REG - Quantum Data Energy - Holding(s) in Company

Mast Energy DevelopmentsAnnouncement

Tue 16:30

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RNS Number : 1681G  Quantum Data Energy PLC  04 November 2025

Quantum Data Energy PLC

(formerly Mast Energy Developments PLC)

(Incorporated in England and Wales)

(Registration Number: 12886458)

LEI :213800HFVHGJ9YGO9F71

Share code on the LSE: MAST

ISIN: GB00BNG90H86

('Quantum Data' or 'the Company')

 

Dated: 4 November 2025

 

Quantum Data Energy PLC

TR-1: Standard form for notification of major holdings

1. Issuer Details

ISIN

GB00BNG90H86

Issuer Name

MAST ENERGY DEVELOPMENTS 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

Peel Hunt LLP

City of registered office (if applicable)

London

Country of registered office (if applicable)

United Kingdom

4. Details of the shareholder

Full name of shareholder(s) if different from the person(s) subject to the
notification obligation, above

 

City of registered office (if applicable)

 

Country of registered office (if applicable)

 

5. Date on which the threshold was crossed or reached

31-Oct-2025

6. Date on which Issuer notified

03-Nov-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  10.246828                                             0.000000                                                                   10.246828                       3255000
 Position of previous notification (if applicable)                          Under 10%                                             0.000000                                                                   Under 10%

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)
 GB00BNG90H86                                 3255000                                  0                                            10.246828                           0.000000
 Sub Total 8.A                                3255000                                                                               10.246828%

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  % of voting rights
                                                                            exercised/converted

 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  Total of both if it equals or is higher than the notifiable threshold
                                                                                                                                          than the notifiable threshold

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

03-Nov-2025

13. Place Of Completion

London

 

TR-1: Standard form for notification of major holdings

1. Issuer Details

ISIN

GB00BNG90H86

Issuer Name

MAST ENERGY DEVELOPMENTS 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

Peel Hunt LLP

City of registered office (if applicable)

London

Country of registered office (if applicable)

United Kingdom

4. Details of the shareholder

Full name of shareholder(s) if different from the person(s) subject to the
notification obligation, above

 

City of registered office (if applicable)

 

Country of registered office (if applicable)

 

5. Date on which the threshold was crossed or reached

03-Nov-2025

6. Date on which Issuer notified

04-Nov-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  Below 10%                                             0.000000                                                                   Below 10%                       Below 10% of shares in issue
 Position of previous notification (if applicable)                          10.246828                                             0.000000                                                                   10.246828

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)
 GB00BNG90H86                                 Below 10% of shares in issue                                                          Below 10%
 Sub Total 8.A                                Below 10% of shares in issue                                                          Below 10%

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  % of voting rights
                                                                            exercised/converted

 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  Total of both if it equals or is higher than the notifiable threshold
                                                                                                                                          than the notifiable threshold

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

04-Nov-2025

13. Place Of Completion

London

 

 

 

 

 

ENDS

 

This announcement contains inside information for the purposes of the UK
version of the Market Abuse Regulation (EU No. 596/2014) as it forms part of
United Kingdom domestic law by virtue of the European Union (Withdrawal) Act
2018 ('UK MAR'). Upon the publication of this announcement, this inside
information is now considered to be in the public domain.

 

 Pieter Krügel      info@med.energy (mailto:info@med.energy)  Mast Energy           CEO

                                                              Developments PLC
 Guy Wheatley, CFA  +44 (0)203 411 7773                       Fortified Securities  Corporate Broker

 

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