Zenith's 2007 Annual Report Available on Its Website

Business Wire, Feb 13, 2008

WOODLAND HILLS, Calif. -- Zenith National Insurance Corp. (NYSE:ZNT) posted its 2007 Annual Report to Stockholders on its website, www.thezenith.com, and also furnished it to the Securities and Exchange Commission as an exhibit to a Current Report on Form 8-K.

Zenith's 2007 Form 10-K will be filed on or about February 21, 2008.

Zenith will continue its past practice of distributing printed copies of its Annual Report to Stockholders and proxy materials.

The Private Securities Litigation Reform Act of 1995 provides a safe harbor for forward-looking statements if accompanied by meaningful cautionary statements identifying important factors that could cause actual results to differ materially from those discussed. Forward-looking statements include those related to the plans and objectives of management for future operations, future economic performance, or projections of revenues, income, earnings per share, capital expenditures, dividends, capital structure, or other financial items. Statements containing words such as expect, anticipate, believe, estimate or similar words that are used in this release or in other written or oral information conveyed by or on behalf of Zenith are intended to identify forward-looking statements. Zenith undertakes no obligation to update such forward-looking statements, which are subject to a number of risks and uncertainties that could cause actual results to differ materially from those projected. These risks and uncertainties include, but are not limited to, the following: (1) competition; (2) payroll levels of our customers; (3) weakening economy; (4) adverse state and federal legislation and regulation; (5) changes in interest rates causing fluctuations of investment income and fair values of investments; (6) changes in the frequency and severity of claims and catastrophes; (7) adequacy of loss reserves; (8) changing environment for controlling medical, legal and rehabilitation costs, as well as fraud and abuse; (9) losses associated with any terrorist attacks that impact our workers' compensation business in excess of our reinsurance protection; (9) losses caused by nuclear, biological, chemical or radiological events whether or not there is any applicable reinsurance protection; and (11) other risks detailed herein and from time to time in Zenith's reports and filings with the Securities and Exchange Commission.