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OmniAb
OABI

129 hedge funds and large institutions have $106M invested in OmniAb in 2025 Q4 according to their latest regulatory filings, with 14 funds opening new positions, 41 increasing their positions, 39 reducing their positions, and 21 closing their positions.

New
Increased
Maintained
Reduced
Closed

5% more capital invested

Capital invested by funds: $101M → $106M (+$5.24M)

5% more repeat investments, than reductions

Existing positions increased: 41 | Existing positions reduced: 39

0% more funds holding in top 10

Funds holding in top 10: 1 → 1 (0)

3.94% less ownership

Funds ownership: 43.74% → 39.8% (-3.9%)

8% less funds holding

Funds holding: 140 → 129 (-11)

33% less first-time investments, than exits

New positions opened: 14 | Existing positions closed: 21

Holders
129
Holders Change
-11
Holders Change %
-7.86%
% of All Funds
1.57%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.01%
New
14
Increased
41
Reduced
39
Closed
21
Calls
$48K
Puts
–
Net Calls
+$48K
Net Calls Change
+$6K

Top Buyers

Rank Fund Capital Flow
1
BlackRock
BlackRock
New York
+$1.91M
2
CCM
Cadian Capital Management
New York
+$1.32M
3
Vanguard Group
Vanguard Group
Pennsylvania
+$829K
4
Geode Capital Management
Geode Capital Management
Massachusetts
+$689K
5
Millennium Management
Millennium Management
New York
+$674K

Top Sellers

Rank Fund Capital Flow
1
WP
Woodline Partners
California
-$4.47M
2
SCM
Stonepine Capital Management
Oregon
-$2.51M
3
Jacobs Levy Equity Management
Jacobs Levy Equity Management
New Jersey
-$1.33M
4
Citadel Advisors
Citadel Advisors
Florida
-$959K
5
JP Morgan Chase
JP Morgan Chase
New York
-$816K
Name Holding Trade Value Shares
Change 		Change in
Stake
EWA
101
EverSource Wealth Advisors
Alabama
$3.71K +$2.33K +1,338 +201%
PA
102
Parallel Advisors
California
$3.43K +$3.21K +1,850 +46,250%
LFG
103
Larson Financial Group
Missouri
$2.72K – – –
Optiver Holding
104
Optiver Holding
Netherlands
$2.32K – – –
SWM
105
Spire Wealth Management
Virginia
$2.22K -$9.23K -5,310 -82%
CVM
106
Cheviot Value Management
California
$1.81K – – –
NSIM
107
North Star Investment Management
Illinois
$1.02K – – –
Daiwa Securities Group
108
Daiwa Securities Group
Japan
$1K – – –
Nisa Investment Advisors
109
Nisa Investment Advisors
Missouri
$907 -$8.04K -4,623 -90%
Simplex Trading
110
Simplex Trading
Illinois
$795 -$5.05K -2,904 -87%
DWS
111
Dynamic Wealth Strategies
California
$760 – – –
DJSG
112
D.J. St. Germain
Massachusetts
$679 – – –
S
113
SignatureFD
Georgia
$668 – – –
CFP
114
Comprehensive Financial Planning
Pennsylvania
$597 +$561 +323 New
CIBC Private Wealth Group
115
CIBC Private Wealth Group
Georgia
$544 – – –
NA
116
NewEdge Advisors
Louisiana
$350 – – –
CTC
117
Central Trust Company
Missouri
$317 – – –
SA
118
Scarborough Advisors
Maryland
$298 – – –
Comerica Bank
119
Comerica Bank
Texas
$235 – – –
FMII
120
Farmers & Merchants Investments Inc
Nebraska
$98 – – –
Northwestern Mutual Wealth Management
121
Northwestern Mutual Wealth Management
Wisconsin
$54 +$50 +29 New
AAP
122
Arax Advisory Partners
Colorado
$44 -$454 -261 -92%
SS
123
SBI Securities
Japan
$44 -$2 -1 -4%
ACA
124
American Capital Advisory
Idaho
$36 +$33 +19 New
TWD
125
True Wealth Design
Ohio
$12 +$10 +6 New
2 3 4
5
6

OABI Hedge Fund Activity: Q4 2025 in Review

129 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in OmniAb (OABI) for Q4 2025, worth a combined $106M — up 5.2% from $101M a quarter earlier.

Sellers outnumbered buyers: 21 funds closed out of OABI and 14 opened new positions — a net loss of 7 holders — while 39 trimmed existing stakes and 41 added.

The largest buyer was BlackRock, adding an estimated $1.91M. The largest seller was Woodline Partners, cutting an estimated $4.47M.

  • 129 institutional investors held OmniAb (OABI) as of Q4 2025, down from 140 in Q3 2025.
  • Funds reported $106M of OmniAb stock for Q4 2025, up 5.2% quarter-over-quarter.
  • 14 funds opened new OmniAb positions in Q4 2025 and 21 closed out, a net change of -7 holders.
  • The largest OmniAb buyer in Q4 2025 was BlackRock, an estimated $1.91M added.
  • The largest OmniAb seller in Q4 2025 was Woodline Partners, an estimated $4.47M sold.

Based on aggregated 13F filings for Q4 2025.