Exhibit 99.1 Adaptimmune Reports Q1 2024 Financial and Business Updates Afami-cel commercial and regulatory update presented at Company’s Investor Day (replay HERE); FDA review and inspections progressing with PDUFA date of August 4th, 2024 Commercial and manufacturing infrastructure in place to support afami-cel commercial launch upon approval Data from SPEARHEAD-1 pivotal trial with afami-cel published in The Lancet; data from a planned interim analysis of pivotal lete-cel IGNYTE-ESO trial to be presented ...