Koch vs Ambani

Koch, Inc. and Reliance Industries.

The differences

Forbes puts Julia Koch about $0.4B ahead of Mukesh Ambani.Forbes figures from 22 Sep 2026 and 15 Oct 2026.
Julia Koch: through marriage. Mukesh Ambani: inherited and grew it.
Mukesh Ambani is about 6 years older than Julia Koch.
Julia Koch is from United States; Mukesh Ambani is from India.
Mukesh Ambani has held a public or government advisory role; Julia Koch has none on record.

Put someone else on either side

Koch

Ambani

Net worth, Forbes: $84.6BForbes, 22 Sep 2026; $84.2BForbes, 15 Oct 2026
Net worth, Bloomberg: $78.5BBloomberg, 10 Oct 2026; $80.4BBloomberg, 17 Oct 2026
Forbes rank: No. 24Real-Time list, 22 Sep 2026; No. 21Annual list, 1 Mar 2026
Billionaire since: 2020Forbes named her the richest newcomer on its 2020 World's Billionaires list, at $38.2 billion, after David Koch died in 2019; Not stated

How it started: Through marriageShe and her three children inherited the 42% Koch stake of her husband David Koch, who died in 2019; they married in 1996; 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: The family's inherited stake in Koch, Inc.Koch says it has diversified from energy into consumer, technology, communications, healthcare and real estate; 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: Koch, Inc.Koch, Inc.: Board member; Reliance IndustriesReliance Industries: Chairman and managing director
Biggest stake: Koch, Inc.42% owned; Reliance Industries0.12% owned

Born: 1963Iowa, United States; 19 Apr 1957Aden, Yemen
Country: United StatesLives in New York City, United States; IndiaLives in Mumbai, India
Education: Bachelor's degreeBachelor's degree, University of Central Arkansas; Bachelor's degreeChemical engineering, Institute of Chemical Technology, Mumbai (University of Mumbai); started an MBA at Stanford University without finishing
Parents: Her family ran Flesher's, a used-furniture shop in Indianola, Iowa, where her father Frederic worked; 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: Julia Koch Family FoundationFounded in 2023 with her children; she is also president of the David H. Koch Foundation; Reliance FoundationSet up in 2010 for Reliance Industries' philanthropy; chaired by his wife Nita Ambani
Lifetime giving: $1.3BJulia Koch Family Foundation, 17 Oct 2026. 'More than $1.3 billion' given by David and Julia Koch together, through the David H. Koch Charitable Foundation and personal giving; a joint figure, not hers alone. Date is when the page was read; Not stated

Role now: On the boardDirector of Koch, Inc.; chair of the Julia Koch Family Foundation and president of the David H. Koch Foundation; Runs the companyChairman and managing director of Reliance Industries
Successor: No member of her family is named in a Koch executive role in the cited sources; Charles Koch is chairman and co-CEO with Dave RobertsonChase Koch is an executive vice president of Koch; 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: None found; 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.