Good morning, Kelvin, and thank you very much. Welcome, and thank you for joining us for today's call. I'm delighted to be joined by my colleagues, Brian Costanzo, our CFO; and Simon Wilson, our CEO of Markel Insurance. We're also joined by Mike Heaton, our COO, for the question-and-answer portion of the call. At Markel Group, we're committed to relentlessly compounding your capital and building shareholder value. I'm happy to report that so far in 2025, we continue to do exactly that. I'm particularly pleased that throughout the first 9 months of 2025, every reportable segment made positive contributions to the value of the Markel Group. They also did so in a capital-efficient way, generating significant cash flows that helped fund our ongoing share repurchases and buildup of liquidity. The first 9 months of 2025 stand as compelling evidence of how our differentiated model works. Brian will provide more on our detailed financial performance in a minute, and Simon will speak about our ongoing improvements in our insurance business. But before I turn the call over to them, I would like to say a bit more about our progress this year. First, as you know, our Board and management have been intensely focused on improving our core insurance business. We've taken many decisive actions over the last few years, including: one, exiting underperforming businesses, most notably reinsurance; two, making key leadership changes, including appointing a new insurance company CEO with a proven track record of success; and three, implementing key organizational and structural changes to improve accountability, including shifting most of our overhead directly into the businesses. I'm pleased to report that these actions are beginning to translate into results as we achieved a combined ratio of 93% within Markel Insurance in the third quarter compared to 97% in the comparable period. While this was aided by light cat activity this year, looking underneath some of the lines we exited, the improvement in our core insurance business is becoming clearer. We believe this is just the beginning. The improvements in insurance profitability so far provide evidence that our actions are starting to drive better results. I think it's also worthwhile to point out that we have reported favorable reserve development on an annual basis each year for more than 2 decades now. This reflects our inherent conservatism and commitment to financial integrity. Simon will provide more comments on our insurance business, but the headlines are that we're doing more of what works and less of what does not. We are simplifying the business, increasing accountability to front lines and setting the stage for renewed growth and improved profitability. In all of the businesses we own and oversee, our CEOs have continued to run their businesses with professionalism, long-term focus and extreme skill, navigating through volatile and uncertain economic conditions to deliver strong returns on capital and profitability. The Markel Group system also continues to generate significant cash flow, offering further evidence of the strength of our model. Over the trailing 5 years ending September 30, 2025, our cumulative operating income was nearly $13 billion. This incoming cash gives us financial strength and offers us flexibility to pursue opportunities we understand with partners we trust while returning capital to our shareholders at the same time. Our opportunity set is significant. We can reinvest in our existing businesses or expand into new public and private businesses. Much of our growth capital has been deployed in the industrial, consumer and other and financial sectors, where over decades, we have developed a core set of competencies around culture, capital and leaders, each of which adds to our ability to relentlessly compound your capital. I'll also note that we've earned strong returns on those investments. In the 5-year period of 2020 to 2024, the insurance, industrial, financial and consumer and other segments of Markel Group paid dividends up to the holding company of approximately $2.2 billion. We invested $1.7 billion in acquisitions and additional interest in our existing businesses, primarily in the industrial and consumer sectors, all while supporting substantial growth in insurance. Regarding share repurchases, from the end of 2020 through the end of Q3 2025, we've returned approximately $1.9 billion of capital to shareholders via repurchases, again, while strengthening the balance sheet. Share count was reduced from 13.8 million to 12.6 million. In our investment operations, we continue to remain focused on preserving and protecting your capital. We earned 8.4% on our equity investments so far in 2025. The book yield on our fixed income is 3.5%, and our reinvestment yield was 4.2%. We aim to be thoughtful stewards of capital and seek to match our liabilities by investing in only the highest rated fixed income securities. This safety-first approach has served us well. We are then able to utilize the strength of our balance sheet to invest in the areas where we see the best opportunities to deploy capital. As part of our Board-led review, we also committed to improving our financial disclosures to ensure that you can better see where our earnings come from, how we allocate capital to its highest and best use and how capital has performed overall and in all parts of the Markel Group system. Last quarter, we enhanced our disclosures for the insurance operations to better align it with the business' strategy and provide more detail for investors. This quarter, as you can see from our 10-Q and the supplemental materials we provided yesterday evening, we have provided additional new disclosures, including now reporting our business results into 4 segments: insurance, industrial, financial and consumer and other. I'm sure it will take a little time for everyone to process and digest our new disclosure format, but I hope you will find it helpful in how it describes the ways our diversified set of businesses reinforce our overall financial strength and stability and how our significant reinvestment options and highly efficient and low-cost capital allocation all work together to generate steady and diverse cash flows and relentless compounding of your capital over time. We believe that a key part of our success has always been how our Board and leadership team maintain strong oversight over the company's operational, financial and value performance, always evaluating ways to improve. With that, I'd like to turn things over to Brian. I look forward to answering your questions after he and Simon provide you with an update. Brian?