Role: Sole member/owner; Gates' private investment vehicle (Kirkland, WA)
Stake: 100% (Gates beneficial owner through Cascade membership per 13D filings)
Stake as of: 2026-09-09

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TerraPower (advanced nuclear; Natrium reactor)Founder and chairman

Role: Founder and chairman; invested >$1B over ~two decades (Forbes)

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Breakthrough Energy (clean-energy investment platform incl. Breakthrough Energy Ventures)Founder

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MicrosoftMSFT · Nasdaq · Co-founder · Below 1% (Forbes) · as of Sep 2026 · $497.93 ▼ 0.53%

Ticker: MSFT
Exchange: Nasdaq
Role: Co-founder (1975); left board in 2020
Stake: Below 1% (Forbes)
Stake as of: 2026-09-24

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Four Seasons Hotels and ResortsMajority owner via Cascade · 71.25% · as of Jan 2022

Role: Majority owner via Cascade (bought half of Kingdom Holding's stake for $2.21B in 2021)
Stake: 71.25% (Cascade) - as of Jan 2022, older data
Stake as of: 2022-01

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Stakes

Republic Services (via Cascade)RSG · 37.9% · as of Sep 2026 · $212.72 ▼ 0.18%

Ticker: RSG
Stake: 37.9% (116,166,330 shares); ~117.06M shares after Sept 10-11, 2026 purchases
Stake as of: 2026-09-04

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AutoNation (via Cascade)AN · 21.1% · as of May 2026 · $162.89 ▼ 1.31%

Ticker: AN
Stake: 21.1% (7,062,629 shares; rise due to buybacks, not purchases)
Stake as of: 2026-05-05

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FEMSA - Fomento Económico Mexicano ADSs (via Cascade)FMX · 27,887,350 ADSs = 3.1% of… · as of Mar 2026 · $117.71 ▼ 1.68%

Ticker: FMX
Stake: 27,887,350 ADSs = 3.1% of Series B, 14.0% of Series D-B and D-L shares
Stake as of: 2026-03-31

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Berkshire Hathaway (Gates Foundation Trust)BRK.B · 14,689,844 shares (~$7.35B)… · as of Jun 2026 · $505.18 ▼ 0.39%

Ticker: BRK.B
Stake: 14,689,844 shares (~$7.35B), largest 13F holding
Stake as of: 2026-06-30

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Caterpillar (Gates Foundation Trust)CAT · 6,353,614 shares (~$6.77B) · as of Jun 2026 · $805.25 ▼ 0.83%

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Canadian National Railway (Gates Foundation Trust)CNI · 51,826,786 shares (~$6.18B) · as of Jun 2026 · $119.92 ▲ 0.36%

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Waste Management (Gates Foundation Trust)WM · 26,720,744 shares (~$5.96B) · as of Jun 2026 · $207.96 ▲ 0.04%

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Deere & Co. (Gates Foundation Trust)DE · 3,557,378 shares (~$2.26B) · as of Jun 2026 · $694.94 ▼ 2.05%

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Ecolab (Gates Foundation Trust; Cascade also a major holder per Forbes)ECL · 5,218,044 shares (~$1.45B) in… · as of Jun 2026 · $275.37 ▼ 0.49%

Ticker: ECL
Stake: 5,218,044 shares (~$1.45B) in the Trust
Stake as of: 2026-06-30

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Other Gates Foundation Trust 13F holdings: Walmart, FedEx, Coca-Cola FEMSA, Waste Connections, Home Depot, Madison Square Garden Sports, Coupang, Schrodinger, PACCAR, AB InBev and others (total ~$33.7B); no Microsoft position in Q2 2026 13Fas of Jun 2026

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The Mexico Fund (Gates Foundation Trust)MXF · 4.5% · as of Jun 2026 · $20.69 ▼ 1.19%

Ticker: MXF
Stake: 4.5% (647,198 shares)
Stake as of: 2026-06-30

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Investment vehicles

Cascade Investment, L.L.C.family office · CIK 0001052192

Type: family office
Notes: Gates' private investment office; files 13D/Form 4 (RSG, AN, FMX). EDGAR shows historical 13F-HR/13F-NT filings but none among its 25 most recent filings.

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Gates Foundation Trusttrust · CIK 0001166559 · Files 13F

Type: trust
Notes: Holds the Gates Foundation endowment; Gates is trustee. Files quarterly 13F-HR (latest filed 2026-08-14 for Q2 2026, ~$33.7B reported).

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Gates Foundation (SEC filer entity)trust · CIK 0001663801

Type: trust
Notes: Separate EDGAR registrant name 'Gates Foundation'; filing types not reviewed.

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Cottonwood Management LLC / Cottonwood Ag (farmland holding entities)holding co

Type: holding co
Notes: Shell companies through which Cascade holds US farmland.

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Private deals

Cascade bought 3,762,705 Republic Services shares in open market Aug 20 - Sept 8, 2026 (stake to 37.9%), plus 580,790…Sep 2026

In full: Cascade bought 3,762,705 Republic Services shares in open market Aug 20 - Sept 8, 2026 (stake to 37.9%), plus 580,790 more on Sept 10-11, 2026 at ~$221-224
Date: 2026-09

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Cascade bought 1,599,643 Republic Services shares in 60 days to Aug 19, 2026 (stake 36.7%)Aug 2026

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Cascade filed a new Schedule 13D on AutoNation (Feb 10, 2026)Feb 2026

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TerraPower raised $650M funding roundJun 2025

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Korea Hydro & Nuclear Power joined TerraPower's investors; Meta agreed to a deal for up to 8 Natrium plants (Jan 9…Jan 2026

In full: Korea Hydro & Nuclear Power joined TerraPower's investors; Meta agreed to a deal for up to 8 Natrium plants (Jan 9, 2026)
Date: 2026-01

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Real estate

Medina, Washington (Lake Washington)Primary residence estate (~66,000 sq… · long-held

Type: Primary residence estate (~66,000 sq ft; assessed $147.5M in 2009 - old)
Date: long-held

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19 US statesFarmland (~242,000 acres; largest… · accumulated mainly 2010s-2021

Type: Farmland (~242,000 acres; largest private US farmland owner) via Cascade
Date: accumulated mainly 2010s-2021
Via: Cascade Investment / Cottonwood entities

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Trophies

Codex Leicester (Leonardo da Vinci manuscript), bought at Christie's New York in Nov 1994 for $30.8M

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Four Seasons Hotels and Resorts majority stake via Cascade (71.25% as of 2022)

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Legal & regulatory

NRC approved TerraPower's Natrium construction permit (Mar 4, 2026); construction began in Kemmerer, Wyoming (Apr 23…

In full: NRC approved TerraPower's Natrium construction permit (Mar 4, 2026); construction began in Kemmerer, Wyoming (Apr 23, 2026)

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TerraPower's Natrium reactor accepted into UK regulatory process (Feb 2026); TerraPower UK launched and GDA Step 1…

In full: TerraPower's Natrium reactor accepted into UK regulatory process (Feb 2026); TerraPower UK launched and GDA Step 1 started (June 16, 2026)

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Gates Foundation to wind down and close on Dec 31, 2045 (announced May 2025)

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Giving

Bill & Melinda Gates Foundation (Gates Foundation), Seattle; Gates sole chair; endowment ~$92B at June 30, 2026 (unaudited)EIN 56-2618866

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Gates Foundation Trust, Kirkland WA (endowment asset trust)EIN 91-1663695

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Research gaps: Session WebSearch budget exhausted; profile built from SEC EDGAR, company/foundation sites, ProPublica, Forbes and Wikipedia. Not verified: current Four Seasons ownership after 2022 (possible later Cascade/Kingdom transactions unverified), Cascade's current Canadian National/Deere/Ecolab direct stakes (only Trust 13F positions shown), Heineken stake, Signature Aviation, recent real-estate purchases (e.g., California/Wyoming reports) and farmland acreage as of 2025-2026, Breakthrough Energy 2025 restructuring, exact Microsoft share count. Cascade 13F status unclear (historical 13F filings only). Gates Foundation 2045 closure sourced to Wikipedia (Forbes also notes the 20-year shutdown).

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

What to watch

Continued Cascade open-market buying of Republic Services (near-daily Form 4s Aug-Sept 2026; stake ~38%)

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Gates Foundation Trust Q3 2026 13F-HR (due ~45 days after quarter end, mid-Nov 2026)Nov 16, 2026

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TerraPower Natrium supply-chain contracts, Meta deal execution and UK GDA progress

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Buffett ended his decades-long giving partnership with the Gates Foundation (July 2026) - implications for Trust's…

In full: Buffett ended his decades-long giving partnership with the Gates Foundation (July 2026) - implications for Trust's Berkshire holdings

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