Tim Day, Founder of Monarch Quantum

About Tim Day

Tim Day is the Chairman and CEO of Monarch Quantum, a quantum photonics startup based in San Diego, founded in 2025. The company specializes in building quantum light engines for scalable quantum systems, and he announced a $55 million growth capital round in 2026 to help scale its infrastructure.

Tim Day at a glance

• Company: Monarch Quantum
• Total raised: $55M
• Latest round: Growth
• Investors: Serendipity Capital, 55 North, Global Innovation Labs
• Location: San Diego, United States

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