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OmniAb
OABI

144 hedge funds and large institutions have $95.5M invested in OmniAb in 2025 Q2 according to their latest regulatory filings, with 25 funds opening new positions, 56 increasing their positions, 32 reducing their positions, and 33 closing their positions.

New
Increased
Maintained
Reduced
Closed

100% more funds holding in top 10

Funds holding in top 10: 1 → 2 (+1)

75% more repeat investments, than reductions

Existing positions increased: 56 | Existing positions reduced: 32

5% less funds holding

Funds holding: 152 → 144 (-8)

7.01% less ownership

Funds ownership: 52% → 44.98% (-7%)

24% less first-time investments, than exits

New positions opened: 25 | Existing positions closed: 33

37% less capital invested

Capital invested by funds: $152M → $95.5M (-$56.7M)

Holders
144
Holders Change
-8
Holders Change %
-5.26%
% of All Funds
1.9%
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
56
Reduced
32
Closed
33
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
WCM
Whitefort Capital Management
New York
+$10.6M
2
Citadel Advisors
Citadel Advisors
Florida
+$3.24M
3
KLP
Kent Lake PR
Puerto Rico
+$2.55M
4
Jacobs Levy Equity Management
Jacobs Levy Equity Management
New Jersey
+$1.85M
5
Renaissance Technologies
Renaissance Technologies
New York
+$1.14M

Top Sellers

Rank Fund Capital Flow
1
Janus Henderson Group
Janus Henderson Group
United Kingdom
-$19.5M
2
Macquarie Group
Macquarie Group
Australia
-$10.6M
3
RCMNY
Rubric Capital Management (New York)
New York
-$6.84M
4
CC
Chicago Capital
Illinois
-$6.29M
5
SDJVC
St. Denis J. Villere & Co
Louisiana
-$3.45M
Name Holding Trade Value Shares
Change 		Change in
Stake
FFO
126
Fortitude Family Office
Arizona
$811 +$780 +466 New
DWS
127
Dynamic Wealth Strategies
California
$715 – – –
DJSG
128
D.J. St. Germain
Massachusetts
$639 – – –
S
129
SignatureFD
Georgia
$628 – – –
CIBC Private Wealth Group
130
CIBC Private Wealth Group
Georgia
$512 -$820 -490 -63%
NA
131
NewEdge Advisors
Louisiana
$329 – – –
CTC
132
Central Trust Company
Missouri
$298 – – –
SA
133
Scarborough Advisors
Maryland
$280 +$269 +161 New
Comerica Bank
134
Comerica Bank
Texas
$221 -$576 -344 -73%
SS
135
SBI Securities
Japan
$219 +$182 +109 +641%
CIAS
136
CBIZ Investment Advisory Services
Ohio
$136 – – –
FMII
137
Farmers & Merchants Investments Inc
Nebraska
$92 – – –
National Bank of Canada
138
National Bank of Canada
Quebec, Canada
$73 +$70 +42 New
UB
139
UMB Bank
Missouri
$50 – – –
PA
140
Parallel Advisors
California
$7 – – –
SC
141
SouthState Corp
Florida
$2 -$1.15K -688 -100%
FFA
142
Farther Finance Advisors
California
$2 -$7 -4 -80%
Janus Henderson Group
143
Janus Henderson Group
United Kingdom
– -$19.5M -8,058,228 Closed
Macquarie Group
144
Macquarie Group
Australia
– -$10.6M -4,422,738 Closed
RCMNY
145
Rubric Capital Management (New York)
New York
– -$6.84M -2,850,588 Closed
CC
146
Chicago Capital
Illinois
– -$6.29M -2,620,454 Closed
SDJVC
147
St. Denis J. Villere & Co
Louisiana
– -$3.45M -1,437,944 Closed
DMKJ
148
David M. Knott Jr
– -$2.36M -982,336 Closed
Impax Asset Management Group
149
Impax Asset Management Group
United Kingdom
– -$1.83M -761,387 Closed
FSCM
150
First Sabrepoint Capital Management
Texas
– -$984K -410,000 Closed
4 5
6
7 8

OABI Hedge Fund Activity: Q2 2025 in Review

144 of the 7,596 institutional investors tracked by Wall St. Rank reported a position in OmniAb (OABI) for Q2 2025, worth a combined $95.5M — down 37% from $152M a quarter earlier.

Sellers outnumbered buyers: 33 funds closed out of OABI and 25 opened new positions — a net loss of 8 holders — while 32 trimmed existing stakes and 56 added.

The largest buyer was Whitefort Capital Management, adding an estimated $10.6M. The largest seller was Janus Henderson Group, exiting entirely with an estimated $19.5M sold.

  • 144 institutional investors held OmniAb (OABI) as of Q2 2025, down from 152 in Q1 2025.
  • Funds reported $95.5M of OmniAb stock for Q2 2025, down 37% quarter-over-quarter.
  • 25 funds opened new OmniAb positions in Q2 2025 and 33 closed out, a net change of -8 holders.
  • The largest OmniAb buyer in Q2 2025 was Whitefort Capital Management, an estimated $10.6M added.
  • The largest OmniAb seller in Q2 2025 was Janus Henderson Group, an estimated $19.5M sold.

Based on aggregated 13F filings for Q2 2025.