The Accounts Companies House intelligence PSC snapshot 2026-05-20
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UK-visible control · private-equity firm

ECI Partners

UK companies whose Companies House control chain resolves to ECI Partners, via 3 matched control vehicles. Two views: every company where the firm is a significant-control PSC, and the narrower set it majority-controls.

ECI Partners is a UK-based growth-focused private equity firm, based in London. It was established in 1976 and invests in mid-market businesses, typically backing growth and buyout transactions in sectors including technology, data, financial services and healthcare; it has raised funds including a £700m fund reported in 2025.

External profile · [1] [2] [3] [4]

Majority control

≥50% shares/votes or board control

£305m

turnover · full accounts of controlled companies

Companies
132
Employees
1,596
PBT
£-56m

All disclosed control

incl. minority (≥25%) PSC stakes

£375m

turnover · 156 companies

Employees
2,664
With accounts
14 (9%)

Control structure

Majority control · top platforms by turnover · 132 companies controlled in total

Platforms are the firm's accounts-filing holdings; figures are their (consolidated) turnover. Subsidiaries beneath them are already inside that total — shown for structure, not added again.

Largest UK holdings (2026)

Majority control · by turnover · 11 have filed accounts

Company PSC control Turnover PBT Emp.
COSMOS TOPCO LIMITED controlled via 6 hops · every link ≥75% 75–100% £89m £-44m 251
HAMSARD 3669 LIMITED controlled via 2 hops · every link ≥75% 75–100% £75m £-33m 380
THE APPOINTMENT GROUP LIMITED controlled via 8 hops · every link ≥75% 75–100% £59m £9m 484
AVANTIA INSURANCE LIMITED controlled via 7 hops · every link ≥75% 75–100% £47m £16m 122
CROUD INC LTD controlled via 6 hops · every link ≥75% 75–100% £26m £-8m 293
ALLIANTIST LIMITED controlled via 6 hops · every link ≥75% 75–100% £10m £560,752 66
CMAP GROUP LIMITED controlled via 7 hops · every link ≥75% 75–100% — £4m 0

How this is built — and its limits

  • Control, not ownership. PSC filings disclose significant control (≥25% shares/votes, board rights, significant influence) — not economic ownership. We never assert a cap table.
  • "PSC control" is a band, not an exact stake. Companies House discloses control only in ranges (25–50%, 50–75%, 75–100%), and we show the stronger of the share or voting band on the holding's nearest disclosed edge — the firm's own stake for directly-held companies, the immediate intermediate's for those held through a chain. A band below 50% (or a blank —) here means control rests on board-appointment rights or significant influence rather than a majority shareholding — common in PE structures.
  • Every holding is chain-verified. The line under each company ("controlled via N hops · every link ≥X%") is the shortest PSC control chain we found from ECI Partners's vehicles down to it — each hop a real Companies House disclosure. Where a company is also controlled by another tracked firm, that's flagged inline.
  • Full accounts, not apportioned. A controlled company's figures are counted in full, not scaled by stake. A jointly-controlled asset counts fully under each controller.
  • No double-counting. Where a consolidated parent and its subsidiaries both file, only the topmost is counted.
  • Coverage is a floor. Only 11 of 132 majority-controlled companies file detailed accounts in our enriched set, so totals understate the true portfolio.
  • UK-visible only. Chains that exit to Jersey, Guernsey or other registries terminate there — we can't follow beyond the UK.