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3I Group PLC
3i is an investment company specialising in Private Equity and Infrastructure. We invest in mid-market companies headquartered in Europe and North America. The company’s own description of itself, taken from its website.
Active 52 years old · 539th oldest of 4,506 · incorporated in the 1970s
Registered office
1 KNIGHTSBRIDGE, LONDON, SW1X 7LX
Other PLCs registered in London
Online
Website www.3i.com
News and announcements on their own site
Found by searching for the company name and kept only where the domain matches it. Social accounts are listed only where the company links to them from its own site. Nothing here is supplied by the company to us.
Group structure
It is the immediate parent of 67 entities, including:
- 3I 2023 CO-INVESTMENT LP
- 3I INFRA 2022 WAREHOUSE LP
- 3I NORTH AMERICAN INFRASTRUCTURE FUND A LP
- 3I NORTH AMERICAN INFRASTRUCTURE GP, LLC
- 3I RR COINVEST GP, LLC
- 3I ECW COINVEST GP, LLC
- 3I NORTH AMERICAN INFRASTRUCTURE PARTNERS, LLC
- 3I MOUNTAIN LP
- 3I PE 2022-25 B LP
- 3I NAI HOLDINGS LP
- 3I NAI HOLDINGS GP LIMITED
- 3I PE 2022-25 A LP
Ownership as recorded by GLEIF, the body that issues Legal Entity Identifiers. Unlike a shared registered office, these relationships are filed and validated, so they are evidence of a real corporate link.
Filing history
This company has 1,173 documents on its Companies House record. The most recent accounts were filed on 26/06/2026. Its last confirmation statement or annual return was filed on 01/04/2026.
The most recent filings
This is the list of documents filed, not their contents. A line saying accounts were filed records that they were filed and when; it says nothing about turnover, profit or assets, which are inside the documents themselves and are not published here. Read the filings on the Companies House record.
Who runs it
The register lists 10 current officers and 41 who have resigned.
Who controls it
The register shows no current person or entity with significant control for this company.
Charges
A charge is security a company gives a lender over its assets. This company has 1 registered charge, of which 0 are not yet recorded as satisfied.
The Governor and Company of the Bank of Scotland(The "Security Trustee") Fully satisfied, created 10/08/2001
Officers, controllers and charges are as recorded on the Companies House register on 13/10/2026, and the register changes daily. Appearing here is not an allegation about anyone. Read the current record on the Companies House record.
What it does
This page is compiled from the public register. Companies House does not verify the information filed with it, so treat everything here as what the company reported rather than as established fact. For filings, officers and charges, see the official Companies House record.
Also at SW1X 7LX
A shared registered office is not evidence of a relationship. Formation agents and genuine groups look identical on the register.
On the register
- 539th oldest of 4,506 PLCs
- One of the 1970s cohort
- Not in liquidation or facing strike off
There are 4,506 PLCs in Britain, under a tenth of one per cent of the register. The whole count.