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OmniAb
OABI

Overview Fund Activity

142 hedge funds and large institutions have $95.3M invested in OmniAb in 2025 Q2 according to their latest regulatory filings, with 25 funds opening new positions, 55 increasing their positions, 30 reducing their positions, and 32 closing their positions.

Holders
142
Holders Change
-9
Holders Change %
-5.96%
% of All Funds
1.91%
Holding in Top 10
2
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+100%
% of All Funds
0.03%
New
25
Increased
55
Reduced
30
Closed
32
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
WCM
1
Whitefort Capital Management
New York
$17.8M
2
Citadel Advisors
2
Citadel Advisors
Florida
$3.71M
3
KLP
3
Kent Lake PR
Puerto Rico
$3.05M
4
Jacobs Levy Equity Management
4
Jacobs Levy Equity Management
New Jersey
$1.92M
5
Renaissance Technologies
5
Renaissance Technologies
New York
$1.23M

Top Sellers

1
Janus Henderson Group
1
Janus Henderson Group
United Kingdom
$0
2
Macquarie Group
2
Macquarie Group
Australia
$0
3
RCMNY
3
Rubric Capital Management (New York)
New York
$0
4
CC
4
Chicago Capital
Illinois
$0
5
SDJVC
5
St. Denis J. Villere & Co
Louisiana
$0
Name Market Value Shares Shares
Change 		Shares
Change %
WCM
1
Whitefort Capital Management
New York
$17.8M 10,240,146 +6,325,250 +162%
BlackRock
2
BlackRock
New York
$12.2M 7,001,179 -57,563 -0.8%
Vanguard Group
3
Vanguard Group
Pennsylvania
$9.17M 5,268,315 +89,009 +2%
Dimensional Fund Advisors
4
Dimensional Fund Advisors
Texas
$5.07M 2,913,764 -217,954 -7%
RHJA
5
Rice Hall James & Associates
California
$4.57M 2,627,123 +46,343 +2%
PMG
6
Private Management Group
California
$4.45M 2,558,045 +28,286 +1%
Geode Capital Management
7
Geode Capital Management
Massachusetts
$4.25M 2,439,424 -21,626 -0.9%
Citadel Advisors
8
Citadel Advisors
Florida
$3.71M 2,132,592 +1,938,568 +999%
State Street
9
State Street
Massachusetts
$3.5M 2,010,909 +89,626 +5%
KLP
10
Kent Lake PR
Puerto Rico
$3.05M 1,750,000 +1,525,000 +678%
Jacobs Levy Equity Management
11
Jacobs Levy Equity Management
New Jersey
$1.92M 1,105,524 +1,105,524 New
RA
12
Royce & Associates
New York
$1.51M 867,080 +50,000 +6%
Northern Trust
13
Northern Trust
Illinois
$1.46M 836,869 +9,743 +1%
Charles Schwab
14
Charles Schwab
California
$1.45M 832,274 +21,296 +3%
TL
15
TowerView LLC
New York
$1.45M 831,100 +251,100 +43%
JPMorgan Chase & Co
16
JPMorgan Chase & Co
New York
$1.38M 793,734 +175,297 +28%
Morgan Stanley
17
Morgan Stanley
New York
$1.34M 767,621 +268,957 +54%
Renaissance Technologies
18
Renaissance Technologies
New York
$1.23M 707,550 +680,950 +2,560%
WC
19
Woodstock Corp
Massachusetts
$1.08M 621,684 -121,016 -16%
IP
20
Isthmus Partners
Wisconsin
$988K 568,043 +99,336 +21%
Millennium Management
21
Millennium Management
New York
$917K 650,316 +518,645 +394%
M
22
Murchinson
Ontario, Canada
$875K 502,810 -505,000 -50%
NL
23
Nuveen LLC
North Carolina
$848K 487,261 +259,460 +114%
Marshall Wace
24
Marshall Wace
United Kingdom
$626K 359,665 +359,665 New
Royal Bank of Canada
25
Royal Bank of Canada
Ontario, Canada
$596K 341,995 +334,739 +4,613%
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