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.
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)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
WCM
Whitefort Capital Management
New York
|
+$10.6M |
| 2 |
Citadel Advisors
Miami,
Florida
|
+$3.24M |
| 3 |
KLP
Kent Lake PR
Anasco,
Puerto Rico
|
+$2.55M |
| 4 |
Jacobs Levy Equity Management
Florham Park,
New Jersey
|
+$1.85M |
| 5 |
Renaissance Technologies
New York
|
+$1.14M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Janus Henderson Group
London,
United Kingdom
|
-$19.5M |
| 2 |
Macquarie Group
Sydney, NSW 2000,
Australia
|
-$10.6M |
| 3 |
RCMNY
Rubric Capital Management (New York)
New York
|
-$6.84M |
| 4 |
CC
Chicago Capital
Chicago,
Illinois
|
-$6.29M |
| 5 |
SDJVC
St. Denis J. Villere & Co
New Orleans,
Louisiana
|
-$3.45M |
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.