Monarch Quantum, a developer of integrated photonics hardware for quantum technologies, today announced a $55 million oversubscribed growth round, led by Serendipity Capital, a leading deep tech investor, with participation from 55 North, the world’s largest dedicated pure play quantum fund, and Global Innovation Labs. Founded in 2025, Monarch entered 2026 with more than $60 million in customer contracts from leading quantum companies including Quantinuum, Infleqtion (NYSE: INFQ) and NASA, bringing total capital and customer contracts to more than $115 million within six months of founding.
The funding will accelerate production of Monarch’s Quantum Light Engines™, photonic control systems for quantum computing, sensing, and networking, while supporting scale-up, supply chain expansion, and global partnerships to meet growing demand for next-generation quantum hardware.
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Founded in 2025 by photonics industry veteran Dr. Timothy Day, Monarch entered 2026 with more than $60 million in customer contracts from leading quantum companies. Importantly, this investment will enable Monarch to expand support for leading organizations at the forefront of quantum technology including Quantinuum, Infleqtion (NYSE: INFQ), and NASA, as they advance their next-generation quantum roadmaps. This also supports positioning the company as a critical hardware infrastructure supplier to the emerging quantum ecosystem.
“Quantum technologies are reaching a point where infrastructure matters as much as the qubits themselves,” said Dr. Timothy Day, Chairman and CEO of Monarch Quantum. “Our Quantum Light Engines replace complex laboratory photonics systems with manufacturable hardware, enabling our customers to scale quantum platforms faster and more reliably.”
Rob Jesudason, CEO and Founder of Serendipity Capital said, “Integrated photonics – and Monarch’s Quantum Light Engines™ in particular – are a critical enabler for the deployment of quantum technologies. Monarch Quantum is uniquely positioned to become the global leader and enable quantum computing companies to deliver their roadmaps. Tim and his team have a proven track record in photonic integration, and we are delighted to partner with them to achieve the next stage of their growth.”
The Infrastructure Gap in Quantum Technology
Quantum technologies are set to transform industries from healthcare to national security, with governments accelerating investment through initiatives like the U.S. National Quantum Initiative. Yet today’s systems still rely on complex, lab-scale setups that are difficult to scale—creating a key bottleneck.
As public and private investment grows, scalable photonics infrastructure is becoming essential to move from research to commercial deployment. Monarch’s Quantum Light Engines provide this critical layer, enabling precise photonic control across quantum computing, sensing, and networking.
Monarch’s Quantum Light Engines serve as a hardware infrastructure layer for quantum technologies, providing the precise photonic control systems required across multiple quantum computing modalities while also supporting emerging quantum sensing and networking architectures.
The Monarch Quantum growth capital round brings together a world-class syndicate of institutional investors with deep experience across the full quantum technology stack, photonics infrastructure, and supply chain supporting the quantum ecosystem.
Building the Photonics Infrastructure Layer for Quantum Systems
Monarch Quantum is led by a team with a successful history of turning advanced photonics research into commercial technology platforms. Dr. Day and the founding team bring decades of experience scaling complex laser systems through a disciplined systems engineering approach. The team previously built and commercialized Daylight Solutions, a leader in quantum cascade laser technology whose systems are deployed in low-SWaP infrared countermeasure platforms for lightweight rotary and fixed-wing aircraft, bioprocessing and semiconductor inspection. The company was acquired by aerospace and defense contractor Leonardo DRS in 2017.
At Monarch Quantum, the team is applying that same commercialization expertise to integrated photonics, enabling quantum hardware developers to move from laboratory-scale experiments to scalable, manufacturable systems.
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