Cambridge Aerospace has raised US$300 million at a US$3.4 billion valuation as the fast-growing British defence technology company scales production of its low-cost air defence systems and prepares its next generation of interceptor technology.
Cambridge Aerospace has secured US$300 million in Series C funding, underlining the rapid emergence of defence technology as one of the UK’s most closely watched areas of investment.
The Cambridge-headquartered company said the funding round valued it at US$3.4 billion and would finance an expansion of manufacturing capacity, delivery of existing and new contracts and continued development of its air defence technology.
The investment comes just four months after Cambridge Aerospace raised US$200 million at a US$1.3 billion valuation in its Series B round, highlighting the pace at which the company has grown since being founded in late 2024.
The Series C was led by DFJ Growth with participation from Lux, Accel, Lakestar, Never Lift, Ora Global and Elad Gil & Co. Cambridge Aerospace said the combination of new investment and continued backing from existing investors reflected confidence in its ability to scale production while developing new capabilities.
Central to that expansion is Skyhammer, the company’s first air defence system, which has been developed as a lower-cost alternative to traditional interceptor technologies.
Skyhammer has a range of more than 30km and a top speed of 700km/h. It is designed to intercept aerial threats including drones and low-speed missiles, reflecting growing military demand for systems capable of countering large numbers of relatively inexpensive unmanned aerial vehicles.
The economics of drone warfare have created a significant challenge for defence planners. Using sophisticated and expensive conventional missiles to destroy comparatively cheap drones can impose an unsustainable cost imbalance, particularly during prolonged conflicts or large-scale attacks.
Cambridge Aerospace is seeking to address that imbalance by combining relatively low-cost interceptors with autonomous technology and rapid manufacturing.
From development to deployment
Development of Skyhammer began in January 2025 and initial flight testing was completed within six weeks. The company subsequently adopted an iterative development programme involving regular testing across different operational scenarios.
Recent trials have included autonomous platforms identifying, tracking and intercepting drone targets under varying conditions. Skyhammer has also been designed to work with different sensor systems, allowing it to become part of wider layered air defence architectures rather than operating as a standalone platform.
The technology has already attracted the attention of the UK Ministry of Defence.
In April, the MOD announced plans to purchase a significant number of Skyhammer systems, with deliveries scheduled to begin the following month and continue over a six-month period.
Cambridge Aerospace has subsequently secured further MOD contracts, including work associated with the Low-Cost Effectors & Autonomous Platforms (LEAP) programme announced in July. The initiative reflects the UK military’s wider effort to develop affordable weapons and autonomous systems capable of being manufactured and deployed at greater scale.
Manufacturing becomes the next challenge
Having moved rapidly through product development and initial contracts, Cambridge Aerospace now faces the challenge confronting many defence technology start-ups: moving from successful prototypes and early deployments to industrial-scale manufacturing.
The company said a significant proportion of the Series C funding would therefore be directed towards expanding production.
Cambridge Aerospace has already been increasing manufacturing capacity, including developing an additional production facility to accelerate deliveries. The latest investment provides considerably more capital to expand those operations as demand grows.
CEO Professor Steven Barrett said the company’s priority was matching the pace at which security threats were evolving.
“This raise is testament to the incredible work of the entire Cambridge Aerospace team. By bringing together the best talent in the world with a singular mission to protect Allied skies from threats we have achieved a huge amount already,” Barrett said.
“The addition of these funds will allow us to continue to scale our manufacturing and our delivery to meet the pace of threats and the needs of Allied nations.”
DFJ Growth founder and Managing Partner Randy Glein said the increasing use of inexpensive attack drones had created demand for a different approach to air defence.
“Cambridge Aerospace is solving one of the most pressing challenges of modern warfare. They have developed an affordable and accurate counter UAS system for eliminating the inbound threats and battlefield chaos caused by low-cost aerial attack drones,” he said.
“We surveyed the global landscape and identified Cambridge as having the best team and technology to build the most advanced and modern air defense infrastructure for Europe and its allies.”
Building a defence technology workforce
Cambridge Aerospace’s expansion has also been unusually rapid from an employment perspective.
The company now employs more than 250 people, around two-thirds of whom work in technical and engineering positions. Its workforce combines aerospace and technology specialists with veterans from Allied armed forces, giving development teams access to both engineering and operational experience.
The leadership team similarly combines aerospace, military and technology backgrounds.
Barrett is an aerospace engineer while Chief Commercial Officer Chris Sylvan served for more than a decade in the Royal Marines before moving into emerging defence technology. Co-founder Junaid Hussain previously founded several emerging technology businesses.
The company believes this mixture of experience helped accelerate Skyhammer from development into operational production.
Cambridge Aerospace is also developing its next product, Starhammer, which is scheduled to reach the market in 2027. Details remain limited but its development demonstrates that the company intends to build a broader portfolio rather than depend solely on Skyhammer.
Its international footprint is growing alongside its product range. In addition to its UK operations, Cambridge Aerospace now has a presence in Germany, Poland, Norway, Ukraine and Australia.
Defence technology investment accelerates
The speed of Cambridge Aerospace’s fundraising illustrates the broader change taking place across the defence technology market.
Military procurement has traditionally involved lengthy development programmes dominated by large established defence contractors. The growth of drones, Artificial Intelligence, autonomous systems and software-defined military capabilities is increasingly opening opportunities for technology-led companies capable of developing products much faster.
Ukraine has reinforced that shift by demonstrating how inexpensive drones, autonomous platforms and rapidly evolving software can alter battlefield operations.
For investors, that change is creating a potentially significant technology market spanning counter-drone systems, autonomous aircraft, battlefield communications, sensing, Artificial Intelligence and next-generation manufacturing.
Cambridge Aerospace’s increase in valuation from US$1.3 billion in April to US$3.4 billion following its Series C provides a particularly striking example of the capital now flowing towards the sector.
However, the company’s longer-term position will ultimately depend less on its valuation than its ability to turn technological development into reliable manufacturing at scale.
With MOD contracts secured, production capacity expanding and Starhammer scheduled for 2027, Cambridge Aerospace is moving quickly from defence technology start-up towards industrial supplier.
The US$300 million Series C gives it considerably more resources to make that transition. In a defence market increasingly focused on affordability, autonomy and manufacturing speed, its progress will also provide an important test of whether a new generation of European defence technology companies can scale quickly enough to meet rapidly changing military requirements.
