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Buy-back of shares in Castellum 11–19 May 2026

MARKN.

Castellum AB (LEI code: 549300GU5OHTR1T5IY68) (“Castellum”) has during the period from 11 May to 19 May 2026 repurchased, in total, 2,426,000 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:

DateAggregated volume (number of shares)Weighted average share price (SEK)Total transaction value (SEK)
11/05/2026400,000123.287149,314,840
12/05/2026428,000123.914053,035,192
13/05/2026410,000122.923950,398,799
15/05/2026400,000123.091349,236,520
18/05/2026397,000122.756348,734,251
19/05/2026391,000125.368949,019,240
Total2,426,000123.5527299,738,842

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 19 May 2026 amounts to 15,460,903 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