Buy-back of shares in Castellum 9–17 June 2026

Castellum AB (LEI code: 549300GU5OHTR1T5IY68) (“Castellum”) has during the period from 9 June to 17 June 2026 repurchased, in total, 2,640,097 own shares (ISIN code: SE0000379190) under the share buy-back program initiated by the Board of Directors.

The share buy-backs form part of the share buy-back program which Castellum announced on 29 April 2026. The share buy-back program is being carried out in accordance with the EU Market Abuse Regulation (EU) No 596/2014 (“MAR”) and the Commission Delegated Regulation (EU) 2016/1052 (the “Safe Harbour Regulation”). The purpose of the share buy-back program is to adjust the company’s capital structure and thereby efficiently contribute to an increase in shareholder value.

Shares in Castellum have been repurchased as follows:

All acquisitions have been carried out on Nasdaq Stockholm by ABG Sundal Collier on behalf of Castellum. Following the above acquisitions, Castellum’s holding of own shares as of 17 June 2026 amounts to 23,324,000 shares. The total number of shares in Castellum is 477,526,355.

A full breakdown of the transactions pursuant to Article 5.3 of MAR and Article 2.3 of the Safe Harbour Regulation is attached to this press release.

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

About Castellum
Castellum is a Swedish property company that owns, manages, and develops commercial properties in growth cities. As of 31 March 2026, the property value amounted to approximately SEK 138 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

Attachments
Appendix - buyback of shares 9–17June 2026
Buy-back of shares in Castellum 9–17 June 2026