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)
8/16/2021
(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  8/16/2021    F    138 (1) D $74.345  67586 (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 28,456 which have been deferred; 2,185 of which are scheduled to vest on August 15, 2022; 3,930 of which are scheduled to vest in two equal installments on 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 8/18/2021
**Signature of Reporting Person Date
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