OmniAb Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NasdaqGM:OABI Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Role	Shares	Max Price
07 Nov 25	BuyUS$107,707	John Higgins	Individual		77,261	US$1.41
26 Aug 25	BuyUS$999,999	Matthew Foehr	Individual		540,540	US$1.85

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of OABI?
Owner Type	Number of Shares	Ownership Percentage
Hedge Funds	14,223,658	9.81%
VC/PE Firms	15,862,815	10.9%
Individual Insiders	17,356,186	12%
Institutions	48,330,479	33.3%
General Public	49,199,441	33.9%

Dilution of Shares: Shareholders have been diluted in the past year, with total shares outstanding growing by 18.5%.

Top Shareholders

Top 25 shareholders own 60.25% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
10.9%	Avista Capital Holdings, L.P.	15,862,815	US$42.0m	0%	100.0%
9.81%	Whitefort Capital Management, LP	14,223,658	US$37.7m	0%	9.69%
5.59%	BlackRock, Inc.	8,106,881	US$21.5m	0.52%	no data
5.21%	Robert Goldstein	7,557,202	US$20.0m	0%	no data
3.27%	Gotham Asset Management, LLC	4,734,770	US$12.5m	0%	0.03%
3.05%	Matthew Foehr	4,420,492	US$11.7m	0.39%	no data
2.87%	Cadian Capital Management, LP	4,157,129	US$11.0m	-6.26%	0.73%
2.75%	Vanguard Capital Management, LLC	3,993,652	US$10.6m	0%	no data
2.03%	John Higgins	2,942,320	US$7.8m	27.1%	no data
2.02%	Geode Capital Management, LLC	2,925,579	US$7.8m	7.45%	no data
1.76%	Rice Hall James & Associates, LLC	2,547,255	US$6.8m	6.09%	0.36%
1.68%	Private Management Group Inc	2,429,166	US$6.4m	0.36%	0.18%
1.43%	State Street Global Advisors, Inc.	2,067,143	US$5.5m	0.89%	no data
1.2%	Dimensional Fund Advisors LP	1,745,248	US$4.6m	-18.9%	no data
0.99%	Joel Greenblatt	1,429,766	US$3.8m	0%	no data
0.69%	TowerView LLC	1,000,000	US$2.7m	0%	1.59%
0.66%	Charles Schwab Investment Management, Inc.	959,573	US$2.5m	-0.67%	no data
0.65%	Janus Henderson Group plc	948,434	US$2.5m	0%	no data
0.62%	Vanguard Portfolio Management, LLC	903,799	US$2.4m	0%	no data
0.61%	Northern Trust Global Investments	880,895	US$2.3m	6.26%	no data
0.52%	Isthmus Partners, LLC	756,674	US$2.0m	4.9%	0.2%
0.5%	Vanguard Fiduciary Trust Company	725,608	US$1.9m	0.25%	no data
0.49%	ADAR1 Capital Management, LLC	705,190	US$1.9m	0.43%	0.11%
0.49%	Nomura Holdings, Inc.	705,048	US$1.9m	355%	no data
0.43%	Teachers Insurance and Annuity Association-College Retirement Equities Fund	622,049	US$1.6m	-28.7%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/05/26 16:56
End of Day Share Price	2026/05/26 00:00
Earnings	2026/03/31
Annual Earnings	2025/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

OmniAb, Inc. is covered by 9 analysts. 7 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Robert Wasserman	Benchmark Company
Matthew Hewitt	Craig-Hallum Capital Group LLC
Joseph Pantginis	H.C. Wainwright & Co.