Cabaletta Bio
CABA
95 hedge funds and large institutions have $167M invested in Cabaletta Bio in 2025 Q4 according to their latest regulatory filings, with 30 funds opening new positions, 33 increasing their positions, 18 reducing their positions, and 8 closing their positions.
1,725% more call options, than puts
Call options by funds: $5.09M | Put options by funds: $279K
275% more first-time investments, than exits
New positions opened: 30 | Existing positions closed: 8
83% more repeat investments, than reductions
Existing positions increased: 33 | Existing positions reduced: 18
27% more funds holding
Funds holding: 75 → 95 (+20)
3.53% more ownership
Funds ownership: 75.67% → 79.2% (+3.5%)
3% more capital invested
Capital invested by funds: $162M → $167M (+$4.96M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
+$5.08M |
| 2 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
+$3.71M |
| 3 |
Two Sigma Investments
New York
|
+$3.39M |
| 4 |
IC
Ikarian Capital
Dallas,
Texas
|
+$2.23M |
| 5 |
Schroder Investment Management Group
London,
United Kingdom
|
+$1.88M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
HCM
Heights Capital Management
San Francisco,
California
|
-$4.88M |
| 2 |
Alyeska Investment Group
Chicago,
Illinois
|
-$3.04M |
| 3 |
WP
Woodline Partners
San Francisco,
California
|
-$2.19M |
| 4 |
Citadel Advisors
Miami,
Florida
|
-$1.67M |
| 5 |
CAM
Cormorant Asset Management
Boston,
Massachusetts
|
-$1.49M |
CABA Hedge Fund Activity: Q4 2025 in Review
95 of the 8,245 institutional investors tracked by Wall St. Rank reported a position in Cabaletta Bio (CABA) for Q4 2025, worth a combined $167M — up 3.1% from $162M a quarter earlier.
Buyers outnumbered sellers: 30 funds opened new CABA positions and 8 closed out — a net gain of 22 holders — while 33 added to existing stakes and 18 trimmed.
The largest buyer was Millennium Management, adding an estimated $5.08M. The largest seller was Heights Capital Management, exiting entirely with an estimated $4.88M sold.
- 95 institutional investors held Cabaletta Bio (CABA) as of Q4 2025, up from 75 in Q3 2025.
- Funds reported $167M of Cabaletta Bio stock for Q4 2025, up 3.1% quarter-over-quarter.
- 30 funds opened new Cabaletta Bio positions in Q4 2025 and 8 closed out, a net change of +22 holders.
- The largest Cabaletta Bio buyer in Q4 2025 was Millennium Management, an estimated $5.08M added.
- The largest Cabaletta Bio seller in Q4 2025 was Heights Capital Management, an estimated $4.88M sold.
Based on aggregated 13F filings for Q4 2025.