Zuckerberg vs Brin

Meta Platforms and Alphabet (Google).

The differences

Forbes puts Sergey Brin about $12.5B ahead of Mark Zuckerberg.Forbes figures from date not stated and 22 Sep 2026.
Both started the company their money comes from.
Sergey Brin is about 11 years older than Mark Zuckerberg.
Mark Zuckerberg has signed the Giving Pledge; Sergey Brin has not.

Put someone else on either side

Zuckerberg

Brin

Net worth, Forbes: $253BForbes, 22 Sep 2026; $265BForbes, date not stated
Net worth, Bloomberg: $251BBloomberg, 17 Oct 2026; $271BBloomberg, 16 Oct 2026
Forbes rank: No. 6Real-Time list, 22 Sep 2026; No. 5Real-Time list, 30 Sep 2026
Billionaire since: 2008First on the Forbes World's Billionaires list in 2008, with $1.5 billion; 2004First year on Forbes' billionaires list: the Los Angeles Times reported Brin and Page 'making their debut on the list' in February 2004

How it started: Co-founded itLaunched Facebook in 2004 with Dustin Moskovitz, Chris Hughes and Eduardo Saverin; Meta calls him its founder; Co-founded itFormed Google with Larry Page in 1998
Main source: Meta Platforms stockBloomberg: 'The majority of Zuckerberg's fortune is derived from a stake of about 13% in Meta Platforms'; Alphabet (Google) stockBloomberg: 'The majority of Sergey Brin's fortune is derived from a stake in Alphabet'; Bloomberg also counts $27.9 billion in cash
Companies: Meta PlatformsMeta Platforms: Founder, chairman and CEO; Alphabet (Google)Alphabet (Google): Co-founder, director and Executive Committee member
Biggest stake: Meta Platforms13.5% owned; Alphabet (Google)6% owned

Born: 14 May 1984White Plains, New York, United States; 21 Aug 1973Moscow, Russia
Country: United StatesLives in Palo Alto, California, United States; United StatesLives in Los Altos, California, United States
Education: Left university without a degreeStudied computer science at Harvard University and left without a degree; honorary Harvard degree in 2017; Graduate degreeBS in mathematics and computer science, University of Maryland, College Park; MS in computer science, Stanford University
Parents: His father, Edward, was a dentist with a practice in the family home; his mother, Karen, was a psychiatrist; His father, Michael Brin, was a mathematician and economist; his mother, Eugenia Brin, a NASA scientistCNN; Forbes says the family left Russia because of antisemitism

Giving Pledge: Signed in 2010Pledged with Priscilla Chan; Not a signer
Foundation: Chan Zuckerberg InitiativeCo-founded with Priscilla Chan in 2015; he is co-CEO; Sergey Brin Family Foundation
Lifetime giving: $7.2BChan Zuckerberg Initiative, undefined Oct 2026. CZI's own total of grants committed since 2015 ('over $7.22 billion'); an initiative-wide figure, not a personal estimate; $3.9BForbes, 6 Feb 2025. Forbes' estimate of lifetime charitable giving; more than $1.5 billion of it to Parkinson's research

Role now: Runs the companyFounder, chairman and CEO of Meta Platforms; On the boardAlphabet co-founder, director and member of its Executive Committee
Successor: None namedMeta's proxy says the board oversees CEO succession planning but names no successor, and reports no family relationships among directors or executive officers; Sundar Pichai, Alphabet CEO since December 2019Brin left the Alphabet presidency then; Alphabet reports no family relationships among its directors or executive officers
Public office: Member, President's Council of Advisors on Science and Technology (PCAST)2026-; Member, President's Council of Advisors on Science and Technology (PCAST)2026-
Legal record: None found; None found