Arcellx
ACLX
ACLX was delisted on the 27th of April, 2026.
239 hedge funds and large institutions have $6.46B invested in Arcellx in 2026 Q1 according to their latest regulatory filings, with 96 funds opening new positions, 62 increasing their positions, 56 reducing their positions, and 71 closing their positions.
200% more funds holding in top 10
Funds holding in top 10: 7 → 21 (+14)
184% more call options, than puts
Call options by funds: $128M | Put options by funds: $45.1M
49% more capital invested
Capital invested by funds: $4.34B → $6.46B (+$2.12B)
35% more first-time investments, than exits
New positions opened: 96 | Existing positions closed: 71
11% more repeat investments, than reductions
Existing positions increased: 62 | Existing positions reduced: 56
10% more funds holding
Funds holding: 218 → 239 (+21)
18.49% less ownership
Funds ownership: 115.21% → 96.72% (-18%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PCM
Pentwater Capital Management
Naples,
Florida
|
+$253M |
| 2 |
Fidelity International
Hamilton,
Bermuda
|
+$206M |
| 3 |
HI
HBK Investments
Dallas,
Texas
|
+$201M |
| 4 |
GCL
Glazer Capital LLC
New York
|
+$133M |
| 5 |
Goldman Sachs
New York
|
+$56.8M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$733M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
-$304M |
| 3 |
VPC
Vestal Point Capital
New York
|
-$191M |
| 4 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$138M |
| 5 |
Citadel Advisors
Miami,
Florida
|
-$130M |
ACLX Hedge Fund Activity: Q1 2026 in Review
239 of the 8,134 institutional investors tracked by Wall St. Rank reported a position in Arcellx (ACLX) for Q1 2026, worth a combined $6.46B — up 49% from $4.34B a quarter earlier.
Buyers outnumbered sellers: 96 funds opened new ACLX positions and 71 closed out — a net gain of 25 holders — while 62 added to existing stakes and 56 trimmed.
The largest buyer was Pentwater Capital Management, opening a new position worth an estimated $253M. The largest seller was T. Rowe Price Investment Management, cutting an estimated $733M.
- 239 institutional investors held Arcellx (ACLX) as of Q1 2026, up from 218 in Q4 2025.
- Funds reported $6.46B of Arcellx stock for Q1 2026, up 49% quarter-over-quarter.
- 96 funds opened new Arcellx positions in Q1 2026 and 71 closed out, a net change of +25 holders.
- The largest Arcellx buyer in Q1 2026 was Pentwater Capital Management, an estimated $253M added.
- The largest Arcellx seller in Q1 2026 was T. Rowe Price Investment Management, an estimated $733M sold.
Based on aggregated 13F filings for Q1 2026.