Key facts
- T. Rowe Price Investment Management, Inc. filed SCHEDULE 13G/A for ARCELLX INC COMMON STOCK (ACLX).
- Disclosed ownership: 18%.
- Date of event: 31 Dec 2025.
T. Rowe Price Investment Management, Inc. - 31 Dec 2025 SCHEDULE 13G/A Report for ARCELLX INC COMMON STOCK (ACLX)
- Filing Manager
- T. Rowe Price Investment Management, Inc.
- Reporting Manager
- T. Rowe Price Investment Management, Inc.
- Security
- ARCELLX INC COMMON STOCK
- Symbol
- ACLX
- Shares outstanding
- 57,707,240 shares
- Disclosed Ownership
- 10,560,425 shares
- Ownership
- 18%
- Form type
- SCHEDULE 13G/A
- Filing time
- 17 Feb 2026, 10:28:30 UTC
- Date of event
- 31 Dec 2025
- Previous filing
- 05 Dec 2025
- Next filing
- 06 Mar 2026
- SEC
- View on sec.gov
Key filing fact
T. Rowe Price Investment Management, Inc. disclosed 18% ownership in ARCELLX INC COMMON STOCK (ACLX) on 31 Dec 2025.
Change
- Previous schedule filing date: 05 Dec 2025.
- Current filing was accepted on 17 Feb 2026, 10:28.
Research use
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting persons
Reporting managers (1)
Names, ownership, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. | 18% | 10,560,425 | 10,266,287 | 0 | Ellen York | Vice President |
CIK / CUSIP context first