On July 15, 2019, Xenetic Biosciences, Inc. (the "Company") amended (i) that certain Share Purchase Agreement among the Company, Hesperix SA, a Swiss corporation ("Hesperix"), the owners of Hesperix (each, a "Seller" and collectively, the "Sellers"), and Alexey Andreevich Vinogradov, as the representative of each Seller, dated March 1, 2019, and (ii) that certain assignment agreement between the Company and OPKO Pharmaceuticals, LLC, dated as of March 1, 2019, to amend the date by which the parties will consummate the transaction pursuant to which the Company will acquire the XCART platform technology, as described in the proxy statement/prospectus for the Special Meeting, dated May 22, 2019, from July 15, 2019 to July 31, 2019 (Filing, 8-K, Xenetic Biosciences, JUL 15, 2019, View Source [SID1234537831]). A copy of the amendments are filed as Exhibit 2.1 and Exhibit 10.1 to this report and incorporated herein by reference.

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