The Citadel Alumn Reshaping The World Of Trading

Vlad, founder and CEO of Lighter, was personally recruited by Ken Griffin to join Citadel at 19 after graduating Harvard in two and a half years, having entered at 16. He began programming at eight, competed in physics and informatics Olympiads from around 12, and chose to concentrate in economics at Harvard because developments in option pricing, portfolio theory, and monetary economics let him apply math and programming skills in a field he saw as faster-moving and better-funded than physics or biology. His first Harvard microeconomics midterm score of 94 against a class average of 37 was described by the professor as historically among the highest standardized scores since the course began, leading to a research invitation.

Griffin spent significant time in Vlad's first week walking him through how he thinks about markets and gave him track records of competitor funds to analyze. Vlad flagged Madoff because his Sharpe ratio was implausibly high given his claimed options strategy, and Griffin told him in 2004 that Madoff was running a Ponzi scheme, five years before the fraud was publicly uncovered. An SEC report later confirmed three anonymous hedge fund managers had reported Madoff to the SEC, but the agency accepted a fake DTCC account number without ever calling DTCC to verify it, a check that would have immediately exposed the fraud. Madoff never executed any actual trades and simply reported fabricated returns to limited partners.

The Madoff case became a direct motivation for Vlad's interest in applying blockchain to finance. He argues that on-chain settlement would have made a Madoff-style fraud impossible because all trades would be publicly verifiable, and that zero-knowledge proofs can allow proof that trades occurred without revealing the specific trades publicly. Lighter uses ZK primarily for scaling rather than privacy, and privacy has not been a significant request from customers.

After leaving finance, Vlad worked at Quora as head of machine learning and then joined Addepar to head engineering. He co-founded Lunch Club with Scott Wu before pivoting to build Lighter through an internal process modeled on Y Combinator, with three simultaneous projects and an internal demo day pitch competition. Eighty percent of the engineering workforce was retained through the pivot, partly because the technical problems at Lighter in cryptography, scaling, and quantitative finance were closer to what engineers actually wanted to work on.

Lighter is building an exchange optimized simultaneously across low cost, low latency, verifiability, and security. The firm builds custom ZK circuits designed specifically for finance rather than adapting general-purpose circuits, and claims those custom circuits require only one percent of the compute needed for general-purpose equivalents. Lighter has partnerships with Telegram Wallet and Robinhood, both of which conducted technical diligence before partnering. Robinhood Chain is built on Ethereum, and Vlad describes Ethereum as the most secure ledger for DeFi, functioning as the on-chain equivalent of a clearinghouse in traditional finance with roughly ten years of stability. Moving off Ethereum is not among the top priorities on the technical roadmap.

The primary technical focus for Q3 2026 is building real options on-chain on the same balance sheet and risk collateral model as perpetuals and spot within Lighter, with options trading through Robinhood as the stated goal. Lighter is a US C-corp with no dual foundation structure. The equity round raised before token launch was committed to be the last equity round the company will ever raise, was five times oversubscribed, and only one percent of the cap table chose to exit at that point. All value accrues to the token rather than equity.

Vlad predicts that once crypto clarity legislation passes and the SEC continues to develop its approach to token treatment, Lighter's token could also function as equity with no regulatory ambiguity. He notes that in a world where equities are tokenized, a company holding both a utility token and equity would effectively carry two tokens, making the current single-token structure a potential structural advantage if that regulatory clarity arrives.