13D·WATCH Activist + Insider Intelligence Live feed Blog About Pilot
ISSUER PROFILE · CIK 0001786205 · CUSIP 03940C100

Arcellx, Inc.ACLX

1 13D/G filings 1 distinct filers 0 insider transactions (365d)

Post-Filing Returns · across 1 activist filings on this issuer

Median 30d
avg —
Median 60d
avg —
Median 90d
avg —
Median 180d
avg —

Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.

Cross-Reference Snapshot

Activist filings
1
1 SCHEDULE
Distinct filers
1
single filer
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
1.53
as of 2026-03-31

13D/G Filings Timeline · 1 total

FiledFormFilerStakeSharesIntent
2025-02-27 SCHEDULE Elghandour Rami 6.90% 3,997,132 view →

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-03-31 2,269,775 1.53 -51.7%
2026-03-13 4,697,239 3.35 -18.5%
2026-02-27 5,763,954 1.00 -38.0%
2026-02-13 9,291,091 13.37 +2.0%
2026-01-30 9,109,641 8.90 -0.1%
2026-01-15 9,119,451 10.89 -1.7%
2025-12-31 9,278,880 10.54 +14.4%
2025-12-15 8,112,318 5.31 +25.8%

Alert me when any activist files on Arcellx, Inc.

Free. We email you when criteria match. One-click unsubscribe in every email.

Track every activist who touches this name.

Custom alerts · full feed · daily intelligence · API. $1,500/mo. Pilots welcome.

Request a pilot →