During the period from 24 July to 3 August 2026, Castellum AB (LEI code: 549300GU5OHTR1T5IY68) (“Castellum”) repurchased a total of 1,534,351 own shares (ISIN: SE0000379190) under the two parallel share repurchase programmes initiated by Castellum’s Board of Directors and announced on 15 July 2026.

Repurchases of own shares under the first share repurchase programme (“Programme 1”) are carried out in accordance with the Nasdaq Nordic Main Market Rulebook for Issuers of Shares. Repurchases of own shares under the second share repurchase programme (“Programme 2”) are carried out in accordance with the EU Market Abuse Regulation (EU) No 596/2014 (“MAR”) and Commission Delegated Regulation (EU) 2016/1052 (the “Safe Harbour Regulation”).

The purpose of the share repurchase programmes is to adjust the company’s capital structure and thereby efficiently contribute to increased shareholder value.

Shares in Castellum have been repurchased as follows:

DateAggregated volume (number of shares)of which block transactions under Programme 1Weighted average price (SEK)Total transaction value (SEK)24 July 2026200,0000130.768126,153,62027 July 2026200,0000132.071026,414,20028 July 2026200,0000133.097126,619,42029 July 2026200,0000133.201926,640,38030 July 2026200,0000133.859726,771,94031 July 2026334,351134,351133.922244,777,0233 Aug 2026200,0000134.849526,969,900Total1,534,351134,351133.1811204,346,483

All repurchases were carried out on Nasdaq Stockholm by Carnegie Investment Bank AB (publ) on behalf of Castellum. Following the repurchases described above, Castellum’s holding of own shares amounts to 31,699,236 shares as of 3 August 2026. The total number of shares in Castellum is 477,526,355.

Complete information on the transactions carried out pursuant to Article 5.3 of MAR and Article 2.3 of the Safe Harbour Regulation is attached to this press release.

For further information, please contact:Christoffer Strömbäck, CFO, Castellum AB, +46 70 249 72 55

About CastellumCastellum is a Swedish property company that owns, manages, and develops commercial properties in growth cities. As of 30 June 2026, the property value amounted to approximately SEK 134 Bn. The company is listed on Nasdaq Stockholm Large Cap and is classified as green under the Green Equity Designation. Castellum is the only Swedish property company included in the Dow Jones Sustainability Indices (DJSI). Beyond expectations.www.castellum.com

AttachmentsRepurchase of shares in Castellum 24 July - 3 August 2026