OmniAb
OABI
131 hedge funds and large institutions have $144M invested in OmniAb in 2026 Q2 according to their latest regulatory filings, with 20 funds opening new positions, 57 increasing their positions, 33 reducing their positions, and 16 closing their positions.
100% more funds holding in top 10
Funds holding in top 10: 1 → 2 (+1)
73% more repeat investments, than reductions
Existing positions increased: 57 | Existing positions reduced: 33
64% more capital invested
Capital invested by funds: $87.7M → $144M (+$56.5M)
25% more first-time investments, than exits
New positions opened: 20 | Existing positions closed: 16
2% more funds holding
Funds holding: 128 → 131 (+3)
1.91% more ownership
Funds ownership: 38.64% → 40.55% (+1.9%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Nomura Holdings
Tokyo,
Japan
|
+$8.58M |
| 2 |
BlackRock
New York
|
+$1.57M |
| 3 |
Mackenzie Financial
Toronto Ontario,
Ontario, Canada
|
+$971K |
| 4 |
Renaissance Technologies
New York
|
+$657K |
| 5 |
ACM
ADAR1 Capital Management
Austin,
Texas
|
+$481K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
WCM
Whitefort Capital Management
New York
|
-$7.89M |
| 2 |
Dimensional Fund Advisors
Austin,
Texas
|
-$959K |
| 3 |
Citadel Advisors
Miami,
Florida
|
-$338K |
| 4 |
Vanguard Capital Management
Malvern,
Pennsylvania
|
-$281K |
| 5 |
SCM
Stonepine Capital Management
Bend,
Oregon
|
-$258K |
OABI Hedge Fund Activity: Q2 2026 in Review
131 of the 8,305 institutional investors tracked by Wall St. Rank reported a position in OmniAb (OABI) for Q2 2026, worth a combined $144M — up 64% from $87.7M a quarter earlier.
Buyers outnumbered sellers: 20 funds opened new OABI positions and 16 closed out — a net gain of 4 holders — while 57 added to existing stakes and 33 trimmed.
The largest buyer was Nomura Holdings, adding an estimated $8.58M. The largest seller was Whitefort Capital Management, cutting an estimated $7.89M.
- 131 institutional investors held OmniAb (OABI) as of Q2 2026, up from 128 in Q1 2026.
- Funds reported $144M of OmniAb stock for Q2 2026, up 64% quarter-over-quarter.
- 20 funds opened new OmniAb positions in Q2 2026 and 16 closed out, a net change of +4 holders.
- The largest OmniAb buyer in Q2 2026 was Nomura Holdings, an estimated $8.58M added.
- The largest OmniAb seller in Q2 2026 was Whitefort Capital Management, an estimated $7.89M sold.
Based on aggregated 13F filings for Q2 2026.