British air defence startup Cambridge Aerospace valued at $3.4B after $300M Series C

Cambridge Aerospace has closed a $300 million Series C funding round at a valuation of $3.4 billion. The air defence company stated the funds will go toward scaling manufacturing and delivering on existing contracts, including work for the British armed forces.

Funding Details

The round was led by DFJ Growth, with support from Lux, Accel, Lakestar, Never Lift, Ora Global, and Elad Gil & Co. It follows a Series B of $200 million at a $1.3 billion valuation in April this year, meaning the company's paper value has risen by more than $2 billion in four months.

Company Overview

Founded in 2024, Cambridge Aerospace employs more than 250 people, two-thirds of them in technical and engineering roles. The company has a presence in Germany, Poland, Norway, Ukraine, and Australia, alongside its British operations.

Leadership team:

• Professor Steven Barrett – Chief Executive
• Chris Sylvan – Chief Commercial Officer (spent over a decade in the Royal Marines before moving into defence technology)
• Junaid Hussain – Has founded several technology companies

Product Portfolio

• Skyhammer – The company's first product, described as a low-cost modular interceptor designed to bring down Shahed-type attack drones
• Starhammer – A higher-speed interceptor for more valuable incoming missiles, due to reach market in 2027
• Looking Glass – A multistatic radar system
• Nightstar – Solid rocket motors

The company says it uses only secure NATO supply chains.

Government Contracts

Since the Series B, Cambridge Aerospace has secured several contracts from the Ministry of Defence, including:

• An award to supply low-cost interceptors to the armed forces, announced by the Defence Secretary at the London Defence Conference
• The Low-Cost Effectors and Autonomous Platforms (LEAP) programme, which followed in July

Key Statements

Professor Steven Barrett said the raise reflected the work of the whole team and that the funds would allow the company to scale manufacturing and delivery "to meet the pace of threats, and the needs of Allied nations".

Randy Glein, founder and managing partner at DFJ Growth, said the company was addressing one of the most pressing challenges of modern warfare, having developed an affordable and accurate counter-drone system. He added that his firm had surveyed the global landscape before concluding that Cambridge had "the best team and technology to build the most advanced and modern air defense infrastructure for Europe and its allies".

Wes Streeting, the Defence Secretary, said the valuation was a vote of confidence in Britain and that Skyhammer was an example of the low-cost interceptor missiles the armed forces need. He added that it was "exactly what our unicorn scheme is designed to create", referring to the government effort to grow British defence start-ups into billion-pound companies.

Market Context

The commercial logic behind low-cost interceptors stems from a cost exchange problem that has become acute since 2022:

• Russian Shahed-type one-way attack drones cost a fraction of the surface-to-air missiles typically used to shoot them down
• Ukrainian and allied forces have repeatedly expended expensive rounds against cheap targets—a trade that cannot be sustained through a long campaign
• The same arithmetic applies to Houthi drone launches against shipping in the Red Sea, where Western warships have used multi-million pound missiles against targets worth a small fraction of that

Several companies on both sides of the Atlantic are now competing to close that gap with cheaper effectors, gun-based solutions, directed energy, and interceptor drones. The British government has pursued the problem through a mix of programmes, including work on the DragonFire laser, a series of counter-drone trials, and the LEAP effort.