Thanks, Teri, and good morning, everyone. It's great to be with you to discuss our insurance engine results for the third quarter. Clearly, our insurance operations performance is not where we want it to be. However, I am confident that we are taking the right actions quickly in the near term to successfully confront what are predominantly industry-wide challenges that set Markel up for long-term success. As I walk you through our financials, you will see our performance is being impacted by a few pockets within our product portfolio that are negatively influencing our underwriting results for the period. This includes the well-documented higher loss cost trends in recent years, which are creating prior adverse reserve development within our risk managed D&O and excess casualty lines, and mid-market excess an umbrella in primary casualty contractors liability books. We are working incredibly hard to evaluate the ultimate cost to set on claims on these meaningful portfolios, examining the maturing accident years from the last soft market cycle, while seeking to gain confidence around margins on more recent accident years that were written in a more favorable market environment. We are also maintaining a higher level of prudence on our current accident year loss picks within these products due to the uncertainty around future loss cost trends. We are acting with a great deal of discipline being more selective around new business, pushing rates and terms and letting business laps that doesn't meet our profitability targets. We are in the process of remixing our portfolio to improve overall profitability. And ensuring our reserves are robust as we move into 2024. In short, Markel has long been a conservative company and one that demonstrates caution when it comes to evaluating adverse claims trends. Let me now share a few further thoughts on our results from across our collection of insurance businesses, which includes our insurance and reinsurance, State National program services and the fill insurance-linked securities operations. Across all of our businesses within the insurance engine, through three quarters, we have produced $6.3 billion in revenues, up 8% from last year, while generating pretax operating income of $371 million. The insurance engine also continues to generate significant operating cash flows, and we have been intentional about taking the cash and maximizing the investment return on the float generated by our underwriting operations and attractive market yields. Moving to the results of our underwriting operations. We reported a combined ratio of 99% in the third quarter results, which was significantly influenced by several noteworthy items. Three, to be exact. First, we realized a total of $46 million or two points of losses in the quarter related to catastrophe events, specifically the Hawaiian wildfires and Hurricane Idalia. The losses concentrated in our small commercial inland marine and binding property lines. We also recognized $30 million or just under two points of development on the prior accident year losses within a runoff portion of our public entity line in reinsurance. We exited this segment of reinsuring not-for-profit entities in California and other West Coast-based states in 2020, recognizing that this book was not performing adequately. We now believe the ultimate losses from this book are likely need to be greater than what we had previously allowed before. Based on a recent completion of an actuary and claims review. Finally, we recognized losses in the quarter within our intellectual property collateral protection product line, including a $25 million or one point impact to the combined ratio from credit losses related to a fraudulent letter of credit provided by Best 2. Our CPI product in total had a three point impact on our combined ratio. If you exclude these three items, our reported combined ratio of 99% in the quarter converts to 93%, consistent with our result for the first half of this year. This highlights the fact that we have many product lines within our portfolio that are performing very well. Turning to premium production. Overall, gross written premiums in our underwriting operations grew by 1% in the quarter and 5% year-to-date. As I pointed out last quarter, we continued to achieve premium growth in lines where we see opportunities and feel good about the levels of rate adequacy. We are taking advantage of the improved pricing environment and have achieved strong growth in our property, in the marine, binding, personal loans and select marine and energy classes internationally as well as regional growth in our U.K., European and Asian operations. Just as important, we continue to reduce writings in certain classes where we are seeing unacceptable rate decreases relative to loss cost trends. Within our professional liability lines, this is the most notable in the large account public D&O space. We've also decreased writings in our intellectual property collateral protection line as part of our re-underwriting effort in that product. Our professional lines writings have also been impacted by changes in the broader economy, including the slowdown in M&A and public listings, which is impacting premium volume within our transaction liability product line within both our insurance and reinsurance segments. In other professional classes, in particular, within our international portfolio, we are pursuing growth opportunities where we find the business to be adequately priced, although growth has moderated over the course of 2023. Within our general liability product lines, we are seeing solid rate increases overall and achieving moderate opportunistic growth. For example, we are increasing our writings in our finding casualty and environmental lines, which have been consistently profitable. Conversely, we are contracting premiums in our primary casualty contractors liability and excess and umbrella lines where loss costs have been more challenging, and we are carefully selecting risks, pushing rate, managing limits and attachment points to combat these trends. Our year-to-date consolidated combined ratio of 95% for the first nine months of the year is up four points from a year ago. This increase is driven by the items I just discussed earlier, impacting the third quarter results along with the impact from higher attritional loss ratios in our professional liability and general liability product lines and slightly lower overall prior accident year loss takedowns largely driven by our general liability lines. With respect to the increases in our current accident year loss ratio, we remain cautious in recognizing the benefits from our product diversification and re-underwriting strategies within our general liability and professional liability product losses. We are choosing to increase the confidence level in our loss picks to reflect the higher loss cost trends we are seeing in prior accident years and the uncertainty around the economic and claims environment that will exist in the future when we ultimately settle claims on these long tail lines. We also continue to maintain a cautious approach to recognizing prior accident year loss takedowns. We recognized $170 million or three points of prior accident year loss takedowns through the first nine months of the year, down slightly from a year ago. As I've stated in prior quarters, our loss reserving philosophy remains unchanged. We continue to hold loss reserves at levels that are more likely to prove redundant than deficient. And we are reacting quickly by recognizing additional loss reserves and loss trends outpaced previously held expectations. One final comment to make relative to our underwriting results with respect to our Reinsurance segment where we produced a combined ratio of 102% in the quarter. While this result is disappointing, it should be noted that the prior accident year was adverse development in the runoff segment of our public entity book added 11 points to the third quarter Reinsurance segment combined ratio. Excluding this development, our reinsurance result is more aligned with our long-term underwriting targets. We have worked hard in the past two years to re-underwrite our reinsurance treaty mix and return our reinsurance results to profitability. We remain confident that over the long-term, we will see positive and sustainable impact of those efforts materialize in our results. Next, I'll quickly touch on the two portions of our business that are reported as part of our other operations, our program services and other fronting operations and our insurance-linked securities operations. Total premium production within our program services and other fronting operations totaled $3 billion year-to-date versus $2.6 billion a year ago, resulting in an increase in operating revenues of 2% for the first nine months of the year due to expansion of existing programs and addition of new programs. Our State National team continues to perform extremely well producing consistent profitability and continuing to pursue opportunities within our business development pipeline. Within our Nephila insurance-linked securities operations, revenues and expenses for the first nine months of the year were down due to the impact of the sale of our MGA operations in 2022. Revenues within our fund management operations are up from last year due to revenues recognized during the third quarter of this year of $30 million related to the release of capital that had been trapped in side pockets. Our assets under management in Nephila up $6.8 billion is down from a year ago, due to the redemption of side pocket classes in the quarter, which outpaced profits generated from the funds year-to-date. However, the current pricing environment for catastrophe-exposed property risk has created a very attractive return proposition for investors. The platform has produced profitable results for the year. The team is working very hard to capitalize on these market opportunities, focusing on price transparency and portfolio construction. At this time, we feel very well positioned heading into 2024. Turning to current market commentary and outlook. Submission activity and new business opportunities remain robust outside of professional lines, which continue to be impacted by less M&A activity and an unfavorable pricing environment. Overall, trends within the specialty insurance marketplace remains strong. Just a few comments on rate across our portfolio. Throughout 2023, we have achieved modest rate increases across the landscape of our diversified product portfolio. In the current pricing environment, rate trends are more divergent by product class in contrast in the past few years. Pricing seems to be keeping pace with or staying slightly ahead of trend. We are achieving significant rate increases in our property coverages in select marine and energy product lines due to the recent industry loss experience and increasing cost of obtaining reinsurance protection, Additionally, within our general liability product lines, we continue to achieve modest rate increases across most product classes and have seen the level of increases improve over the course of the year. Within our insurance and reinsurance professional liability product lines, we have seen modest rate decreases overall, driven by notable decreases within our public directors and officers product consistent with the broader trends across the industry and to a lesser extent within our errors and emissions coverages. In other professional product liability product lines, particularly within our international portfolio, we are generally seeing consistency in rates. And are continuing to pursue growth opportunities where we find the business to be adequately priced. We're also seeing moderate rate decreases globally within our cyber product line in response to several years of significant rate increases and strong industry underwriting performance. Despite these current trends, we view cyber as a long-term growth opportunity. Finally, we continue to realize low single-digit rate decreases within our workers' compensation product line and are reacting accordingly on a state-by-state basis to maintain profitability. In closing, our focus as a business unit remains on achieving long-term profitable growth across our insurance platform. We have numerous success stories to celebrate across our diversified portfolio of doing just that. Reinsurance market conditions are favorable, and we are taking advantage of this within our operations. Our State National business continues its track record of consistent profitable performance. And Nephila, we are seeing strong returns thus far this year within our portfolios, opening the door to future growth opportunities. Thank you. And with that, I will turn things back over to Tom.