Thank you, Tom. Good morning, everyone. As a reminder, last quarter, we released significant enhancements to our financial disclosures, along with the reporting changes guide available on our IR site. We made these changes to help investors better understand the company and its performance. To review the major changes we made were changing the presentation of investment gains and losses to be included outside of revenues, establishing new reportable segments of Markel Insurance, Industrial, Financial, and Consumer and Other, while collapsing our former investment segment results into these new segments and reporting of new metrics, including adjusted operating income for all segments that excludes investment gains and amortization expense and segment level KPIs such as organic growth and return on equity for insurance. With that, let's cover the results for the period, starting with our consolidated results. Markel Group's consolidated operating revenues, which exclude net investment gains, were up 8% for the quarter and 5% for the year. Operating income for the quarter was $795 million, up from $595 million in the comparable period last year and $3.2 billion for the year versus $3.7 billion in 2024. As a reminder, operating income includes net investment gains, which can be volatile from period to period. Net investment gains were $212 million in the quarter compared with $117 million in the fourth quarter last year and $1.1 billion for the year versus $1.8 billion in 2024. Adjusted operating income, which excludes net investment gains and amortization expense, totaled $626 million for the quarter, up 19% versus the same period last year. Adjusted operating income was $2.3 billion in 2025 compared to $2.1 billion in 2024 or up 10%. The increase in adjusted operating income was primarily driven by improvements in our insurance business and strong performance within our Financial segment. Operating cash flow was $2.8 billion in 2025 versus $2.6 billion in 2024 and comprehensive income to shareholders totaled $606 million in the quarter and $2.6 billion for the year. Turning now to our operating segments, starting with Markel Insurance. The return on equity for Markel Insurance for 2025 was 14% and the trailing 5-year period return on equity was 13%. We view the 5-year average return on equity as our primary KPI within insurance, measuring our commitment to generating consistent profitability within both our underwriting and investment operations and remaining efficient with our use of capital. Markel Insurance underwriting gross written premiums increased 3% for the quarter and 4% for the full year, driven by personal lines in the U.S. and growth across several product classes in our International division. At a divisional level within Markel Insurance, within our International division, gross written premium grew by 14% for the year with the division growing in every market. Our International division continued its recent track record of fantastic results, posting an 83% combined ratio for the year. Programs and Solutions gross written premium grew by 8% for the year, driven by our personal lines and delegated programs units. For our Wholesale and Specialty division, gross written premium declined 4% for the year. Excluding the impact from exiting our U.S. risk managed professional liability book earlier this year, premium growth was flat across the division. In Global Reinsurance, which we exited in 2025, gross written premium declined 10% for the year. Overall, underwriting gross written premium volume, excluding the impact of exiting our Global Reinsurance and U.S. risk managed professional lines grew by 7% for the year. One additional note on premium volume relative to our 2026 reporting. Our underwriting premium volume next year will be impacted by 2 significant items. First, the exit of our $1 billion gross written premium Global Reinsurance business; and second, the transition effective January 1, 2026, of our partnership with Hagerty to a pure fronting model. Hagerty premium will be included in our results going forward as fronted gross written premium versus underwriting gross written premium. This change was a natural next step in our long-term evolution of our partnership with Hagerty, continuing to retain greater amounts of underwriting risk. In 2025, Markel only retained 20% of the Hagerty gross written premium volume, so the impact on our net earned premium volume will be significantly less. Together, these 2 changes will decrease underwriting gross written premiums for 2026 by approximately $2 billion, but we expect these changes over the long term to benefit our combined ratio, adjusted operating income and return on equity. Turning back to insurance profitability. Adjusted operating income for Markel Insurance was $399 million for the quarter, up 31% from last year. The combined ratio for the quarter was 92.9% compared to 95.9% in the same quarter last year. This 3-point improvement was driven by lower losses from our CPI product and within our U.S. casualty lines, partially offset by higher attritional losses in our U.S. personal umbrella product and large losses incurred in the fourth quarter within our U.S. surety line. Our surety portfolio has been highly profitable for us since our acquisition of SureTec in 2017. For the year, Markel Insurance finished with $1.4 billion in adjusted operating income and a combined ratio of 94.6%, a 1 point improvement from last year. We had 6 points of favorable prior year loss development for both the quarter and year-to-date periods, and our balance sheet position for reserves remains strong. Turning next to our investment portfolio. Our net investment income was $258 million in the quarter and $970 million for the year, up 6% for the quarter and 5% year-to-date due to higher interest rates and increased holdings in fixed income securities. Our fixed income portfolio yield was 3.6% for the fourth quarter. We reinvested new money into securities at an average yield of 4% in the quarter versus 3.1% on average across our net maturities. Within our public equity portfolio, during 2025, we made $143 million of net purchases of securities. Our public equity portfolio returned 10.5% for the year, bringing the value of our public equity portfolio at the end of the year to $13 billion with a total unrealized gain of $8.9 billion. Over the trailing 5-year period, the equity portfolio's annual return was 12% compared with 15% for the S&P 500. Our net equity purchases declined year-over-year, reflecting rising and less attractive valuations and better opportunities elsewhere for incremental investments. Moving to our Industrial segment. Revenues were $1 billion for the quarter and $3.9 billion for the full year, up 4% for both the quarter and for the year. Organic revenue growth was 2% for the year. Revenue growth for the year was impacted by our acquisition of Valor and organic growth was driven by our equipment leasing business and our businesses that serve commercial and residential construction markets, partially offset by lower revenues in our transportation products businesses. Adjusted operating income was $80 million for the quarter, down 26% from $108 million in the same period last year. Adjusted operating income was $343 million for the year or down 6% versus 2024. The decline in adjusted operating income was driven by lower revenues in our transportation products businesses and tightening margins due to higher materials and labor costs within our other products businesses. For our Consumer and Other segment, revenues were $274 million in the quarter and $1.4 billion for the full year or up 4% for both the quarter and year-to-date periods. Organic revenue growth was 1% for the year. Adjusted operating income was $23 million in the quarter, up 35% versus $17 million in the same quarter 1 year ago. Adjusted operating income was $175 million for 2025 or up 20% versus 2024, driven primarily by our acquisition of EPI and higher sales volume of ornamental plants. Next, within our Financial segment, revenues were $224 million or up 41% for the quarter versus the same period 1 year ago and $737 million for 2025, up 24% versus 2024. Organic revenue growth was 17% for the year. The increase in revenues for the year was due primarily to increased performance fees and a higher management fee rate within ILS, along with higher premium volumes within our program services product. Year-to-date revenues were impacted by a $41 million gain on the sale of our remaining minority interest in Velocity earlier this year. The increases in revenue drove adjusted operating income up 58% to $107 million for the quarter versus the comparable period 1 year ago and up 25% for 2025 to $327 million. The year-to-date adjusted operating income change was also impacted by $58 million of favorable loss development related to Markel CATCo recognized in 2024. Finally, regarding capital allocation. For the year, we repurchased shares totaling $430 million, reducing our share count to 12.6 million shares from 12.8 million shares at the end of last year. We also redeemed our $600 million preferred stock issue earlier this year, making total capital returned to shareholders over $1 billion. With that, I will pass it over to Simon to discuss Markel Insurance.