Rockwool

Transaction in Own Shares • Aug 6, 2025

Company announcement for ROCKWOOL A/S Release no. 46 – 2025 to Nasdaq Copenhagen

6 August 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 30 July – 5 August 2025:

Date	Number of B shares	Average purchase price B shares (DKK)	Aggregate amount, B shares (DKK)
[Accumulated, last announcement]	1,918,500		550,244,736
30 July 2025	17,000	290.36	4,936,120
31 July 2025	16,000	290.09	4,641,440
1 August 2025	25,000	274.40	6,860,000
4 August 2025	20,000	276.93	5,538,600
5 August 2025	20,000	279.85	5,597,000
Accumulated under the programme (B shares)	2,016,500		577,817,896

With the transactions stated above, ROCKWOOL A/S owns 2,463,356 B shares corresponding to 1.16 percent of the Company's total share capital.

An overview showing the transaction data for the period 30 July – 5 August 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