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

27-Oct-2026

6. Date on which Issuer notified

29-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

3.215495

2.157956

5.373451

25361692

Position of previous notification (if applicable)

0.001441

0.256016

0.257457

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

15083339

3.195748

US7083262029

93202

0.019747

Sub Total 8.A

15176541

3.215495%

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 Common Stock

n/a

n/a

2732205

0.578880

Right to Recall Depositary Receipt

n/a

n/a

4800

0.001017

Sub Total 8.B1

2737005

0.579897%

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

984

0.000208

Swaps

11/12/2026

N/A

Cash

148540

0.031472

Swaps

29/01/2027

N/A

Cash

18408

0.003900

Swaps

26/04/2027

N/A

Cash

31810

0.006740

Swaps

30/04/2027

N/A

Cash

126807

0.026867

Swaps

25/06/2027

N/A

Cash

73018

0.015471

Swaps

30/06/2027

N/A

Cash

873

0.000185

Swaps

09/09/2027

N/A

Cash

1117994

0.236872

Swaps

13/09/2027

N/A

Cash

159228

0.033736

Swaps

15/09/2027

N/A

Cash

251905

0.053372

Swaps

15/10/2027

N/A

Cash

2434246

0.515750

Swaps

20/10/2027

N/A

Cash

11207

0.002374

Swaps

29/10/2027

N/A

Cash

51064

0.010819

Swaps

01/11/2027

N/A

Cash

317359

0.067240

Swaps

30/11/2027

N/A

Cash

1427423

0.302432

Swaps

15/02/2028

N/A

Cash

199772

0.042326

Swaps

18/04/2028

N/A

Cash

606440

0.128488

Swaps

24/09/2029

N/A

Cash

238958

0.050629

Option

28/06/2027

N/A

Cash

7265

0.001539

Option

30/05/2028

N/A

Cash

63154

0.013381

Option

15/01/2027

N/A

Cash

85803

0.018179

Option

23/04/2032

N/A

Cash

30804

0.006527

Option

04/02/2031

N/A

Cash

45084

0.009552

Sub Total 8.B2

7448146

1.578059%

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

U.S. Trust Company of Delaware

Bank of America Corporation

Merrill Lynch International

3.050236

4.644140%

Bank of America Corporation

BofA Securities Europe SA

Bank of America Corporation

BofA Securities, Inc.

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

29-Oct-2026

13. Place Of Completion

London, United Kingdom

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