Exhibit 4.3 AMENDED AND RESTATED TRUST AGREEMENT W. R. BERKLEY CAPITAL TRUST II Dated as of July 26, 2005 TABLE OF CONTENTSTrust Agreement • August 2nd, 2005 • Berkley W R Corp • Fire, marine & casualty insurance • Delaware
Exhibit 4.6 PREFERRED SECURITIES GUARANTEE AGREEMENTPreferred Securities Guarantee Agreement • August 2nd, 2005 • Berkley W R Corp • Fire, marine & casualty insurance • New York
to THE BANK OF NEW YORK as TrusteeSupplemental Indenture • August 2nd, 2005 • Berkley W R Corp • Fire, marine & casualty insurance • New York
