Rockwool

Transaction in Own Shares • Jul 2, 2025

Company announcement for ROCKWOOL A/S Release no. 41 – 2025 to Nasdaq Copenhagen

2 July 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 25 June – 1 July 2025:

Date	Number of B shares	Average purchase price B shares (DKK)	Aggregate amount, B shares (DKK)
[Accumulated, last announcement]	1,452,500		415,644,176
25 June 2025	20,000	287.83	5,756,600
26 June 2025	20,000	287.66	5,753,200
27 June 2025	18,000	295.63	5,321,340
30 June 2025	17,000	296.93	5,047,810
1 July 2025	16,000	289.04	4,624,640
Accumulated under the programme (B shares)	1,543,500		442,147,766

With the transactions stated above, ROCKWOOL A/S owns 1,990,356 B shares corresponding to 0.94 percent of the Company's total share capital.

An overview showing the transaction data for the period 25 June – 1 July 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