People · #4 of 100 Net worths as of Sep 24, 2026
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Read the moves of the world's 100 richest like a trading desk
#4 of 100 · AI & tech

Mark Zuckerberg

Facebook
Net worth
$266.4B
Forbes Real-Time · as of Sep 24, 2026
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Latest moves

Mark ZuckerbergProduct launchAI & techMETAAI read · ▲ Bullish

Meta stock jumps 11% in a day on Muse AI buzz

The move

Meta shares rose 11% in a single day and closed near a 52-week high after its Muse AI assistant, launched September 8, topped app-store charts with more than 2.5 million downloads. The move added over $100 billion to Meta's market cap, pushing its value close to $1.9 trillion.

Why it matters

Muse becoming a hit app is the market's first real evidence that Meta's massive AI spending can show up in a product people actually use, not just in ad-targeting algorithms.

The bear case

Most Muse features are still free, and it's unproven whether app-store buzz and downloads convert into paying subscribers at Meta's $20 or $100 monthly tiers.

What to watch

Whether Muse subscription uptake shows up in Meta's next earnings report.

Source · The Motley FoolRead original ↗Report an error
Mark ZuckerbergProduct launchAI & techMETAAI read · ▲ Bullish · new revenue model

Zuckerberg turns Meta's AI agent into a toll booth

The move

At Meta Connect's Sept. 23-24 sessions, Zuckerberg said Muse, Meta's AI agent, will stay free for a large number of tokens, then earn Meta a small fee on transactions it completes. Meta added PayPal support and shopping integrations with Walmart, Best Buy, Gap, Sephora, Wayfair and American Eagle, plus travel booking through Expedia and grocery orders via Instacart.

Why it matters

Meta is betting that owning the AI agent people shop through is worth more than ad revenue alone. The fee comes from merchants, not users, so wider Muse adoption compounds directly into Meta's revenue.

The bear case

The model depends on people trusting an AI agent to spend money on their behalf, and Meta hasn't said what the fee will be or when it starts.

What to watch

How many retailers and users actually adopt Muse checkout once it leaves the keynote stage.

Recent SEC filings

SEC filings · last 90 days

Zuckerberg Mark · filed Sep 24, 2026
Chan Zuckerberg Initiative, LLC · filed Aug 14, 2026
Converted 592K METAGifted 592K METAGifted 592K META
Zuckerberg Mark · filed Aug 4, 2026

Form 4 insider trades post within 2 business days. 13F fund holdings can arrive 45 days after quarter end. New to filings? Read Filings 101.

Footprint

Companies

Meta Platforms, Inc. (Facebook, Instagram, WhatsApp)META · Nasdaq · Founder, Chairman and CEO · 341,823,978 Class B shares… · as of Apr 2026 · $777.59 ▲ 4.50%
More
Ticker
META
Exchange
Nasdaq
Role
Founder, Chairman and CEO
Stake
341,823,978 Class B shares (99.8% of Class B) plus 639,347 Class A; 60.8% of total voting power
Stake as of
2026-04-01
source ↗

Investment vehicles

Chan Zuckerberg Initiative, LLCfund · CIK 1997453 · Files 13F
More
Type
fund
Notes
Philanthropic LLC (Redwood City); files 13F-HR (latest for Q2 2026 filed Aug 14, 2026 listed one holding, an iShares ETF, ~$58.5M)
source ↗
CZI Holdings, LLC and Chan Zuckerberg Holdings (I-V) LLCsholding co
More
Type
holding co
Notes
Hold of record most of Zuckerberg's Meta Class B shares (e.g., 109.4M via CZI Holdings; 50M each via CZ Holdings II-V)
source ↗
The Mark Zuckerberg Trust (dated July 7, 2006)trust
More
Type
trust
Notes
Holds 3,388,097 Meta Class B shares of record
source ↗

Private deals

Form 144 notice to sell 27,474 Meta Class A shares (~$21.4M) under 10b5-1 plan adopted Jan 31, 2026Sep 2026
source ↗
Meta agreed to acquire AI agent startup Manus for ~$2B (China reviewed the deal, Jan 2026)Dec 2025
source ↗

Real estate

Indian Creek Village, Miami-Dade County, FLUnfinished waterfront home, Miami-Dade… · $170M · Mar 2026
More
Type
Unfinished waterfront home, Miami-Dade County record price (asking $200M), bought with Priscilla Chan
Price
170000000
Date
2026-03
source ↗
Kauai, HI110 acres added to ~1,500-acre estate… · $17M · Dec 2021
More
Type
110 acres added to ~1,500-acre estate (Ko'olau Ranch)
Price
17000000
Date
2021-12
source ↗
Kauai, HICumulative land spend of at least… · $145M · 2014-2024
More
Type
Cumulative land spend of at least $145M on ~1,400+ acre retreat (2024 report)
Price
145000000
Date
2014-2024
source ↗
Palo Alto, CA (Crescent Park)Family residential compound · as of 2025
source ↗

Trophies

Superyacht Launchpad (~118 m, Feadship, delivered 2024; ~$300M)
source ↗
Support yacht Wingman (~67 m, Damen, 2014)
source ↗
Kauai ranch raising Wagyu and Angus cattle
source ↗

Legal & regulatory

FTC v. Meta (Instagram/WhatsApp monopolization): court ruled for Meta Nov 18, 2025; FTC appealed Jan 20, 2026
source ↗
New Mexico AG youth-safety case: jury ordered $375M civil penalty (Mar 24, 2026); public nuisance bench trial held May…
More
In full
New Mexico AG youth-safety case: jury ordered $375M civil penalty (Mar 24, 2026); public nuisance bench trial held May 2026, AG seeks $953M abatement plus injunctions - decision pending
source ↗
Social media adolescent addiction litigation: first JCCP bellwether verdict $6M (70% Meta / 30% YouTube, Mar 25, 2026…
More
In full
Social media adolescent addiction litigation: first JCCP bellwether verdict $6M (70% Meta / 30% YouTube, Mar 25, 2026, appealed); MDL state AG trial set for Aug 12, 2026; Tennessee AG trial began Jul 20, 2026; first school-district bellwether settled May 2026
source ↗
EU: EUR 798M Facebook Marketplace antitrust fine (Nov 2024) and EUR 200M DMA 'pay or consent' fine (Apr 2025), both…
More
In full
EU: EUR 798M Facebook Marketplace antitrust fine (Nov 2024) and EUR 200M DMA 'pay or consent' fine (Apr 2025), both under appeal
source ↗
Spain: court awarded ~EUR 542M to 87 news media companies over GDPR-based ad practices (Nov 19, 2025), Meta appealing…
More
In full
Spain: court awarded ~EUR 542M to 87 news media companies over GDPR-based ad practices (Nov 19, 2025), Meta appealing; similar UTECA case trial Oct 2026
source ↗
Flo Health privacy case: jury found Meta liable under California Invasion of Privacy Act (Aug 1, 2025); plaintiffs…
More
In full
Flo Health privacy case: jury found Meta liable under California Invasion of Privacy Act (Aug 1, 2025); plaintiffs seek $5,000 per class member, up to ~1.25M members
source ↗

Giving

Chan Zuckerberg Initiative FoundationEIN 45-5002209
source ↗
Chan Zuckerberg Biohub, Inc.EIN 81-1669175
source ↗

Research gaps: Meta's reported ~$14B Scale AI investment (June 2025) not verified beyond 'talks' reporting, so omitted. Zuckerberg's personal investments outside Meta not found. Washington DC and Lake Tahoe properties not verified. CZI total giving/assets not verified (ProPublica shows ~$6.3B assets for CZI Foundation, 2023). Manus deal date/price sourced via WSJ citation seen on Wikipedia (WSJ not fetchable). Web search budget exhausted during research.

Prices via Finnhub · as of Sep 24, 2026 4:00 PM ET. For information only.

What to watch

Next two user bellwether trials in social media addiction litigationOct 28, 2026
source ↗
Ruling on New Mexico AG public nuisance claim ($953M abatement sought) and outcome of MDL state AG trial (began Aug…
More
In full
Ruling on New Mexico AG public nuisance claim ($953M abatement sought) and outcome of MDL state AG trial (began Aug 2026) and Tennessee AG trial
source ↗
UTECA v. Meta Ireland trial in SpainOct 2026
source ↗
FTC appeal of Meta antitrust ruling (D.C. Circuit)
source ↗
Ongoing Meta share sales under Zuckerberg's 10b5-1 plan (Form 144/Form 4 filings)
source ↗