Markel Corporation and Alterra Capital Holdings Limited have each approved a definitive merger agreement. Under the terms of the agreement, the aggregate consideration for Alterra is approximately $3.13 billion, based on a closing price of $486.05 for Markel common stock on December 18, 2012.

At closing, each Alterra common share will be converted into the right to receive 0.04315 Markel common shares (with cash paid for fractional shares) plus a cash payment of $10. Following the merger, Markel's existing shareholders will own approximately 69 percent of the combined company on a fully diluted basis, with Alterra's shareholders owning approximately 31 percent. Completion of the transaction is contingent upon customary closing conditions, including shareholder and regulatory approvals, and it is expected to close in the first half of 2013.

Upon closing, two directors designated by Alterra's current board will be added to the board of directors of Markel.

Steven A. Markel, Vice Chairman of Markel, commented: “We are very pleased to have reached this agreement to acquire Alterra, an impressive company with proven worldwide underwriting operations in product lines that we believe are highly complementary to Markel's existing lines. In particular, the addition of Alterra's reinsurance and large account insurance portfolios will serve to diversify and strengthen Markel's current book of specialty insurance business. We look forward to welcoming Alterra's talented underwriting teams to Markel – with their help and the benefit of approximately $6 billion in combined shareholders' equity, we believe we will be well positioned to take advantage of a wide range of profitable opportunities.”

W. Marston (Marty) Becker, President and Chief Executive Officer of Alterra, who is expected to leave the company following the close of the transaction, said: “The combination of Alterra with Markel will create an incredibly strong company in global specialty insurance and investments. The demonstrated track record of underwriting discipline in niche market segments by both companies, along with Markel's proven asset management strengths, should benefit all stakeholders. I am confident that Alterra's shareholders, clients and other business partners will continue to be well served when Alterra's underwriting operations join forces with Markel's, and all should benefit from the superior financial strength, expanded capabilities and synergies created by the combined entity.”

Following the close of the transaction, Markel is expected to write annual gross premiums of approximately $4.4 billion, with its business expected to be approximately 50 percent short-tail, 50 percent long tail; 67 percent insurance and 33 percent reinsurance.

Additional details on the transaction are available at www.markelcorp.com and www.alterracap.com.

Victoria Spears

Victoria Spears

Victoria Prussen Spears is senior vice president of Meyerowitz Communications Inc., a law firm marketing communications consulting company. A graduate of Sarah Lawrence College and Brooklyn Law School, Ms. Spears was an attorney at a leading New York City law firm before joining Meyerowitz Communications. She may be contacted at [email protected].

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