Arcellx
ACLX
ACLX was delisted on the 27th of April, 2026.
218 hedge funds and large institutions have $4.34B invested in Arcellx in 2025 Q4 according to their latest regulatory filings, with 42 funds opening new positions, 72 increasing their positions, 70 reducing their positions, and 31 closing their positions.
35% more first-time investments, than exits
New positions opened: 42 | Existing positions closed: 31
33% more call options, than puts
Call options by funds: $21.8M | Put options by funds: $16.4M
6.14% more ownership
Funds ownership: 109.07% → 115.21% (+6.1%)
4% more funds holding
Funds holding: 209 → 218 (+9)
3% more repeat investments, than reductions
Existing positions increased: 72 | Existing positions reduced: 70
16% less capital invested
Capital invested by funds: $5.18B → $4.34B (-$834M)
36% less funds holding in top 10
Funds holding in top 10: 11 → 7 (-4)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
+$336M |
| 2 |
VPC
Vestal Point Capital
New York
|
+$134M |
| 3 |
PBA
Paradigm Biocapital Advisors
New York
|
+$85.8M |
| 4 |
JP Morgan Chase
New York
|
+$45.6M |
| 5 |
WP
Woodline Partners
San Francisco,
California
|
+$39.6M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$175M |
| 2 |
RCM
RA Capital Management
Boston,
Massachusetts
|
-$141M |
| 3 |
PA
Perceptive Advisors
New York
|
-$80M |
| 4 |
AIIC
AJU IB Investment Company
Seoul,
South Korea
|
-$65.7M |
| 5 |
Capital World Investors
Los Angeles,
California
|
-$64.3M |
ACLX Hedge Fund Activity: Q4 2025 in Review
218 of the 8,275 institutional investors tracked by Wall St. Rank reported a position in Arcellx (ACLX) for Q4 2025, worth a combined $4.34B — down 16% from $5.18B a quarter earlier.
Buyers outnumbered sellers: 42 funds opened new ACLX positions and 31 closed out — a net gain of 11 holders — while 72 added to existing stakes and 70 trimmed.
The largest buyer was T. Rowe Price Investment Management, adding an estimated $336M. The largest seller was Fidelity Investments, cutting an estimated $175M.
- 218 institutional investors held Arcellx (ACLX) as of Q4 2025, up from 209 in Q3 2025.
- Funds reported $4.34B of Arcellx stock for Q4 2025, down 16% quarter-over-quarter.
- 42 funds opened new Arcellx positions in Q4 2025 and 31 closed out, a net change of +11 holders.
- The largest Arcellx buyer in Q4 2025 was T. Rowe Price Investment Management, an estimated $336M added.
- The largest Arcellx seller in Q4 2025 was Fidelity Investments, an estimated $175M sold.
Based on aggregated 13F filings for Q4 2025.