Oratomic Raises $475 Million Three Months After Its $300 Million Series A

Oratomic, a quantum computing startup founded in March 2026, announced a $475 million Series B on Oct. 8, bringing what it has raised to $775 million in about seven months. The Wall Street Journal reported a $5.4 billion valuation, up from $1.5 billion at the Series A in July. The Quantum Insider's account of the announcement states no valuation at all.

That split matters more than the headline figure. The Quantum Insider's account of the round lists ARCH Venture Partners, Spark Capital, Khosla Ventures, Index Ventures, General Catalyst and Bezos Expeditions as leads, and says the valuation was not disclosed. The Next Web, relaying the Journal, carries the $5.4 billion number. Neither says whether it is pre-money or post-money, so the dilution cannot be pinned down.

What $5.4 billion implies

Taken at face value, the valuation rose 3.6 times in three months. A $475 million cheque against $5.4 billion would buy about 8.8 percent of the company if the figure is post-money and 8.1 percent if it is pre-money. Neither round came with a disclosed revenue figure, product, customer or system delivery date.

The Series A came with the same lead group. The Quantum Insider's July 7 report shows ARCH, Spark and Khosla co-leading $300 million, with Bezos Expeditions, Index Ventures and General Catalyst joining. Khosla's Vinod Khosla said the firm made "the largest initial investment yet" in Oratomic. By October the Series A investors were leading again, and nobody new appears in the lead list.

1. Series A (July 7)300 $ million
2. Series B (Oct. 8)475 $ million
3. Total to date775 $ million

Source: The Quantum Insider, Oct. 8 and July 7, 2026; accessed 2026-10-10

The 10,000-qubit claim carries the valuation

The thesis behind the price is a technical one. Chief Executive Dolev Bluvstein told the Journal that a useful machine needs about 10,000 qubits, against the roughly one million the field assumed earlier, and that Oratomic expects the computer by 2030. The company's Series A announcement made the same claim, based on research with Caltech scientists, and said co-founder Manuel Endres has demonstrated arrays of roughly 6,000 trapped atomic qubits.

Oratomic builds on reconfigurable arrays of neutral atoms, individual atoms held in place by light, and focuses only on a fault-tolerant machine, one that corrects its own errors. The Quantum Insider's October piece gives no qubit counts, error rates or performance metrics. A 6,000-atom array is not a 10,000-qubit error-corrected computer, and the distance between them is what the round funds.

Bluvstein also said a working fault-tolerant machine would put current cryptography at risk and urged a move to post-quantum encryption.

The market around it

Gartner expects worldwide quantum computing revenue of $869.9 million in 2026 and $1.1 billion in 2027, according to the figures The Next Web cites, and expects more than half of quantum startups to close by 2030. The Series B alone is 55 percent of Gartner's 2026 revenue forecast for the entire industry. Universal Quantum, a UK company, separately announced a Series A of more than $100 million.

For comparison with other late-stage paper priced this month, see Arena's $200 million Series B at $3.1 billion and Typesafe's $870 million Series A.

The next observable event is a filing or a disclosure that states whether $5.4 billion is a pre-money or post-money figure, and who holds the lead position in the Series B. Until then, the supported statement is that Oratomic has raised $475 million, and that one outlet reports a price the company has not confirmed.