Pennon Group Plc Organizational Structure & Org Chart

Pennon reports water, non-household retail and other segments, and says South West Water's funding is ring-fenced from the rest of the group.

Pennon Group Plc organizational chart

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Pennon Group Plc's reporting structure as of 2026-03. Drag to pan, scroll to zoom — or open it in QueryChart and edit it as your own.

Industry: Regulated water and wastewater
Ownership: Public
Structure as of: 2026-03
Structure last reviewed: 2026-11-04

About the company

Pennon Group Plc is listed on the London Stock Exchange and calls itself an environmental infrastructure group focused on the UK water sector. Its regulated companies are South West Water Limited, which also serves parts of Bristol, and Sutton and East Surrey Water plc, which trades as SES Water and was acquired on 10 January 2024.

Its annual report for the year to 31 March 2026 reports three segments: Water, Non-household retail and Other. Viridor, the waste business, was sold to funds advised by KKR, completing on 8 July 2020, which left Pennon focused on UK water. Pennon also holds 30 percent of Water 2 Business, a retail joint venture with Wessex Water.

Ring-fenced water companies beside retail and power

Solid lines follow the segment note in the annual report. Water holds the two licensed companies: South West Water, with Bristol reported as a separate regional network inside it, and SES Water, which keeps its own group structure and regulatory licence. Non-household retail holds the two business retailers. Other holds Pennon Power, the renewable energy business, with the parent company and smaller ancillary items.

The report says South West Water's funding is ring-fenced for regulatory purposes: money it raises is not available to other parts of the group, whose funding comes mainly from Pennon Group Plc. Pennon Water Services is 80 percent owned, with South Staffordshire holding the rest. The dotted line marks the 30 percent Water 2 Business stake, accounted for under the equity method.

How this structure supports the business

A list of brands would put South West Water, Bristol Water, SES Water and the retailers side by side. The chart shows which are licensed water companies, which are retailers and which sit in the Other segment, and where a minority partner holds part of a retailer. It also shows the Bristol network sitting inside South West Water, not beside it.

Interesting facts

Viridor was sold to funds advised by KKR, with the sale completing on 8 July 2020 for net proceeds of £3.7 billion.
SES Water was acquired on 10 January 2024 and keeps its own regulatory licence and group structure.
Water segment revenue was £1,022.0 million in 2025/26; group revenue was £1,291.4 million after £137.9 million of intra-group eliminations.

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