Holding(s) in Company
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
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