlackRock, Inc.4,732,445$8.0M0.00%Share
5PRIVATE MANAGEMENT GROUP INC2,420,478$4.5M0.13%Share
6RICE HALL JAMES & ASSOCIATES, LLC2,401,088$4.4M0.24%Share
7GEODE CAPITAL MANAGEMENT, LLC2,328,624$4.0M0.00%Share
8BlackRock, Inc.2,656,962$4.0M0.00%Share
9DIMENSIONAL FUND ADVISORS LP2,001,376$3.0M0.00%Share
10STATE STREET CORP2,048,996$3.0M0.00%Share
11TOWERVIEW LLC1,000,000$1.9M1.34%Share
12VANGUARD GROUP INC723,793$1.3M0.00%Share
13ISTHMUS PARTNERS, LLC721,309$1.3M0.15%Share
14ADAR1 Capital Management, LLC702,190$1.3M0.09%Share
15Stonepine Capital Management, LLC701,000$1.3M0.95%Share
16MILLENNIUM MANAGEMENT LLC673,395$1.0M0.00%Share
17Nuveen, LLC688,720$1.0M0.00%Share
18NORTHERN TRUST CORP806,662$1.0M0.00%Share
19CHARLES SCHWAB INVESTMENT MANAGEMENT INC966,026$1.0M0.00%Share
20Arbiter Partners Capital Management LLC192,585$356K0.17%Share
21Cornerstone Capital, Inc.109,211$202K0.02%Share
22Invesco Ltd.105,351$194K0.00%Share
23TLS Advisors LLC70,000$137K0.36%Share
24CONNORS INVESTOR SERVICES INC61,941$114K0.01%Share
25UBS Group AG61,396$113K0.00%Share
26VANGUARD GROUP INC51,396$95K0.00%Share
27WOODSTOCK CORP35,240$65K0.01%Share
28Legato Capital Management LLC30,679$56K0.00%Share
29China Universal Asset Management Co., Ltd.23,457$43K0.00%Share
30SG Americas Securities, LLC23,141$43K0.00%Share
31BBR PARTNERS, LLC20,000$37K0.00%Share
32BFSG, LLC20,435$37K0.00%Share
33Thrive Wealth Management, LLC17,281$31K0.00%Share
34Invesco Ltd.14,646$27K0.00%Share
35Invesco Ltd.14,267$26K0.00%Share
36State of Wyoming12,243$22K0.00%Share
37CHOREO, LLC10,451$19K0.00%Share
38Avior Wealth Management, LLC10,704$19K0.00%Share
39Steigerwald, Gordon & Koch Inc.7,673$14K0.00%Share
40Mirae Asset Global Investments Co., Ltd.6,995$12K0.00%Share
41UBS Group AG6,329$11K0.00%Share
42GF FUND MANAGEMENT CO. LTD.2,828$5K0.00%Share
43CWM, LLC2,493$5K0.00%Share
44Redwood Park Advisors LLC2,184$4K0.00%Share
45Jackson, Grant Investment Advisers, Inc.2,450$4K0.00%Share
46EverSource Wealth Advisors, LLC1,664$3K0.00%Share
47Allworth Financial LP2,127$3K0.00%Share
48Invesco Ltd.2,045$3K0.00%Share
49Optiver Holding B.V.1,256$2K0.00%Share
50Spire Wealth Management1,200$2K0.00%Share

OABI Institutional Ownership History

QuarterHoldersTotal ValueChange
Q4 2025127$87.2M+17
Q3 2025110$93.7B-13
Q2 2025123$83.7B-30
Q1 2025153$150.4B-5
Q4 2024158$31.3T+26
Q3 2024132$161.1T+6
Q2 2024126$108.2T+5
Q1 2024121$159.2T—

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As of Q4 2025, 50 institutional investors hold OABI (OmniAb, Inc.). The largest holder is Whitefort Capital Management, LP with $26.3M in shares. This quarter, 15 institutions opened new positions and 1 closed their positions.

Frequently Asked Questions

How many hedge funds own OABI?

As of Q4 2025, 50 institutional investors report holding OABI (OmniAb, Inc.) in their 13F filings.

Who is the largest institutional holder of OABI?

The largest institutional holder of OABI is Whitefort Capital Management, LP with $26.3M in shares.

Is institutional ownership of OABI increasing or decreasing?

This quarter, 15 institutions opened new positions in OABI and 1 closed their positions.