Holding(s) in Company

Pennon Group PLC

23 October 2026

 

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

3. Details of person subject to the notification obligation

Name

JPMorgan Chase & Co.

City of registered office (if applicable)

Country of registered office (if applicable)

US

4. Details of the shareholder

Name	City of registered office	Country of registered office
J.P. Morgan Securities PLC

5. Date on which the threshold was crossed or reached

21-Oct-2026

6. Date on which Issuer notified

23-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	1.593269	3.433151	5.026420	23723778
Position of previous notification (if applicable)	Below minimum threshold	Below minimum threshold	Below minimum threshold

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		7519935		1.593269
Sub Total 8.A	7519935		1.593269%

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
Cash-settled Equity Swap	02/07/2027	02/07/2027	Cash	777	0.000165
Cash-settled Equity Swap	04/10/2027	04/10/2027	Cash	19748	0.004184
Cash-settled Equity Swap	03/08/2027	03/08/2027	Cash	449352	0.095205
Cash-settled Equity Swap	17/09/2027	17/09/2027	Cash	141731	0.030029
Cash-settled Equity Swap	02/11/2027	02/11/2027	Cash	47710	0.010108
Cash-settled Equity Swap	02/12/2027	02/12/2027	Cash	2332990	0.494297
Cash-settled Equity Swap	15/11/2027	15/11/2027	Cash	1518944	0.321823
Cash-settled Equity Swap	13/10/2031	13/10/2031	Cash	226257	0.047938
Cash-settled Equity Swap	03/10/2031	03/10/2031	Cash	437073	0.092604
Cash-settled Equity Swap	02/05/2030	02/05/2030	Cash	839065	0.177775
Cash-settled Equity Swap	10/04/2028	10/04/2028	Cash	669231	0.141792
Cash-settled Equity Swap	03/02/2028	03/02/2028	Cash	692108	0.146639
Cash-settled Equity Swap	16/11/2027	16/11/2027	Cash	1690250	0.358118
Cash-settled Equity Swap	30/03/2027	30/03/2027	Cash	899825	0.190648
Cash-settled Equity Swap	30/04/2027	30/04/2027	Cash	2049	0.000434
Cash-settled Equity Swap	07/07/2027	07/07/2027	Cash	23228	0.004921
Cash-settled Equity Swap	03/11/2026	03/11/2026	Cash	8437	0.001788
Cash-settled Equity Swap	01/11/2027	01/11/2027	Cash	47593	0.010084
Cash-settled Equity Swap	18/11/2027	18/11/2027	Cash	57720	0.012229
Cash-settled Equity Swap	02/09/2027	02/09/2027	Cash	438225	0.092848
Cash-settled Equity Swap	30/05/2028	30/05/2028	Cash	22424	0.004751
Cash-settled Equity Swap	30/04/2029	30/04/2029	Cash	114558	0.024272
Cash-settled Equity Swap	02/02/2027	02/02/2027	Cash	339	0.000072
Cash-settled Equity Swap	16/03/2033	16/03/2033	Cash	20185	0.004277
Cash-settled Equity Swap	03/06/2033	03/06/2033	Cash	11055	0.002342
Cash-settled Equity Swap	02/06/2033	02/06/2033	Cash	9590	0.002032
Cash-settled Equity Swap	05/11/2031	05/11/2031	Cash	16364	0.003467
Cash-settled Equity Swap	15/04/2032	15/04/2032	Cash	10890	0.002307
Cash-settled Equity Swap	08/03/2032	08/03/2032	Cash	60368	0.012790
Cash-settled Equity Swap	02/03/2033	02/03/2033	Cash	8390	0.001778
Cash-settled Equity Swap	07/07/2033	07/07/2033	Cash	8830	0.001871
Cash-settled Equity Swap	17/03/2032	17/03/2032	Cash	7671	0.001625
Cash-settled Equity Swap	28/03/2033	28/03/2033	Cash	16151	0.003422
Cash-settled Equity Swap	07/10/2033	07/10/2033	Cash	14501	0.003072
Cash-settled Equity Swap	09/05/2033	09/05/2033	Cash	36640	0.007763
Cash-settled Equity Swap	11/11/2031	11/11/2031	Cash	6906	0.001463
Cash-settled Equity Swap	13/07/2033	13/07/2033	Cash	28543	0.006047
Cash-settled Equity Swap	10/02/2033	10/02/2033	Cash	22173	0.004698
Cash-settled Equity Swap	19/09/2033	19/09/2033	Cash	19955	0.004228
Cash-settled Equity Swap	13/06/2033	13/06/2033	Cash	39276	0.008322
Cash-settled Equity Swap	04/03/2031	04/03/2031	Cash	476542	0.100966
Cash-settled Equity Swap	15/06/2033	15/06/2033	Cash	22997	0.004872
Cash-settled Equity Swap	13/04/2033	13/04/2033	Cash	6865	0.001455
Cash-settled Equity Swap	28/02/2033	28/02/2033	Cash	19696	0.004173
Cash-settled Equity Swap	01/07/2033	01/07/2033	Cash	23984	0.005082
Cash-settled Equity Swap	05/08/2033	05/08/2033	Cash	19173	0.004062
Cash-settled Equity Swap	21/09/2033	21/09/2033	Cash	15778	0.003343
Cash-settled Equity Swap	03/03/2033	03/03/2033	Cash	8162	0.001729
Cash-settled Equity Swap	05/10/2033	05/10/2033	Cash	11803	0.002501
Cash-settled Equity Swap	29/06/2033	29/06/2033	Cash	14527	0.003078
Cash-settled Equity Swap	08/08/2033	08/08/2033	Cash	29911	0.006337
Cash-settled Equity Swap	06/06/2033	06/06/2033	Cash	21403	0.004535
Cash-settled Equity Swap	27/07/2033	27/07/2033	Cash	18710	0.003964
Cash-settled Equity Swap	07/11/2031	07/11/2031	Cash	15391	0.003261
Cash-settled Equity Swap	11/07/2033	11/07/2033	Cash	33211	0.007037
Cash-settled Equity Swap	24/02/2033	24/02/2033	Cash	4231	0.000896
Cash-settled Equity Swap	23/05/2033	23/05/2033	Cash	49954	0.010584
Cash-settled Equity Swap	18/11/2031	18/11/2031	Cash	12225	0.002590
Cash-settled Equity Swap	12/05/2033	12/05/2033	Cash	12620	0.002674
Cash-settled Equity Swap	14/04/2033	14/04/2033	Cash	8030	0.001701
Cash-settled Equity Swap	17/11/2027	17/11/2027	Cash	807808	0.171152
Cash-settled Equity Swap	11/02/2027	11/02/2027	Cash	288209	0.061064
Cash-settled Equity Swap	26/10/2026	26/10/2026	Cash	233723	0.049520
Cash-settled Equity Swap	03/07/2031	03/07/2031	Cash	24989	0.005294
Cash-settled Equity Swap	04/05/2027	04/05/2027	Cash	271252	0.057471
Cash-settled Equity Swap	02/04/2027	02/04/2027	Cash	4116	0.000872
Cash-settled Equity Swap	02/06/2027	02/06/2027	Cash	154350	0.032703
Cash-settled Equity Swap	19/01/2032	19/01/2032	Cash	5092	0.001079
Cash-settled Equity Swap	24/11/2031	24/11/2031	Cash	20011	0.004240
Cash-settled Equity Swap	29/07/2033	29/07/2033	Cash	43611	0.009240
Cash-settled Equity Swap	04/11/2031	04/11/2031	Cash	54828	0.011617
Cash-settled Equity Swap	21/02/2033	21/02/2033	Cash	17442	0.003695
Cash-settled Equity Swap	10/09/2031	10/09/2031	Cash	12894	0.002732
Cash-settled Equity Swap	31/05/2033	31/05/2033	Cash	33278	0.007051
Cash-settled Equity Swap	10/02/2027	10/02/2027	Cash	9790	0.002074
Cash-settled Equity Swap	02/04/2031	02/04/2031	Cash	63	0.000013
Cash-settled Equity Swap	12/05/2027	12/05/2027	Cash	32230	0.006829
Cash-settled Equity Swap	24/11/2027	24/11/2027	Cash	775534	0.164315
Cash-settled Equity Swap	18/03/2033	18/03/2033	Cash	15765	0.003340
Cash-settled Equity Swap	20/06/2033	20/06/2033	Cash	39667	0.008404
Cash-settled Equity Swap	14/03/2033	14/03/2033	Cash	32866	0.006963
Cash-settled Equity Swap	11/03/2033	11/03/2033	Cash	14990	0.003176
Cash-settled Equity Swap	04/03/2033	04/03/2033	Cash	10979	0.002326
Cash-settled Equity Swap	09/02/2033	09/02/2033	Cash	25112	0.005321
Cash-settled Equity Swap	26/09/2033	26/09/2033	Cash	17714	0.003753
Cash-settled Equity Swap	16/09/2033	16/09/2033	Cash	9374	0.001986
Cash-settled Equity Swap	14/11/2031	14/11/2031	Cash	17916	0.003796
Cash-settled Equity Swap	15/03/2032	15/03/2032	Cash	23191	0.004914
Cash-settled Equity Swap	10/10/2033	10/10/2033	Cash	75097	0.015911
Cash-settled Equity Swap	15/10/2027	15/10/2027	Cash	9560	0.002026
Cash-settled Equity Swap	04/04/2033	04/04/2033	Cash	13575	0.002876
Cash-settled Equity Swap	16/05/2033	16/05/2033	Cash	28583	0.006056
Cash-settled Equity Swap	10/11/2031	10/11/2031	Cash	13845	0.002933
Cash-settled Equity Swap	31/10/2031	31/10/2031	Cash	15397	0.003262
Cash-settled Equity Swap	23/02/2033	23/02/2033	Cash	10356	0.002194
Cash-settled Equity Swap	07/03/2033	07/03/2033	Cash	41240	0.008738
Cash-settled Equity Swap	25/07/2033	25/07/2033	Cash	34562	0.007323
Cash-settled Equity Swap	01/06/2033	01/06/2033	Cash	11895	0.002520
Cash-settled Equity Swap	20/01/2032	20/01/2032	Cash	4811	0.001019
Cash-settled Equity Swap	17/11/2031	17/11/2031	Cash	18815	0.003986
Cash-settled Equity Swap	16/04/2032	16/04/2032	Cash	34500	0.007310
Cash-settled Equity Swap	30/10/2031	30/10/2031	Cash	8567	0.001815
Cash-settled Equity Swap	06/11/2031	06/11/2031	Cash	5055	0.001071
Cash-settled Equity Swap	03/11/2031	03/11/2031	Cash	9708	0.002057
Cash-settled Equity Swap	10/11/2027	10/11/2027	Cash	38492	0.008155
Cash-settled Equity Swap	07/02/2033	07/02/2033	Cash	42104	0.008921
Cash-settled Equity Swap	22/09/2033	22/09/2033	Cash	17380	0.003682
Cash-settled Equity Swap	16/06/2033	16/06/2033	Cash	14339	0.003038
Cash-settled Equity Swap	17/02/2033	17/02/2033	Cash	16538	0.003504
Cash-settled Equity Swap	24/03/2033	24/03/2033	Cash	33280	0.007051
Cash-settled Equity Swap	22/07/2033	22/07/2033	Cash	15304	0.003243
Cash-settled Equity Swap	09/06/2033	09/06/2033	Cash	13712	0.002905
Cash-settled Equity Swap	10/03/2033	10/03/2033	Cash	8162	0.001729
Cash-settled Equity Swap	04/08/2033	04/08/2033	Cash	22583	0.004785
Cash-settled Equity Swap	12/09/2033	12/09/2033	Cash	11035	0.002338
Cash-settled Equity Swap	20/11/2031	20/11/2031	Cash	18254	0.003868
Cash-settled Equity Swap	27/06/2033	27/06/2033	Cash	48551	0.010287
Cash-settled Equity Swap	25/03/2033	25/03/2033	Cash	41307	0.008752
Cash-settled Equity Swap	23/03/2033	23/03/2033	Cash	20810	0.004409
Cash-settled Equity Swap	03/08/2033	03/08/2033	Cash	29559	0.006263
Cash-settled Equity Swap	22/06/2033	22/06/2033	Cash	18795	0.003982
Cash-settled Equity Swap	12/03/2032	12/03/2032	Cash	26814	0.005681
Cash-settled Equity Swap	29/10/2031	29/10/2031	Cash	11485	0.002433
Cash-settled Equity Swap	05/09/2031	05/09/2031	Cash	7465	0.001582
Cash-settled Equity Swap	21/11/2031	21/11/2031	Cash	10361	0.002195
Cash-settled Equity Swap	13/05/2033	13/05/2033	Cash	13250	0.002807
Cash-settled Equity Swap	19/05/2027	19/05/2027	Cash	2941	0.000623
Cash-settled Equity Swap	15/07/2033	15/07/2033	Cash	16292	0.003452
Cash-settled Equity Swap	16/02/2033	16/02/2033	Cash	11869	0.002515
Cash-settled Equity Swap	28/07/2033	28/07/2033	Cash	14545	0.003082
Cash-settled Equity Swap	23/09/2033	23/09/2033	Cash	27735	0.005876
Cash-settled Equity Swap	02/11/2029	02/11/2029	Cash	4782	0.001013
Cash-settled Equity Swap	14/12/2027	14/12/2027	Cash	12330	0.002612
Cash-settled Equity Swap	06/07/2033	06/07/2033	Cash	11134	0.002359
Cash-settled Equity Swap	25/02/2033	25/02/2033	Cash	9782	0.002073
Cash-settled Equity Swap	26/11/2031	26/11/2031	Cash	6496	0.001376
Cash-settled Equity Swap	12/11/2031	12/11/2031	Cash	8454	0.001791
Cash-settled Equity Swap	11/03/2032	11/03/2032	Cash	36829	0.007803
Cash-settled Equity Swap	30/06/2033	30/06/2033	Cash	15671	0.003320
Cash-settled Equity Swap	21/03/2033	21/03/2033	Cash	28376	0.006012
Cash-settled Equity Swap	13/10/2033	13/10/2033	Cash	38756	0.008211
Cash-settled Equity Swap	11/04/2033	11/04/2033	Cash	18150	0.003845
Cash-settled Equity Swap	18/05/2033	18/05/2033	Cash	7205	0.001527
Cash-settled Equity Swap	14/02/2033	14/02/2033	Cash	28314	0.005999
Cash-settled Equity Swap	14/07/2033	14/07/2033	Cash	11741	0.002488
Cash-settled Equity Swap	29/09/2033	29/09/2033	Cash	5915	0.001253
Cash-settled Equity Swap	14/04/2032	14/04/2032	Cash	18065	0.003827
Cash-settled Equity Swap	19/11/2031	19/11/2031	Cash	9549	0.002023
Cash-settled Equity Swap	25/11/2031	25/11/2031	Cash	13431	0.002846
Cash-settled Equity Swap	08/09/2031	08/09/2031	Cash	17776	0.003766
Cash-settled Equity Swap	15/01/2032	15/01/2032	Cash	15822	0.003352
Cash-settled Equity Swap	04/02/2033	04/02/2033	Cash	13060	0.002767
Cash-settled Equity Swap	18/07/2033	18/07/2033	Cash	31467	0.006667
Cash-settled Equity Swap	21/07/2033	21/07/2033	Cash	16011	0.003392
Cash-settled Equity Swap	18/03/2032	18/03/2032	Cash	9332	0.001977
Cash-settled Equity Swap	26/05/2033	26/05/2033	Cash	19425	0.004116
Cash-settled Equity Swap	23/06/2033	23/06/2033	Cash	18761	0.003975
Cash-settled Equity Swap	27/05/2033	27/05/2033	Cash	13212	0.002799
Cash-settled Equity Swap	24/09/2031	24/09/2031	Cash	3132	0.000664
Cash-settled Equity Swap	07/04/2033	07/04/2033	Cash	16101	0.003411
Cash-settled Equity Swap	21/10/2027	21/10/2027	Cash	7436	0.001575
Cash-settled Equity Swap	13/11/2031	13/11/2031	Cash	9671	0.002049
Sub Total 8.B2				16203843	3.433151%

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
JPMorgan Chase & Co.	J.P. Morgan Securities plc		3.433151	4.962093%
JPMorgan Chase & Co.	J.P. Morgan SE
JPMorgan Chase & Co.	J.P. Morgan Securities LLC

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

Chain of controlled undertakings:

JPMorgan Chase & Co.
JPMorgan Chase Bank, National Association (100%)
J.P. Morgan International Finance Limited (100%)
J.P. Morgan Capital Holdings Limited (100%)
J.P. Morgan Securities PLC (100%)

JPMorgan Chase & Co.
JPMorgan Chase Holdings LLC (100%)
J.P. Morgan Broker-Dealer Holdings Inc. (100%)
J.P. Morgan Securities LLC (100%)

JPMorgan Chase & Co.
JPMorgan Chase Bank, National Association (100%)
J.P. Morgan International Finance Limited (100%)
J.P. Morgan SE (100%)

12. Date of Completion

23-Oct-2026

13. Place Of Completion

London

 

END