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(Mark One) 

☒ 

(State or other jurisdiction of incorporation or organization) 

ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 

475 Steamboat Road Greenwich, CT 

(Address of principal executive offices) 

☐ 

TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 

Delaware 

Registrant’s telephone number, including area code: (203) 629-3000 

# SECURITIES AND EXCHANGE COMMISSION 

# For the fiscal year ended December 31, 2020 

For the transition period from ______ to ______. 

(Exact name of registrant as specified in its charter) 

Securities registered pursuant to Section 12(b) of the Act: 

Washington, D.C. 20549 

Commission file number 1-15202 

# W. R. BERKLEY CORPORATION 

# Form 10-K 

OR 

(I.R.S. Employer Identification Number) 

22-1867895 

06830 

(Zip Code) 

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Securities registered pursuant to Section 12(g) of the Act: None 

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.  Yes ☒ No ☐ 

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.  Yes ☐ No ☒ 

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐ 

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐ 

