Holding(s) in Company

Mantle Resilience PLC

20 October 2026

 

TR-1: Standard form for notification of major holdings

1. Issuer Details

ISIN

GB00BWYF7709

Issuer Name

MANTLE RESILIENCE PLC

UK or Non-UK Issuer

UK

2. Reason for Notification

An acquisition or disposal of voting rights

3. Details of person subject to the notification obligation

Name

Arena Investors, LP

City of registered office (if applicable)

New York

Country of registered office (if applicable)

United States

4. Details of the shareholder

Name	City of registered office	Country of registered office
Atlas Special Opportunities II, LLC	Grand Cayman	Cayman Islands

5. Date on which the threshold was crossed or reached

02-Sep-2026

6. Date on which Issuer notified

19-Oct-2026

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	5.783055	0.000000	5.783055	750000000
Position of previous notification (if applicable)	6.002172	0.000000	6.002172

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)
GB00BWYF7709	750000000	0	5.783055	0.000000
Sub Total 8.A	750000000		5.783055%

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

1. Person subject to the notification obligation is not controlled by any natural person or legal entity and does not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuer.

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

10. In case of proxy voting

Name of the proxy holder

Atlas Special Opportunities II, LLC

The number and % of voting rights held

750,000,000;  5.783055%

The date until which the voting rights will be held

  31/12/2026

If date does not apply, explain below

Unknown

11. Additional Information

Arena Investors, LP is providing this notification as the investment manager. Please note that effective September 11, 2026, Arena Investors, LP’s name has changed to CCaventus Asset Management LP. During a review of the position on 19 October 2026, we detected that a change in % of voting rights occurred due to a change in Shares Outstanding of the issuer on 2 September 2026.

12. Date of Completion

19-Oct-2026

13. Place Of Completion

Dallas, TX

 

END