FILED BY VALIDUS HOLDINGS, LTD.

PURSUANT TO RULE 425 UNDER THE SECURITIES ACT OF 1933
AND DEEMED FILED PURSUANT TO RULE 14a-12

UNDER THE SECURITIES EXCHANGE ACT OF 1934

SUBJECT COMPANY:  TRANSATLANTIC HOLDINGS, INC.

COMMISSION FILE NO. 001-10545

VALIDUS EXTENDS EXPIRATION DATE OF EXCHANGE OFFER TO ACQUIRE TRANSATLANTIC

-      Exchange Offer expiration date extended to November 25th

PEMBROKE, BERMUDA, November 1, 2011 - Validus Holdings, Ltd. (NYSE: VR) (“Validus”) today announced that it has extended its Exchange Offer for all of the outstanding shares of common stock of Transatlantic to 5:00 p.m., Eastern time, on Friday, November 25, 2011, unless further extended by Validus.  As of 5:00 p.m., Eastern time, on Monday, October 31, 2011, approximately 556,046 shares of Transatlantic common stock (including approximately 20,329 shares subject to guaranteed delivery procedures) had been tendered in and not withdrawn from the Exchange Offer.

Validus and Transatlantic continue to exchange information and remain in discussions regarding a possible transaction, but there can be no assurance that a transaction will be consummated as a result of the ongoing discussions.  Validus does not currently intend to comment further regarding the status of transaction discussions with Transatlantic unless required by applicable law.

About Validus Holdings, Ltd.

Validus Holdings, Ltd. is a provider of reinsurance and insurance, conducting its operations worldwide through two wholly-owned subsidiaries, Validus Reinsurance, Ltd. and Talbot Holdings Ltd.  Validus Re is a Bermuda based reinsurer focused on short-tail lines of reinsurance.  Talbot is the Bermuda parent of the specialty insurance group primarily operating within the Lloyd’s insurance market through Syndicate 1183.

Cautionary Note Regarding Forward-Looking Statements

This press release may include forward-looking statements, both with respect to Validus and its industry, that reflect Validus’ current views with respect to future events and financial performance.  Statements that include the words “expect,” “intend,” “plan,” “believe,” “project,” “anticipate,” “will,” “may,” “would” and similar statements of a future or forward-looking nature are often used to identify forward-looking statements.  All forward-looking statements address matters that involve risks and uncertainties, many of which are beyond Validus’ control.  Accordingly, there are or will be important factors that could cause actual results to differ materially from those indicated in such statements and, therefore, you should not place undue reliance on any such statements.  Validus believes that these factors include, but are not limited to, the following: 1) uncertainty as to whether Validus will be able to enter into or consummate the proposed transaction on the terms set forth in Validus’ proposal; 2) uncertainty as to the actual premium that will be realized by Transatlantic stockholders in connection with the proposed transaction; 3) failure to realize the anticipated benefits (including combination synergies) of the proposed transaction, including as a result of delay in completing the transaction or integrating the businesses of Validus and Transatlantic; 4) uncertainty as to the long-term value of Validus voting common shares; 5) unpredictability and severity of catastrophic events; 6) rating agency actions; 7) adequacy of Validus’ or Transatlantic’s risk management and loss limitation methods; 8) cyclicality of demand and pricing in the insurance and reinsurance markets; 9) Validus’ ability to implement its business strategy during “soft” as well as “hard” markets; 10) adequacy of Validus’ or Transatlantic’s loss reserves; 11) continued availability of capital and financing; 12) retention of key personnel; 13) competition in the insurance and reinsurance markets; 14) potential loss of business from one or more major reinsurance or insurance brokers; 15) the credit risk Validus assumes through its dealings with its reinsurance and insurance

brokers; 16) Validus’ or Transatlantic’s ability to implement, successfully and on a timely basis, complex infrastructure, distribution capabilities, systems, procedures and internal controls, and to develop accurate actuarial data to support the business and regulatory and reporting requirements; 17) general economic and market conditions (including inflation, volatility in the credit and capital markets, interest rates and foreign currency exchange rates); 18) the integration of businesses Validus may acquire or new business ventures Validus may start; 19) the legal, regulatory and tax regimes under which Validus operates; 20) the effect on Validus’ or Transatlantic’s investment portfolios of changing financial market conditions, including inflation, interest rates, liquidity and the recent downgrade of U.S. securities by Standard & Poor’s and the possible effect on the value of securities in Validus’ and Transatlantic’s investment portfolios, as well as other factors; 21) acts of terrorism or outbreak of war or hostilities; 22) availability of reinsurance and retrocessional coverage; and 23) the outcome of transaction related litigation, as well as management’s response to any of the aforementioned factors.

The foregoing review of important factors should not be construed as exhaustive and should be read in conjunction with the other cautionary statements that are included herein and elsewhere, including the Risk Factors included in Validus’ and Transatlantic’s most recent reports on Form 10-K and Form 10-Q and other documents of Validus and Transatlantic on file with the Securities and Exchange Commission.  Any forward-looking statements made in this press release are qualified in their entirety by these cautionary statements, and there can be no assurance that the actual results or developments anticipated by Validus will be realized or, even if substantially realized, that they will have the expected consequences to, or effects on, Validus or its business, operations or financial condition.  Except to the extent required by applicable law, Validus undertakes no obligation to update publicly or revise any forward-looking statement, whether as a result of new information, future developments or otherwise.

The contents of any websites referenced in this press release are not incorporated by reference herein.

Additional Information about the Proposed Transaction and Where to Find It:

Validus has commenced an exchange offer to acquire all of the outstanding shares of common stock of Transatlantic.  This press release are for informational purposes only and does not constitute an offer to exchange, or a solicitation of an offer to exchange, shares of Transatlantic common stock, nor is it a substitute for the Tender Offer Statement on Schedule TO or the prospectus/offer to exchange included in the Registration Statement on Form S-4 (including the letter of transmittal and related documents and as amended and supplemented from time to time, the “Exchange Offer Documents”) filed by Validus with the Securities and Exchange Commission.  The Registration Statement on Form S-4 has been declared effective by the Securities and Exchange Commission.  The Exchange Offer will be made only through the Exchange Offer Documents.  This press release are also not a substitute for the definitive consent solicitation statement that Validus may file with the Securities and Exchange Commission or any other documents which Validus may send to its or Transatlantic’s stockholders in connection with the consent solicitation.  Investors and security holders are urged to read the Exchange Offer Documents, the definitive consent solicitation statement and all other relevant documents that Validus has filed or may file with the Securities and Exchange Commission if and when they become available because they contain or will contain important information about the proposed transaction and the consent solicitation.  All such documents, if filed, will be available free of charge at the Securities and Exchange Commission’s website (www.sec.gov) or by directing a request to Innisfree M&A Incorporated at (877) 717-3929 (banks and brokers may call collect at (212) 750-5833).

Participants in the Solicitation:

Validus, its directors and certain of its officers and Validus’ nominees to the Transatlantic board of directors may be deemed to be participants in any solicitation of Transatlantic stockholders in connection with the consent solicitation.  Information about the participants in the solicitation is available in the preliminary consent solicitation statement that Validus filed with the Securities and Exchange Commission in connection with the consent solicitation.  Other information regarding the participants and a description of their direct and indirect interests, by security holdings or otherwise, is contained in the preliminary consent solicitation statement.