Robert Granieri — SPARQNOW

At-a-Glance

Co-founder of Jane Street Capital (founded 1999), an electronic liquidity provider accounting for roughly one-quarter of U.S. ETF volume by 2024.
Began his trading career at Susquehanna International Group.
Financed the Scarlet Pearl Casino resort in D'Iberville, Mississippi.
Supports effective-altruism causes, criminal-justice reform, and psychedelic research.
Earned a bachelor's degree from the University of Pennsylvania in 1992.

Biography

Robert Anthony Granieri is an American billionaire financier, philanthropist, and co-founder of Jane Street Capital. Born on April 6, 1972, he earned a bachelor's degree from the University of Pennsylvania in 1992. Granieri began his trading career at Susquehanna International Group before co-founding Jane Street in 1999 with Michael Jenkins, Timothy Reynolds, and Marc Gerstein.

The firm grew into a leading electronic liquidity provider, accounting for approximately one-quarter of U.S.