UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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FORM 8-K

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CURRENT REPORT

Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): July 15, 2019

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Xenetic Biosciences, Inc.

(Exact name of registrant as specified in charter)

(781) 778-7720

(Registrant’s telephone number, including area code)

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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. A copy of the amendments are filed as Exhibit 2.1 and Exhibit 10.1 to this report and incorporated herein by reference.

(d) Exhibits

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.