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ISSUER PROFILE · CIK 0001786205 · CUSIP 03940C100

Arcellx, Inc.ACLX

5 13D/G filings 3 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
5
1 SCHEDULE · 4 SC
Distinct filers
3
multi-activist cluster
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
2.52
as of 2026-04-15

13D/G Filings Timeline · 5 total

FiledFormFilerStakeSharesIntent
2025-02-27 SCHEDULE Elghandour Rami 6.90% 3,997,132 view →
2023-12-18 SC SR ONE CAPITAL MANAGEMENT, LLC view →
2023-06-02 SC SR ONE CAPITAL MANAGEMENT, LLC view →
2023-01-24 SC New Enterprise Associates 15, L.P. view →
2022-06-27 SC SR ONE CAPITAL MANAGEMENT, LLC view →

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-04-15 1,800,274 2.52 -20.7%
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%

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