EXHIBIT 21 SUBSIDIARIES OF ZENITH Set forth below are the names of certain subsidiaries of Zenith. Certain subsidiaries, which considered in the aggregate would not constitute a significant subsidiary, are omitted from the listing below. JURISDICTION OF NAME ORGANIZATION - - ----------------------------------------------------------------- --------------------------- Zenith Insurance Company California CalFarm Insurance Company California ZNAT Insurance Company California CalFarm Life Insurance Company California CalFarm Insurance Agency California Zenith Star Insurance Company Texas Perma-Bilt, a Nevada Corporation Nevada