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© 2026 StockSpill. Data from SEC EDGAR filings. Logos by Parqet.

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Home › Superinvestors › Bill Ackman › vs Leopold Aschenbrenner

Bill Ackman vs Leopold Aschenbrenner

Side-by-side comparison of two superinvestors' latest disclosed 13F portfolios — what they agree on, where they part ways.

Bill Ackman
Picks: +4.7% (1Y)
Leopold Aschenbrenner
Picks: +40.4% (1Y)

Shared holdings (top 25)

StockBill Ackman %Leopold Aschenbrenner %
No shared positions.

Biggest disagreements

Only in Bill Ackman's book
  • UBER TECHNOLOGIES INC12.7%
  • BROOKFIELD CORP12.6%
  • MICROSOFT CORP11.9%
  • AMAZON COM INC10.5%
  • HOWARD HUGHES HOLDINGS INC10.2%
  • RESTAURANT BRANDS INTL INC9.6%
  • META PLATFORMS INC9.2%
  • VISA INC5.8%
Only in Leopold Aschenbrenner's book
  • SANDISK CORP28.0%
  • MICRON TECHNOLOGY INC27.5%
  • BLOOM ENERGY CORP9.4%
  • TAIWAN SEMICONDUCTOR MANUFAC6.2%
  • NEBIUS GROUP N.V.6.1%
  • COREWEAVE INC3.7%
  • CORE SCIENTIFIC INC NEW3.3%
  • STMICROELECTRONICS2.9%
Profile
Bill Ackman →
Pershing Square Capital Management, L.P. · $19.47B
Picks: +4.7% (1Y)
Profile
Leopold Aschenbrenner →
Situational Awareness LP · $20.24B
Picks: +40.4% (1Y)

More comparisons & related to Bill Ackman

Compare with other superinvestors

  • Bill Ackman vs Warren Buffett
  • Bill Ackman vs Leopold Aschenbrenner
  • Bill Ackman vs George Soros
  • Bill Ackman vs Ray Dalio

Other superinvestors

  • Warren Buffett
  • Leopold Aschenbrenner
  • George Soros
  • Ray Dalio
  • Michael Burry
  • Mohnish Pabrai

By investing strategy

  • Value investors
  • Quality compounders
  • Concentrated portfolio investors

Bill Ackman vs Leopold Aschenbrenner: 13F overlap

Bill Ackman runs Pershing Square Capital Management, L.P. ($19.47B disclosed). Leopold Aschenbrenner runs Situational Awareness LP ($20.24B disclosed). They share 0 common positions, with 14 names unique to Bill Ackman's book and 26 unique to Leopold Aschenbrenner's book.

Use the tables above to spot conviction overlaps (where both managers go large on the same name) and contrarian disagreements (where one is buying while the other has nothing).

Key takeaways

  • 0 shared positions.
  • Bill Ackman-only: 14 names.
  • Leopold Aschenbrenner-only: 26 names.
Home › Superinvestors › Bill Ackman › vs Leopold Aschenbrenner

Bill Ackman vs Leopold Aschenbrenner

Side-by-side comparison of two superinvestors' latest disclosed 13F portfolios — what they agree on, where they part ways.

Bill Ackman
Picks: +4.7% (1Y)
Leopold Aschenbrenner
Picks: +40.4% (1Y)

Shared holdings (top 25)

StockBill Ackman %Leopold Aschenbrenner %
No shared positions.

Biggest disagreements

Only in Bill Ackman's book
  • UBER TECHNOLOGIES INC12.7%
  • BROOKFIELD CORP12.6%
  • MICROSOFT CORP11.9%
  • AMAZON COM INC10.5%
  • HOWARD HUGHES HOLDINGS INC10.2%
  • RESTAURANT BRANDS INTL INC9.6%
  • META PLATFORMS INC9.2%
  • VISA INC5.8%
Only in Leopold Aschenbrenner's book
  • SANDISK CORP28.0%
  • MICRON TECHNOLOGY INC27.5%
  • BLOOM ENERGY CORP9.4%
  • TAIWAN SEMICONDUCTOR MANUFAC6.2%
  • NEBIUS GROUP N.V.6.1%
  • COREWEAVE INC3.7%
  • CORE SCIENTIFIC INC NEW3.3%
  • STMICROELECTRONICS2.9%
Profile
Bill Ackman →
Pershing Square Capital Management, L.P. · $19.47B
Picks: +4.7% (1Y)
Profile
Leopold Aschenbrenner →
Situational Awareness LP · $20.24B
Picks: +40.4% (1Y)

More comparisons & related to Bill Ackman

Compare with other superinvestors

  • Bill Ackman vs Warren Buffett
  • Bill Ackman vs Leopold Aschenbrenner
  • Bill Ackman vs George Soros
  • Bill Ackman vs Ray Dalio

Other superinvestors

  • Warren Buffett
  • Leopold Aschenbrenner
  • George Soros
  • Ray Dalio
  • Michael Burry
  • Mohnish Pabrai

By investing strategy

  • Value investors
  • Quality compounders
  • Concentrated portfolio investors

Bill Ackman vs Leopold Aschenbrenner: 13F overlap

Bill Ackman runs Pershing Square Capital Management, L.P. ($19.47B disclosed). Leopold Aschenbrenner runs Situational Awareness LP ($20.24B disclosed). They share 0 common positions, with 14 names unique to Bill Ackman's book and 26 unique to Leopold Aschenbrenner's book.

Use the tables above to spot conviction overlaps (where both managers go large on the same name) and contrarian disagreements (where one is buying while the other has nothing).

Key takeaways

  • 0 shared positions.
  • Bill Ackman-only: 14 names.
  • Leopold Aschenbrenner-only: 26 names.