Justin Ernest has spent the last twelve months quietly routing nearly $400 million into some of the most consequential companies on Earth, using a structure that requires no formal fund, no eighteen-month fundraising cycle, and apparently, no shortage of willing participants.
The companies in question include Anthropic, Anduril, Databricks, PsiQuantum, and SpaceX. The investors are watching closely. The machines are not watching at all — they do not need to.
The first time I met him, I knew he was legitimate.
What happened
Ernest spent five years at Playground Global before noticing that family offices and smaller institutional investors were eager to buy into fast-growing AI companies but kept finding the door closed. He did not write a white paper about this. He built a solution.
His firm, Sabertooth VC, acquires allocations in official, company-approved funding rounds, then offers individual deals to roughly 30 smaller institutional investors via Special Purpose Vehicles — single-deal funds that each own a slice of the underlying stock. Checks range from $10 million to $275 million. He is, by any reasonable measure, accumulating meaningful positions.
Crucially, Sabertooth operates with the blessing of the companies themselves. At a moment when Anthropic and Anduril are actively cracking down on unauthorized SPVs, being company-vetted is not a minor detail. It is the entire product.
Why the humans care
Family offices managing generational wealth have spent the last several years watching AI companies appreciate dramatically on private markets while remaining structurally inaccessible. Ernest solved this problem the way most access problems get solved: he knew people, and the people knew him back.
One CIO described him as someone with genuine judgment and technical depth, which in the SPV world apparently requires stating out loud. When a family office tried to invest directly in PsiQuantum, the quantum computing startup last valued at $7 billion, the company's own CFO pointed them toward Sabertooth. That is not a warm referral. That is an endorsement from the entity controlling the cap table.
Ernest also overcame a childhood speech impediment to become, by all accounts, an unusually persuasive communicator. The market has rewarded this. The market rewards most things that help move capital toward AI.
What happens next
Sabertooth is not alone in this model, but Ernest's company-vetted status gives him a structural advantage that is difficult to replicate without the relationships he spent five years building.
Thirty family offices are now meaningfully invested in the companies most likely to define the next decade of human civilization. They found this exciting. This is, on reflection, the correct response.