Regulatory press release

Report on transactions of executives and related parties in ROCKWOOL A/S shares

Company announcement
for ROCKWOOL A/S
Release no. 51 – 2025
to Nasdaq Copenhagen

21 August 2025

Report on transactions of executives and related parties in ROCKWOOL A/S shares

ROCKWOOL A/S has received and hereby provides notification pursuant to article 19 of regulation (EU) no. 596/2014 of the below transactions related to shares in ROCKWOOL A/S made by persons discharging managerial responsibilities and/or persons closely related with them.

1 Details of the person discharging managerial responsibilities/person closely associated
a) Name: Thomas Kähler

2 Reason for the notification
a) Position/status: Chairman of the Board of Directors

b) Initial notification/Amendment: Initial notification

3 Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a) Name: ROCKWOOL A/S

b) LEI: 213800QRC7LNX935OZ09

4 Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted
a) Description of the financial instrument, type of instrument
Identification code:

A shares (DK0063855085)

b) Nature of the transaction: Purchase
c) Price(s) and volume(s):

Price(s)	Volume(s)
242.81 DKK	24,600

d) Aggregated information:

Aggregated volume: -
Price: -

e) Date of the transaction: 2025-08-20

f) Place of the transaction: Nasdaq Copenhagen A/S

1 Details of the person discharging managerial responsibilities/person closely associated
a) Name: Christian Juel Kähler

2 Reason for the notification
a) Position/status: Person closely associated with Thomas Kähler, Chairman of the Board of Directors of ROCKWOOL A/S

b) Initial notification/Amendment: Initial notification

3 Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a) Name: ROCKWOOL A/S
b) LEI: 213800QRC7LNX935OZ09

Identification code:

A shares (DK0063855085)

b) Nature of the transaction: Purchase
c) Price(s) and volume(s):

Price(s)	Volume(s)
242.82 DKK	730

d) Aggregated information:

Aggregated volume: -
Price: -

e) Date of the transaction: 2025-08-20
f) Place of the transaction: Nasdaq Copenhagen A/S

1 Details of the person discharging managerial responsibilities/person closely associated
a) Name: Helena Juel Kähler

2 Reason for the notification
a) Position/status: Person closely associated with Thomas Kähler, Chairman of the Board of Directors of ROCKWOOL A/S

b) Initial notification/Amendment: Initial notification

3 Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a) Name: ROCKWOOL A/S
b) LEI: 213800QRC7LNX935OZ09

Identification code:

A shares (DK0063855085)

b) Nature of the transaction: Purchase
c) Price(s) and volume(s):

Price(s)	Volume(s)
242.82 DKK	730

d) Aggregated information:

Aggregated volume: -
Price: -

e) Date of the transaction: 2025-08-20
f) Place of the transaction: Nasdaq Copenhagen A/S

1 Details of the person discharging managerial responsibilities/person closely associated
a) Name: Valdemar Juel Kähler

2 Reason for the notification
a) Position/status: Person closely associated with Thomas Kähler, Chairman of the Board of Directors of ROCKWOOL A/S
b) Initial notification/Amendment: Initial notification

3 Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a) Name: ROCKWOOL A/S
b) LEI: 213800QRC7LNX935OZ09

Identification code:

A shares (DK0063855085)

b) Nature of the transaction: Purchase
c) Price(s) and volume(s):

Price(s)	Volume(s)
242.82 DKK	730

d) Aggregated information:

Aggregated volume: -
Price: -

e) Date of the transaction: 2025-08-20
f) Place of the transaction: Nasdaq Copenhagen A/S

1 Details of the person discharging managerial responsibilities/person closely associated
a) Name: Jørgen Tang-Jensen

2 Reason for the notification
a) Position/status: Deputy Chairman of the Board of Directors

b) Initial notification/Amendment: Initial notification

3 Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a) Name: ROCKWOOL A/S

b) LEI: 213800QRC7LNX935OZ09

B shares (DK0063855168)

b) Nature of the transaction: Purchase
c) Price(s) and volume(s):

Price(s)	Volume(s)
244.96 DKK	2,052

d) Aggregated information:

Aggregated volume: -
Price: -

e) Date of the transaction: 2025-08-20

f) Place of the transaction: Nasdaq Copenhagen A/S

1 Details of the person discharging managerial responsibilities/person closely associated
a) Name: Chloe Kähler

2 Reason for the notification
a) Position/status: Person closely associated with Carsten Kähler, member of the Board of Directors of ROCKWOOL A/S
b) Initial notification/Amendment: Initial notification

3 Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a) Name: ROCKWOOL A/S
b) LEI: 213800QRC7LNX935OZ09

Identification code:

A shares (DK0063855085)

b) Nature of the transaction: Purchase
c) Price(s) and volume(s):

Price(s)	Volume(s)
244.45 DKK	600

d) Aggregated information:

Aggregated volume: -
Price: -

e) Date of the transaction: 2025-08-20
f) Place of the transaction: Nasdaq Copenhagen A/S

Further information:

Torben Schwaner Dehlholm
Group General Counsel
ROCKWOOL A/S
+45 46 56 03 00

Attachment

SE-2025-51_EN