Sec Form 4 Filing - Stone Robert Daly @ BERKLEY W R CORP - 2010-03-02

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Stone Robert Daly 2. Issuer Name and Ticker or Trading Symbol BERKLEY W R CORP [ WRB] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) SVP - Alt. Mkts. Operations (Last) (First) (Middle) W. R. BERKLEY CORPORATION, 475 STEAMBOAT ROAD 3. Date of Earliest Transaction (MM/DD/YY) 03/02/2010 (Street) GREENWICH, CT06830 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/02/2010 A 18,500 ( 1 ) A $ 0 76,698 ( 2 ) D Common Stock 5,624 ( 3 ) I By 401(k) Plan

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owne rs Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Stone Robert Daly W. R. BERKLEY CORPORATION 475 STEAMBOAT ROAD GREENWICH, CT06830 SVP - Alt. Mkts. Operations Signatures Robert Daly Stone 03/03/2010 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents restricted stock units granted under the W. R. Berkley Corporation 2003 Stock Incentive Plan that are scheduled to vest on March 2, 2015. ( 2 )Includes 54,000 restricted stock units which are scheduled to vest as follows: 18,000 on December 5, 2010, 17,500 on December 17, 2012 and 18,500 on March 2, 2015. ( 3 )Between August 5, 2009 and March 1, 2010, the reporting person acquired 19 shares of W. R. Berkley Corporation common stock under the W. R. Berkley Corporation Profit Sharing Plan. The information in this report is based on a statement of account dated March 1, 2010.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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