Sec Form 4 Filing - Brandon Joseph Patrick @ ALLEGHANY CORP /DE - 2018-09-03

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 Brandon Joseph Patrick 2. Issuer Name and Ticker or Trading Symbol ALLEGHANY CORP /DE [ Y] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Executive Vice President (Last) (First) (Middle) ALLEGHANY CORPORATION, 1411 BROADWAY, 34TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 09/03/2018 (Street) NEW YORK, NY10018 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 09/03/2018 M( 4 ) 1,374 A $ 0 ( 4 ) 26,203 D Common Stock 09/03/2018 D( 4 ) 1,374 D $ 629.24 ( 4 ) 24,829 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 (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 Restricted Stock Units ( 1 ) 09/03/2018 M 1,374 ( 2 ) ( 3 ) ( 3 ) Common Stock 1,374 $ 0 905 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Brandon Joseph Patrick ALLEGHANY CORPORATION 1411 BROADWAY, 34TH FLOOR NEW YORK, NY10018 Executive Vice President Signatures /s/ Joseph P. Brandon 09/04/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Each restricted stock unit represents a contingent right to receive one share of the registrant's Common Stock or a payment in cash in respect of such restricted stock unit in an amount equal to the fair market value of one share of the registrant's Common Stock on the applicable vesting date. ( 2 )Pursuant to the applicable agreement between the registrant and the reporting person, when the registrant pays a cash dividend on its Common Stock, the reporting person is credited with a corresponding dividend on his restricted stock units in the form of additional restricted stock units. As a result, this includes 21 restricted stock units received as dividends in connection with a special cash dividend of $10.00 per share of common stock paid on March 15, 2018. ( 3 )15% of the restricted stock units vest on each of the first six anniversaries of the date of grant and the remaining 10% of the restricted stock units vest on the seventh anniversary of the date of grant. If the reporting person's employment with the issuer terminates prior to vesting, any unvested restricted stock units will be forfeited. ( 4 )Settlement of 1,374 restricted stock units for $864,575.76 in cash.

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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