Billionaire Bill Gates Has 59% of His Foundation's $38 Billion Portfolio Invested in 3 Outstanding Stocks

The Gates Foundation’s marketable-equity portfolio is highly concentrated, with roughly 59% held in three names: Berkshire Hathaway (28.5% — 21.8M shares, ≈$11B), Waste Management (17% — 28.9M shares, ≈$6.6B) and Canadian National Railway (13.3% — 51.8M shares, ≈$5.1B). Operationally, Berkshire’s insurance underwriting earnings were up 3% through the first nine months of 2025 and the stock trades near 1.55x book; WM reported a 31.5% adjusted operating margin in 2025 (from 30% in 2024), expects ~5.2% revenue growth at the 2026 midpoint and trades at a forward P/E ~27.5; CN posted 2% revenue growth in 2025, guides to flat 2026 revenue, authorized a repurchase of up to 24M shares (~3.9% outstanding) and cut 2026 capex to $2.8B (‑15%). The positioning underscores a Buffett-influenced, defensive/value bias toward durable-moat, cash-generative businesses — relevant for long-only allocation decisions but unlikely to be broadly market-moving.

Analysis

Market structure: The Gates Foundation concentration (≈59% in BRK.B/WM/CNI) reinforces capital demand for large-cap, cash-generative, regulated/asset-heavy names and reduces effective free float in those tickers; that props up prices and reduces realized volatility absent forced sales. Winners: BRK.B (insurance/portfolio exposure), WM (landfill pricing power), CNI (network effects, buybacks). Losers: smaller regional waste/rail peers and capital-intensive growth names that compete for industrial capex and freight volumes.

Risk assessment: Tail risks include regulatory shocks (environmental restrictions or antitrust in waste/rail), operational catastrophes (California wildfires hurting Berkshire underwriting) and forced liquidations tied to annual donation/payout rules; a 10-20% forced-sale overhang in BRK.B within a 6–12 month window is plausible if donations accelerate. Short term (days–weeks): muted moves unless large gift sale announced; medium term (3–12 months): earnings guidance, fuel costs, and buyback cadence will drive performance; long term: compounding under stable margins.

Trade implications: Direct plays favor selective long CNI and WM on pullbacks while limiting BRK.B new exposure — use EV/EBITDA <12 or WM forward P/E <22 as buy thresholds. Options: sell 30–60 day 5% OTM puts on CNI to accumulate at better bases or buy 9–12 month calls on WM if operational margin expansion executes. Rotate capital from high-valuation growth into Industrials/Materials and defensives; rebalance if rates fall >50bp which would re-rate long-duration names.

Contrarian angles: Consensus underestimates the liquidity risk from large philanthropic holders — concentrated ownership can both depress upside and create episodic volatility, a tradable event. Also overlooked is WM’s WM Healthcare Solutions upside (margin expansion runway of >500 bps possible over 24 months) and CNI’s buyback flexibility if capex cuts persist; downside is regulatory/policy shocks (tariffs, labor) that could compress IRRs quickly.

Key Decisions for Investors

• Establish a 2–3% portfolio long position in CNI today (target 12–24 month hold); if CNI pulls back 8–12% or EV/EBITDA falls below 11, scale to 4–5%. Consider selling 30–60 day 5% OTM cash-secured puts to collect premium and/or buy 9–12 month 25–35 delta calls to lever upside (limit options exposure to 0.5–1% notional).
• Take a tactical 1–2% long position in WM on weakness; only initiate if shares decline ≥10% or forward P/E drops below 22. Alternatively buy 12-month ATM calls sized to 0.5–1% of portfolio if management hits +100–200 bps margin expansion within next 12 months.
• Do not initiate >2% new BRK.B exposure given donation-driven float risk; if already long, sell 75–90 day 5–10% OTM covered calls to monetize and cap upside. If concerned about a donation-driven sell-off, buy 3–6 month protective puts (cost-limit 0.5% of portfolio).
• Establish a pair trade: long WM (1%) / short RSG (Republic Services) (1%) to capture expected margin outperformance and pricing power; rebalance if relative spread reverses by >6% within 90 days. Monitor regulatory filings and Buffett donation announcements closely — any declared large gift (≥5M BRK.B shares) is a prompt to tighten risk limits and reassess positions.