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Schedule 13G/A

ACLXGBX Schedule 13G/A filing by Fidelity / FMR

Fidelity / FMR reported beneficial ownership of 309 shares, representing 12% of ARCELLX INC in this filing.

FiledMar 6, 2026
Ownership dateFeb 27, 2026
Reported shares309
Reported ownership12%
Ownership details

Voting and dispositive power reported in the filing

These figures describe the reporting filer’s disclosed voting and investment authority. They should be read together with the reported share count and percentage.

Sole voting power 305.9K
Shared voting power 309
Sole dispositive power 309
Shared dispositive power 309
Source

Original filing and accession

Use the SEC filing as the primary source when you need the complete disclosure, footnotes, exhibits, or reporting-person details.

Reporting filer
Fidelity / FMR
CIK
CIK0000315066
Accession
0000315066-26-000660
Form
Schedule 13G/A
Open SEC filing View ACLXGBX ownership history
Read the filing in context

Understand what a Schedule 13 filing does—and does not—tell you.

How to read a Schedule 13G → Does a 13G mean the shares were just bought? → Filing date vs. ownership date →