Pennon Group PLCLSE: PNN

Pennon Group: Holding(s) in Company

· Issued by Pennon Group PLC via RNS

TR-1: Standard form for notification of major holdings

1. Issuer Details

ISIN

GB00BNNTLN49

Issuer Name

PENNON GROUP PLC

UK or Non-UK Issuer

UK

2. Reason for Notification

An acquisition or disposal of voting rights; An acquisition or disposal of financial instruments

3. Details of person subject to the notification obligation

Name

Bank of America Corporation

City of registered office (if applicable)

Wilmington

Country of registered office (if applicable)

United States

4. Details of the shareholder

Name

City of registered office

Country of registered office

Merrill Lynch International

London

United Kingdom

5. Date on which the threshold was crossed or reached

13-Oct-2026

6. Date on which Issuer notified

14-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

3.098849

2.157330

5.256179

24808190

Position of previous notification (if applicable)

0.010795

0.236706

0.247501

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)

GB00BNNTLN49

14618625

3.097288

US7083262029

7368

0.001561

Sub Total 8.A

14625993

3.098849%

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

Right to Recall

n/a

n/a

3580258

0.758559

Sub Total 8.B1

3580258

0.758559%

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

Swaps

13/11/2026

N/A

Cash

671

0.000142

Swaps

18/11/2026

N/A

Cash

500000

0.105936

Swaps

11/12/2026

N/A

Cash

101278

0.021458

Swaps

15/01/2027

N/A

Cash

1565

0.000332

Swaps

16/04/2027

N/A

Cash

165018

0.034963

Swaps

26/04/2027

N/A

Cash

51506

0.010913

Swaps

17/05/2027

N/A

Cash

42517

0.009008

Swaps

25/06/2027

N/A

Cash

54288

0.011502

Swaps

09/09/2027

N/A

Cash

26649

0.005646

Swaps

13/09/2027

N/A

Cash

117148

0.024821

Swaps

15/09/2027

N/A

Cash

151513

0.032101

Swaps

15/10/2027

N/A

Cash

2196730

0.465427

Swaps

29/10/2027

N/A

Cash

53192

0.011270

Swaps

01/11/2027

N/A

Cash

303889

0.064386

Swaps

08/11/2027

N/A

Cash

1250000

0.264841

Swaps

30/11/2027

N/A

Cash

1000000

0.211873

Swaps

15/02/2028

N/A

Cash

135614

0.028733

Swaps

28/02/2028

N/A

Cash

115858

0.024547

Swaps

31/03/2028

N/A

Cash

102166

0.021646

Option

23/04/2032

N/A

Cash

30632

0.006490

Option

15/01/2027

N/A

Cash

84399

0.017882

Option

28/06/2027

N/A

Cash

7234

0.001533

Option

30/05/2028

N/A

Cash

64997

0.013771

Option

04/02/2031

N/A

Cash

45075

0.009550

Sub Total 8.B2

6601939

1.398771%

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

Bank of America Corporation

Bank of America, National Association

Bank of America Corporation

BofA Securities, Inc.

Bank of America Corporation

Merrill Lynch International

3.084274

4.780269%

Bank of America Corporation

U.S. Trust Company of Delaware

Bank of America Corporation

BofA Securities Europe SA

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

If date does not apply, explain below

11. Additional Information

12. Date of Completion

14-Oct-2026

13. Place Of Completion

London, United Kingdom

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