Airthings ASA – New share capital issued. Mandatory offer triggered

Reference is made to the stock exchange announcement published by Airthings ASA (the "Company") on 11 September 2025 regarding the successful completion of a fully underwritten NOK 105 million capital injection through a NOK 80 million private placement (the "Private Placement") of new shares (the "New Shares") followed by a NOK 25 million subsequent offering (the "Subsequent Offering").

The share capital increase pertaining to the Private Placement has now been registered with the Norwegian Register of Business Enterprises. Following the registration, the Company's new share capital is NOK 9,993,018.46, divided on 999,301,846 shares, each with a nominal value of NOK 0.01.

As a result of the issuance and subsequent delivery of the New Shares, Firda AS ("Firda") holds 416,570,184 shares in the Company, representing approximately 41.69% of the outstanding shares and votes. As stated in the announcement of 11 September 2025, and under Chapter 6 of the Norwegian Securities Trading Act, Firda has with this triggered an obligation to make a mandatory offer for the remaining shares in the Company not already owned by it at NOK 0.10 per share (the highest price paid by it the last six months). Firda has confirmed that it will make such offer as soon as practicably possible, following approval by Finanstilsynet of the offer document. As stated in previous announcements, the underwriters and subscribers in the Private Placement have all undertaken not to accept such mandatory offer for any shares held by them.

This information is published in accordance with disclosure requirements of the Euronext Oslo Rule Book II and section 5-12 of the Norwegian Securities Trading Act.