SAB Biotherapeutics, Inc. (NASDAQ:SABS), a clinical-stage biopharmaceutical company developing a fully human anti-thymocyte immunoglobulin (hATG) for type 1 diabetes (T1D) and other autoimmune diseases, today announced that it has commenced an underwritten public offering of shares of its common stock (and, in lieu of common stock to certain investors, pre-funded warrants to purchase shares of common stock). SAB BIO also intends to grant the underwriters a 30-day option to purchase up to an additional 15% of the of the securities to be sold in the proposed offering at the public offering price, less underwriting discounts and commissions. All of the shares (and any pre-funded warrants) in the proposed offering are to be sold by SAB BIO.

The Company intends to use the net proceeds it receives from this offering, together with its existing cash, cash equivalents and marketable securities, primarily to fund the continued development of our clinical stage product candidate, SAB-142 through ongoing and planned clinical trials, as well as for related manufacturing, regulatory, and operational activities, and for working capital and general corporate purposes.

Jefferies, UBS Investment Bank, Citigroup, and Barclays are acting as joint book-running managers for the offering. Chardan is acting as lead manager. The offering is subject to market and other conditions, and there can be no assurance as to whether or when the offering may be completed or as to the actual size or terms of the offering.