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Guy Spier · Aquamarine Zurich Ag

Period:Q2 2025
Portfolio date:Jun 30, 2025
No. of stocks:14
Portfolio value:$310M
CIK 0001953324·SEC EDGAR
Quarter:Q1 2026· latestQ4 2025Q3 2025Q2 2025Q1 2025
Viewing historical Q2 2025 data. Holdings + moves reflect that quarter — not current.← Back to latest
Stock% of PortfolioRecent ActivitySharesReported Price *ValueCurrent Price+/- Reported Price52 Week Low52 Week High
BRK-B · Berkshire Hathaway Inc. Del22.04140,600$485.77$68,299,000$475.94-2.02%$455.19$520.30
AXP · American Express Co.21.62210,000$318.98$66,986,000$316.03-0.93%$281.46$387.49
MA · Mastercard Inc.11.9265,750$561.95$36,948,000$495.48-11.83%$480.50$601.77
BAC · Bank America Corp.11.73767,845$47.32$36,334,000$51.31+8.43%$42.35$57.55
RACE · Ferrari N V8.0660,000$416.10$24,966,000$339.69-18.36%$312.51$519.10
MU · Micron Technology Inc.7.96200,000$123.25$24,650,000$746.79+505.91%$90.93$747.21
BRK-A · Berkshire Hathaway Inc. Del7.0630$728800.00$21,864,000$717387.00-1.57%$685150.00$779853.00
MCO · Moodys Corp.4.3727,000$501.59$13,543,000$451.32-10.02%$402.28$546.88
BABA · Alibaba Group Holding Limited1.7447,500$113.41$5,387,000$140.06+23.50%$103.71$192.67
DJCO · Daily Journal Corp.1.5711,500$422.26$4,856,000$500.97+18.64%$348.63$674.75
GOOGL · Alphabet Inc.0.9116,000$176.25$2,820,000$400.71+127.35%$156.16$402.00
81752R100 · Seritage Growth Pptys0.50500,000$3.08$1,540,000
AMR · Alpha Metallurgical Resour I0.298,000$112.50$900,000$184.11+63.65%$97.41$253.82
CNR · Core Natural Resources Inc.0.2410,740$69.74$749,000$84.91+21.75%$64.15$114.80
* 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
7 sectors represented
Financial Services
78.74
Consumer Cyclical
9.80
Technology
9.52
Communication Services
0.91
Unclassified
0.50
Basic Materials
0.29
Energy
0.24
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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