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Hansa Biopharma AB (publ), ("Hansa" or the "Company") (Nasdaq Stockholm: HNSA) on October 2, 2025, announced that the Board of Directors has resolved on a directed share issue of 17,000,000 ordinary shares (the "Directed Share Issue").

Solely for the purpose of admission to trading of the newly issued ordinary shares on Nasdaq Stockholm, a disclosure document prepared in accordance with Article 1.5 ba of and Annex IX to Regulation (EU) 2017/1129 of the European Parliament and of the Council has been filed with the Swedish Financial Supervisory Authority (Sw. Finansinspektionen) and is available on the Company's website. Trading in the newly issued ordinary shares is expected to commence on Nasdaq Stockholm on or around October 6, 2025.

Contacts for more information:

Evan Ballantyne, Chief Financial Officer
IR@hansabiopharma.com

Kerstin Falck, VP Corporate Affairs

IR@hansabiopharma.com

The information was submitted for publication, through the agency of the contact persons above, on October 2, 2025 at 08:30 (CEST).

About Hansa Biopharma

Hansa Biopharma AB is a pioneering commercial-stage biopharmaceutical company on a mission to develop and commercialize innovative, lifesaving and life-altering treatments for patients with rare immunological conditions. The company has a rich and expanding research and development program based on its proprietary IgG-cleaving enzyme technology platform, to address serious unmet medical needs in autoimmune diseases, gene therapy and transplantation. The company's portfolio includes imlifidase, a first-in-class immunoglobulin G (IgG) antibody-cleaving enzyme therapy, which has been shown to enable kidney transplantation in highly sensitized patients and HNSA-5487, a next-generation IgG cleaving molecule with redosing potential. Hansa Biopharma is based in Lund, Sweden, and has operations in Europe and the U.S. The company is listed on Nasdaq Stockholm under the ticker HNSA. Find out more at www.hansabiopharma.com and follow us on LinkedIn.

©2025 Hansa Biopharma AB. Hansa Biopharma, the beacon logo, IDEFIRIX, and IDEFIRIX flower logo are trademarks of Hansa Biopharma AB, Lund, Sweden. All rights reserved.

Important Information

The release, announcement or distribution of this press release may, in certain jurisdictions, be subject to restrictions and the recipients of this press release in jurisdictions where this press release has been published or distributed shall inform themselves of and follow such restrictions. The recipient of this press release is responsible for using this press release, and the information contained herein, in accordance with applicable rules in each jurisdiction. This press release does not constitute an offer, or a solicitation of any offer, to buy or subscribe for any securities in Hansa in any jurisdiction, neither from Hansa nor from someone else.

Any investment decision in connection with the Directed Share Issue must be made on the basis of all publicly available information relating to the Company and the Company's shares. Such information has not been independently verified by the Joint Bookrunners. The information contained in this announcement is for background purposes only and does not purport to be full or complete. No reliance may be placed for any purpose on the information contained in this announcement or its accuracy or completeness.

This press release does not constitute or form part of an offer or solicitation to purchase or subscribe for securities in the United States. The securities referred to herein may not be sold in the United States absent registration or an exemption from registration under the U.S. Securities Act of 1933, as amended (the "Securities Act"), and may not be offered or sold within the United States absent registration or an applicable exemption from, or in a transaction not subject to, the registration requirements of the Securities Act. The securities referred to herein have not been registered under the Securities Act and there is no intention to register any securities referred to herein in the United States or to make a public offering of the securities in the United States. The information in this press release may not be announced, published, copied, reproduced or distributed, directly or indirectly, in whole or in part, within or into the United States, the United Kingdom, Canada, Hong Kong, Australia, South Africa, Japan, Switzerland, Israel, New Zealand or in any other jurisdiction where such announcement, publication or distribution of the information would not comply with applicable laws and regulations or where such actions are subject to legal restrictions or would require additional registration or other measures than what is required under Swedish law. Actions taken in violation of this instruction may constitute a crime against applicable securities laws and regulations.

This announcement is not a prospectus for the purposes of Regulation (EU) 2017/1129 (the "Prospectus Regulation") and has not been approved by any regulatory authority in any jurisdiction. Hansa has not authorized any offer to the public of shares or other securities in any member state of the EEA. A disclosure document prepared in accordance with Article 1.5 ba and Annex IX of the Prospectus Regulation has been published by the Company due to the number of new shares that will be admitted to trading on Nasdaq Stockholm. In any EEA Member State, this communication is only addressed to and is only directed at qualified investors in that Member State within the meaning of the Prospectus Regulation.

In the United Kingdom, this document and any other materials in relation to the securities described herein is only being distributed to, and is only directed at, and any investment or investment activity to which this document relates is available only to, and will be engaged in only with, "qualified investors" (within the meaning of the Prospectus Regulation as it forms part of domestic law in the United Kingdom by virtue of the European Union (Withdrawal) Act 2018), who are (i) persons having professional experience in matters relating to investments who fall within the definition of "investment professionals" in Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (the "Order"); or (ii) high net worth entities falling within Article 49(2)(a) to (d) of the Order (all such persons together being referred to as "relevant persons"). In the United Kingdom, any investment or investment activity to which this communication relates is available only to, and will be engaged in only with, relevant persons. Persons who are not relevant persons should not take any action on the basis of this press release and should not act or rely on it.