Transaction Details

Footnotes

The reported sales were effected pursuant to a Rule 10b5-1 trading plan adopted August 15, 2025. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2,108.27 to $2,108.28, inclusive. The reporting person undertakes to provide to any security holder of MKL or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2,116.10 to $2,116.49, inclusive. The reporting person undertakes to provide to any security holder of MKL or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2,117.20 to $2,117.49, inclusive. The reporting person undertakes to provide to any security holder of MKL or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2,120.00 to $2,120.90, inclusive. The reporting person undertakes to provide to any security holder of MKL or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2,121.10 to $2,122.01, inclusive. The reporting person undertakes to provide to any security holder of MKL or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2,126.00 to $2,126.01, inclusive. The reporting person undertakes to provide to any security holder of MKL or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2,127.00 to $2,127.51, inclusive. The reporting person undertakes to provide to any security holder of MKL or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. | The information reported herein is based on the MKL 401(k) plan balance as of September 30, 2025. | Beneficial ownership of securities is expressly disclaimed.