A two-year-old startup is now worth $3.4 billion
Cambridge Aerospace, a British air-defense company that did not exist before 2024, has raised $300 million in Series C funding at a $3.4 billion post-money valuation, a leap that captures just how fast money is now moving into the business of shooting cheap drones out of the sky.
The round was led by DFJ Growth, the San Francisco firm known for early bets on SpaceX and defense-tech champion Anduril, with participation from Lux Capital, Accel, Lakestar, Never Lift, Ora Global and angel investor Elad Gil. It brings Cambridge Aerospace's total funding since its founding to more than $630 million, and it arrives barely four months after the company closed a $200 million Series B at a $1.3 billion valuation. That is a 2.6x markup in a single quarter, one of the steepest valuation climbs any European defense startup has ever posted.
The premise is simple and, for allied militaries, painful: a Shahed-style attack drone can cost a few tens of thousands of dollars, while the interceptor missiles fired to destroy it can run into the millions. That math, exposed nightly in Ukraine and in the missile-and-drone exchanges around Iran, is what Cambridge Aerospace is built to break.
What the company actually makes
The centerpiece product is Skyhammer, an autonomous, software-defined interceptor designed to knock down drones, loitering munitions and low-speed cruise missiles at a fraction of the cost of legacy air-defense rounds. A second system, the rocket-powered Starhammer, is aimed at faster missile threats and is slated to reach the market in 2027. A radar system, Looking Glass, rounds out the stack, giving the company a sensor-to-shooter chain rather than a single widget.
The autonomy is the point. Cheap threats arrive in swarms, faster than human operators can assign and fire interceptors one by one, so the value proposition rests on software that can detect, prioritize and engage many targets at machine speed and at low unit cost. It is the same "attritable mass" thesis that vaulted Anduril to a multibillion-dollar valuation, transplanted to European soil and pointed specifically at the drone problem.
The capital is going largely into steel and concrete. Cambridge Aerospace is building what it calls Europe's largest solid rocket motor factory in Norfolk, England, targeting a production tempo of 2,500 Skyhammer units per month by March 2027. Solid rocket motors are a notorious bottleneck across the Western defense industrial base, so a startup promising to pour that capacity at scale is selling supply as much as technology.
Government pull, not just investor push
Unlike many defense-tech startups still hunting for a first program of record, Cambridge already has customers. In April, the UK government awarded it a multi-million-pound contract to supply interceptor missiles to the British armed forces and Gulf partners; in May, the Ministry of Defence said Skyhammer had been successfully test-fired in Jordan. The company is now pursuing US government opportunities, the next logical prize given DFJ's American footprint.
Newly appointed UK defence secretary Wes Streeting cast the round as national validation. "This valuation is a great vote of confidence in Britain," he said in a statement. "It is exactly what our unicorn scheme is designed to create — British startups scaling into billion-pound companies, creating skilled jobs, cementing the UK's position at the forefront of defence innovation."
The European defense-tech boom, in one deal
Cambridge Aerospace is less an outlier than a symptom. European governments are raising military budgets toward and past NATO's spending targets, and venture capital has followed, pouring record sums into a sector many of the same firms shunned a decade ago. Air defense sits at the white-hot center of it.
"Air defence is in focus because modern conflicts have made the gap impossible to ignore — Europe needs systems that are faster to build, cheaper to field and easier to scale," Adam Niewinski, cofounder and managing partner of Polish investor OTB Ventures, told Sifted earlier this year. That sentence is essentially the entire investment thesis behind this round.
There is a note of caution worth keeping. As Axios's Dan Primack observed, the high cost of legacy interceptors is partly justified by the fact that they work — reliably, against demanding targets. The wave of low-cost air-defense startups still has to prove that cheap and autonomous can also mean effective, at scale, under real fire.
What to watch next
Three things. First, whether Cambridge Aerospace hits its March 2027 production target of 2,500 Skyhammers a month, the number that turns a valuation into a supplier. Second, whether it lands a US Department of Defense contract, which would validate the transatlantic ambitions its investors are paying for. And third, whether Starhammer arrives on schedule in 2027 and performs against faster missile threats — the test that separates a drone-swatting specialist from a full-spectrum air-defense company.
“This valuation is a great vote of confidence in Britain. It is exactly what our unicorn scheme is designed to create - British startups scaling into billion-pound companies, creating skilled jobs, cementing the UK's position at the forefront of defence innovation.”— Wes Streeting, UK Defence Secretary