Who Owns O2?

O2 is owned by VMO2, the 50:50 joint venture between Liberty Global and Telefónica, formed in June 2021. Neither parent controls it alone. The register captured the moment the venture completed in extraordinary detail: on 1 June 2021, five companies were recorded as controlling O2 Holdings and five ceased — all on the same day. Ownership verified 6 September 2026.

Who owns O2 today?

The mobile network operator is TELEFONICA UK LIMITED (01743099), incorporated 28 July 1983. Its person with significant control is O2 Holdings Limited (02604354).

Above that sits the VMO2 structure and, ultimately, two listed parents: Liberty Global, the international cable group, and Telefónica, the Spanish telecoms company. Each holds half.

Telefónica’s name persists on the operating company even though it no longer owns O2 outright — a filing that has not been renamed rather than a statement of current ownership.

Ultimate parent and corporate structure

O2 Holdings Limited’s PSC history is the most compressed sequence found anywhere on this site. Every one of these was notified and ceased on 1 June 2021:

• VMed O2 UK Limited (12580944)
• VMed O2 UK Financing II plc (12804417)
• VMed O2 UK Holdco 1 Limited (12800546)
• VMed O2 UK Holdco 3 Limited (12807077)

The entry that survived is VMed O2 UK Holdco 4 Limited (12809596), notified the same day. And Telefónica O2 Holdings Limited (05310128), which had held control since 2016, ceased on that date too.

Five changes of recorded controller in a single day. Nothing about who owned O2 changed five times on 1 June 2021 — this is a joint venture structure being assembled, with shares passing up a chain of newly built holding companies as the transaction completed. It is the clearest illustration on this site that a flurry of PSC entries can represent a single event.

Major shareholders or controlling persons

There is no controlling person. A 50:50 split means decisions require agreement between Liberty Global and Telefónica, and neither consolidates VMO2 as an ordinary subsidiary.

Above them, Liberty Global is listed in the United States — founded by John Malone, who retains significant voting influence through its share structure — and Telefónica is listed in Spain, where the state investment arm SEPI has built a substantial holding since 2023, alongside Saudi Telecom Company and CriteriaCaixa.

So a Spanish government stake and an American cable group each sit behind half of O2, at one remove.

Official records and evidence

Companies House is unusually informative here, both for the 1 June 2021 cascade and for the chain of VMed O2 companies, all of which are UK-registered and checkable.

The parents’ own disclosures are the authoritative source for the 50:50 terms and for their respective shareholder bases — Liberty Global to the US market, Telefónica to the Spanish. Neither is on the UK register.

Note also that several older O2 (UK) Limited and Telefónica-named companies remain on the register from earlier structures, so name-matching will return entities that no longer trade.

Ownership history and changes

O2 has changed hands three times and been renamed twice:

• 1985 — launched as Cellnet, a joint venture between British Telecom and Securicor.
• 1999 — BT buys out Securicor; the business becomes BT Cellnet.
• 2001 — demerged from BT as mmO2, later O2, and separately listed.
• 2006 — bought by Telefónica for a reported £17.7bn.
• 2015–16 — a proposed sale to Hutchison, owner of Three, is blocked by the European Commission on competition grounds.
• 1 June 2021 — combined with Virgin Media in the 50:50 joint venture.

The blocked Three merger matters: had it completed, O2’s ownership today would be entirely different, and the eventual Virgin Media combination was in part a consequence of that refusal.

Related companies and brands

VMO2 owns O2, Virgin Media, giffgaff and Virgin Mobile, and holds an interest in the nexfibre network venture.

O2 has no connection to BT or EE — BT sold O2 in 2001 and bought EE in 2016, as this site’s EE page records, so the two networks have swapped corporate families. The O2 arena in Greenwich is a sponsorship naming arrangement, not a property O2 owns.