She spent four years at the Royal Danish Ballet learning that precision is non-negotiable. Now she is teaching markets the same lesson - onchain.
Ask Kaledora Kiernan-Linn what Ostium does and she will not start with the blockchain. She will start with a copper contract, or a barrel of oil, or the Nikkei 225, and the strange fact that until recently you could not bet on any of them onchain without trusting a broker who could widen your spread or freeze your account on a Tuesday afternoon.
Ostium, the company she co-founded in 2022 and now runs as CEO, is an onchain exchange for perpetual futures on real-world assets. Stocks, metals, oil, equity indices, foreign exchange - all of it as perpetuals, the no-expiry contract that crypto traders made famous, now pointed at the assets that move the actual economy. In December 2025 the company closed a $20 million Series A led by General Catalyst and Jump Crypto's crypto arm, at a valuation of roughly $250 million. Coinbase Ventures, Wintermute and GSR came along too.
Her phrase for where this all goes is deliberately uncomfortable: the "perpetual-ification of all assets." Every market, eventually, becomes a liquid perpetual swap. She is not waiting for the world to agree.
"2022 through the beginning of 2025 was like conviction hell."Kaledora Kiernan-Linn, on the years before the breakout
Before any of this, there was the barre. Kiernan-Linn trained under what she has described as "old-school, like Soviet teachers, very exacting." As a teenager she won a place at the Royal Danish Ballet and danced there for four years. Ballet is a discipline that does not grade on a curve - a turn is landed or it is not - and that intolerance for the approximate shows up later in how she talks about markets that "arbitrarily" change the rules on you.
She had dropped out of Harvard for five years to chase the stage. Then she went back to finish a degree in neuroscience, which is not the resume line you expect from a derivatives founder, and that is rather the point.
At Harvard she met Marco, an engineering student. The two started running arbitrage trading strategies out of a hacker house in Cambridge - the kind of arrangement where the whiteboard and the kitchen table are the same surface. What they kept hitting was friction: opaque platforms, circular crypto-on-crypto products, no clean way to express a view on the real economy onchain.
"We thought there was going to be a rotation - from a world focused on a single asset class to one where people would be cross-asset by default. The macro was going to become the driver of why people traded."
Ostium turns traditional markets into onchain perpetuals. The quote is derived from institutional liquidity and anchored by oracle infrastructure, then executed onchain. Once your position is open, as Kiernan-Linn puts it, "the protocol can't arbitrarily widen spreads, change financing terms, freeze accounts, or introduce new constraints."
Hard commodities, no expiry, no broker holding the keys.
Access American and Asian markets from anywhere.
The macro book, settled with the neutrality of a blockchain.
The capital arrived in steps, and so did the conviction. A seed round in 2023 funded the launch of the real-world-asset trading hub. Two years later, after what she calls "a completely insane breakout year," the Series A landed with names that do not write small checks lightly.
Bars indexed to total funding of roughly $23.5M. Series A valued Ostium at about $250M.
Wins a company place as a teenager and dances professionally for four years under exacting, old-school instruction.
Co-founds Ostium with Marco Antonio Ribeiro after running arbitrage strategies from a Cambridge hacker house.
Raises $3.5M and ships the real-world-asset trading hub. Speaks at Chainlink's SmartCon on credible neutrality in DeFi.
"A completely insane breakout year." Named to Forbes 30 Under 30 in Finance and closes a $20M Series A at ~$250M.
Targets the offshore CFD broker market and pushes custody to traders instead of brokers. "Now we're doing the one to 50."
2026 is our year of scale. We did the zero to one. Now we're doing the one to 50.Kaledora Kiernan-Linn
She has put a clock on it: within five years, decentralized finance disrupts the global contract-for-difference broker market. Retail FX and commodities migrate first. The reach is deliberately global and deliberately careful - "We respect local laws; our primary focus is replacing the trading infrastructure with one that doesn't require a user to trust a centralized entity in a jurisdiction they can't sue."
Her favorite analogy is not a financial one. It is Uber - which did not just take share from taxis, it grew the entire market by orders of magnitude. She thinks onchain perpetuals do the same thing to trading.
A dancer turned founder building the rails for the next market structure. Worth a forward.