OmniAb, Inc.

OABINASDAQ

$4.66+0.10 (+2.19% today)

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

OmniAb, Inc. price and activity chart data

Showing the 1Y range: Oct 8, 2025 to Oct 8, 2026. Price (+166.3%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
Whitefort Capital Management, LP	7.05%	$25.2M	6.21%	Reduce 27.95%
BlackRock, Inc.	6.12%	$21.9M	0.00%	Not reported
Nomura Holdings Inc	3.46%	$12.4M	0.01%	Add 613.17%
Cadian Capital Management, LP	2.90%	$10.4M	0.78%	Add 1.32%
Vanguard Capital Management LLC	2.65%	$9.48M	0.00%	Not reported
Geode Capital Management, LLC	1.98%	$7.1M	0.00%	Not reported
Rice Hall James & Associates, LLC	1.80%	$6.42M	0.31%	Add 2.48%
Private Management Group Inc	1.61%	$5.77M	0.15%	Reduce 3.47%
State Street Corp	1.47%	$5.25M	0.00%	Not reported
Dimensional Fund Advisors LP	0.87%	$3.11M	0.00%	Not reported
Towerview LLC	0.81%	$2.9M	1.90%	Add 18.00%
Vanguard Portfolio Management LLC	0.67%	$2.41M	0.00%	Not reported
Charles Schwab Investment Management Inc	0.67%	$2.38M	0.00%	Not reported
Northern Trust Corp	0.65%	$2.33M	0.00%	Not reported
ADAR1 Capital Management, LLC	0.65%	$2.33M	0.11%	Add 34.35%
Isthmus Partners, LLC	0.55%	$1.98M	0.19%	Add 6.18%
Vanguard Fiduciary Trust Co	0.52%	$1.87M	0.00%	Not reported
Two Sigma Investments, LP	0.45%	$1.62M	0.00%	Not reported
Nuveen, LLC	0.44%	$1.58M	0.00%	Not reported
Renaissance Technologies LLC	0.41%	$1.48M	0.00%	Not reported
D. E. Shaw & Co., Inc.	0.38%	$1.38M	0.00%	Not reported
Mackenzie Financial Corp	0.34%	$1.2M	0.00%	Not reported
Millennium Management LLC	0.33%	$864K	0.00%	Not reported
Arbiter Partners Capital Management LLC	0.26%	$948K	0.25%	Add 100.00%
Goldman Sachs Group Inc	0.26%	$946K	0.00%	Not reported
Morgan Stanley	0.26%	$914K	0.00%	Not reported
Bank of New York Mellon Corp	0.22%	$783K	0.00%	Not reported
TLS Advisors LLC	0.15%	$543K	1.60%	Reduce 11.79%
FMR LLC	0.14%	$492K	0.00%	Not reported
Bridgeway Capital Management, LLC	0.14%	$489K	0.01%	Not reported
Rhumbline Advisers	0.12%	$423K	0.00%	Not reported
Palumbo Wealth Management LLC	0.11%	$398K	0.08%	New Not reported
Invesco Ltd.	0.11%	$397K	0.00%	Not reported
Arrowstreet Capital, Limited Partnership	0.11%	$393K	0.00%	Not reported
AQR Capital Management LLC	0.11%	$388K	0.00%	Not reported
Alliancebernstein L.P.	0.11%	$245K	0.00%	Not reported
Bank of America Corp	0.10%	$368K	0.00%	Not reported
Walleye Capital LLC	0.10%	$355K	0.00%	Not reported
Cornerstone Capital, Inc.	0.10%	$350K	0.03%	Not reported
Acadian Asset Management LLC	0.09%	$323K	0.00%	Not reported
JPMorgan Chase & Co	0.07%	$275K	0.00%	Not reported
Deutsche Bank Ag\	0.07%	$248K	0.00%	Not reported
Wells Fargo & Company	0.07%	$247K	0.00%	Not reported
American Century Companies Inc	0.05%	$185K	0.00%	Not reported
XTX Topco Ltd	0.05%	$182K	0.00%	Not reported
MetLife Investment Management, LLC	0.05%	$162K	0.00%	Not reported
Russell Investments Group, Ltd.	0.04%	$157K	0.00%	Not reported
Citadel Advisors LLC	0.04%	$143K	0.00%	Not reported
Thrivent Financial for Lutherans	0.04%	$136K	0.00%	New Not reported
Citigroup Inc	0.04%	$134K	0.00%	Not reported

50 of 126 holders

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