Rockwool — Director's Dealing 2026

May 20, 2026

A

ROCKWOOL

Company announcement

for ROCKWOOL A/S

Release no. 17 - 2026

to Nasdaq Copenhagen

20 May 2026

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 share (DK0063855085)
b)	Nature of the transaction	Purchase
c)	Price(s) and volume(s)	Price(s)	Volume(s)
		200.068 DKK	17,641 shares
d)	Aggregated information - Aggregated volume - Price	17,641 shares 3,529,399.588 DKK
e)	Date of the transaction	2026-05-19
f)	Place of the transaction	Nasdaq Copenhagen A/S

ROCKWOOL A/S

Hovedgaden 584, DK-2640 Hedehusene, Denmark

T (+45) 46 56 03 00 E info@rockwool.com

ROCKWOOL A/S, VAT-number: 54879415

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ROCKWOOL

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
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	A share (DK0063855085)
	Identification code
b)	Nature of the transaction	Purchase
c)	Price(s) and volume(s)	Price(s)	Volume(s)
		200.874 DKK	250 shares
		200.892 DKK	250 shares
d)	Aggregated information	500 shares
	- Aggregated volume	100,441.50 DKK
	- Price
e)	Date of the transaction	2026-05-19
f)	Place of the transaction	Nasdaq Copenhagen A/S

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ROCKWOOL

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
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	A share (DK0063855085)
	Identification code
b)	Nature of the transaction	Purchase
c)	Price(s) and volume(s)	Price(s)	Volume(s)
		200.91 DKK	250 shares
		200.932 DKK	250 shares
d)	Aggregated information
	- Aggregated volume	500 shares
	- Price	100,460.50 DKK
e)	Date of the transaction	2026-05-19
f)	Place of the transaction	Nasdaq Copenhagen A/S

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ROCKWOOL

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
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	A share (DK0063855085)
	Identification code
b)	Nature of the transaction	Purchase
c)	Price(s) and volume(s)	Price(s)	Volume(s)
		200.945 DKK	200 shares
		200.938 DKK	300 shares
d)	Aggregated information
	- Aggregated volume	500 shares
	- Price	100,470.40 DKK
e)	Date of the transaction	2026-05-19
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

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