The Board of Directors of Castellum has on 4 May 2023, by virtue of the authorisation from the Annual General Meeting held on 23 March 2023, resolved upon a fully underwritten new share issue of approximately SEK 10 billion with preferential rights for existing shareholders in order to strengthen the Company's financial position.

Through this press release, the Board of Directors of Castellum also announces the terms of the rights issue.

The rights issue in brief:

• The rights issue comprises a maximum of 164,200,484 new shares.

• Shareholders in Castellum have preferential rights to subscribe for one (1) new share per two (2) existing shares.

• The subscription price has been set to SEK 62 per share, which will, upon full subscription, result in total issue proceeds of approximately SEK 10,180 million before deduction of costs related to the rights issue.

• The purpose of the rights issue is to strengthen the Company's financial position.

• Akelius Residential Property AB (publ) ("Akelius Residential Property"), Castellum's largest shareholder representing 13.4 per cent of the shares and votes in Castellum1 , supports the decision of the rights issue and has undertaken to subscribe for its pro rata share (13.4 per cent) of the rights issue.

• Akelius Residential Property has, additionally, entered into a guarantee commitment to subscribe, subject to certain terms, for an additional 28.5 per cent of the rights issue without subscription rights.

• Citigroup Global Markets Europe AG and Nordea Bank Abp, filial i Sverige have entered into a guarantee commitment by way of an underwriting agreement, subject to customary terms, for the remaining part of the rights issue that is not covered by Akelius Residential Property's subscription undertaking and guarantee commitment, i.e. 58.1 per cent of the rights issue (divided equally between Citigroup Global Markets Europe AG and Nordea Bank Abp, filial i Sverige). Hence, 100 per cent of the rights issue is covered by subscription undertakings and guarantee commitments