Form 4 Filed by Patafio Clement P on March 26, 2008

This form 4 (insider trading filing) was submitted to the Securities and Exchange Commission (SEC) by insider Patafio Clement P on March 26, 2008. The CIK number of this insider is 1236250. At the time of this reporting, Patafio Clement P is the VP - Corporate Controller of Berkley W R Corp . See all insider stock transactions reported by Patafio Clement P and all stock buys, sales, and option exercises made by insiders at Berkley W R Corp . The stock ticker symbol of Berkley W R Corp is BER.

FORM 4		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	OMB APPROVAL OMB Number: 3235-0287 Expires: February 28, 2011 Estimated average burden hours per response 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* PATAFIO CLEMENT P (Last) (First) (Middle) W. R. BERKLEY CORPORATION 475 STEAMBOAT ROAD (Street) GREENWICH CT 06830 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol BERKLEY W R CORP [ BER ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) VP - Corporate Controller
	3. Date of Earliest Transaction (Month/Day/Year) 03/25/2008
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	03/25/2008		M		20,252	A	$9.35	75,503	D
Common Stock	03/25/2008		F		632	D	$27.89	74,871	D
Common Stock	03/25/2008		S		11,353	D	$27.74	63,518 ( 1 ) ( 2 )	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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
Employee Stock Option (Right to Buy)	$9.35	03/25/2008		M			20,252 ( 3 )	( 4 )	05/12/2008	Common Stock	20,252	$0	0	D

Explanation of Responses:

1. On April 4, 2006, the common stock of W. R. Berkley Corporation split 3-for-2 resulting in the reporting person's acquisition of 18,417 additional shares.

2. Includes 29,813 Restricted Stock Units ("RSUs") which are scheduled to vest as follows: 8,438 on April 4, 2008; 12,375 on May 11, 2009; and 9,000 on December 5, 2010.

3. This option was originally reported as covering 4,000 shares at an exercise price of $47.375 per share, and has been adjusted to reflect the 3-for-2 stock splits of July 2002, August 2003, April 2005 and April 2006.

4. Stock option grant vested in four equal installments on May 12, 2001, May 12, 2002, May 12, 2003 and May 12, 2004.

Remarks:

	Clement P. Patafio	03/26/2008
	** Signature of Reporting Person	Date
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