Pomegra
UK photonic chip startup OLIX closed a $312M Series B backed by Arm and Reed Hastings at a $3.3B valuation, tripling its worth in six months as it bets on light-based AI inference silicon.
- OLIX raised $312M (€270.5M) at a $3.3B (€2.8B) valuation in what is Europe's largest semiconductor funding round on record.
- The round includes Arm, Hudson River Trading, and Netflix co-founder Reed Hastings, led by Fundomo; all six existing investors expanded their positions.
- Its DX-1 decode accelerator targets AI inference workloads and is on track for first customer delivery in H2 2027.
Lead
OLIX, the London-based photonic chip startup founded in 2024 by 25-year-old Thiel fellow James Dacombe, announced on August 3, 2026, that it has closed a $312M Series B at a $3.3B valuation. The round was led by Fundomo and backed by Arm, quant trading firm Hudson River Trading, and Reed Hastings, the co-founder of Netflix. Existing investors Plural, Hummingbird Ventures, Phoenix Court, Crane, Creandum, and Transition all returned and increased their stakes.
What Does OLIX Actually Build?
OLIX builds Optical Tensor Processing Units (OTPUs) - processors that route data between chips via light rather than copper wiring. The distinction matters. Traditional AI accelerators are bottlenecked by high-bandwidth memory and heat-intensive copper interconnects. OLIX's approach moves signals optically, at ultra-low latency and with substantially lower energy draw, while eliminating the reliance on constrained components like HBM that have defined - and at times crippled - the supply chains of rival architectures.
The company designs its systems end to end: the chips, the lasers, and the optical network that ties them together. Its first product, the DX-1, is a decode accelerator built specifically for the output and reasoning stage of running AI models. OLIX's broader X-1 platform distributes large AI models across multiple chips, which sidesteps the packaging bottlenecks that currently constrain single-die scaling.
Why Is the Valuation Growing This Fast?
The short answer: the previous round set a low baseline. In February 2026 - just six months before this announcement - OLIX raised $220M at a $1B valuation. The Series B values the company at 3.3x that figure. For a company with no product in customer hands and a delivery target of late 2027, that trajectory demands explanation.
Part of it is investor demand for credible Nvidia alternatives at the inference layer. AI workloads are shifting from training, which Nvidia dominates through its H-series and B-series GPUs, toward inference, where the efficiency calculus is different and the moat is less established. OLIX is pitching directly into that gap. Arm's participation also carries strategic weight: as the dominant licensor of chip architectures, Arm backing a photonic inference startup signals a hedge against the current compute stack, not just a financial bet.
The other part is the investor composition. Hudson River Trading is not a typical venture backer - its participation suggests confidence in the underlying physics and engineering, not just the market narrative. Reed Hastings has made a handful of deep-tech bets since departing Netflix's executive seat; this follows that pattern.
Strategic Moves Alongside the Capital
OLIX used the announcement to make two hires that sharpen its credibility. Professor Nick McKeown, Professor Emeritus of Computer Science and Electrical Engineering at Stanford University, joins the board. McKeown is among the most cited figures in programmable networking and chip architecture - his presence is a deliberate signal to enterprise customers and academic partners about the seriousness of the technical program.
Matt Briers, the former CFO of Wise, joins as chief financial officer. Wise scaled from startup to public company; Briers' appointment suggests OLIX is beginning to build the financial infrastructure for a similar trajectory.
The company operates across London, Bristol, Austin, Toronto, and San Francisco - a footprint that reflects both the UK's chip design talent base and the practical need to recruit near major US semiconductor hubs.
What Comes Next for OLIX?
Funds will be deployed to complete the DX-1 and expand OLIX's custom silicon platform. First customer access is targeted for H2 2027 - a target that, if met, would bring the company from founding to shipping hardware in roughly three years.
The stakes are high at the platform level. If photonic interconnects deliver the latency and efficiency gains OLIX is projecting, the company could carve out a durable position in AI inference infrastructure. If the physics proves harder to manufacture at scale than in the lab - a risk that has slowed photonic computing initiatives before - the $3.3B valuation will look premature.
Outlook
OLIX now holds the record for Europe's largest semiconductor funding round, backed by a coalition of strategic and financial investors that few AI hardware startups could assemble at this stage. The company's photonic approach is technically differentiated, but its timeline remains ambitious and its product unproven at commercial scale. The next meaningful signal will come in 2027, when DX-1 reaches first customers - and the real test of whether optically connected inference silicon can compete on cost and reliability begins.
