Background

Xenetic Biosciences, Inc. (“Xenetic” or the “Company”), incorporated in the state of Nevada and based in Framingham, Massachusetts, is a biopharmaceutical company focused on advancing innovative immune-oncology technologies addressing difficult to treat cancers. The Company’s proprietary Deoxyribonuclease (“DNase”) technology is designed to improve outcomes of existing treatments, including immunotherapies, by targeting neutrophil extracellular traps (“NETs”), which are involved in cancer progression. Xenetic is currently focused on advancing its systemic DNase program into the clinic as an adjunctive therapy for pancreatic carcinoma and locally advanced or metastatic solid tumors.

As used in this Quarterly Report on Form 10-Q (“Quarterly Report”), unless otherwise indicated, all references herein to “Xenetic,” the “Company,” “we” or “us” refer to Xenetic Biosciences, Inc. and its wholly-owned subsidiaries.

The Company, directly or indirectly, through its wholly-owned subsidiaries, Hesperix S.A. (“Hesperix”) and Xenetic Biosciences (U.K.) Limited (“Xenetic UK”), and the wholly-owned subsidiaries of Xenetic UK, Lipoxen Technologies Limited (“Lipoxen”), Xenetic Bioscience, Incorporated and SymbioTec, GmbH (“SymbioTec”), own various United States (“U.S.”) federal trademark registrations and applications along with unregistered trademarks and service marks, including but not limited to XCART, OncoHist, PolyXen, ErepoXen and ImuXen which may be used throughout this Quarterly Report. All other company and product names may be trademarks of the respective companies with which they are associated.

Going Concern and Management’s Plan

Management evaluates whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date that the financial statements are issued. The Company has incurred substantial losses since its inception and expects to continue to incur operating losses in the near-term. The Company believes that its existing resources will be adequate to fund the Company’s operations for a period of at least twelve months from the date of the issuance of these financial statements. In addition, the Company raised net proceeds of $4.0 million in an underwritten offering of common stock in October 2025. However, the Company anticipates it will need additional capital in the long-term to pursue its business initiatives. While the Company believes it will continue to have access to capital resources through possible public or private equity offerings, debt financings, corporate collaborations, related party funding, or other means to continue as a going concern, the terms, timing and extent of any future financing will depend upon several factors, including the achievement of progress in its product development programs, its ability to identify and enter into licensing or other strategic arrangements, its continued listing on the Nasdaq Stock Market (“Nasdaq”), and factors related to financial, economic, geo-political, industry and market conditions, many of which are beyond its control. The capital markets for the biotech industry can be highly volatile, which makes the terms, timing and extent of any future financing uncertain.

Share Exchange Agreement

On September 14, 2026, Xenetic entered into a Share Exchange Agreement (the “Exchange Agreement”) with Santersus AG, a Swiss corporation (Aktiengesellschaft) (“Santersus”), the sellers listed on Schedule I thereto (each, a “Seller,” and collectively with the holders of Santersus securities who subsequently become parties to the Exchange Agreement, the “Sellers”) and Santersus, in its capacity as representative of the Sellers, pursuant to which, subject to the satisfaction or waiver of the conditions set forth in the Exchange Agreement, Xenetic will acquire the entire issued share capital of Santersus, with Santersus becoming a wholly owned subsidiary of Xenetic (the “Acquisition”).

At the closing of the Acquisition (the “Closing”), each issued and outstanding ordinary share of Santersus (the “Santersus Shares”) will be sold to Xenetic in exchange for a number of shares of Xenetic common stock, par value $0.001 per share (“Company Common Stock”), based on the exchange ratio set forth in the Exchange Agreement (the “Exchange Ratio”) rounded to the nearest whole share of Company Common Stock after aggregating all fractional shares of Company Common Stock issuable to each Seller. No fractional shares of Company Common Stock will be issued.

Immediately following the Closing, the holders of Santersus Shares are expected to own approximately 85% of the outstanding shares of Company Common Stock, with existing Xenetic stockholders owning the balance, on a fully diluted basis as calculated in the Exchange Agreement and assuming net cash (as defined in the Exchange Agreement) of $0 at the Closing. The final ownership percentages of the combined company that each party’s equity holders will own following the Closing are subject to certain adjustments as described in the Exchange Agreement, including the net cash calculation.

Completion of the Acquisition is subject to a number of conditions, including (i) approval by Xenetic’s stockholders; (ii) the effectiveness of a registration statement to register the shares issued in connection with the Acquisition and the absence of any related stop order; (iii) approval of the shares of Company Common Stock to be issued in the Acquisition for listing on Nasdaq, subject to official notice of issuance and consummation of the transactions contemplated by the Exchange Agreement; (iv) the accuracy of the representations and warranties, subject to certain materiality qualifications; (v) compliance by the parties with their respective covenants; (vi) no law or order preventing the Acquisition and related transactions; and (vii) certain other customary closing conditions. The Exchange Agreement contains certain termination rights for both Xenetic and Santersus, and further provides that upon termination of the Exchange Agreement under specified circumstances, Xenetic may be required to pay Santersus a termination fee of $500,000. In addition, under certain conditions, Xenetic and Santersus may each be required to reimburse the other party for fees and expenses up to $300,000.

Certain directors of Xenetic, Dr. Dmitry Genkin and Mr. Moshe Mizrahy, are affiliated with Santersus, with Dr. Genkin being a founder, shareholder, board member and Chief Scientific Officer of Santersus and Mr. Mizrahy being a shareholder and board member of Santersus. Because such directors of Xenetic are affiliated with Santersus, the Exchange Agreement and the Acquisition contemplated thereunder was evaluated and approved by Xenetic’s board of directors following a review and unanimous recommendation by the Special Committee of the board of directors, consisting solely of independent directors, as well as in consultation with an independent financial advisor. See Item 1A - Risk Factors, “Some Xenetic officers and directors have interests in the Acquisition that are different from our stockholders and that may influence them to support or approve the Acquisition without regard to the interests of our stockholders.”