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Guy Spier · Aquamarine Zurich Ag

Period:Q1 2026
Portfolio date:Mar 31, 2026
No. of stocks:7
Portfolio value:$135M
CIK 0001953324·SEC EDGAR
Quarter:Q1 2026· latestQ4 2025Q3 2025Q2 2025Q1 2025
Stock% of PortfolioRecent ActivitySharesReported Price *ValueCurrent Price+/- Reported Price52 Week Low52 Week High
BRK-B · Berkshire Hathaway Inc. Del34.5797,600$479.20$46,770,000$475.94-0.68%$455.19$520.30
BRK-A · Berkshire Hathaway Inc. Del15.9230$718133.33$21,544,000$717387.00-0.10%$685150.00$779853.00
MA · Mastercard Inc.14.7740,000$499.65$19,986,000$495.48-0.83%$480.50$601.77
AXP · American Express Co.14.5365,000$302.48$19,661,000$316.03+4.48%$281.46$387.49
MCO · Moodys Corp.8.7127,000$436.26$11,779,000$451.32+3.45%$402.28$546.88
RACE · Ferrari N V7.4030,000$333.87$10,016,000$339.69+1.74%$312.51$519.10
DJCO · Daily Journal Corp.4.1011,500$482.35$5,547,000$500.97+3.86%$348.63$674.75
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held. Price columns + 52-week range are placeholders pending v2 price-data feed.
Sector % analysis
3 sectors represented
Financial Services
88.50
Consumer Cyclical
7.40
Technology
4.10
Whales with similar holdings to Guy Spier
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Tom Gayner · Markel Group Inc.5$1.9BCompare →
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Mairs and Power · Mairs & Power Inc.4$76MCompare →
Warren Buffett · Berkshire Hathaway Inc.3$71.0BCompare →
Chuck Akre · Akre Capital Management LLC3$2.6BCompare →
Articles & Commentaries
Coming soon
Curated press + commentary about Guy Spier arrives in v2 — interviews, shareholder-letter highlights, and 13D/13G activist filings auto-aggregated from public sources.
Real-time alerts. We'll let you know when a whale you follow files a new 13F, or a stock you follow has insider activity. No weekly digest.
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★ WatchlistData from SEC EDGAR · whalstreet.com