Seplat Energy PlcLSE: SEPL

Notification of major holdings

· Issued by Seplat Energy Plc

Seplat Energy Plc ("Seplat Energy" or the "Company")

Notification of Major Holdings



Lagos and London, 6 January 2026: The Company has received formal notification of the sale of 120,400,000 ordinary shares by major shareholder - Etablissements Maurel & Prom S.A. ("M&P"). The shares were acquired as follows:

  • 86,639,377 ordinary shares by Heirs Energies Limited.

  • 33,760,623 ordinary shares by Heirs Holdings Limited.

Following this transaction, M&P no longer holds any shares in the Company while Heirs Energies Limited and Heirs Holdings Limited now jointly hold 120,400,000 ordinary shares, representing 20.07% of the Company's issued share capital.

M&P was a founding investor in Seplat Energy and remained one of the Company's largest shareholders until now. The Company recognises and appreciates the significant role M&P has played in supporting Seplat Energy's growth and development into a leading independent Nigerian energy company and wishes M&P every success in its future endeavours.

Seplat Energy is pleased to welcome Heirs Energies Limited and Heirs Holdings Limited as shareholders and looks forward to working together to continue advancing Seplat's strategic objectives and long-term ambition of becoming a leading African energy champion.

Further details of the transaction are set out in the attached TR-1 Standard Form for Notification of Major Holdings by M&P and the new shareholders - Heirs Energies Limited and Heirs Holdings Limited.



For: Seplat Energy Plc

Eleanor Adaralegbe

Chief Financial Officer



TR-1: Standard form for notification of major holdings

1. Issuer Details

ISIN

NGSEPLAT0008

Issuer Name

SEPLAT ENERGY PLC

UK or Non-UK Issuer

Non-UK

2. Reason for Notification

An acquisition or disposal of voting rights

3. Details of person subject to the notification obligation

Name

Etablissements Maurel & Prom S.A.

City of registered office (if applicable)

Paris

Country of registered office (if applicable)

France

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

30-Dec-2025

6. Date on which Issuer notified

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

0.000000

0.000000

0.000000

0

Position of previous notification (if applicable)

02-Jan-2026

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)

NGSEPLAT0008

0

0

0.000000

0.000000

Sub Total 8.A

0

0.000000%

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

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

8A. Voting rights attached to shares

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 The number and % of voting rights held The date until which the voting rights will be held
  1. Additional Information

  2. Date of Completion

  3. Place Of Completion

Paris, France

TR-1: Standard form for notification of major holdings

1a. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached ii:

Seplat Energy Plc

1b. Please indicate if the issuer is a non-UK issuer (please mark with an "X" if appropriate)

Non-UK issuer

X

2. Reason for the notification (please mark the appropriate box or boxes with an "X")

An acquisition or disposal of voting rights

X

An acquisition or disposal of financial instruments

An event changing the breakdown of voting rights

Other (please specify) iii:

3. Details of person subject to the notification obligation iv

Name

Heirs Energies Limited

City and country of registered office (if applicable)

Lagos, Nigeria

4. Full name of shareholder(s) (if different from 3.) v

Name

City and country of registered office (if applicable)

5. Date on which the threshold was crossed or reached vi:

31/12/2025

6. Date on which issuer notified (DD/MM/YYYY):

05/01/2026

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 (8.A + 8.B) vii

Resulting situation on the date on which threshold was crossed or reached

14.44%

14.44%

Position of previous notification (if applicable)



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

A: Voting rights attached to shares

Class/type of shares

ISIN code (if possible)

Number of voting rights ix

% of voting rights

Direct

(DTR5.1)

Indirect

(DTR5.2.1)

Direct

(DTR5.1)

Indirect

(DTR5.2.1)

Ordinary Shares

86,639,377

14.44%

SUBTOTAL 8. A

86,639,377

14.44%

B 1: Financial Instruments according to DTR5.3.1R (1) (a)

Type of financial instrument

Expiration date x

Exercise/ Conversion Period xi

Number of voting rights that may be acquired if the instrument is exercised/converted.

% of voting rights

SUBTOTAL 8. B 1

B 2: Financial Instruments with similar economic effect according to DTR5.3.1R (1) (b)

Type of financial instrument

Expiration date x

Exercise/ Conversion Period xi

Physical or cash Settlement xii

Number of voting rights

% of voting rights

SUBTOTAL 8.B.2

9. Information in relation to the person subject to the notification obligation (please mark the

applicable box with an "X")

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 xiii

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 entity (please add additional rows as necessary) xiv

X

Name xv

% 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

Heirs Alliance Limited

60% in Heirs Holdings Limited

60%

Heirs Holdings Limited

99% in TNOG Limited

99%

TNOG Limited

49% in Heirs Energies

49%

HHOG Limited

51% in Heirs Energies

51%

10. In case of proxy voting, please identify:

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 xvi

Place of completion

Lagos, Nigeria

Date of completion

31/12/2025

TR-1: Standard form for notification of major holdings

1a. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached ii:

Seplat Energy Plc

1b. Please indicate if the issuer is a non-UK issuer (please mark with an "X" if appropriate)

Non-UK issuer

X

2. Reason for the notification (please mark the appropriate box or boxes with an "X")

An acquisition or disposal of voting rights

X

An acquisition or disposal of financial instruments

An event changing the breakdown of voting rights

Other (please specify) iii:

3. Details of person subject to the notification obligation iv

Name

Heirs Holdings Limited

City and country of registered office (if applicable)

Lagos, Nigeria

4. Full name of shareholder(s) (if different from 3.) v

Name

City and country of registered office (if applicable)

5. Date on which the threshold was crossed or reached vi:

31/12/2025

6. Date on which issuer notified (DD/MM/YYYY):

05/01/2026

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 (8.A + 8.B) vii

Resulting situation on the date on which threshold was crossed or reached

5.63%

5.63%

Position of previous notification (if applicable)



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

A: Voting rights attached to shares

Class/type of shares

ISIN code (if possible)

Number of voting rights ix

% of voting rights

Direct

(DTR5.1)

Indirect

(DTR5.2.1)

Direct

(DTR5.1)

Indirect

(DTR5.2.1)

Ordinary Shares

33,760,623

5.63%

SUBTOTAL 8. A

33,760,623

5.63%

B 1: Financial Instruments according to DTR5.3.1R (1) (a)

Type of financial instrument

Expiration date x

Exercise/ Conversion Period xi

Number of voting rights that may be acquired if the instrument is exercised/converted.

% of voting rights

SUBTOTAL 8. B 1

B 2: Financial Instruments with similar economic effect according to DTR5.3.1R (1) (b)

Type of financial instrument

Expiration date x

Exercise/ Conversion Period xi

Physical or cash Settlement xii

Number of voting rights

% of voting rights

SUBTOTAL 8.B.2

9. Information in relation to the person subject to the notification obligation (please mark the

applicable box with an "X")

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 xiii

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 entity (please add additional rows as necessary) xiv

X

Name xv

% 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

Heirs Alliance Limited

60% in Heirs Holdings

60%

Tony Elumelu

30% in Heirs Holdings

30%

Awele Elumelu

10% in Heirs Holdings

10%

10. In case of proxy voting, please identify:

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 xvi

Place of completion

Lagos, Nigeria

Date of completion

31/12/2025