Rockwool

Transaction in Own Shares • Apr 2, 2025

Company announcement for ROCKWOOL A/S Release no. 17 – 2025 to Nasdaq Copenhagen

2 April 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 26 March – 1 April 2025:

Date	Number of B shares	Average purchase price B shares (DKK)	Aggregate amount, B shares (DKK)
[Accumulated, last	45,450		130,849,646
announcement]
26 March 2025	1,000	3,142.76	3,142,760
27 March 2025	1,000	3,080.76	3,080,760
28 March 2025	1,000	3,032.19	3,032,190
31 March 2025	3,000	2,863.24	8,589,720
1 April 2025	3,000	2,855.57	8,566,710
Accumulated under the programme (B shares)	54,450		157,261,786

With the transactions stated above, ROCKWOOL A/S owns 576,463 B shares corresponding to 2.67 percent of the Company's total share capital.

An overview showing the transaction data for the period 26 March – 1 April 2025 is enclosed.

Further information: Kim Junge Andersen Senior Vice President, CFO ROCKWOOL A/S +45 46 55 80 15

ROCKWOOL A/S Hovedgaden 584, DK-2640 Hedehusene, Denmark T (+45) 46 56 03 00 E info@rockwool.com