Item 8.01. Other Events.

On May 12, 2009, Zenith National Insurance Corp., the Registrant, declared a quarterly dividend in the amount of $0.50 per share on its outstanding shares of common stock. A copy of the press release announcing this action is attached hereto as Exhibit 99.1 and it is incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

(a) Not applicable

(b) Not applicable

(c) Not applicable

(d) Exhibits

The following exhibit is filed as part of this report:

Number Exhibit
99.1 Press Release of Zenith National Insurance Corp. dated May 12, 2009