Statement of Changes in Beneficial Ownership (4)

FORM 4

[X] 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 * Fulton Robert Fullarton	2. Issuer Name and Ticker or Trading Symbol CARRIZO OIL & GAS INC [ CRZO ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director                    _____ 10% Owner _____ Officer (give title below)    _____ Other (specify below)
(Last)          (First)          (Middle) 500 DALLAS STREET, SUITE 2300	3. Date of Earliest Transaction (MM/DD/YYYY) 12/20/2019
(Street) HOUSTON, TX 77002 (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	12/20/2019		D		22387	D	(1)	0	D

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
Restricted Stock Units	$0.0	12/20/2019		D			8276	(2)	(2)	Common Stock	8276.0	(2)	0	D

Explanation of Responses:
(1)	On December 20, 2019, pursuant to the Agreement and Plan of Merger, dated as of July 14, 2019, as amended (the "Merger Agreement"), by and between Callon Petroleum Company ("Callon") and Carrizo Oil & Gas, Inc. (the "Company"), the Company merged with and into Callon (the "Merger"), with Callon surviving the Merger. Pursuant to the Merger Agreement, at the effective time of the Merger (the "Effective Time"), each share of Company common stock issued and outstanding immediately prior to the Effective Time owned by the Reporting Person converted into the right to receive 1.75 shares (the "Exchange Ratio") of Callon common stock, along with cash in lieu of fractional shares. The closing price per share of Callon common stock on the New York Stock Exchange on December 19, 2019, the day prior to the Effective Time, was $4.72.
(2)	Pursuant to the Merger Agreement, at the Effective Time, each Company restricted stock unit relating to Company common stock ("Company RSU") outstanding as of immediately prior to the Effective Time was cancelled and converted into the vested right to receive the number of shares of Callon common stock equal to the product of (a) the number of shares of Company common stock subject to such Company RSU as of immediately prior to the Effective Time, multiplied by (b) the Exchange Ratio, rounded up to the nearest whole share.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Fulton Robert Fullarton 500 DALLAS STREET SUITE 2300 HOUSTON, TX 77002	X

Signatures
/s/ David L. Pitts, attorney-in-fact		12/20/2019
**Signature of Reporting Person		Date