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Bill Ackman

Photo: Senate Democrats, CC BY 2.0, via Wikimedia Commons

Bill Ackman

Pershing Square Capital Management · Concentrated activist Pershing Square holds a very concentrated activist book of large-cap North American equities.

Bill Ackman (William Albert Ackman, born 1966) is an American hedge fund manager and the founder and chief executive of Pershing Square Capital Management, which he established in 2004. He is known as an activist investor, taking concentrated positions in public companies and pushing for changes in strategy or management. Notable episodes include a proxy fight at Canadian Pacific Railway and a high-profile $1 billion short bet against Herbalife.

Wikipedia ↗ source: sec.gov

$13.7B reported 13F equity 11 positions as of 2026Q1 13F: latest change 2026-05-15

Showing all 11 reported 13(f) positions; TradingPilot links only the 4 matching its curated universe — a licensed CUSIP↔ticker database was not used. Unmapped positions render as plain text, exactly as filed.

Portfolio allocation (reported 13F equity)

Long US-listed equity positions only; options excluded.

$13.7B13F equity
  • BROOKFIELD CORP17.6%
  • AMZN17.4%
  • UBER TECHNOLOGIES INC15.7%
  • MSFT15.3%
  • RESTAURANT BRANDS INTL INC12.2%
  • META11.1%
  • HOWARD HUGHES HOLDINGS INC8.7%
  • SEAPORT ENTMT GROUP INC0.8%
  • ALPHABET INC0.7%
  • HERTZ GLOBAL HLDGS INC0.5%
  • Others0.1%

Reported 13F equity value — not a return, not AUM

Long US-listed equity positions only; filed with a ~45-day lag.

2023Q2 — $10.8B reported 13F equity2023Q3 — $10.5B reported 13F equity2023Q4 — $10.4B reported 13F equity2024Q1 — $10.8B reported 13F equity2024Q2 — $10.4B reported 13F equity2024Q3 — $12.9B reported 13F equity2024Q4 — $46.5M reported 13F equity2025Q1 — $11.9B reported 13F equity2025Q2 — $13.7B reported 13F equity2025Q3 — $14.6B reported 13F equity2025Q4 — $15.5B reported 13F equity2026Q1 — $13.7B reported 13F equity$15.5B$46.5M2023Q22026Q1
#TickerSecurity (as filed) % of 13FShares Reported priceCurrentValueActivity
1 — BROOKFIELD CORP 17.6% 59,697,208 $40.47 — $2.4B Trimmed −3%
2 AMZN AMAZON COM INC 17.4% 11,451,981 $208.27 $243.79 +17.1% $2.4B Added +19%
3 — UBER TECHNOLOGIES INC 15.7% 29,958,771 $71.93 — $2.2B Trimmed −1%
4 MSFT MICROSOFT CORP 15.3% 5,654,078 $370.17 $530.14 +43.2% $2.1B New
5 — RESTAURANT BRANDS INTL INC 12.2% 22,645,483 $73.90 — $1.7B Trimmed −1%
6 META META PLATFORMS INC 11.1% 2,660,861 $572.13 $624.52 +9.2% $1.5B Trimmed −0%
7 — HOWARD HUGHES HOLDINGS INC 8.7% 18,852,064 $63.26 — $1.2B Held +0%
8 — SEAPORT ENTMT GROUP INC 0.8% 5,023,780 $21.48 — $107.9M Held +0%
9 — ALPHABET INC 0.7% 311,726 $286.86 — $89.4M Trimmed −95%
10 — HERTZ GLOBAL HLDGS INC 0.5% 15,241,127 $4.61 — $70.3M Held +0%
11 GOOGL ALPHABET INC 0.1% 32,376 $287.56 $283.82 -1.3% $9.3M Trimmed −95%
— — HILTON WORLDWIDE HLDGS INC — 0 — — $0 Sold-Out −100%

Reported price = value ÷ shares at the quarter-end — an average, NOT the manager's buy/sell price.

Current shows the stock's price change since the filing quarter-end (mapped names only) — it is the STOCK's move, not the manager's realized return (we don't know their cost basis or whether they still hold).

TradingPilot analysis of the reported 13F equity book

As of 2026Q1, Bill Ackman's reported 13F book holds 11 equity positions; the top 5 are 78% of it.

  1. BROOKFIELD CORP — 17.6% of 13F
  2. AMAZON COM INC (AMZN) — 17.4% of 13F
  3. UBER TECHNOLOGIES INC — 15.7% of 13F
  4. MICROSOFT CORP (MSFT) — 15.3% of 13F
  5. RESTAURANT BRANDS INTL INC — 12.2% of 13F

This quarter: 1 new, 1 added, 6 trimmed, 1 sold out.

Biggest share moves:
  • ALPHABET INC — Trimmed (−5,852,145 sh)
  • HILTON WORLDWIDE HLDGS INC — Sold-Out (−3,028,664 sh)
  • AMAZON COM INC (AMZN) — Added (+1,844,157 sh)
  • BROOKFIELD CORP — Trimmed (−1,705,881 sh)
  • ALPHABET INC (GOOGL) — Trimmed (−645,921 sh)