❯ Quantum computing company Oratomic raises a $475 million Series B, lifting its valuation from $1.5 billion to $5.5 billion in three months

Six firms co-leadCalifornia quantum computing company Oratomic announced a $475 million Series B on October 8. According to SiliconANGLE, ARCH, Spark Capital, Khosla Ventures, Index Ventures, General Catalyst and Bezos Expeditions co-led the round, bringing total funding to $775 million and lifting the valuation from $1.5 billion to $5.5 billion.

Qubits from neutral atomsFounded in 2025, Oratomic builds qubits, the basic computing units of a quantum computer, from reconfigurable arrays of neutral atoms. Qubits are extremely fragile: slight disturbances in heat, electromagnetism or vibration can make them lose information, so error correction is needed. The industry generally assumes about 1 million qubits for commercially meaningful fault tolerance; Oratomic believes it needs only 10,000.

The last round was three months agoIts Series A was $300 million, just three months before this one. CEO Dolev Bluvstein told the Wall Street Journal the company has no idea what the business models or exact applications will be, only that it must first build a working computer that is cheap and manufacturable.

Other approaches will be measured against itThe same day, UK-based Universal Quantum, which uses trapped ions, announced a Series A of more than $100 million. SiliconANGLE cited McKinsey data showing the quantum computing industry generated just over $1 billion in revenue worldwide in 2025. With a one-year-old company valued in the billions, investors will compare technical approaches on metrics such as qubits required, and the bar for raising money rises for other companies too.

▮ SIGNALQuantum fundraising is starting to move at the pace of AI model companies, but without revenue to verify it, the valuation rests on an engineering hypothesis that has yet to be proven.