Yass vs Ambani

Susquehanna International Group and Reliance Industries.

The differences

Forbes puts Mukesh Ambani about $6.4B ahead of Jeff Yass.Forbes figures from 15 Oct 2026 and 16 Sep 2026.
Jeff Yass: co-founded it. Mukesh Ambani: inherited and grew it.
Jeff Yass is from United States; Mukesh Ambani is from India.
Mukesh Ambani has held a public or government advisory role; Jeff Yass has none on record.

Put someone else on either side

Yass

Ambani

Net worth, Forbes: $77.8BForbes, 16 Sep 2026; $84.2BForbes, 15 Oct 2026
Net worth, Bloomberg: $88.2BBloomberg, 10 Oct 2026; $80.4BBloomberg, 17 Oct 2026
Forbes rank: No. 30Real-Time list, 16 Aug 2026; No. 21Annual list, 1 Mar 2026
Billionaire since: 2021Forbes added him to the World's Billionaires list in April 2021 with $12 billion, after investigating his holdings; Not stated

How it started: Co-founded itCo-founded Susquehanna with a group of college friends in 1987; Inherited and grew itReliance was founded by his father in 1966; after his father's death in 2002 he and his brother Anil split the group, and he expanded Reliance into refining, telecom (Jio) and retail
Main source: Susquehanna International Group, a proprietary trading firmBloomberg also credits him with a minority stake in ByteDance; Reliance Industries stake held by the promoter groupBloomberg: 'The majority of Mukesh Ambani's wealth derives from a 42% stake in publicly traded Reliance Industries', counting holding companies, trusts and family members
Companies: Susquehanna International GroupSusquehanna International Group: Co-founder and managing director; Reliance IndustriesReliance Industries: Chairman and managing director
Biggest stake: Susquehanna International Group51% owned; Reliance Industries0.12% owned

Born: Year not statedNew York City, United States; 19 Apr 1957Aden, Yemen
Country: United StatesLives in Haverford, Pennsylvania, United States; IndiaLives in Mumbai, India
Education: Bachelor's degreeBS, State University of New York at Binghamton; Bachelor's degreeChemical engineering, Institute of Chemical Technology, Mumbai (University of Mumbai); started an MBA at Stanford University without finishing
Parents: Son of two accountantsForbes adds that his father Gerald later helped build Susquehanna's back-office bookkeeping; Father Dhirubhai Ambani was a yarn trader who founded Reliance in 1966Mother's occupation not stated

Giving Pledge: Not a signer; Not a signer
Foundation: Yass Foundation for Education (Yass Prize)Janine and Jeff Yass founded the Yass Prize, run with the Center for Education Reform since 2021; Reliance FoundationSet up in 2010 for Reliance Industries' philanthropy; chaired by his wife Nita Ambani
Lifetime giving: Not stated; Not stated

Role now: Runs the companyCo-founder and managing director of Susquehanna International Group; Runs the companyChairman and managing director of Reliance Industries
Successor: Not stated; None named. His three children joined the Reliance board in 2023: Akash heads Jio (chairman of Reliance Jio Infocomm since 2022), Isha oversees retail and financial services, Anant works in the energy business
Public office: None found; Member, Prime Minister's Council on Trade and Industry (Government of India)Years not stated
Legal record: 1982: Philadelphia Stock ExchangeSettled an exchange disciplinary matter over a position-limit violation (Rule 1001) with a $1,000 fine, listed as disclosure 1 of 5 on his FINRA BrokerCheck report.; 2021: Securities and Exchange Board of India (SEBI)SEBI fined him 150 million rupees over 2007 trades in Reliance Petroleum shares that it called fraudulent; the Securities Appellate Tribunal quashed the fine in 2023 and the Supreme Court dismissed SEBI's appeal in 2024.