Guy Spier's Aquamarine Capital holds 65K shares of American Express Company (AXP) worth about $19.8M as of September 30, 2026, according to the 13F-HR filed with the SEC on November 10, 2026. The position is 13.7% of the reported portfolio, the 4th largest of 7 stock positions. Guy Spier left the share count unchanged from the prior quarter.
What did the 2026 Q3 filing report for AXP?
As of September 30, 2026, from the 13F-HR filed November 10, 2026.
| Value | |
|---|---|
| Portfolio weight | 13.7% |
| Shares | 65K |
| Reported value | $19.8M |
| Rank in portfolio | 4th of 7 |
| Largest holding | BRK-B at 33.66% |
| Top three holdings | 64.49% of the book |
| Change this quarter | unchanged |
How concentrated is Guy Spier in AXP?
AXP at 13.7% is 1 times the average stock position in the Guy Spier portfolio, which is 14%. The largest holding is BRK-B at 33.66%. The three largest stocks together are 64.49% of the reported book. A quarter earlier AXP was 15.26% of the book.
Where does AXP sit in the Guy Spier portfolio?
AXP ranks 4th of 7 stock positions in the Guy Spier portfolio at 13.7%, about the fund's average stock position of 14%. Across the 2026 Q3 portfolio, Guy Spier reported 7 stock positions, with no position opened or closed. The total portfolio value is about $144M, little changed from the prior quarter.
How long has Guy Spier held AXP?
Guy Spier first reported AXP in the quarter ended December 31, 2014. The weight peaked at 21.98% in 2025 Q3. The share count was unchanged the quarter before. Every reported trade is on the Guy Spier AXP trade history page.
Did other funds buy or sell AXP in 2026 Q3?
Among the other tracked funds that had filed for 2026 Q3 as of November 10, 2026, 2 hold AXP. The largest sellers were Tweedy, Browne Co All Funds (US) and Lindsell Train. Every tracked holder of AXP is on the AXP ownership page.
FAQ
What share of the Guy Spier portfolio is AXP?
AXP is 13.7% of the Guy Spier portfolio as of 2026 Q3, the 4th largest of 7 stock positions.
What is the AXP stake of Guy Spier worth?
Guy Spier holds 65K shares of AXP, worth about $19.8M at September 30, 2026 prices, 13.7% of the reported portfolio.
What are the largest holdings of Guy Spier?
The largest stock positions of Guy Spier as of 2026 Q3 are BRK-B (33.66%), BRK-A (15.53%) and MA (15.29%), together 64.49% of the book.
Did Guy Spier's Aquamarine Capital change its AXP position in 2026 Q3?
Guy Spier left the share count unchanged from the prior quarter.