Bill Ackman
Hedge fundRuns Pershing Square's concentrated book. Few positions, held for years, argued in public.
Bill Ackman runs Pershing Square Capital Management, L.P., a concentrated book of 11 stocks worth $13.7B as of Q1 2026 (disclosed May 15, 2026, a ~45-day 13F lag). The Q2 2026 filing is not on record yet. This quarter they opened Microsoft Corp and trimmed Brookfield Corp. Their largest long position is Brookfield Corp at 18% of the equity book.
- Brookfield Corp−2.8%
- Uber Technologies Inc−0.8%
- Restaurant Brands Intern−1.0%
+3 more · largest first
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Concentration
Top-heavy: concentrated book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
Direct sector allocation
100% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Biggest moves: latest quarter
Estimated $ traded · quarter-end prices (an exit at the prior quarter-end), no cost basis
- Microsoft CorpMSFT▲New$2.1B
- Amazon.com IncAMZN▲+19%$384.1M
- ▼−95%$1.7B
- ▼−100%$870.0M
- Alphabet Inc-CL AGOOGL▼−95%$185.7M
- ▼−2.8%$69.0M
- ▼−0.8%$17.9M
- ▼−1.0%$16.4M
Top holdings
11 companies · Q1 2026 · click a row for its quarter-by-quarter history
| # | Stock | % of book | Value | Shares | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Brookfield CorpBN | 17.6% | $2.4B | 59.7M | ▼−2.8% Reduced · −1.7M sh | |
| 2 | Amazon.com IncAMZN | 17.4% | $2.4B | 11.5M | ▲+19% Added · +1.8M sh | |
| 3 | Uber Technologies IncUBER | 15.7% | $2.2B | 30.0M | ▼−0.8% Reduced · −249K sh | |
| 4 | Microsoft CorpMSFT | 15.3% | $2.1B | 5.7M | ▲New +5.7M sh | |
| 5 | Restaurant Brands InternQSR | 12.2% | $1.7B | 22.6M | ▼−1.0% Reduced · −221K sh | |
| 6 | Meta Platforms Inc-Class AMETA | 11.1% | $1.5B | 2.7M | ▼−0.5% Reduced · −13K sh | |
| 7 | Howard Hughes Holdings IncHHH | 8.7% | $1.2B | 18.9M | —Held | |
| 8 | Seaport Entertainment GroupSEG | 0.8% | $107.9M | 5.0M | —Held | |
| 9 | Alphabet Inc-CL CGOOG | 0.7% | $89.4M | 312K | ▼−95% Reduced · −5.9M sh | |
| 10 | Hertz Global Hldgs IncHTZ | 0.5% | $70.3M | 15.2M | —Held | |
| 11 | Alphabet Inc-CL AGOOGL | 0.1% | $9.3M | 32K | ▼−95% Reduced · −646K sh | |
| 12 | Hilton Worldwide Holdings InHLT | 0.0% | $0 | — | ▼−100% Exited |
Funds
1 vehicle
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Use Arkolith to show Bill Ackman's latest 13F book, the biggest position changes this quarter, and the filing each one comes from.
Aggregated from SEC Form 13F filings (institutional long equity positions, reported quarterly, up to 45 days after quarter-end). Holdings are public domain, sourced to SEC EDGAR. The book totals, weighting, concentration and sectors are long equity only; disclosed put/call options are listed separately and excluded from those figures. No performance line is shown for this book yet. Every panel is one call to the Arkolith API & MCP server. Portrait via Wikimedia Commons (Senate Democrats, CC BY 2.0).