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OmniAb
OABI

140 hedge funds and large institutions have $101M invested in OmniAb in 2025 Q3 according to their latest regulatory filings, with 16 funds opening new positions, 33 increasing their positions, 52 reducing their positions, and 18 closing their positions.

New
Increased
Maintained
Reduced
Closed

5% more capital invested

Capital invested by funds: $95.5M → $101M (+$5M)

1.24% less ownership

Funds ownership: 44.98% → 43.74% (-1.2%)

3% less funds holding

Funds holding: 144 → 140 (-4)

11% less first-time investments, than exits

New positions opened: 16 | Existing positions closed: 18

37% less repeat investments, than reductions

Existing positions increased: 33 | Existing positions reduced: 52

50% less funds holding in top 10

Funds holding in top 10: 2 → 1 (-1)

Holders
140
Holders Change
-4
Holders Change %
-2.78%
% of All Funds
1.84%
Holding in Top 10
1
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-50%
% of All Funds
0.01%
New
16
Increased
33
Reduced
52
Closed
18
Calls
$42K
Puts
–
Net Calls
+$42K
Net Calls Change
+$42K

Top Buyers

Rank Fund Capital Flow
1
WCM
Whitefort Capital Management
New York
+$7.28M
2
CCM
Cadian Capital Management
New York
+$6.72M
3
WP
Woodline Partners
California
+$5.22M
4
SCM
Stonepine Capital Management
Oregon
+$3.92M
5
ACM
ADAR1 Capital Management
Texas
+$1.4M

Top Sellers

Rank Fund Capital Flow
1
Citadel Advisors
Citadel Advisors
Florida
-$2.37M
2
KLP
Kent Lake PR
Puerto Rico
-$2.28M
3
RA
Royce & Associates
New York
-$1.51M
4
M
Murchinson
Ontario, Canada
-$875K
5
Dimensional Fund Advisors
Dimensional Fund Advisors
Texas
-$668K
Name Holding Trade Value Shares
Change 		Change in
Stake
Nisa Investment Advisors
101
Nisa Investment Advisors
Missouri
$8.18K – – –
Mirae Asset Global Investments
102
Mirae Asset Global Investments
South Korea
$7.59K +$33 +18 +0.4%
PAS
103
Point72 Asia (Singapore)
Singapore
$6.7K -$68.4K -37,453 -90%
SAM
104
Smartleaf Asset Management
Massachusetts
$5.46K +$629 +344 +11%
AB
105
Amalgamated Bank
New York
$5K – – –
Simplex Trading
106
Simplex Trading
Illinois
$5K +$5.73K +3,134 +1,567%
GFM
107
GF Fund Management
China
$4.14K -$936 -512 -17%
JGIA
108
Jackson Grant Investment Advisers
Connecticut
$3.92K – – –
RPA
109
Redwood Park Advisors
California
$3.5K – – –
AF
110
Allworth Financial
California
$3.4K – – –
FFO
111
Fortitude Family Office
Arizona
$3.38K +$3.01K +1,646 +353%
LFG
112
Larson Financial Group
Missouri
$2.35K – – –
Optiver Holding
113
Optiver Holding
Netherlands
$2.01K +$2.29K +1,256 New
Rockefeller Capital Management
114
Rockefeller Capital Management
New York
$1.57K +$1.79K +980 New
CVM
115
Cheviot Value Management
California
$1.52K – – –
EWA
116
EverSource Wealth Advisors
Alabama
$1.06K -$841 -460 -41%
Daiwa Securities Group
117
Daiwa Securities Group
Japan
$1K – – –
NSIM
118
North Star Investment Management
Illinois
$880 – – –
DWS
119
Dynamic Wealth Strategies
California
$658 – – –
DJSG
120
D.J. St. Germain
Massachusetts
$587 – – –
S
121
SignatureFD
Georgia
$578 – – –
PFBT
122
Parkside Financial Bank & Trust
Missouri
$551 +$629 +344 New
PNC Financial Services Group
123
PNC Financial Services Group
Pennsylvania
$509 -$2.26K -1,239 -80%
CIBC Private Wealth Group
124
CIBC Private Wealth Group
Georgia
$470 – – –
AAP
125
Arax Advisory Partners
Colorado
$456 +$521 +285 New
3 4
5
6 7

OABI Hedge Fund Activity: Q3 2025 in Review

140 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in OmniAb (OABI) for Q3 2025, worth a combined $101M — up 5.2% from $95.5M a quarter earlier.

Sellers outnumbered buyers: 18 funds closed out of OABI and 16 opened new positions — a net loss of 2 holders — while 52 trimmed existing stakes and 33 added.

The largest buyer was Whitefort Capital Management, adding an estimated $7.28M. The largest seller was Citadel Advisors, cutting an estimated $2.37M.

  • 140 institutional investors held OmniAb (OABI) as of Q3 2025, down from 144 in Q2 2025.
  • Funds reported $101M of OmniAb stock for Q3 2025, up 5.2% quarter-over-quarter.
  • 16 funds opened new OmniAb positions in Q3 2025 and 18 closed out, a net change of -2 holders.
  • The largest OmniAb buyer in Q3 2025 was Whitefort Capital Management, an estimated $7.28M added.
  • The largest OmniAb seller in Q3 2025 was Citadel Advisors, an estimated $2.37M sold.

Based on aggregated 13F filings for Q3 2025.