Thomas Gayner - Markel Group Inc. Portfolio Performance Analysis (Q2 2026)
Investment performance metrics based on historical 13F filings data.
Data Coverage: June 2013 to June 2026 • Initial Portfolio Value: $2.43B
Performance calculated from first filing in our database. This may not represent the investor's entire career.
Portfolio Growth (Since First Filing)
+10.68B
+439.20%
Winning Positions
+81.14%
228 wins / 281 positions
Average Gain (Winners)
$51.69M
+2531.79% avg per position
Active Positions
129
41 losing positions
Portfolio Value Over Time
Total Positions Tracked
281
All holdings over time
Win/Loss Ratio
5.56
228 gains / 41 losses
Active vs. Exited
129 / 152
Current positions / Exited
Position Performance
Performance calculated from first appearance in 13F filings. Initial values represent position value when first tracked, not actual purchase prices.
| Symbol | Company | Sector | Entry | Status | Initial Value | Current Value | Gain/Loss | Return % |
|---|---|---|---|---|---|---|---|---|
| GOOG | Alphabet Inc. | Communication Services | Dec 2015 | ACTIVE | $12.17M | $971.61M | $959.44M | +7886.26% |
| BRK-A | Berkshire Hathaway Inc. | Financial Services | Jun 2013 | ACTIVE | $185.29M | $834.22M | $648.93M | +350.22% |
| BRK-B | Berkshire Hathaway Inc. New | Financial Services | Jun 2013 | ACTIVE | $173.50M | $766.58M | $593.09M | +341.84% |
| DE | Deere & Company | Industrials | Sep 2014 | ACTIVE | $44.27M | $556.88M | $512.60M | +1157.77% |
| AMZN | Amazon.com, Inc. | Consumer Cyclical | Jun 2013 | ACTIVE | $3.00M | $484.01M | $481.01M | +9,999%+ |
| ADI | Analog Devices, Inc. | Technology | Mar 2016 | ACTIVE | $3.31M | $397.04M | $393.72M | +9,999%+ |
| GS | Goldman Sachs Group, Inc. (The) | Financial Services | Mar 2016 | ACTIVE | $565.00K | $363.45M | $362.88M | +9,999%+ |
| AAPL | Apple Inc. | Technology | Jun 2015 | ACTIVE | $753.00K | $355.13M | $354.38M | +9,999%+ |
| CAT | Caterpillar, Inc. | Industrials | Jun 2013 | ACTIVE | $20.23M | $349.98M | $329.75M | +1630.26% |
| V | Visa Inc. | Financial Services | Jun 2013 | ACTIVE | $21.86M | $347.86M | $326.01M | +1491.54% |
Important Note: Data Limitations
These metrics are based on 13F filing data which has significant limitations:
- Quarterly Snapshots Only: 13F filings show positions at quarter-end, not actual transaction prices
- No Transaction Prices: We cannot determine actual buy/sell prices, only end-of-quarter values
- Performance Estimates: Gains/losses are calculated from first appearance to last update using quarterly values
- Missing Data: Intra-quarter trades, dividends, corporate actions, and exact timing are not captured
- Educational Only: These metrics are estimates for understanding general investment patterns, not actual realized returns
Use these metrics for informational and educational purposes only. They represent broad trends, not precise investment performance.