OABI icon

OmniAb
OABI

Overview Fund Activity

151 hedge funds and large institutions have $152M invested in OmniAb in 2025 Q1 according to their latest regulatory filings, with 16 funds opening new positions, 43 increasing their positions, 54 reducing their positions, and 26 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
151
Holders Change
-12
Holders Change %
-7.36%
% of All Funds
2.05%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.01%
New
16
Increased
43
Reduced
54
Closed
26
Calls
$2K
Puts
$7K
Net Calls
-$5K
Net Calls Change
-$109K

Top Buyers

1
WCM
Whitefort Capital Management
New York
+$9.4M
2
PMG
Private Management Group
California
+$712K
3
Vanguard Group
Vanguard Group
Pennsylvania
+$298K
4
Macquarie Group
Macquarie Group
Australia
+$293K
5
RA
Royce & Associates
New York
+$264K

Top Sellers

1
KCM
Kornitzer Capital Management
Kansas
-$3.18M
2
FSCM
First Sabrepoint Capital Management
Texas
-$2.52M
3
JPMorgan Chase & Co
JPMorgan Chase & Co
New York
-$920K
4
CC
Chicago Capital
Illinois
-$852K
5
OCM
Orchard Capital Management
Illinois
-$774K
Name Holding Trade Value Shares
Change 		Shares
Change %
Janus Henderson Group
1
Janus Henderson Group
United Kingdom
$19.5M +$237K +97,907 +1%
BlackRock
2
BlackRock
New York
$16.9M -$289K -120,278 -2%
Vanguard Group
3
Vanguard Group
Pennsylvania
$12.4M +$298K +123,996 +2%
Macquarie Group
4
Macquarie Group
Australia
$10.6M +$293K +122,071 +3%
WCM
5
Whitefort Capital Management
New York
$9.4M +$9.4M +3,914,896 New
Dimensional Fund Advisors
6
Dimensional Fund Advisors
Texas
$7.52M +$255K +106,044 +4%
RCMNY
7
Rubric Capital Management (New York)
New York
$6.84M – – –
CC
8
Chicago Capital
Illinois
$6.29M -$852K -354,997 -12%
RHJA
9
Rice Hall James & Associates
California
$6.19M -$164K -68,227 -3%
PMG
10
Private Management Group
California
$6.07M +$712K +296,711 +13%
Geode Capital Management
11
Geode Capital Management
Massachusetts
$5.91M +$258K +107,608 +5%
State Street
12
State Street
Massachusetts
$4.61M -$368K -153,527 -7%
SDJVC
13
St. Denis J. Villere & Co
Louisiana
$3.45M -$67.5K -28,126 -2%
M
14
Murchinson
Ontario, Canada
$2.42M +$18.7K +7,810 +0.8%
DMKJ
15
David M. Knott Jr
$2.36M -$269K -112,169 -10%
Northern Trust
16
Northern Trust
Illinois
$1.99M -$133K -55,329 -6%
RA
17
Royce & Associates
New York
$1.96M +$264K +110,000 +16%
Charles Schwab
18
Charles Schwab
California
$1.95M -$21K -8,730 -1%
Impax Asset Management Group
19
Impax Asset Management Group
United Kingdom
$1.83M – – –
WC
20
Woodstock Corp
Massachusetts
$1.78M -$144K -59,878 -7%
JPMorgan Chase & Co
21
JPMorgan Chase & Co
New York
$1.48M -$920K -383,360 -38%
TL
22
TowerView LLC
New York
$1.39M +$72K +30,000 +5%
Bank of America
23
Bank of America
North Carolina
$1.3M -$176K -73,419 -12%
Morgan Stanley
24
Morgan Stanley
New York
$1.2M +$136K +56,609 +13%
IP
25
Isthmus Partners
Wisconsin
$1.12M +$37.4K +15,572 +3%
1
2 3 4 5