Latticework

Warren Buffett vs Bill Ackman

Side-by-side 13F comparison as of 2026Q1. Buffett discloses $263.10B across 29 positions; Bill Ackman (Pershing Square Capital Management) discloses $13.71B across 11. They overlap on 2 holdings.

MetricBuffettBill Ackman
Disclosed portfolio$263.10B$13.71B
Positions2911
Top-5 concentration67%78%
Latest filing2026Q1 · May 15, 20262026Q1 · May 15, 2026
Clone vs SPY-3.1%/yr · 12.0y-2.3%/yr · 12.0y

Clone vs SPY: each manager's 13F replicated at reported weights with real disclosure lag, vs SPY total return — windows differ per manager. Methodology.

Buffett's top 10

  1. AAPL22.0%
  2. AXP17.4%
  3. KO11.6%
  4. BAC9.5%
  5. CVX6.6%
  6. OXY6.5%
  7. GOOGL5.9%
  8. CB4.2%
  9. MCO4.1%
  10. KHC2.8%

Bill Ackman's top 10

  1. BN17.6%
  2. AMZN17.4%
  3. UBER15.7%
  4. MSFT15.3%
  5. QSR12.2%
  6. META11.1%
  7. HHH8.7%
  8. SEG0.8%
  9. GOOG0.7%
  10. HTZ0.5%

Where they agree

Shared holdingBuffett wt.Bill Ackman wt.
GOOGL5.9%0.1%
GOOG0.4%0.7%

Where they diverge

Buffett's largest holding that Bill Ackmandoesn't own: AAPL at 22.0% of the book. Bill Ackman's largest holding Buffett doesn't own: BN at 17.6%.

From SEC EDGAR Form 13F-HR filings (2026Q1). Long US-listed equities only — cash, shorts, bonds, and non-US positions are not disclosed, and both managers' real books extend beyond what a 13F shows. Not investment advice.