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Arcellx (ACLX) investor relations material

Arcellx Status Update summary

Complete event summary combining all related documents: earnings call transcript, report, and slide presentation.
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Status Update summary7 Dec, 2025

Efficacy and safety of anito-cel

  • Anito-cel demonstrated high efficacy in relapsed/refractory multiple myeloma, with a 96% overall response rate and 74% stringent complete response in phase 2, and durable responses up to six years in early patients.

  • Safety profile is highly favorable, with 95% of patients experiencing only grade 1 or no CRS, minimal ICANS, and no delayed neurotoxicities or secondary malignancies observed.

  • Sustained MRD negativity was achieved in 83% of patients at six months, and 24-month PFS and OS rates were 62% and 83%, respectively.

  • Manufacturing success rate was 99%, and the therapy is suitable for older and diverse patient populations.

  • Outpatient administration is feasible due to low toxicity, supporting broader adoption.

Differentiation from bispecifics and other CAR Ts

  • Anito-cel combines the efficacy and durability of CAR T with the safety and accessibility of bispecifics, offering low CRS/ICANS and broad scalability.

  • Bispecifics show higher infection rates, ICU admissions, and non-relapse mortality, with real-world efficacy and safety often inferior to clinical trial results.

  • Combination studies with Dara may inflate bispecific efficacy, but widespread frontline use of Dara limits real-world applicability.

  • Anito-cel is positioned as a category-defining therapy, with potential for mass adoption similar to disruptive innovations in other industries.

Commercialization and market opportunity

  • Commercial launch is imminent, with robust supply chain and manufacturing capacity through partnership with Kite, targeting up to 24,000 doses.

  • 82% of authorized treatment centers have been engaged pre-approval, and strong support from payers, physicians, and advocacy groups is reported.

  • Market models project a $12B second-line+ and $20B+ frontline+ opportunity, with conservative class share assumptions for CAR T.

  • The company expects to overachieve these assumptions due to anito-cel's unique profile and disruptive potential.

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Frequently asked questions

Arcellx, Inc. is a clinical-stage biotechnology company focused on developing innovative cell therapies for the treatment of cancer and other severe diseases. The company's approach centers around engineering immunotherapies, particularly those based on CAR-T cell technology, to target specific cancers. Arcellx is headquartered in Redwood City, California, and its shares are listed on NASDAQ.

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