OmniAb
OABI
128 hedge funds and large institutions have $87.7M invested in OmniAb in 2026 Q1 according to their latest regulatory filings, with 24 funds opening new positions, 42 increasing their positions, 38 reducing their positions, and 22 closing their positions.
11% more repeat investments, than reductions
Existing positions increased: 42 | Existing positions reduced: 38
9% more first-time investments, than exits
New positions opened: 24 | Existing positions closed: 22
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
1% less funds holding
Funds holding: 129 → 128 (-1)
1.16% less ownership
Funds ownership: 39.8% → 38.64% (-1.2%)
17% less capital invested
Capital invested by funds: $106M → $87.7M (-$18.1M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Nomura Holdings
Tokyo,
Japan
|
+$993K |
| 2 |
Geode Capital Management
Boston,
Massachusetts
|
+$366K |
| 3 |
TA
TLS Advisors
Miami,
Florida
|
+$325K |
| 4 |
RHJA
Rice Hall James & Associates
San Diego,
California
|
+$264K |
| 5 |
AQR Capital Management
Greenwich,
Connecticut
|
+$165K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SCM
Stonepine Capital Management
Bend,
Oregon
|
-$969K |
| 2 |
Dimensional Fund Advisors
Austin,
Texas
|
-$735K |
| 3 |
WP
Woodline Partners
San Francisco,
California
|
-$529K |
| 4 |
CCM
Cadian Capital Management
New York
|
-$501K |
| 5 |
Nuveen
Charlotte,
North Carolina
|
-$452K |
OABI Hedge Fund Activity: Q1 2026 in Review
128 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in OmniAb (OABI) for Q1 2026, worth a combined $87.7M — down 17% from $106M a quarter earlier.
Buyers outnumbered sellers: 24 funds opened new OABI positions and 22 closed out — a net gain of 2 holders — while 42 added to existing stakes and 38 trimmed.
The largest buyer was Nomura Holdings, adding an estimated $993K. The largest seller was Stonepine Capital Management, cutting an estimated $969K.
- 128 institutional investors held OmniAb (OABI) as of Q1 2026, down from 129 in Q4 2025.
- Funds reported $87.7M of OmniAb stock for Q1 2026, down 17% quarter-over-quarter.
- 24 funds opened new OmniAb positions in Q1 2026 and 22 closed out, a net change of +2 holders.
- The largest OmniAb buyer in Q1 2026 was Nomura Holdings, an estimated $993K added.
- The largest OmniAb seller in Q1 2026 was Stonepine Capital Management, an estimated $969K sold.
Based on aggregated 13F filings for Q1 2026.