PORTSMOUTH WATER LIMITED
PORTSMOUTH WATER LIMITED is a private limited company registered in England and Wales under company number 02536455. It was incorporated on 31 August 1990 and is recorded as active on the Companies House register as of 22 September 2026. The company’s registered office is at Brockhampton Springs, West Street, Havant, England, PO9 1LG, and Companies House classifies its principal activity under SIC code 36000, water collection, treatment and supply.
Portsmouth Water Limited operates as a water-only company regulated by Ofwat, the economic regulator for the water industry in England and Wales, supplying drinking water to households and businesses across South East Hampshire and parts of West Sussex, including areas around Portsmouth, Havant, Fareham, Gosport, Chichester and Bognor Regis. Since March 2018 the company has been owned by infrastructure funds managed by Ancala Partners, following Ofwat’s approval of a change of control; since that acquisition, Ancala has funded development of the Havant Thicket reservoir, a new groundwater storage reservoir intended to reduce abstraction from sensitive chalk streams. Portsmouth Water Limited’s shares are not admitted to trading on any stock exchange, and no independently verified company-level turnover or employee figures specific to this legal entity were identified for this profile.
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- Corporate linkage & group structures
- Digitized company financials
- Firmographics — websites, social profiles, revenue and employee estimates
Shareholders
2
Shareholders of PORTSMOUTH WATER LIMITED
Company shareholder register data associated with this profile, verified 21 September 2026, records all of Portsmouth Water Limited’s disclosed share capital as held by Portsmouth Water Holdings Limited (Companies House company number 04373276): 806,509,162 Ordinary A £1.00 shares (99.47% of total share capital) and 4,265,197 Ordinary £1.00 shares (0.53%), together 100% of disclosed capital. Companies House’s persons-with-significant-control register, reviewed 22 September 2026, confirms Portsmouth Water Holdings Limited as an active PSC, notified 6 April 2016, holding 75% or more of shares and voting rights and the right to appoint or remove directors. The same register separately names Mr Christopher Loughlin, a serving director of Portsmouth Water Limited, as an individual PSC with “significant influence or control,” notified 1 April 2021; this is a non-shareholding form of control and Companies House does not report an ownership percentage for it. Five individuals notified as PSCs on 6 April 2016 for influence over the trustees of a trust ceased that status on 16 March 2018, coinciding with Ancala Partners’ 2018 acquisition of the group.
Ultimate beneficial ownership
No natural-person UBO with a calculable effective ownership percentage is disclosed for Portsmouth Water Limited. Portsmouth Water Holdings Limited holds 100% of the disclosed share capital, and Companies House’s PSC filings trace further corporate control up a verified seven-tier holding chain (see Group structure) linked to the infrastructure investor Ancala Partners; no filing identifies an individual with a calculable direct or indirect majority beneficial interest.
Data availability
Classification: Full. Companies House publishes both the shareholder register and the persons-with-significant-control register for Portsmouth Water Limited, and the two sources are consistent with one another.
Sources
- Companies House – Persons with significant control – Portsmouth Water Limited – https://find-and-update.company-information.service.gov.uk/company/02536455/persons-with-significant-control – retrieved 22 September 2026
- Zavia.ai shareholder register data – verified 21 September 2026
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| PORTSMOUTH WATER HOLDINGS LTD | 99.5% | Companies House | |
| PORTSMOUTH WATER HOLDINGS LTD | 0.5% | Companies House |
Officers
5
Directors and officers of PORTSMOUTH WATER LIMITED
Companies House records more than thirty officer appointments for Portsmouth Water Limited since its 1990 incorporation, of which seven remain active as of 22 September 2026. The current officers are Sharon Helen Darcy (Director, appointed 16 October 2023), Christopher Deacon (Director, appointed 1 May 2020), Christopher Loughlin (Director, appointed 1 April 2021), John Christopher Milner (Director, appointed 1 October 2021), Dr Lara Dimitrova Stoimenova (Director, appointed 17 January 2022), Colin Robert Taylor (Director, appointed 1 November 2018) and Hayley Elizabeth Hewson (Company Secretary, appointed 26 September 2025). All six current directors are recorded with British nationality; five are recorded as resident in England and Dr Stoimenova is recorded as resident in the United Kingdom. This overview reflects live Companies House officer data reviewed 22 September 2026, which also records a long history of earlier director and secretary resignations dating back to the 1990s; occupation is not separately disclosed for most appointments.
Recent officer changes
- Hayley Elizabeth Hewson appointed Company Secretary, 26 September 2025 (source: Companies House).
- Sharon Helen Darcy appointed Director, 16 October 2023 (source: Companies House).
- Dr Lara Dimitrova Stoimenova appointed Director, 17 January 2022 (source: Companies House).
Data availability
Classification: Full. Companies House publishes current and historical officer appointment and resignation dates together with nationality and country of residence for Portsmouth Water Limited’s directors.
Sources
- Companies House – Officers – Portsmouth Water Limited – https://find-and-update.company-information.service.gov.uk/company/02536455/officers – retrieved 22 September 2026
Group Structure
Group structure of PORTSMOUTH WATER LIMITED
Portsmouth Water Limited is not an independent company. Companies House’s persons-with-significant-control register names Portsmouth Water Holdings Limited (04373276) as its immediate parent, notified 6 April 2016, and company shareholder register data confirms Portsmouth Water Holdings Limited holds 100% of Portsmouth Water Limited’s disclosed share capital. Each further tier was independently confirmed via that entity’s own live PSC filing on 22 September 2026: Portsmouth Water Holdings Limited is controlled by Brockhampton Holdings Limited (02570616), which is controlled by South Downs Limited (04251707), which is controlled by South Downs Capital Limited (04288161), which is controlled by Ancala Fornia Limited (10421753), which is controlled by Ancala Fornia Midco Limited (10461865), which is controlled by Ancala Fornia Holdco Limited (10461654). Ancala Fornia Holdco Limited’s own PSC register currently names Ancala Fornia Topco Pte Ltd, a Singapore-registered private limited company (registration 202302960z), notified 23 January 2023, as its controlling entity, superseding two earlier UK-registered Ancala Partners fund vehicles (Ancala Essential Growth Infrastructure GP LLP and Ancala Partners LLP) that had previously held this position. Note: corporate-linkage data associated with this profile had additionally listed a Hong Kong-registered entity, Southern Region Water Holding Limited, above Ancala Fornia Holdco Limited; this was not confirmed by Ancala Fornia Holdco Limited’s live Companies House PSC filing reviewed for this update and has therefore been omitted as unverified. Publicly reported information confirms Portsmouth Water has been owned by infrastructure funds managed by Ancala Partners since Ofwat approved a change of control in March 2018. No subsidiaries of Portsmouth Water Limited were identified.
Verified corporate relationships
| Entity | Country | Registration number | Relationship | Ownership | Status | Information date |
|---|---|---|---|---|---|---|
| Portsmouth Water Holdings Limited | GB | 04373276 | Immediate parent | 100% of share capital | Active | 21–22 Sep 2026 |
| Brockhampton Holdings Limited | GB | 02570616 | Indirect parent | 75%+ shares/voting | Active | 22 Sep 2026 |
| South Downs Limited | GB | 04251707 | Indirect parent | 75%+ shares/voting | Active | 22 Sep 2026 |
| South Downs Capital Limited | GB | 04288161 | Indirect parent | 75%+ shares/voting | Active | 22 Sep 2026 |
| Ancala Fornia Limited | GB | 10421753 | Indirect parent | 75%+ shares/voting | Active | 22 Sep 2026 |
| Ancala Fornia Midco Limited | GB | 10461865 | Indirect parent | 75%+ shares/voting | Active | 22 Sep 2026 |
| Ancala Fornia Holdco Limited | GB | 10461654 | Indirect parent | 75%+ shares/voting | Active | 22 Sep 2026 |
| Ancala Fornia Topco Pte Ltd | SG | 202302960z | Ultimate identifiable parent | 75%+ shares | Active | 22 Sep 2026 |
Recent structural changes
- Ancala Fornia Topco Pte Ltd (Singapore) registered as controlling entity of Ancala Fornia Holdco Limited, 23 January 2023, superseding an Ancala Partners LLP-linked fund vehicle (source: Companies House PSC filing).
- Change of ultimate ownership of the Portsmouth Water group to Ancala Partners-managed infrastructure funds, completed March 2018, following Ofwat approval (source: Ancala Partners; Companies House PSC filing history).
Data availability
Classification: Full for the UK-registered holding chain. All seven UK intermediate holding companies and the Singapore-registered top entity were independently confirmed via each entity’s own live Companies House PSC filing on 22 September 2026; ownership above the Singapore entity is outside the UK register and was not verified in this review.
Sources
- Companies House PSC filings for company numbers 02536455, 04373276, 02570616, 04251707, 04288161, 10421753, 10461865 and 10461654 – retrieved 22 September 2026
- Ancala Partners – Portfolio – Portsmouth Water – https://ancala.com/portfolio/portsmouth-water/ – retrieved 22 September 2026
Southern Region Water Holding Limited
Hong Kong
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Frequently Asked Questions
What does PORTSMOUTH WATER LIMITED do?
PORTSMOUTH WATER LIMITED (company number 02536455) is a private limited company registered in England and Wales, incorporated 31 August 1990 and registered at Brockhampton Springs, West Street, Havant, PO9 1LG; Companies House classifies it under SIC code 36000, water collection, treatment and supply, and it operates as an Ofwat-regulated water-only company supplying South East Hampshire and parts of West Sussex.
Who owns PORTSMOUTH WATER LIMITED?
Company shareholder register data verified 21 September 2026 shows Portsmouth Water Holdings Limited (04373276) holding 100% of Portsmouth Water Limited's disclosed share capital across two share classes, confirmed by an active persons-with-significant-control entry notified 6 April 2016.
Who is PORTSMOUTH WATER LIMITED's UBO (Ultimate Beneficial Owner)?
No natural-person UBO with a calculable effective ownership percentage is disclosed; Companies House separately names director Christopher Loughlin as an individual PSC with non-shareholding 'significant influence or control', notified 1 April 2021.
What is PORTSMOUTH WATER LIMITED's company registration number?
PORTSMOUTH WATER LIMITED's registration number is 02536455, filed with Companies House in United Kingdom. Its current status on the register is active.
Is PORTSMOUTH WATER LIMITED still an active company?
PORTSMOUTH WATER LIMITED's status on Companies House is listed as active.
When was PORTSMOUTH WATER LIMITED incorporated?
PORTSMOUTH WATER LIMITED was incorporated on 31 August 1990, according to Companies House.
What is PORTSMOUTH WATER LIMITED's registered address?
The registered address on file for PORTSMOUTH WATER LIMITED is Havant, United Kingdom.
What legal structure is PORTSMOUTH WATER LIMITED registered as?
PORTSMOUTH WATER LIMITED is registered as a Private limited company (Ltd.) in United Kingdom.
Is PORTSMOUTH WATER LIMITED listed on a stock exchange?
PORTSMOUTH WATER LIMITED's shares are not admitted to trading on any stock exchange; it is a privately held company.
Who are the officers/directors of PORTSMOUTH WATER LIMITED?
Companies House records seven active officers of Portsmouth Water Limited as of 22 September 2026 – six directors (Sharon Helen Darcy, Christopher Deacon, Christopher Loughlin, John Christopher Milner, Dr Lara Dimitrova Stoimenova and Colin Robert Taylor) and company secretary Hayley Elizabeth Hewson – alongside more than thirty historical officer appointments dating back to 1990.
Does PORTSMOUTH WATER LIMITED have a parent company or subsidiaries?
Portsmouth Water Limited is majority owned by Portsmouth Water Holdings Limited, part of a verified seven-tier UK-to-Singapore holding chain (Brockhampton Holdings, South Downs Limited, South Downs Capital, Ancala Fornia Limited, Ancala Fornia Midco and Ancala Fornia Holdco, topped by Ancala Fornia Topco Pte Ltd) linked to infrastructure investor Ancala Partners, which has owned the group since March 2018.
Can Zavia monitor changes to PORTSMOUTH WATER LIMITED's ownership over time?
This profile reflects a point-in-time snapshot from Companies House. Zavia's monitoring API can track changes to PORTSMOUTH WATER LIMITED's registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access PORTSMOUTH WATER LIMITED's data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including United Kingdom, so records like PORTSMOUTH WATER LIMITED's registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from Companies House and was last synced on 22 September 2026.