Christian Weedbrook, the founder and CEO of Xanadu Quantum Technologies, based in Toronto, became a billionaire this week without any investment from NVIDIA in his company. His 46.4 million multiple-voting shares were valued at around $1.5 billion by Friday, as Xanadu’s stock nearly quintupled over six trading sessions. This surge was not due to Xanadu’s actions but because NVIDIA announced a range of open-source AI models and a new hardware architecture to advance quantum computing, causing a sector-wide rally that benefitted Xanadu the most, as it is the only publicly traded pure-play photonic quantum computing firm.
Xanadu went public on March 27 through a SPAC merger with Crane Harbor Acquisition Corp., listing on the Nasdaq and the TSX. The stock was already rising from its IPO price before NVIDIA’s announcements began on April 14. It increased by 17% on Friday, 28% on Monday, 29% on Tuesday, and 70% on Wednesday, with the Canadian Investment Regulatory Organization enforcing five trading halts in one session. Since listing, the stock has risen by about 194%.
NVIDIA did not purchase Xanadu shares, form a contract, or name it a partner. NVIDIA made quantum computing appear closer to practical usability, which was reflected across the quantum stock market.
On April 14, NVIDIA released Ising, a series of open-source AI models to tackle error correction and calibration issues, making quantum computers more viable. The error correction models are up to 2.5 times faster and three times more accurate than current industry benchmarks. The calibration models cut quantum processor setup time from days to hours, addressing key bottlenecks that made quantum hardware costly and tough to scale.
NVIDIA also introduced NVQLink, an open system architecture to link its GPUs with quantum processing units, supporting 17 QPU builders, five controller makers, and nine US national labs. It also launched the NVIDIA Accelerated Quantum Research Center in Boston to integrate quantum hardware with AI supercomputers. NVIDIA’s initiative signals that quantum computing is transitioning from a research venture to an engineering challenge, with NVIDIA offering the bridge between classical and quantum systems.
NVIDIA’s NVentures has already placed investments across the quantum sector, leading Quantinuum’s $600 million Series B at a $10 billion valuation, participating in QuEra Computing’s $230 million round, and joining PsiQuantum’s $1 billion raise at a $7 billion valuation. These investments cover various quantum hardware technologies, including Xanadu’s photonics, which was enough to significantly raise its stock price.
Xanadu builds quantum computers using light beams to encode qubits, which proponents argue are more scalable than competitors due to manufacturability with existing semiconductor processes. Its Aurora system is a modular photonic quantum computer with real-time error correction and has achieved 12 logical GKP qubits, a notable technical milestone.
Financially, Xanadu is at an early stage, with 2025 revenue of $4.6 million, a 188% increase from the previous year, against a net loss of $70.7 million. The IPO raised approximately $302 million. Its customers and partners include Lockheed Martin, AMD, Rolls-Royce, Tower Semiconductor, and Applied Materials, and it is securing up to C$390 million in co-investment from Canadian and Ontario governments. Xanadu has opened a $10 million advanced photonic facility in Ontario and partnered with Corning and Applied Materials for production.
The company aims for fault-tolerant quantum systems by 2029-2030. However, its current revenue does not justify its multi-billion-dollar market valuation today.
Xanadu was not the only company to experience gains. IonQ rose over 50% for the week, D-Wave climbed over 50%, and Rigetti gained over 30%. These increases indicate NVIDIA’s announcements validated quantum computing’s near-term commercial potential.
There is skepticism over quantum computing valuations. Rigetti’s stock trades at roughly 1,025 times sales, D-Wave at 325 times. The valuation levels exceed those of the dot-com bubble, despite quantum computing being years away from significant revenue.
Practical quantum uses in fields like drug discovery and financial analysis are forecast for around 2040. The total quantum computing market is projected to reach $4 billion by 2030, far less than the current combined market cap of publicly traded quantum companies.
Xanadu’s dramatic market cap despite early-stage revenue exemplifies the gap between sector potential and current economics. Weedbrook’s billion-dollar wealth is real but relies on market optimism for photonic quantum computing.
The larger takeaway is about NVIDIA’s influence on sector valuations. By developing tools that integrate quantum computing with its GPU ecosystem, NVIDIA is positioning itself at the center of the quantum field’s success rather than predicting its success. This ability to influence the sector is why announcements that did not mention Xanadu still made Weedbrook a