What did Guy Spier buy in Q4 2025?

Guy Spier disclosed no new buys in the Q4 2025 13F.

What did Guy Spier sell in Q4 2025?

Guy Spier exited 7 positions (BAC, MU, BABA, GOOGL, SRG) and trimmed 4.

What Guy Spier bought and sold in Q4 2025

In Q4 2025, Guy Spier (Aquamarine Capital) trimmed 4, exited 7 (BAC, MU, BABA). The book stood at $148M across 7 positions, filed Jan 15, 2026.

0New0Added4Trimmed7Exited

Share𝕏 in

Trimmed (4)

BRK/BBerkshire Hathaway Inc-cl B-31% shares · 33.3% · $49M
AXPAmerican Express CO-69% shares · 16.3% · $24M
MAMastercard Inc - A-39% shares · 15.5% · $23M
RACEFerrari N V-50% shares · 6.5% · $10M

Exited (7)

BACBank OF America Corpwas 12.5% of book
MUMicron Technology Incwas 4.2% of book
BABAAlibaba Group Holding-sp Adrwas 2.7% of book
GOOGLAlphabet Inc-cl Awas 1.2% of book
SRGSeritage Growth Prop- Awas 0.7% of book
AMRAlpha Metallurgical Resourcewas 0.4% of book
CNRCore Natural Resources Incwas 0.3% of book

Guy Spier's other filings

Q3 2025 changes Q1 2025 changes

Guy Spier's full portfolio →The whole cohort in Q4 2025 →

Changes vs the prior quarter's 13F, long US equity positions only (no shorts, options, or non-US listings). ADD/TRIM are share- count changes of ±20% or more. Sourced from SEC EDGAR. Not investment advice.