Monarch Quantum, a developer of integrated photonics hardware for quantum technologies, has raised $55 million from an oversubscribed growth round. This was led by Serendipity Capital with participation from 55 North 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 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.
“Quantum technologies are reaching a point where infrastructure matters as much as the qubits themselves,” said 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 are a critical enabler for the deployment of quantum technologies.
Infrastructure gap
Quantum technologies are set to transform industries from healthcare to national security, with governments accelerating investment through initiatives like the US 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.
Monarch Quantum is led by a team with a successful history of turning advanced photonics research into commercial technology platforms. 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.
Investors
The Monarch Quantum growth capital round brings together a syndicate of institutional investors with deep experience across the full quantum technology stack, photonics infrastructure, and supply chain supporting the quantum ecosystem.
Serendipity Capital invests in companies that enhance and secure the critical technologies and infrastructure of tomorrow. Their permanent capital structure allows them to invest for the long term.
Through the expertise within their ecosystem, they facilitate access to strategic partners, provide the capital and offer hands-on practical support to enable their leading portfolio companies to realise their potential.
Kai Hudek, general partner at 55 North, said that Quantum technologies will only achieve real impact if they can be engineered and manufactured at scale.
“We see Monarch’s technology as critical infrastructure for the ecosystem, enabling quantum platforms to move from bespoke laboratory setups to reliable, manufacturable systems,” said Hudek. “The company combines deep photonics expertise, strong systems engineering, and high-quality manufacturing validated by real commercial demand.”
David Park, general partner of Global Innovation Labs said that as demand for photonic technologies accelerates across these sectors, Monarch’s platform has the potential to unlock new performance frontiers.
