This amendment follows the execution of the binding term sheet announced on February 18, 2020. Under this amendment, Cellectis grants to Servier an expanded exclusive worldwide license to develop and commercialize all next generation gene-edited allogeneic CAR T-cell products targeting CD19, including rights to ALLO-501A, an anti-CD19 candidate in which the rituximab recognition domains have been removed, either directly or through its US sublicensee, Allogene Therapeutics. Financial terms are improved to include an additional USD 27.6 million (EUR 25 million) upfront payment, as well as up to USD 410 million (EUR 370 million) in clinical and commercial milestones. The royalty rate is increased from tiered high single-digit royalties to flat low double-digit royalties based on net sales of products.