OABIW · OmniAb, Inc.

$0.05 At close · Aug 6

Market Cap

$6.56M

145.39M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Quarter:

Holders: 142

Total Value: $455,259

Total Shares: 72,033,598

Institutional Ownership Trend

16 quarters

Holder Concentration

Across 142 13F filers

Top Holder

46.4%

of institutional value

Top 5

92.4%

of institutional value

Top 10

98.1%

of institutional value

HHI

2,980

Highly concentrated

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +2

Institutional value: —

Shares held: +22.2%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Small Whitefort Capital Management, LP	+6,273,658	20,497,316
Large NOMURA HOLDINGS INC	+4,323,112	5,028,160
Mega BlackRock, Inc.	+790,609	8,897,490
Large RENAISSANCE TECHNOLOGIES LLC	+330,750	600,350
Mid ADAR1 Capital Management, LLC	+242,222	947,412

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega DIMENSIONAL FUND ADVISORS LP	−483,149	1,262,099
Mega CITADEL ADVISORS LLC	−149,394	91,890
Mega VANGUARD CAPITAL MANAGEMENT LLC	−141,296	3,852,356
Mega UBS Group AG	−84,658	37,586
Mid PRIVATE MANAGEMENT GROUP INC	−84,396	2,344,770

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Large Walleye Capital LLC	144,427	$12,998
Small SUMMIT SECURITIES GROUP LLC	7,882	$709
Mid TD PRIVATE CLIENT WEALTH LLC	170	$15
Small Wealth Enhancement Trust Services, Inc.	35	$3
Mid Clearstead Advisors, LLC	29	$0

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Small NINE MASTS CAPITAL Ltd	29,062	$0
Small Legato Capital Management LLC	28,196	$0
Small TWIN PEAKS WEALTH ADVISORS, LLC	58	$0
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	6,243	$0
Small State of Wyoming	24,694	$0

Filter: New 21 Increased 59 Reduced 32 Sold out 19 Unchanged 30

Showing 100 of 145

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

PRIVATE MANAGEMENT GROUP INC

$211,029

46.35%

2,344,770

TOWERVIEW LLC

$106,200

23.33%

1,180,000

ISTHMUS PARTNERS, LLC

$72,308

15.88%

803,428

Calamos Advisors LLC

$18,000

3.95%

200,000

Walleye Capital LLC

$12,998

2.86%

144,427

Cornerstone Capital, Inc.

$12,805

2.81%

142,286

CITIGROUP INC

$4,919

1.08%

54,667

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	54,667	$4,919	100.0%	Defined

Police & Firemen's Retirement System of New Jersey

$3,799

0.83%

42,217

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Capital	42,217	$3,799	100.0%	Defined

WOODSTOCK CORP

$2,643

0.58%

29,376

China Universal Asset Management Co., Ltd.

$2,076

0.46%

23,072

BFSG, LLC

$1,873

0.41%

20,815

Thrive Wealth Management, LLC

$1,624

0.36%

18,046

CHOREO, LLC

$1,100

0.24%

12,232

NEW YORK STATE COMMON RETIREMENT FUND

$1,062

0.23%

11,806

SUMMIT SECURITIES GROUP LLC

$709

0.16%

7,882

Steigerwald, Gordon & Koch Inc.

$690

0.15%

7,673

Mirae Asset Global Investments Co., Ltd.

$583

0.13%

6,484

Jackson, Grant Investment Advisers, Inc.

$220

0.05%

2,450

Sterling Capital Management LLC

$199

0.04%

2,217

SBI Securities Co., Ltd.

$185

0.04%

2,059

North Star Investment Management Corp.

$49

0.01%

550

EverSource Wealth Advisors, LLC

$45

0.01%

521

Dynamic Wealth Strategies, LLC

$36

0.01%

411

SIGNATUREFD, LLC

$32

0.01%

361

Farther Finance Advisors, LLC

$17

0.00%

191

TD PRIVATE CLIENT WEALTH LLC

$15

0.00%

170

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TORONTO DOMINION BANK	170	$15	100.0%	Defined

CENTRAL TRUST Co

$15

0.00%

171

GAMMA Investing LLC

$11

0.00%

128

IFP Advisors, Inc

0.00%

True Wealth Design, LLC

0.00%

Wealth Enhancement Trust Services, Inc.

0.00%

SJS Investment Consulting Inc.

0.00%

MATHER GROUP, LLC.

0.00%

WOLVERINE ASSET MANAGEMENT LLC

—

27,626

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Wolverine Holdings, LLC	27,626	$0	—	Defined

Ameritas Investment Partners, Inc.

—

9,652

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
EATON VANCE MANAGEMENT	9,652	$0	—	Other

TWO SIGMA INVESTMENTS, LP

—

657,432

LPL Financial LLC

—

34,821

AQR CAPITAL MANAGEMENT LLC

—

157,716

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RF&L WEALTH MANAGEMENT, LLC	29	$0	—	Other
Compound Planning, Inc.	2	$0	—	Other
Arax Advisory Partners	586	$0	—	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	717	$0	—	Other
Stokes Family Office, LLC	205	$0	—	Other
Held directly	156,177	$0	—	Defined

Legal & General Group Plc

—

11,284

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Legal & General Investment Management America Inc	11,284	$0	—	Defined

GEODE CAPITAL MANAGEMENT, LLC

—

2,883,978

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	433,075	$0	—	Defined
Held directly	2,450,903	$0	—	Defined

INTECH INVESTMENT MANAGEMENT LLC

—

27,824

Saba Capital Management, L.P.

—

18,000

BRIDGEWAY CAPITAL MANAGEMENT, LLC

—

198,900

SEI INVESTMENTS CO

—

53,390

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SEI INVESTMENTS MANAGEMENT CORP	51,563	$0	—	Sole
SEI TRUST CO	1,827	$0	—	Sole

BANK OF AMERICA CORP /DE/

—

149,493

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	149,493	$0	—	Defined

JANE STREET GROUP, LLC

—

13,200

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	13,200	$0	—	Defined

MORGAN STANLEY

—

371,506

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	434	$0	—	Defined
MORGAN STANLEY & CO. LLC	30,744	$0	—	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	39,198	$0	—	Defined
MORGAN STANLEY SMITH BARNEY LLC	63,045	$0	—	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	238,083	$0	—	Defined
EATON VANCE MANAGEMENT	2	$0	—	Defined

HighTower Advisors, LLC

—

21,609

RENAISSANCE TECHNOLOGIES LLC

—

600,350

RICE HALL JAMES & ASSOCIATES, LLC

—

2,610,434

Arbiter Partners Capital Management LLC

—

192,585

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Broken Clock Management LLC joint	192,585	$0	—	Defined

Caitong International Asset Management Co., Ltd

—

ACADIAN ASSET MANAGEMENT LLC

—

132,385

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	132,385	$0	—	Defined

DIMENSIONAL FUND ADVISORS LP

—

1,262,099

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	10,947	$0	—	Defined
DFA Australia Ltd.	3,168	$0	—	Defined
Dimensional Ireland Ltd	115,773	$0	—	Defined
Held directly	1,132,211	$0	—	Sole

RHUMBLINE ADVISERS

—

171,957

Tower Research Capital LLC (TRC)

—

8,044

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	8,044	$0	—	Defined

Redwood Park Advisors LLC

—

2,184

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

—

966,877

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

—

159,621

CITADEL ADVISORS LLC

—

33,700

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	33,700	$0	—	Defined

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

—

50,644

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Global X Management CO LLC joint	50,644	$0	—	Defined

Larson Financial Group LLC

—

1,444

CADIAN CAPITAL MANAGEMENT, LP

—

4,211,821

Virtu Financial LLC

—

10,565

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Virtu Americas LLC	10,565	$0	—	Defined

Parallel Advisors, LLC

—

1,854

Hudson Bay Capital Management LP

—

465,229

C M BIDWELL & ASSOCIATES LTD

—

233

CANADA PENSION PLAN INVESTMENT BOARD

—

15,100

Quarry LP

—

317

FMR LLC

—

199,818

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	193,243	$0	—	Defined
STRATEGIC ADVISERS LLC	6,575	$0	—	Defined

BLAIR WILLIAM & CO/IL

—

43,394

Russell Investments Group, Ltd.

—

63,783

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC	63,783	$0	—	Defined

Clearstead Advisors, LLC

—

STATE STREET CORP

—

2,133,549

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS EUROPE LIMITED joint	2,133,549	$0	—	Defined

ALLIANCEBERNSTEIN L.P.

—

155,992

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Equitable Holdings, Inc.	155,992	$0	—	Defined

JPMORGAN CHASE & CO

—

107,049

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	45,595	$0	—	Defined
J.P. Morgan Investment Management Inc.	47,602	$0	—	Defined
J.P. Morgan Securities LLC	2,953	$0	—	Defined
J.P. Morgan Securities plc	10,899	$0	—	Defined

IFG Advisory, LLC

—

190

VANGUARD FIDUCIARY TRUST CO

—

758,460

Palumbo Wealth Management LLC

—

161,975

PRICE T ROWE ASSOCIATES INC /MD/

—

80,106

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
T. Rowe Price International Ltd	79,925	$0	—	Defined
Held directly	181	$0	—	Sole

GOLDMAN SACHS GROUP INC

—

384,573

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	122,922	$0	—	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	261,651	$0	—	Defined

MMCAP International Inc. SPC

—

158,333

OMERS ADMINISTRATION Corp

—

10,000

DEUTSCHE BANK AG\

—

100,842

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
DWS Investments UK Ltd	94,842	$0	—	Defined
Held directly	6,000	$0	—	Sole

NISA INVESTMENT ADVISORS, LLC

—

520

BlackRock, Inc.

—

8,897,490

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	36,971	$0	—	Sole
BlackRock Asset Management Canada Ltd	788	$0	—	Sole
BlackRock Investment Management, LLC	308,828	$0	—	Sole
BLACKROCK ADVISORS LLC	252,836	$0	—	Sole
BlackRock Fund Advisors	5,181,299	$0	—	Sole
BlackRock Institutional Trust Company, N.A.	2,924,146	$0	—	Sole
BlackRock Japan Co. Ltd	36,032	$0	—	Sole
BlackRock Asset Management Ireland Ltd	118,819	$0	—	Sole
Aperio Group, LLC	37,771	$0	—	Sole

Vanguard Global Advisers, LLC

—

51,396

NOMURA HOLDINGS INC

—

5,028,160

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NOMURA GLOBAL FINANCIAL PRODUCTS INC	5,028,160	$0	—	Defined

Sculptor Capital LP

—

293,802

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Sculptor Capital II LP joint	293,802	$0	—	Sole

CITADEL ADVISORS LLC

—

58,190

XPONANCE LLC

—

10,472

ROTHSCHILD INVESTMENT LLC

—

154

Qube Research & Technologies Ltd

—

20,186

AMERICAN CENTURY COMPANIES INC

—

75,083

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AMERICAN CENTURY INVESTMENT MANAGEMENT INC	75,083	$0	—	Defined

VICTORY CAPITAL MANAGEMENT INC

—

13,649

VANGUARD CAPITAL MANAGEMENT LLC

—

3,852,356

MANUFACTURERS LIFE INSURANCE COMPANY, THE

—

24,785

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MANULIFE FINANCIAL CORP joint	24,785	$0	—	Defined

MERCER GLOBAL ADVISORS INC /ADV

—

12,357

ROYAL BANK OF CANADA

—

5,219

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	3,303	$0	—	Defined
RBC Capital Markets, LLC	1,915	$0	—	Defined
Held directly	1	$0	—	Sole

ADAR1 Capital Management, LLC

—

947,412

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Thrivent Asset Management, LLC	21,477	$0	—	Defined
Held directly	33,865	$0	—	Sole

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	24,264	$0	—	Defined
BARCLAYS CAPITAL INC.	2,205	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	15,459	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Optiver VOF	848	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Voya Investment Management Co. LLC joint	23,613	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	35,357	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	932,462	$0	—	Defined
DWS INVESTMENT MANAGEMENT AMERICAS, INC joint	15,832	$0	—	Other

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Nuveen Asset Management, LLC joint	1,827	$0	—	Defined
TIAA CREF INVESTMENT MANAGEMENT LLC joint	437,156	$0	—	Defined
TEACHERS ADVISORS, LLC joint	203,828	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
METLIFE INC	65,744	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
LMR PARTNERS (DIFC) Ltd	897,392	$0	—	Sole

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Advisers, Inc. joint	13,649	$0	—	Defined
Invesco Trust Co joint	43,497	$0	—	Defined
Invesco Capital Management LLC	104,230	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PGIM Quantitative Solutions LLC	38,969	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO BANK N A	92,109	$0	—	Defined
WELLS FARGO CLEARING SERVICES, LLC	8,120	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fifth Third Bank, National Association	127	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	73,907	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	3,455	$0	—	Defined
UBS AG	14,154	$0	—	Defined
UBS Securities LLC	19,977	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
D. E. SHAW & CO, L.P.	512,549	$0	—	Defined
D. E. Shaw Investment Management, L.L.C. joint	46,855	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	19,492	$0	—	Other

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Manager 1	65,286	$0	—	Sole
Held directly	7,071	$0	—	Sole

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	35,691	$0	—	Other

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	142,742	$0	—	Defined
The Bank of New York Mellon	175,663	$0	—	Defined
Held directly	1	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Group AG	127	$0	—	Defined

Key facts CIK 1846253 CUSIP 68218J111 13F (30d) 139 filings 137 filers Visit website Investor relations