Atom Computing Raises $300M, Including $100M Series C

Atom Computing has raised over $300 million in new funding, including a $100 million Series C led by Third Point Ventures. The round also includes plans for $100 million in grant funding from a U.S. Department of Commerce program, according to a company statement Tuesday.

The fresh capital positions the quantum computing firm to accelerate development of its neutral-atom architecture. Atom Computing traps individual atoms in optical tweezers to serve as qubits, a method that scales differently than the superconducting circuits used by rivals like IBM and Google.

Third Point Ventures led the Series C. Chrysalix Venture Capital and the University of Tokyo Edge Capital also participated, bringing total equity funding in the round to $100 million. The remaining capital comes from a planned $100 million award through the Commerce Department's CHIPS and Science Act programs. The company said the award is in the final stages of negotiation.

Atom Computing had previously raised $15 million in a 2021 Series A and an undisclosed amount in subsequent convertible notes. The new financing brings its total raised since inception to roughly $320 million, nearly double the entire amount the quantum sector attracted globally in venture funding during the first quarter of 2025, per PitchBook data.

The company is not publicly traded. Its largest corporate backers include Honeywell and Microsoft, both of which have their own quantum roadmaps. Honeywell's Quantum Solutions unit focuses on trapped-ion qubits. Microsoft offers Azure Quantum as a cloud platform for various hardware approaches. Atom Computing's balance sheet now rivals that of publicly traded quantum names IonQ and Rigetti Computing.

The quantum computing market has seen a burst of early-stage capital this year, driven by advances in error correction and longer coherence times. Atom Computing demonstrated a 1,225-qubit system in late 2024, one of the largest publicly disclosed neutral-atom processors. The company said the new funds will expand its headcount in Boulder, Colorado, and Berkeley, California, and fund work on a multi-module chip interconnect that links multiple quantum processors.

"The next milestone is showing logical qubit operations below the fault-tolerance threshold at scale," Chief Executive Rob Hays said in the statement. Atom Computing intends to have a commercial system running by 2027.

For CSCO investors, the Atom Computing deal holds indirect relevance. Cisco Systems invests in quantum networking technologies through its corporate venture arm and participates in standards bodies like the QED-C consortium. The company has not disclosed direct equity in Atom Computing. The buildout of quantum hardware creates eventual demand for networking gear that links quantum nodes to classical data centers. CSCO stock page

The Commerce Department grant component also signals Washington's sustained interest in quantum research and could mean more government contracts for the broader ecosystem, including defense-linked quantum firms.

Atom Computing competes in a field where the timeline to revenue remains uncertain. Most quantum companies still operate at losses. The path to a commercially viable fault-tolerant machine runs through technical challenges in qubit connectivity and error rates. The company's new financing gives it a capital runway that extends past several hard engineering milestones, the CEO said.

Further CHIPS Act awards to quantum startups and joint development agreements between Atom Computing and cloud providers such as Microsoft or Amazon Web Services will be key milestones. The organizational partner list already includes the University of Wisconsin-Madison and the Department of Energy's Oak Ridge National Laboratory, both of which are testing Atom Computing's hardware for materials simulation workloads.