WRB WR Berkley Corp

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 OF SECURITIES                                                                                   
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940                       

1. Name and Address of Reporting Person * Welt Philip S	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) EVP & General Counsel
(Last)          (First)          (Middle) W. R. BERKLEY CORPORATION, 475 STEAMBOAT ROAD	3. Date of Earliest Transaction (MM/DD/YYYY) 8/5/2021
(Street) GREENWICH, CT 06830 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	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. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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	8/5/2021		F		78 (1)	D	$72.225	67724 (2)	D
Common Stock								9434	I	By ESPP

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		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 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

Explanation of Responses:
(1)	Represents payment of tax liability by withholding securities incident to the vesting of restricted stock units ("RSUs").
(2)	Includes shares of common stock underlying RSUs, the receipt of 24,445 which have been deferred; 4,370 of which are scheduled to vest in two equal installments on August 15, 2021 and August 15, 2022; 5,894 of which are scheduled to vest in three equal installments on August 15, 2021, August 15, 2022 and August 15, 2023; and does not include shares of common stock underlying unvested performance-based RSUs.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Welt Philip S W. R. BERKLEY CORPORATION 475 STEAMBOAT ROAD GREENWICH, CT 06830			EVP & General Counsel

Signatures
Philip S. Welt		8/9/2021
**Signature of Reporting Person		Date