Cobham
UK defence and technology group; divesting Ultra Cyber, its MoD-cleared cryptography subsidiary, to Airbus.
Last refreshed: 30 April 2026 · Appears in 1 active topic
Does Cobham's sale of Ultra Cyber repeat the pattern that made its own Advent acquisition controversial in 2020?
Timeline for Cobham
Divested Ultra Cyber via definitive agreement with Airbus
Cybersecurity: Threats and Defences: Airbus signs for Ultra Cyber from Cobham- Who owns Cobham and why is it selling Ultra Cyber?
- Cobham has been owned by US private equity firm Advent International since 2020. The sale of Ultra Cyber to Airbus is part of a portfolio rationalisation that concentrates Cobham on its core avionics and electronic-warfare businesses.
- Was Cobham's acquisition by Advent International a national security issue?
- The 2020 Advent International acquisition of Cobham attracted UK Government scrutiny under Public Interest Intervention provisions before clearing. It was among the first major UK defence transactions reviewed under the pre-NSIA framework, establishing the precedent that private equity acquisition of a UK defence supplier warranted ministerial review.
- What businesses does Cobham still own after selling Ultra Cyber?
- Cobham retains its core avionics, electronic warfare, and aviation systems businesses. Ultra Cyber is one of several portfolio disposals under Advent ownership as Cobham concentrates on its primary defence-electronics capabilities.
Background
Cobham is a UK-headquartered defence and aerospace technology group founded in 1934 by Alan Cobham, with a portfolio spanning electronic warfare, aviation systems, and communications technology. The company was taken private by US private equity firm Advent International in 2020 in a transaction that attracted UK Government scrutiny under the Public Interest Intervention provisions — one of the first major UK defence acquisitions reviewed under the pre-NSIA intervention framework — before ultimately clearing. Under Advent ownership, Cobham pursued a portfolio rationalisation strategy: concentrating on core avionics and electronic-warfare capabilities while divesting assets outside that focus.
Cobham acquired Ultra Cyber as part of a broader portfolio deal after the Advent takeover. Ultra Cyber is Cobham's most strategically sensitive holding by classification level, carrying UK Government-cleared cryptography and data-security work for MoD programmes. In April 2026 Cobham signed a definitive agreement to sell Ultra Cyber to Airbus, divesting the UK's primary sovereign-cryptography defence-cyber firm to a continental European prime. The UK NSI Act notification and MoD clearance review will determine whether any conditions attach to the disposal.
Cobham's disposal of Ultra Cyber to Airbus follows the same structural pattern that made its own 2020 Advent acquisition controversial: a UK strategic-defence supplier moving outside UK consolidated control. Cobham retains the rest of its defence portfolio; Ultra Cyber is one of several disposals in the current ownership period, consistent with the Advent portfolio playbook of acquiring diversified, identifying non-core assets, and selling to strategic buyers.
The pattern of UK defence assets cycling through private equity into foreign industrial primes is a recurring feature of the UK defence-industrial base. The NSIA was enacted partly in response to the 2020 Cobham-Advent transaction; whether the Act's ministerial intervention powers are now used for the Ultra Cyber disposal will signal the government's appetite to impose sovereignty conditions on defence-cyber, not just physical hardware.