UK companies/SIC 36000/Shareholders/Page 15

Shareholders of UK companies in SIC 36000Page 15 of 18

Water collection, treatment and supply·1,785 companies carry this code·30 shown on this page

SIC 36000 — Water collection, treatment and supply is the Companies House industry code carried by 1,785 UK companies. This page sets out the shareholder register of 30 of them: 29 distinct shareholders holding 30 share-class positions. Every figure comes from the statement of capital and list of members in that company’s most recent CS01 confirmation statement, filed between 2021-04-26 and 2026-06-03. Each company and each shareholder carries a Sophymarine OpenRegistry ID.

Industry code
SIC 36000

On the UK register
1,785

With a shareholder register
523

Companies on this page
30

Distinct shareholders
29

Shareholders that are UK companies
24

STERLING HYDROTECH LIMITED

openregistry-gb-02275897·confirmation statement 2026-06-03·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
STERLING HYDROTECH HOLDINGS LIMITEDopenregistry-gb-12123123	ORDINARY	1	100.00%

WESSEX WATER SERVICES LIMITED

openregistry-gb-02366648·confirmation statement 2024-04-15·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
WESSEX WATER LIMITEDopenregistry-gb-02366633	ORDINARY	2	100.00%

ANGLIAN WATER SERVICES LIMITED

openregistry-gb-02366656·confirmation statement 2026-05-04·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
ANGLIAN WATER SERVICES UK PARENT CO LIMITEDopenregistry-gb-11294507	ORDINARY	32,000,003	100.00%

THAMES WATER UTILITIES LIMITED

openregistry-gb-02366661·confirmation statement 2024-06-19·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
THAMES WATER UTILITIES HOLDINGS LIMITEDopenregistry-gb-06195202	ORDINARY	76,550,000

SOUTH WEST WATER LIMITED

openregistry-gb-02366665·confirmation statement 2025-11-10·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
PENNON GROUP PLCopenregistry-gb-02366640	ORDINARY	625,923,001	100.00%

UNITED UTILITIES WATER LIMITED

openregistry-gb-02366678·confirmation statement 2021-08-15·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
UNITED UTILITIES NORTH WEST LIMITEDopenregistry-gb-04146378	ORDINARY	230,000,000	100.00%

YORKSHIRE WATER SERVICES LIMITED

openregistry-gb-02366682·confirmation statement 2023-09-23·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
YORKSHIRE WATER SERVICES HOLDINGS LIMITEDopenregistry-gb-06815156	ORDINARY	22,000,000

SEVERN TRENT WATER LIMITED

openregistry-gb-02366686·confirmation statement 2024-06-01·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
SEVERN TRENT DRAYCOTE LIMITEDopenregistry-gb-07681784	ORDINARY	851,000,100,000	100.00%

SUTTON AND EAST SURREY WATER SERVICES LIMITED

openregistry-gb-02446416·confirmation statement 2025-04-03·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
THE CHEAM GROUP PLCopenregistry-gb-02563259	ORDINARY	4,601,000	100.00%

NSI INDUSTRIAL O&M SOLUTIONS LTD

openregistry-gb-02528695·confirmation statement 2023-09-13·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
NIJHUIS SAUR INDUSTRIES UK & IRELAND LIMITEDopenregistry-gb-14261668	ORDINARY	1,923,936

AFFINITY WATER LIMITED

openregistry-gb-02546950·confirmation statement 2021-06-10·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
AFFINITY WATER HOLDINGS LIMITEDopenregistry-gb-08350099	ORDINARY	305,057,824

SOUTH EAST WATER LIMITED

openregistry-gb-02679874·confirmation statement 2025-06-12·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
SOUTH EAST WATER (HOLDINGS) LIMITEDopenregistry-gb-04771490	ORDINARY	324,312,354

CIVIL AND ENVIRONMENTAL PROJECT SERVICES LIMITED

openregistry-gb-02765876·confirmation statement 2024-11-19·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
CIVIL & ENVIRONMENTAL LIMITEDopenregistry-gb-04169232	ORDINARY	100	100.00%

YORK UNIVERSITY ENERGY SUPPLY COMPANY LIMITED

openregistry-gb-02825903·confirmation statement 2021-04-26·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
UNIVERSITY OF YORKopenregistry-gb-RC000679	ORDINARY	23,405,000

KENNET WATER LIMITED

openregistry-gb-03130759·confirmation statement 2022-10-06·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
POLLET WATER GROUPopenregistry-h-pollet-water-group-9efa97	ORDINARY	50,000	100.00%

ENVIROGEN WATER TECHNOLOGIES LIMITED

openregistry-gb-03289389·confirmation statement 2021-12-09·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
ENVIROGEN GROUP UK LIMITEDopenregistry-gb-04996871	ORDINARY	100

AQUATECH ENVIRONMENTAL SERVICES LIMITED

openregistry-gb-03835361·confirmation statement 2022-09-02·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
HEXAGONAL HOLDINGS LIMITEDopenregistry-gb-13463566	ORDINARY	100	100.00%

KINETICO UK HOLDINGS LIMITED

openregistry-gb-04135157·confirmation statement 2026-01-03·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
KINETICO INC.openregistry-h-kinetico-inc-d2c1ac	ORDINARY	8,565,000

S M S ENVIRONMENTAL LIMITED

openregistry-gb-04243379·confirmation statement 2023-06-29·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
SANDFORD, HEARN, HARRIS & ASSOCIATES LTDopenregistry-gb-13227190	ORDINARY	21,000	100.00%

SOUTH DOWNS LIMITED

openregistry-gb-04251707·confirmation statement 2023-07-13·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
SOUTH DOWNS CAPITAL LIMITEDopenregistry-gb-04288161	ORDINARY	60,000,004

TRIDENT WATER SOLUTIONS LIMITED

openregistry-gb-04483579·confirmation statement 2023-07-11·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
TRIDENT WATER HOLDINGS LIMITEDopenregistry-gb-09245862	ORDINARY	10	100.00%

JSL WATER SYSTEMS LIMITED

openregistry-gb-04484383·confirmation statement 2025-07-12·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
DEREK JOHN GRIFFITHSopenregistry-h-derek-john-griffiths-3919c9	ORDINARY	100	100.00%

PURESEP TECHNOLOGIES LIMITED

openregistry-gb-04504682·confirmation statement 2025-12-09·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
ENVIROGEN GROUP UK LIMITEDopenregistry-gb-04996871	ORDINARY	30,000

EXCEL WATER LIMITED

openregistry-gb-04531230·confirmation statement 2026-05-02·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
EXCEL WATER HOLDINGS LTDopenregistry-gb-14137850	ORDINARY	150	100.00%

WATER AT WORK LTD

openregistry-gb-04997138·confirmation statement 2022-11-16·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
TANYA ELLEN CORNFORDopenregistry-h-tanya-ellen-cornford-40f696	ORDINARY	1	100.00%

IRRIGONICS LIMITED

openregistry-gb-05070879·confirmation statement 2026-02-23·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
BACTALOGICAL GROUP LTDopenregistry-gb-13163949	ORDINARY 1 GBP	100	100.00%

THE WCD GROUP LIMITED

openregistry-gb-05072220·confirmation statement 2024-03-12·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
THE WCD GROUP HOLDINGS LIMITEDopenregistry-gb-05961387	ORDINARY	1	100.00%

WATER MAXIM LIMITED

openregistry-gb-05200868·confirmation statement 2021-07-22·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
MR GARY PETER BUTTopenregistry-h-mr-gary-peter-butt-304d7e	ORDINARY	100	100.00%

AQUASERV LIMITED

openregistry-gb-05390711·confirmation statement 2026-03-12·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
AQUASERV (HOLDINGS) LIMITEDopenregistry-gb-14154383	ORDINARY	90	100.00%

SUEZ ADVANCED SOLUTIONS UK LIMITED

openregistry-gb-05687775·confirmation statement 2023-01-25·1 shareholder·1 share class

Shareholder	Share class	Shares held	% of class
SUEZ ADVANCED SOLUTIONS HOLDING UK LIMITEDopenregistry-gb-07200499	ORDINARY	27,200,001	100.00%

Each shareholder carries a Sophymarine OpenRegistry ID. Where the shareholder resolves unambiguously to a UK registered company the ID is openregistry-gb- plus its Companies House number, so the same company carries the same ID wherever it appears. Every other shareholder, including individuals, is given openregistry-h- plus the name as filed and a short hash of it.

A name-derived ID keys the name as recorded on the confirmation statement, not a verified individual. Two different people filed under the same name share one ID; one person filed inconsistently across companies receives more than one.

“% of class” is the holding as a proportion of the shares allotted in that class, from the statement of capital in the same filing. It is blank where the filing states no allotment for the class.

Not every UK company has a machine-readable shareholder list. 523 of the 1,785 companies in SIC 36000 do; companies without one are not listed here.

Source: UK Companies House CS01 confirmation statements and the Free Company Data product, parsed by OpenRegistry. Figures are as filed on the date shown against each company and are not restated for later share transfers.