Rockwool

Transaction in Own Shares • Nov 19, 2025

Company announcement for ROCKWOOL A/S Release no. 66 – 2025 to Nasdaq Copenhagen

19 November 2025

ROCKWOOL A/S – transactions in connection with share buy-back programme

As mentioned in announcement no. 07/2025, ROCKWOOL A/S has initiated a share buy-back programme which will run from 7 February 2025 until 5 February 2026. During this period, the Company will buy own shares for up to a maximum of 150 MEUR.

The programme is implemented in accordance with EU Commission Regulation No 596/2014 of 16 April 2014 and EU Commission Delegated Regulation No 2016/1052 of 8 March 2016, which together constitute the "Safe Harbour" regulation.

The following transactions have been executed during the period 12 – 18 November 2025:

Date	Number of B shares	Average purchase price B shares (DKK)	Aggregate amount, B shares (DKK)
[Accumulated, last announcement]	3,542,500		946,183,276
12 November 2025	25,000	208.19	5,204,750
13 November 2025	23,000	210.74	4,847,020
14 November 2025	25,000	205.59	5,139,750
17 November 2025	23,000	204.23	4,697,290
18 November 2025	25,000	199.85	4,996,250
Accumulated under the programme (B shares)	3,663,500		971,068,336

With the transactions stated above, ROCKWOOL A/S owns 4,110,356 B shares corresponding to 1.94 percent of the Company's total share capital.

An overview showing the transaction data for the period 12 – 18 November 2025 is enclosed.

Further information: Kim Junge Andersen

Senior Vice President, CFO ROCKWOOL A/S

+45 46 55 80 15