He gave one engineer a $15,000 piece of bad tax advice. Then he built a company so nobody would ever need it again.
// The lawyer who learned to code, the coder who learned to trade, the trader who decided ordinary people deserved a seat at the venture table.
Walk out of a startup on a Friday and a clock starts ticking. Most people have ninety days to find the cash to exercise their vested stock options. Miss it, and the equity they spent years earning simply evaporates. Dave Thornton runs the company built to catch it before it falls.
From Miami, Thornton leads Vested as co-founder, chief executive, and chief investment officer. The pitch is unglamorous and enormous at once: front startup employees the money to exercise their options, cover the taxes and fees, and in exchange take a slice of the shares. The employee keeps real equity instead of a regretful memory. Vested keeps a stake in hundreds of private companies.
As chief investment officer he is also the architect of the funds themselves - the person designing how all those small slices add up into a portfolio. It is an unusual double role. Most CEOs hand the investing to someone else; Thornton built the model with his own hands, which is in character for a founder who has spent two decades at the seam where finance meets engineering.
His larger ambition is stranger. Thornton thinks venture capital - the most exclusive asset class in finance - should behave more like an index fund. Own a little of everything. Stop trying to guess which seed-stage startup becomes the next giant, and instead make sure you hold the few that do.
There is a tenderness underneath the spreadsheets. He talks about the moment a customer realizes the equity they'd written off is suddenly real again. That gratitude, he says, is the clearest signal that the company is solving something people actually feel. It is also a useful reminder that behind the $600 billion abstraction sits a very human ledger of near-misses.
We're not trying nearly as hard as a traditional VC to pick winners. We're more avoiding losers.- Dave Thornton, on the Vested thesis
The math is brutal. The total value of U.S. venture-backed companies runs to roughly $4 trillion. Employees own about 30 percent of that - more than a trillion dollars in options and equity. And at least half of those options are never exercised. They expire. They vanish. Call it $600 billion in value that people earned and then lost, mostly because nobody told them the rules and nobody handed them the cash.
Thornton found the wound the hard way. Running an earlier company, he confidently advised an engineer named Andy Nelson about his stock options. The advice was wrong. Nelson got hit with a surprise $15,000 tax bill. It is the kind of small, specific failure that lodges in your memory and, years later, becomes a business plan.
// Relative scale of the opportunity Vested targets
Vested uses prepaid forward contracts - a structure clever enough to fund an exercise without tripping a company's right of first refusal or forcing a fresh 409A valuation. Employees get tools across the entire equity lifecycle, then the capital to act on them.
A fairness calculator compares your offer to market standards and flags what your grant is really worth.
An equity dashboard alerts you when your company's valuation and share price shift.
An outcome simulator runs the scenarios so the decision isn't a guess.
Vested covers the exercise cost, taxes and fees in exchange for a share of the equity.
Vested didn't arrive out of nowhere. It's the sum of a career that kept circling the same idea: complicated assets, ordinary people, and the gap between them.
Earns a computer science degree from Penn Engineering and an economics degree from Wharton - the rare founder fluent in both the code and the cap table.
Cuts his teeth as a Program Manager, learning to ship product at scale.
Builds systems on a hedge fund trading desk inside Citi Alternative Investments (later Napier Park). His pricing model for illiquid assets reportedly went on to algo-trade some $300M at a major bank.
Adds a Juris Doctor, completing an unusually three-sided education: engineering, finance, and law.
Founds and exits PatientFinder, acquired by Definitive Healthcare, where he then serves as SVP of Innovation.
Co-founds Vested to attack the abandoned-options problem head on - and to test whether venture can be indexed.
Raises seed capital and a follow-on round from backers including Underscore VC and Boston Seed Capital, roughly $4.7M in all.
Most venture capitalists sell conviction - the bold bet on the company they swear will win. Thornton sells the opposite. In early-stage investing, returns follow a power law: a tiny handful of companies produce nearly all the gains. So instead of straining to pick those few, you own as many shots as possible and let the math find them.
It sounds reckless. He insists it's the conservative move. A Vested fund might hold anywhere from 196 to more than a thousand companies. The result, he argues, behaves less like a roller coaster and more like a broad market index - which is precisely the point for the everyday investors he wants to bring into venture.
"You just need to have as many opportunities to grab 100 extras as possible."
"It's really an index fund more than anything else - you're not going to take a huge roller coaster."
He frames competitors as future collaborators: "We're all going to exist as partners for quite a while."
The equity-finance market already had players when Vested arrived. Some focused on late-stage employees at brand-name companies. Others ran marketplaces matching outside investors to specific grants. Thornton planted Vested in the overlooked middle: the long tail of early and mid-stage employees whose options are too small or too obscure for anyone else to bother with.
That long tail is exactly where the value leaks out. It's the engineer at a Series A company, the second marketing hire, the support lead - people with real equity and no clear path to keep it. Rather than treat rivals as enemies, Thornton describes a market where referrals flow both ways and everyone, for now, is a partner. The company plans to grow vertically through the capital stack over time, from current employees toward founders and preferred holders, rather than chasing unrelated adjacencies.
Early and mid-stage startup employees whose options are too small for traditional liquidity providers to touch.
The post-departure window where unexercised options quietly expire - the moment Vested is built to intercept.
Employees lack both the knowledge to value equity and the capital to claim it. Vested closes both.
Run the thesis forward and it stops being about stock options at all. If Vested can buy diversified slices of hundreds of private companies through employees who'd otherwise abandon them, it can package that exposure into something an ordinary investor could one day hold - venture capital, attractively priced, aimed at the top tier of startups, without the country-club access requirements that have always guarded the door.
From its Miami base, the company has stayed deliberately narrow while it earns the right to widen. Thornton calls it sticking to the knitting: prove the funding model, prove the diversification math, prove that employees come away grateful, and let the bigger story compound from there. It is a patient plan from a founder who has already learned, the expensive way, that the details are where equity lives or dies.
"There is a ton of gratitude when we're able to help somebody exercise their options they thought were going to go up in smoke."
"50% to 80% of options go up in smoke at the end of the 90-day post-termination exercise window."
"It's really an index fund more than anything else - you're not going to take a huge roller coaster."
"Every one of these people knew so much more about whatever they cared about than I did." // on his early hedge fund days
Three degrees, three disciplines: computer science, economics, and a law degree. He can read your code, your cap table, and your contract.
His own worst piece of advice - a $15,000 surprise tax bill handed to an engineer - became the origin story of his company.
A pricing model he built for illiquid assets reportedly still algo-trades around $300 million at a major bank.
Every principal at Vested has personally lived the stock-option problem the company solves. It's a team built from shared regret.