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Guy Spier - Aquamarine Capital

As of Q2 2026, Guy Spier reported 7 long-equity positions worth $144.09M in aggregate.

Copy-investor backtest

Latest quarter
+3.96%
1-year
+13.66%
3-year
+68.33%
5-year
+72.54%
3-year vs S&P 500
+0.40%
5-year vs S&P 500
+0.56%
5-year top 5
+65.63%

Return from mechanically copying the disclosed 13F equity portfolio after each filing and rebalancing at the next. The vs S&P 500 figures subtract SPY over that manager's own rebalance dates, so both sides cover the same days; both are price return, excluding dividends. Method & limitations.

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Updated 2026-06-06 from SEC 13F data.

Live quotes available for 6 of 15 rows. Rows without a quote are marked unavailable.

1FCAUFIAT CHRYSLER AUTOMOBILES N16.37%-2,000,000$29.09MNo quoteNo quote
2BRK/BBERKSHIRE HATHAWAY INC DELCUSIP 08467070216.16%-140,600$28.71MNo quoteNo quote
3AXPAMERICAN EXPRESS CO11.93%-222,430$21.2M$95.32No quote
4RACEFERRARI N V11.20%-200,000$19.91M$99.53No quote
5GMWSBGENERAL MTRS CO8.83%-1,000,000$15.69MNo quoteNo quote
6BACBANK AMER CORP8.18%-590,000$14.54M$24.64No quote
7MAMASTERCARD INCORPORATED6.98%-65,750$12.4M$188.65No quote
8BRK/ABERKSHIRE HATHAWAY INC DELCUSIP 0846701085.17%-30$9.18MNo quoteNo quote
9SRGSERITAGE GROWTH PPTYS4.80%Add +23.4%263,869$8.53MNo quoteNo quote
10WFCWELLS FARGO CO NEW3.94%Add +31.9%151,741$6.99M$46.08No quote
11BACWSABANK AMER CORP2.31%-320,000$4.11MNo quoteNo quote
12MCOMOODYS CORP1.97%-25,000$3.5M$140.04No quote
13TERPTERRAFORM PWR INC1.46%-231,183$2.59MNo quoteNo quote
14TOOTEEKAY OFFSHORE PARTNERS L P0.68%-1,000,000$1.21MNo quoteNo quote
15WFCWSWELLS FARGO CO NEW-Sold0$0No quoteNo quote