We invest in what comes after Q-Day.
Backing the companies building the post-quantum world — early, and with conviction.
Q-Day is coming.
The day a quantum computer becomes powerful enough to break the encryption that protects the world's financial systems, communications, and data. It isn't a question of if — only when. The companies preparing for that moment are being built now.
We back the companies defining the post-quantum era — from the hardware racing toward advantage to the security layer the world will be forced to adopt.
We invest early, concentrate where we have conviction, and hold with a clear-eyed view of both the risk and the opportunity. We invest our own capital.
In quantum mechanics, a state that gives a definite answer when measured, and the same answer every time after. Under scrutiny, it holds. It's how we think about the companies we back.
Permanent, private, and our own.
Eigenstate Holdings deploys the proprietary capital of a single family office. That means no pressure to exit on someone else's timeline. We can be patient where the science demands it, and decisive where the opportunity does.
A concentrated set of positions across quantum hardware and quantum-native software.
QuantinuumTrapped-ion hardware leaderEarly position ahead of its 2026 Nasdaq IPO.
Universal QuantumScalable quantum hardwareTrapped-ion architecture built to scale to millions of qubits.
Relational IntelligenceQuantum-native AIBuilt on the foundations of categorical quantum mechanics.
AnthropicFrontier AIEarly position, 2022.