Arcellx to Present New Data for Its iMMagine-1 Study and Continues Scientific Momentum with Multiple Presentations at the 67th ASH Annual Meeting and Exposition

Arcellx, Inc. (NASDAQ: ACLX), a biotechnology company reimagining cell therapy through the development of innovative immunotherapies for patients with cancer and other incurable diseases, today announced it will share two presentations at the 67th American Society of Hematology (ASH) Annual Meeting and Exposition taking place December 6-9, 2025, in Orlando, Florida, including updated clinical data from iMMagine-1, its Phase 2 pivotal study (publication #256) of anitocabtagene autoleucel (anito-cel) in patients with relapsed and/or refractory multiple myeloma (RRMM). Additionally, an abstract (publication #7644) describing the fast off-rate of anito-cel’s D-Domain binder will be published in a supplemental issue of Blood in November 2025. The company will also have a medical affairs booth (#1363) at the Orange County Convention Center.

“We’re pleased to share that, along with our partners at Kite, we conducted our pre-BLA meeting with the FDA and remain confident in our planned 2026 commercial launch of anito-cel,” said Rami Elghandour, Arcellx’s Chairman and Chief Executive Officer. “This milestone marks a significant step toward bringing our innovative therapy to the multiple myeloma community. We look forward to sharing updated clinical data from our iMMagine-1 study in an oral presentation at ASH. These are exciting times at Arcellx!”

ASH Presentation Details:

Title: Phase 2 registrational study of anitocabtagene autoleucel for the treatment of patients with relapsed and/or refractory multiple myeloma: Updated results from iMMagine-1
Speaker: Krina K. Patel, MD, MSc, MD Anderson Cancer Center
Session Name: 655. Multiple Myeloma: Cellular Therapies: Clinical Trial Advances in CAR T-Cell Therapy for Multiple Myeloma
Session Date: Saturday, December 6, 2025
Session Time: 2:00 p.m. – 3:30 p.m. ET
Presentation Time: 2:45 p.m. ET
Location: OCCC – West Hall E1
Publication Number: 256
Submission ID: abs25-4541

Title: Visualizing geographic variation and systemic inequities of disease burden and CAR T-cell therapy access in multiple myeloma in the US
Speaker: Brandon Blue, MD, Moffitt Cancer Center
Session Name: 907. Outcomes Research: Plasma Cell Disorders: Poster III
Session Date: Monday, December 8, 2025
Session Time: 6:00 p.m. – 8:00 p.m. ET
Location: OCCC – West Halls B3-B4
Publication Number: 6344
Submission ID: abs25-2093

Title: The fast off-rate of anito-cel’s D-Domain binder contributes to its distinctive pharmacology profile in preclinical models of multiple myeloma