Allogene Therapeutics, Inc.

Cautionary Note on Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are based on management’s current expectations and assumptions and involve risks and uncertainties that could cause actual results to differ materially from those expressed or implied by such statements. In some cases, forward-looking statements may be identified by words such as “expect,” “believe,” “aim,” “plan,” “intend,” “seek,” “estimate,” “target,” “potential,” “may,” “could,” “will,” “would,” “should,” “anticipate,” “support,” “designed to,” “working to” and similar expressions. Forward-looking statements in this press release include, but are not limited to, statements regarding the timing, design, conduct, and results of Allogene’s clinical trials and analyses (including the interim futility analysis and MRD clearance outcomes from the Phase 2 ALPHA3 trial of cema-cel and updates from the Phase 1 RESOLUTION trial of ALLO-329); the potential clinical benefits, safety, tolerability, durability, and efficacy of Allogene’s product candidates; the potential for MRD-guided first-line consolidation to improve outcomes in LBCL; the potential to deliver allogeneic CAR T therapy in outpatient and community care settings and expand access across academic and community care settings; the potential to reduce or eliminate conventional lymphodepletion; expectations regarding clinical trial execution and operational performance; and expectations regarding Allogene’s financial position, cash runway, and 2026 operating outlook. Actual results may differ materially from those indicated by these forward-looking statements as a result of various important factors, including, but not limited to, risks and uncertainties inherent in clinical development (including that interim or early data may not be predictive of later or final results or clinical outcomes), patient enrollment and trial execution risks, uncertainties related to MRD testing and its clinical significance, the occurrence of adverse safety events, regulatory risks and uncertainties, manufacturing and CMC risks, reliance on third parties and licensors, competitive developments, intellectual property and contractual risks, and financial risks, including the need for additional capital. These and other risks and uncertainties are described more fully in Allogene’s filings with the Securities and Exchange Commission (SEC), including under the heading “Risk Factors” in its Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, being filed with the SEC today. All forward-looking statements in this press release speak only as of the date of this press release, and Allogene undertakes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by law.

Dagger® is a trademark of Allogene Therapeutics, Inc.

Allogene’s investigational AlloCAR T oncology products utilize Cellectis technologies. Cemacabtagene ansegedleucel (cema-cel) was developed based on an exclusive license granted by Cellectis to Servier. Servier has granted Allogene exclusive rights to cema-cel in the U.S., all EU Member States and the United Kingdom. The anti-CD70 AlloCAR T program is licensed exclusively from Cellectis by Allogene and Allogene holds global development and commercial rights to this AlloCAR T program. ALLO-329 (CD19/CD70) in autoimmune disease uses CRISPR gene-editing technology.