John G. Fonss ’84

Jack died March 12, 2024, in New Canaan, Conn. He grew up in Jackson, N.J., and graduated from Lawrenceville Academy.

Jack was an exceptional runner. At Princeton, he was a NCAA All-American in cross country and first team All-Ivy from 1981-83, and he set the school record for 1,500 meters. His teammates remember him as extremely talented and competitive, a quick wit, and a mentor. He majored in economics and brought his competitiveness to his goal of “winning” the corporate finance class stock market simulation.

Jack earned a master’s degree from Yale School of Management. He worked in New York City at McKinsey, Morgan Stanley, Credit Suisse, Deutsche Bank, and UBS Securities. Jack was an early adopter of technology, a rare non-engineer in our era who learned computer programming at Princeton, which he leveraged to found AccuShares, a financial technology firm. After the sale of AccuShares, he continued his interest in computers and financial technology with six U.S. patents in blockchain technology, derivatives, and exchange-traded funds.

Jack is survived by his wife, Janet Leung; son Maxwell; and daughter Ava ’27; and his parents. The Class of 1984 and his teammates from the classes of 1981-87 mourn his loss.