ROCKWOOD STRATEGIC PLC

Major Shareholding Notification • Dec 5, 2025

National Storage Mechanism | Additional information

RNS Number : 5345K

Rockwood Strategic PLC

05 December 2025

TR-1: Standard form for notification of major holdings

1. Issuer Details

ISIN

GB00BRRD5L66

Issuer Name

ROCKWOOD STRATEGIC PLC

UK or Non-UK Issuer

UK

2. Reason for Notification

An event changing the breakdown of voting rights

3. Details of person subject to the notification obligation

Name

Harwood Capital LLP

City of registered office (if applicable)

Country of registered office (if applicable)

Name	City of registered office	Country of registered office
Harwood Capital LLP	London	United Kingdom

4. Details of the shareholder

Name	City of registered office	Country of registered office
Harwood Holdco Limited	London	United Kingdom
Harwood Capital LLP	London	United Kingdom

5. Date on which the threshold was crossed or reached

5-Dec-2025

6. Date on which Issuer notified

5-Dec-2025

7. Total positions of person(s) subject to the notification obligation

	% of voting rights attached to shares (total of 8.A)	% of voting rights through financial instruments (total of 8.B 1 + 8.B 2)	Total of both in % (8.A + 8.B)	Total number of voting rights held in issuer
Resulting situation on the date on which threshold was crossed or reached	15.930000	0.000000	15.930000	8356390
Position of previous notification (if applicable)	16.950000	0.000000	16.950000

8. Notified details of the resulting situation on the date on which the threshold was crossed or reached

8A. Voting rights attached to shares

Class/Type of shares ISIN code(if possible)	Number of direct voting rights (DTR5.1)	Number of indirect voting rights (DTR5.2.1)	% of direct voting rights (DTR5.1)	% of indirect voting rights (DTR5.2.1)
GB00BRRD5L66	16390		0.030000
GB00BRRD5L66	8340000		15.900000
Sub Total 8.A	8356390		15.930000%

8B1. Financial Instruments according to (DTR5.3.1R.(1) (a))

Type of financial instrument	Expiration date	Exercise/conversion period	Number of voting rights that may be acquired if the instrument is exercised/converted	% of voting rights
Sub Total 8.B1

8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))

Type of financial instrument	Expiration date	Exercise/conversion period	Physical or cash settlement	Number of voting rights	% of voting rights
Sub Total 8.B2

9. Information in relation to the person subject to the notification obligation

2. Full chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held starting with the ultimate controlling natural person or legal entities (please add additional rows as necessary)

Ultimate controlling person	Name of controlled undertaking	% of voting rights if it equals or is higher than the notifiable threshold	% of voting rights through financial instruments if it equals or is higher than the notifiable threshold	Total of both if it equals or is higher than the notifiable threshold
Christopher Harwood Bernard Mills	Harwood Holdco Limited	15.930000		15.930000%
Christopher Harwood Bernard Mills	Harwood Capital LLP	0.030000		0.030000%

10. In case of proxy voting

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

11. Additional Information

12. Date of Completion

05/12/2025

13. Place Of Completion

London Stock Exchange

This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact [email protected] or visit www.rns.com.

RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy.

END

HOLEAXASELNSFFA