Quantum computing startup Oratomic has raised $775 million in total funding for the development of fault-tolerant quantum systems.
The announcement comes three months after Oratomic announced it had raised $300 million in a Series A financing round.
In a statement, Oratomic said the new funding will support the continued growth of its scientific and engineering team, laboratory infrastructure, and the systems required to build its quantum computers.
The Pasadena-based startup emerged from stealth in March 2026, and is “focused exclusively” on building a fault-tolerant quantum computer.
One of the startup’s founders, Manuel Endres, has previously said that Oratomic has already trapped arrays of 6,000 atomic qubits.