Exhibit 99.1

FOR IMMEDIATE RELEASE

MARKEL REPORTS 2011 FINANCIAL RESULTS

Richmond, VA, February 1, 2012 — Markel Corporation (NYSE: MKL) reported diluted net income per share of $14.60 for the year ended December 31, 2011 compared to $27.27 in 2010. The 2011 combined ratio was 102% compared to 97% in 2010. Book value per common share outstanding increased 8% to $352.10 at December 31, 2011 from $326.36 at December 31, 2010. Over the five-year period ended December 31, 2011, compound annual growth in book value per common share outstanding was 9%.

Alan I. Kirshner, Chairman and Chief Executive Officer, commented, “Our 2011 underwriting results were impacted by the higher than expected frequency of natural catastrophes including the floods in Thailand during the fourth quarter. However, we continued to grow our business with strategic acquisitions in both our insurance and non-insurance operations. In the fourth quarter, we added Weldship to our portfolio of industrial and service companies owned by Markel Ventures and, in January 2012, we acquired THOMCO, a leading specialty insurance program administrator. We believe these and other recent acquisitions will help us achieve our goal to build long-term value for our shareholders.”

The following tables present selected financial data from 2011 and 2010.

Markel Corporation

4521 Highwoods Parkway

Glen Allen, VA 23060-9817

(800) 446-6671

www.markelcorp.com

The decrease in diluted net income per share during 2011 was primarily due to a deterioration in underwriting results, which was driven by higher losses related to natural catastrophes.

Comprehensive income to shareholders for 2011 was $251.9 million compared to $430.6 million in 2010. This decrease was primarily due to lower net income to shareholders and a less favorable change in net unrealized gains on investments.

The increase in the consolidated combined ratio was due to a higher current accident year loss ratio, partially offset by more favorable development of prior years’ loss reserves and a lower expense ratio compared to 2010. The 2011 combined ratio included $152.4 million, or eight points, of underwriting loss related to natural catastrophes. The 2011 underwriting loss related to natural catastrophes included losses from the Thai floods in the fourth quarter and losses from Hurricane Irene, U.S. tornadoes, Japanese earthquake and tsunami, Australian floods and New Zealand earthquakes that occurred during the first nine months of 2011. The 2010 combined ratio included $17.0 million, or one point, of underwriting loss related to the Chilean earthquake. The 2010 combined ratio also included $74.7 million, or four points, of underwriting loss on two run-off programs included in the Excess and Surplus Lines segment that were exposed to losses associated with the adverse conditions in the residential mortgage market. The 2011 combined ratio included $354.0 million of favorable development on prior years’ loss reserves compared to $278.0 million in 2010. The lower expense ratio in 2011 was primarily due to lower costs associated with our system and business process initiatives and lower profit sharing costs.

The Excess and Surplus Lines segment’s combined ratio for 2011 was 86% (including three points of underwriting loss related to natural catastrophes) compared to 96% in 2010. The decrease in the 2011 combined ratio was primarily due to more favorable development of prior years’ loss reserves compared to 2010. The Excess and Surplus Lines segment’s 2011 combined ratio included $227.5 million of favorable development on prior years’ loss reserves compared to $159.0 million in 2010. The redundancies on prior years’ loss reserves experienced within the Excess and Surplus Lines segment in 2011 and 2010 were primarily on our professional and products liability and casualty programs due in part to lower loss severity than originally anticipated. The 2010 combined ratio included $74.7 million, or 10 points, of underwriting loss on two run-off programs that were exposed to losses associated with the adverse conditions in the residential mortgage market. In the first quarter of 2011, we resolved a significant portion of our outstanding liabilities associated with one of these programs and, as a result, reduced prior years’ loss reserves by $15.8 million.

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The Specialty Admitted segment’s combined ratio for 2011 was 109% (including two points of underwriting loss related to natural catastrophes) compared to 100% in 2010. The combined ratio increased in 2011 due to a higher current accident year loss ratio, partially offset by more favorable development of prior years’ loss reserves. In addition to the impact of natural catastrophes, the higher current accident year loss ratio for 2011 was due in part to the impact of soft market conditions on pricing and a greater incidence of high severity losses across several divisions at the Markel Specialty unit, including higher than expected loss frequency and severity on the accident and health liability class. The increase in the current accident year loss ratio for 2011 also was attributable to the impact of the inclusion of our FirstComp workers’ compensation operations in the Specialty Admitted segment. Our workers’ compensation operations added four points and two points to the Specialty Admitted segment’s current accident year loss ratio in 2011 and 2010, respectively, and added five points and one point to the segment’s combined ratio in 2011 and 2010, respectively. The Specialty Admitted segment’s 2011 combined ratio included $27.4 million of favorable development on prior years’ loss reserves compared to $4.7 million in 2010. The favorable development in 2011 was primarily due to redundancies on prior years’ loss reserves at the Markel Specialty unit on the 2006 to 2009 accident years.

The London Insurance Market segment’s combined ratio for 2011 was 116% (including 18 points of underwriting loss related to natural catastrophes) compared to 95% (including three points of underwriting loss related to natural catastrophes) in 2010. In addition to the impact of natural catastrophes, the combined ratio increased in 2011 due to less favorable development of prior years’ loss reserves. The London Insurance Market segment’s 2011 combined ratio included $94.8 million of favorable development on prior years’ loss reserves compared to $117.7 million in 2010. The redundancies on prior years’ loss reserves experienced within the London Insurance Market segment in 2011 and 2010 occurred in a variety of programs across each of our divisions.

The following table summarizes, by segment, the impact of losses related to natural catastrophes on our 2011 underwriting results.

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The estimated net losses on the catastrophes that occurred during 2011 represent our best estimate of losses based upon the most current information available. We have used various loss estimation techniques to develop these reserves, including reviews of modeled loss estimates that factor in third party industry loss estimates, detailed policy level reviews and direct contact with insureds and brokers. However, reported losses and information on potential losses have come in slowly given the magnitude of each of these losses. Due to the uncertainty associated with these events, we believe our loss estimates may have a high degree of volatility. While we believe our reserves for the catastrophes experienced during 2011 are adequate, we continue to closely monitor reported claims and will adjust our estimates of gross and net losses as new information becomes available.

The net losses from each of these events were within our risk tolerances. However, the number of catastrophes experienced during 2011 was higher than expected. We have started to see an increase in catastrophe-exposed property rates. We will selectively accept catastrophe exposures when we believe the exposures are adequately priced for the risks incurred. We will refine and review our exposures in view of our 2011 results and seek to improve the profitability of this business. If the market price does not support our underwriting profit targets for catastrophe-exposed risks, we will not write the business.

Gross written premiums for 2011 increased 16% compared to 2010. In 2011, the Specialty Admitted segment included $226.7 million of gross written premiums from FirstComp compared to $40.7 million in 2010. The increase in gross premium volume in 2011 also was attributable to higher gross premium volume in the London Insurance Market segment due in part to an increase in premiums written by Elliott Special Risks, which was converted from a managing general agent operation to a risk bearing insurance division during 2010. Gross premium volume in the London Insurance Market segment also benefitted from offering higher policy limits and an improved pricing environment in the Marine and Energy division. Gross premium volume in the Excess and Surplus Lines segment decreased in 2011 compared to 2010 due to a reduction in written premiums on two specialized insurance programs. Excluding these two programs, gross premium volume in the Excess and Surplus Lines segment experienced modest growth during 2011. Foreign currency exchange rate movements did not have a significant impact on gross premium volume in 2011.

During 2011, the unfavorable pricing trends experienced in 2010 continued for some of our product lines, most notably our professional and products liability programs within the Excess and Surplus Lines segment. However, price declines stabilized for most of our product lines during 2011, and we achieved moderate price

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increases in several lines, most notably within the Marine and Energy division of the London Insurance Market segment. We routinely review the pricing of our major product lines and will continue to pursue price increases for most product lines in 2012; however, when we believe the prevailing market price will not support our underwriting profit targets, the business is not written. As a result of our underwriting discipline, gross premium volume may vary when we alter our product offerings to maintain or improve underwriting profitability.

Net retention of gross premium volume was 89% for both 2011 and 2010. As part of our underwriting philosophy, we seek to offer products with limits that do not require significant amounts of reinsurance. We purchase reinsurance in order to reduce our retention on individual risks and enable us to write policies with sufficient limits to meet policyholder needs.

Earned premiums for 2011 increased 14% compared to 2010. In 2011, the Specialty Admitted segment included $200.8 million of earned premiums from FirstComp compared to $36.9 million in 2010. The increase in earned premiums in 2011 also was due to higher earned premiums in the London Insurance Market segment, which was primarily a result of higher gross premium volume. The decrease in earned premiums in the Excess and Surplus Lines segment was primarily a result of lower gross premium volume. Foreign currency exchange rate movements did not have a significant impact on earned premiums in 2011.

Net investment income for 2011 was $263.7 million compared to $272.5 million in 2010. The decrease in 2011 was primarily due to an adverse change in the fair value of our credit default swap. Net investment income for 2011 included an adverse change in the fair value of our credit default swap of $4.1 million compared to a favorable change of $1.7 million in 2010. The decrease in net investment income in 2011 also was attributable to a decline in investment yields as we increased our allocation to short-term investments and cash and cash equivalents. The impact of lower investment yields during 2011 was partially offset by having higher invested assets in 2011 compared to 2010.

Net realized investment gains for 2011 were $35.9 million compared to $36.4 million in 2010. Net realized investment gains for 2011 included $20.2 million of write downs for other-than-temporary declines in the estimated fair value of investments compared to $12.2 million of write downs in 2010. Variability in the timing of realized and unrealized investment gains and losses is to be expected.

Other revenues and other expenses include the results of our non-insurance operations, which we refer to collectively as Markel Ventures. Our non-insurance operations are comprised of a diverse portfolio of industrial and service companies. In 2011, revenues from our non-insurance operations were $317.5 million compared to $166.5 million in 2010. Net income to shareholders from our non-insurance operations was $7.7 million in 2011 compared to $4.2 million in 2010. Revenues and net income to shareholders from our non-insurance operations increased in 2011 compared to 2010 primarily due to our acquisitions of RD Holdings, LLC and Diamond Healthcare Corporation in late 2010.

In July 2011, we acquired PartnerMD, LLC, a privately held company headquartered in Richmond, Virginia that provides concierge medical and executive health services. In September 2011, we acquired Baking Technology Systems, Inc.

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(BAKE-TECH), a privately held company based in Tucker, Georgia that supplies ovens and other related equipment to high-speed bread and bun bakeries. In October 2011, we acquired an 83% controlling interest in WI Holdings Inc. (Weldship), a privately held company based in Bethlehem, Pennsylvania that manufactures and leases high-pressure trailer tubes used by industrial, chemical and distribution companies to transport gas and liquids. Total consideration for these three acquisitions was $104.6 million. In connection with these three acquisitions, we recognized goodwill of $46.5 million and other intangible assets of $43.2 million.

Invested assets were $8.7 billion at December 31, 2011 compared to $8.2 billion at December 31, 2010. At December 31, 2011, we held fixed maturities of $53.9 million, or less than 1% of invested assets, from sovereign and non-sovereign issuers domiciled in Portugal, Ireland, Italy, Greece or Spain and $730.4 million, or 8% of invested assets, from sovereign and non-sovereign issuers domiciled in other European countries including supranationals. Equity securities were $1.9 billion, or 21% of invested assets, at December 31, 2011 compared to $1.7 billion, or 21% of invested assets, at December 31, 2010. Net unrealized gains on investments, net of taxes, were $704.7 million at December 31, 2011 compared to $581.3 million at December 31, 2010. At December 31, 2011, we held securities with gross unrealized losses of $17.7 million, or less than 1% of invested assets.

Interest expense for 2011 was $86.3 million compared to $73.7 million in 2010. The increase in 2011 was due in part to our $250 million issuance of 5.35% unsecured senior notes in June 2011.

Income tax expense for 2011 was 22% of our income before income taxes, which differs from the statutory tax rate of 35% primarily as a result of tax-exempt investment income. Income tax expense for 2010 was 9% of our income before income taxes, which included an 11% income tax benefit related to foreign operations as a result of a change in our plans regarding the amount of earnings considered permanently reinvested in foreign subsidiaries.

In January 2012, we acquired Thompson Insurance Enterprises, LLC (THOMCO), a privately held program administrator headquartered in Kennesaw, Georgia that underwrites multi-line, industry-focused insurance programs. Results attributable to this acquisition will be included in the Specialty Admitted segment.

This release contains statements concerning or incorporating our expectations, assumptions, plans, objectives, future financial or operating performance and other statements that are not historical facts. These statements are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995.

There are risks and uncertainties that may cause actual results to differ materially from predicted results in forward-looking statements. Factors that may cause actual results to differ are often presented with the forward-looking statements themselves. Additional factors that could cause actual results to differ from those predicted are set forth under “Risk Factors” and “Safe Harbor and Cautionary Statement” in our 2010 Annual Report on Form 10-K and most recent Quarterly Report on Form 10-Q or are included in the items listed below:

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Our premium volume, underwriting and investment results and results from our non-insurance operations have been and will continue to be potentially materially affected by these factors. By making forward-looking statements, we do not intend to become obligated to publicly update or revise any such statements whether as a result of new information, future events or other changes. Readers are cautioned not to place undue reliance on any forward-looking statements, which speak only as at their dates.

Our previously announced conference call, which will involve discussion of our financial results and business developments and may include forward-looking information, will be held Thursday, February 2, 2012, beginning at 10:30 a.m. (Eastern Standard Time). Any person interested in listening to the call, or a replay of the call, which will be available from approximately two hours after the conclusion of the call until Monday, February 13, 2012, should contact Markel’s Investor Relations Department at 804-747-0136. Investors, analysts and the general public also may listen to the call free over the Internet through Markel Corporation’s web site, www.markelcorp.com. A replay of the call will also be available on this web site until Monday, February 13, 2012.

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Markel Corporation is a diverse financial holding company serving a variety of niche markets. The Company’s principal business markets and underwrites specialty insurance products. In each of the Company’s businesses, it seeks to provide quality products and excellent customer service so that it can be a market leader. The financial goals of the Company are to earn consistent underwriting and operating profits and superior investment returns to build shareholder value.

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MARKEL CORPORATION AND SUBSIDIARIES

Consolidated Statements of Income and Comprehensive Income

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Markel Corporation and Subsidiaries

Segment Reporting Disclosures

For the Quarters and Years Ended December 31, 2011 and 2010

Segment Gross Written Premiums

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