Q-CTRL Raises $290 Million in Series C Funding Led by Salesforce Ventures to Scale Quantum Infrastructure Software

Quantum infrastructure software provider Q-CTRL has secured US$290 million (A$415 million) in an oversubscribed Series C funding round led by Salesforce Ventures. Expanded twice to accommodate institutional demand, the round values the Sydney- and U.S.-based company above $1 billion and represents the largest private capital raise recorded for a software-focused quantum technology firm. Q-CTRL Series C Financing & Syndicate ProfileDimensionTransaction / Syndicate DetailsStrategic & Ecosystem SignificanceFunding ProgressionFollows $113M Series B (Oct 2024) & $27.4M Series B-1 (Jan 2023)Establishes Q-CTRL among the most heavily capitalized privately held quantum software companies.Lead & Anchor InvestorsSalesforce Ventures (lead), Bullhound Capital, Affinity PartnersSignals institutional and corporate venture backing for hardware-agnostic quantum control software.New Strategic & Sovereign BackersAMD Ventures, EDGE Group, Australia’s NRFC, MPower Partners, SPARX Asset ManagementStrengthens ties across semiconductor manufacturing, defense, and Japanese industrial markets.Returning SyndicateLockheed Martin Ventures, In-Q-Tel, DCVC, Main Sequence, Square Peg, Alpha Edison, Alumni Ventures, Ridgeline, Salus VenturesMaintains continuity with existing defense, deep-tech, and Australian institutional shareholders. Q-CTRL plans to allocate the new capital toward expanding its AI-driven control software stack and scaling global commercial deployments across finance, energy, defense, and aerospace. Its infrastructure software operates across two primary product lines: Fire Opal and Boulder Opal for suppressing noise and automating calibration in gate-model quantum computers, and Ironstone Opal for GPS-denied quantum magnetic navigation. The financing follows a series of technical and regulatory milestones for the company, including RTCA DO-160 airworthiness qualification for Ironstone Opal across commercial aviation and unmanned platforms, as well as the deployment of its Fire Opal Dynamics Simulator inside the IBM Quantum Functions Catalog. Backed by new regional institutional partners, Q-CTRL also plans to accelerate its commercial expansion across Japan’s industrial and high-performance computing sectors. Official announcement details are available via the Q-CTRL newsroom here. Related QCR coverage of Q-CTRL’s previous funding rounds and recent product milestones includes its $113 million Series B round here, RTCA DO-160 airworthiness qualification for Ironstone Opal here, deployment of the Fire Opal Dynamics Simulator on IBM Quantum Functions here, and autonomous cold-start calibration on QuantWare processors here. In GQI Portal The players behind the news The team that writes QCR tracks every company, deal and technology in the GQI Factory, GQI's verified database of the quantum industry. Next up: every story linked to its players, coming to QCR's paid plans. Players →Companies and institutions across the quantum industry, by segment. Scorecards →How the players compare on hardware, software, funding and more. Newsletter QCR Alerts in your inbox The latest reporting and analysis from Quantum Computing Report. Free, unsubscribe any time. Sign up for QCR Alerts Leave a commentCancel replyAll fields are required. Your email address will not be published.CommentName Email Type in the text displayed above Δ