NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN OR TO THE UNITED STATES, AUSTRALIA, HONG KONG, JAPAN, CANADA, NEW ZEALAND, SWITZERLAND, SINGAPORE, SOUTH AFRICA, SOUTH KOREA, RUSSIA, BELARUS OR ANY OTHER JURISDICTION WHERE DISTRUBTION OF THIS PRESS RELEASE WOULD BE ILLEGAL OR REQUIRE ADDITIONAL ACTIONS THAN SUCH ACTIONS RESULTING FROM SWEDISH LAW. SEE THE "IMPORTANT INFORMATION" SECTION AT THE END OF THIS PRESS RELEASE.

Katalysen Ventures AB (publ) ("Katalysen" or the "Company") publishes information document in connection with the Company's share issue with preferential rights for existing holders of approximately SEK 8.4 million at a subscription price of SEK 6.0 per share (the "Rights Issue"). In the event of oversubscription Katalysen can also decide to utilize an overallotment issue (the "Overallotment Issue") to raise up to an additional SEK 3.0 million. The Company has no obligation to utilize the Overallotment Issue. The information document is available on the Company's website.

No prospectus has been prepared in connection with the Rights Issue. Instead, the Company has prepared and published a simplified information document in accordance with Spotlight Stock Market's regulations (the "Information Document").

The Information Document is available on the Company's website, www.katalysen.com.

Summary:

• Rights Issue of 1,400,988 shares, corresponding to, at full subscription, proceeds of approximately SEK 8.4 million before issue costs. If fully subscribed the costs related to the Rights Issue are expected to amount to approximately SEK 1.0 million.
• The Rights Issue is carried out by exercise of the authorization granted by the annual general meeting on 24 April 2025. The Overallotment Issue is conditional upon a resolution by the Board of Directors to utilize the Overallotment Issue, as well as the approval of an extraordinary general meeting.
• Existing holders of shares will receive seven (7) subscription rights for each share held in Katalysen. Forty-one (41) subscription rights entitle the holder to subscribe for one (1) new share.
• The subscription price has been set at SEK 6.0 per share. The subscription price will apply to both the Rights Issue and the potential Overallotment Issue.
• The Rights Issue is secured in writing by members of the board, management and existing shareholders to a total of approximately 48.5 percent (corresponding to approximately SEK 4.1 million) through subscription and guarantee commitments (free-of-charge top guarantee).
• The record date for the Rights Issue is 23 June 2025.
• The subscription period in the Rights Issue runs from and including 24 June 2025 until and including 8 July 2025.

Timetable for the Rights Issue

• Record date for participation in the Rights Issue: 23 June 2025.
• Subscription period: 24 June 2025 - 8 July 2025.
• Trading in subscription rights: 24 June 2025 - 3 July 2025.
• Trading in BTA: from 24 June 2025, until the Rights Issue has been registered with the Swedish Companies Registration Office. The last day for trading in BTA will be announced through a separate press release after the Rights Issue has been completed.
• Press release on the outcome of the Rights Issue: expected around 9 July 2025.

Advisors

In connection with the Rights Issue, Katalysen Ventures AB has engaged Sedermera Corporate Finance AB as financial advisor, Foyen Advokatfirma i Sverige KB as legal advisor and Nordic Issuing AB as issuing agent.

For further information about the Rights Issue, please contact:

Sedermera Corporate Finance AB

Phone: +46 (0)40 615 14 10

E-mail: cf@sedermera.se

www.sedermera.se

For more information about the Company, please contact:

CEO Anders Dahlgren

E-mail: ad@katalysen.com

Web: www.katalysen.com

Important information

The release, announcement or distribution of this press release may, in certain jurisdictions, be subject to legal restrictions. The recipients of this press release in jurisdictions where this press release has been published or distributed shall inform themselves of and follow such legal 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 Katalysen in any jurisdiction, neither from Katalysen nor from someone else.

This press release is not a prospectus for the purposes of the prospectus regulation and has not been approved by any regulatory authority in any jurisdiction. No prospectus will be prepared in connection with the Rights Issue. The Company has prepared and published a simplified Information Document in accordance with Spotlight Stock Market's regulations.

This press release does not identify or suggest, or purport to identify or suggest, the risks (direct or indirect) that may be associated with an investment in the Company. The information contained in this announcement relating to the Rights Issue 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 press release 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 US 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. There is no intention to register any securities referred to herein in the United States or to make a public Rights Issue 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 USA, Australia, Belarus, Canada, Hong Kong, Japan, New Zeeland, Russia, Singapore, South Africa, South Korea, Switzerland 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.

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" 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.

Forward-looking statements

This press release contains forward-looking statements that reflect the Company's intentions, beliefs, or current expectations about and targets for the Company's and the group's future results of operations, financial condition, liquidity, performance, prospects, anticipated growth, strategies and opportunities and the markets in which the Company and the group operates. Forward-looking statements are statements that are not historical facts and may be identified by words such as "believe", "expect", "anticipate", "intend", "may", "plan", "estimate", "will", "should", "could", "aim" or "might", or, in each case, their negative, or similar expressions. The forward-looking statements in this press release are based upon various assumptions, many of which are based, in turn, upon further assumptions. Although the Company believes that the expectations reflected in these forward-looking statements are reasonable, it can give no assurances that they will materialize or prove to be correct. Because these statements are based on assumptions or estimates and are subject to risks and uncertainties, the actual results or outcome could differ materially from those set out in the forward-looking statements as a result of many factors. Such risks, uncertainties, contingencies and other important factors could cause actual events to differ materially from the expectations expressed or implied in this release by such forward-looking statements. The Company does not guarantee that the assumptions underlying the forward-looking statements in this press release are free from errors and readers of this press release should not place undue reliance on the forward-looking statements in this press release. The information, opinions and forward-looking statements that are expressly or implicitly contained herein speak only as of its date and are subject to change without notice. Neither the Company nor anyone else undertake to review, update, confirm or to release publicly any revisions to any forward-looking statements to reflect events that occur or circumstances that arise in relation to the content of this press release, unless it is required by law or Spotlight Stock Market's rule book for issuers.