NVIDIA didn’t invest in Xanadu, but it made its CEO a billionaire anyway

Xanadu Quantum Technologies CEO Christian Weedbrook became a billionaire after the company's stock surged nearly fivefold in six trading sessions, driven entirely by NVIDIA's announcements — not any direct investment in Xanadu. NVIDIA launched Ising, a family of open-source AI models for quantum error correction and calibration, and NVQLink, an architecture connecting GPUs to quantum processing units. These moves validated quantum computing as a near-term engineering problem, triggering a sector-wide rally. Xanadu, the only publicly traded pure-play photonic quantum company, was the biggest beneficiary despite having just $4.6M in 2025 revenue against a market cap that briefly exceeded $3 billion. The piece examines the extreme valuation multiples across quantum stocks — Rigetti at 1,025x sales, D-Wave at 325x — and questions whether the market's timeline matches the technology's actual trajectory. The broader theme is NVIDIA's ability to reshape entire sectors through strategic positioning, ensuring it sits at the center of quantum computing if and when it matures.