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Guy Spier — Founder & Managing Partner — portfolio photo

Guy Spier
Portfolio: Top Holdings & Stock Picks

Aquamarine Zurich Ag

Guy Spier (Aquamarine Zurich Ag) disclosed 7 total holdings in its latest 13F filing dated 03/31/2026, with a portfolio value of $135.3 M and a turnover rate of 0.0%.

Portfolio Value
$135.3 M
Total Holdings
7
Latest Filing
Q1 2026
April 17, 2026
Turnover Rate
0%

Guy Spier Top Holdings of Q1 2026

Guy Spier Top Holdings of Q1 2026
Ticker Name Shares Value % of Portfolio Time Held % Change
97,600 $46.77 M 34.57% 9.2 Years 0.00%
30 $21.54 M 15.92% 9.2 Years 0.00%
MA
40,000 $19.99 M 14.77% >10 Years 0.00%
AXP
65,000 $19.66 M 14.53% 9.2 Years 0.00%
MCO
27,000 $11.78 M 8.71% 10 Years 0.00%
30,000 $10.02 M 7.40% 10 Years 0.00%
11,500 $5.55 M 4.10% 4.8 Years 0.00%

Recent Moves

Holding Steady This Quarter

With 0% portfolio turnover, this filing indicates a period of stability. No new positions were initiated, and no existing holdings were sold out.

Last portfolio change reported in Q4 2025.

Guy Spier's Historical Top Holdings Overview

Portfolio Date:

Guy Spier Top Stock Picks

Ticker Name Date Activity Shares Shares Change Value Change
AXP
12/31/2025 Reduce -69.1% 65,000 -145,000 $53.64 M
BAC
12/31/2025 Sold Out 0 -767,845 $39.61 M
12/31/2025 Reduce -30.6% 97,600 -43,000 $21.61 M
MA
12/31/2025 Reduce -39.2% 40,000 -25,750 $14.7 M
MU
12/31/2025 Sold Out 0 -80,000 $13.39 M
12/31/2025 Reduce -50.0% 30,000 -30,000 $9.56 M
12/31/2025 Sold Out 0 -47,500 $8.49 M
12/31/2025 Sold Out 0 -16,000 $3.89 M
SRG
12/31/2025 Sold Out 0 -500,000 $2.12 M
AMR
12/31/2025 Sold Out 0 -8,000 $1.31 M

Guy Spier's Portfolio Sector Breakdown

Portfolio Date:

About Guy Spier

Guy Spier is a Zurich‑based investor, author, and manager of the Aquamarine Fund, modeled after Warren Buffett's early partnerships. Educated at Oxford University and Harvard Business School, he began his career in banking and consulting before dedicating himself to value investing. Spier gained global attention in 2008 when he and Mohnish Pabrai bid $650,100 for a charity lunch with Buffett. He later chronicled his journey in the acclaimed book The Education of a Value Investor.

Frequently Asked Questions

As of 03/31/2026, Guy Spier holds 7 stocks. Top positions include BRK.B, BRK.A, MA, AXP, MCO. For full portfolio details, please visit Guy Spier’s portfolio.

Guy Spier did not initiate any new positions in the latest quarter.

According to the 13F filing for Q1 2026, There is no available data showing what Guy Spier is buying.

Guy Spier's firm may occasionally request confidential treatment under SEC rule 13F-HR, which allows temporary non-disclosure of certain positions.