89bio
ETNB
ETNB was delisted on the 29th of October, 2025.
160 hedge funds and large institutions have $1.11B invested in 89bio in 2023 Q3 according to their latest regulatory filings, with 28 funds opening new positions, 62 increasing their positions, 55 reducing their positions, and 23 closing their positions.
214% more call options, than puts
Call options by funds: $40.3M | Put options by funds: $12.8M
33% more funds holding in top 10
Funds holding in top 10: 3 → 4 (+1)
22% more first-time investments, than exits
New positions opened: 28 | Existing positions closed: 23
13% more repeat investments, than reductions
Existing positions increased: 62 | Existing positions reduced: 55
2% more funds holding
Funds holding: 157 → 160 (+3)
10.67% less ownership
Funds ownership: 106.01% → 95.34% (-11%)
24% less capital invested
Capital invested by funds: $1.46B → $1.11B (-$353M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
B
Braidwell
Stamford,
Connecticut
|
+$26.7M |
| 2 |
LCM
Laurion Capital Management
New York
|
+$8.03M |
| 3 |
Westfield Capital Management
Boston,
Massachusetts
|
+$8M |
| 4 |
Barclays
London,
United Kingdom
|
+$7.19M |
| 5 |
Citadel Advisors
Miami,
Florida
|
+$7.04M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BC
Boxer Capital
San Diego,
California
|
-$39.8M |
| 2 |
CAM
Cormorant Asset Management
Boston,
Massachusetts
|
-$25.6M |
| 3 |
Morgan Stanley
New York
|
-$17.6M |
| 4 |
Marshall Wace
London,
United Kingdom
|
-$15.4M |
| 5 |
Deutsche Bank
Frankfurt Am Main Ge,
Germany
|
-$13M |
ETNB Hedge Fund Activity: Q3 2023 in Review
160 of the 6,302 institutional investors tracked by Wall St. Rank reported a position in 89bio (ETNB) for Q3 2023, worth a combined $1.11B — down 24% from $1.46B a quarter earlier.
Buyers outnumbered sellers: 28 funds opened new ETNB positions and 23 closed out — a net gain of 5 holders — while 62 added to existing stakes and 55 trimmed.
The largest buyer was Braidwell, opening a new position worth an estimated $26.7M. The largest seller was Boxer Capital, exiting entirely with an estimated $39.8M sold.
- 160 institutional investors held 89bio (ETNB) as of Q3 2023, up from 157 in Q2 2023.
- Funds reported $1.11B of 89bio stock for Q3 2023, down 24% quarter-over-quarter.
- 28 funds opened new 89bio positions in Q3 2023 and 23 closed out, a net change of +5 holders.
- The largest 89bio buyer in Q3 2023 was Braidwell, an estimated $26.7M added.
- The largest 89bio seller in Q3 2023 was Boxer Capital, an estimated $39.8M sold.
Based on aggregated 13F filings for Q3 2023.