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, GC & Secretary
(Last)          (First)          (Middle)
W. R. BERKLEY CORPORATION, 475 STEAMBOAT ROAD
3. Date of Earliest Transaction (MM/DD/YYYY)
8/15/2022
(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  8/15/2022    A    3686 (1) A $0  105065 (2) D   
Common Stock  8/15/2022    F    417 (3) D $65.78  104648 (4) D   
Common Stock                 14728 (5) 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 the vesting of a tranche of performance-based restricted stock units ("RSUs") granted in 2019 under the W. R. Berkley Corporation 2018 Stock Incentive Plan for the three-year performance period ending June 30, 2022.
(2)  On March 23, 2022, the Company's common stock split on a 3-for-2 basis (the "Stock Split"), resulting in an increase of 14,229 shares of common stock underlying vested RSUs beneficially owned by the reporting person.
(3)  Represents payment of tax liability by withholding securities incident to the vesting of RSUs.
(4)  Includes 55,126 shares of common stock underlying RSUs, 52,179 of which have vested (the receipt of which has been deferred) and the balance of 2,947 is scheduled to vest on August 15, 2023; and does not include unvested shares of common stock underlying performance-based RSUs.
(5)  Includes an increase of 4,847 shares of common stock beneficially owned resulting from the Stock Split.

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, GC & Secretary

Signatures
Philip S. Welt 8/17/2022
**Signature of Reporting Person Date

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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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