FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES 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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(Print or Type Responses)

1. Name and Address of Reporting Person *   DeBari Giovanni M 2. Date of Event Requiring Statement (Month/Day/Year) 03/13/2019 3. Issuer Name and Ticker or Trading Symbol MACK CALI REALTY CORP [CLI] (Last) (First) (Middle) C/O MACK-CALI REALTY CORPORATION, HARBORSIDE 3, 210 HUDSON ST., STE. 400 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Accounting Officer 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) JERSEY CITY, NJ 07311 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 1,250 D Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Class B LTIP Units	  (1)	  (1)	Common Stock	1,844	$ (1)	D	Â
Class C LTIP Units	  (2)	  (2)	Common Stock	2,246	$ (2)	D	Â
Class D LTIP Units	  (3)	  (3)	Common Stock	742	$ (3)	D	Â
Class F LTIP Units	  (4)	  (4)	Common Stock	5,900	$ (4)	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
DeBari Giovanni M C/O MACK-CALI REALTY CORPORATION HARBORSIDE 3, 210 HUDSON ST., STE. 400 JERSEY CITY, NJ 07311	Â	Â	  Chief Accounting Officer	Â

Signatures

/s/ Giovanni M. DeBari		03/15/2019
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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).
(1)	The Class B LTIP Units are a class of limited partnership units of Mack-Cali Realty, L.P. (the "Operating Partnership") that, following the occurrence of certain events and upon vesting are convertible by the holder into an equivalent number of common units of the Operating Partnership ("Common Units"). Common Units of the Operating Partnership are redeemable by the holder for cash or, at the election of Mack-Cali Realty Corporation (the "Company"), shares of common stock of the Company on a one-for-one basis or the cash value of such shares. The Class B LTIP Units vested on March 8, 2019.
(2)	The Class C LTIP Units are a class of limited partnership units of the Operating Partnership that, following the occurrence of certain events and upon vesting are convertible by the holder into an equivalent number of Common Units. Common Units of the Operating Partnership are redeemable by the holder for cash or, at the election of the Company, shares of common stock of the Company on a one-for-one basis or the cash value of such shares. Fifty percent (50%) of the Class C LTIP Units may vest over a three to five year period based on the attainment of absolute total stockholder return ("TSR") metrics by the Company over a three year performance period. The remaining fifty percent (50%) of the Class C LTIP Units may vest over a three to five year period based on the Company's TSR relative to the TSR of other equity office REITs in the NAREIT Index over the same three year period.
(3)	The Class D LTIP Units are a class of units of the Operating Partnership that, following the occurrence of certain events and upon vesting are convertible by the holder into an equivalent number of Common Units. Common Units of the Operating Partnership are redeemable by the holder for cash or, at the Company's election, shares of common stock of the Company on a one-for-one basis or the cash value of such shares. The Class D LTIP Units vest on April 4, 2020.
(4)	The Class F LTIP Units are a class of units of the Operating Partnership that, following the occurrence of certain events and upon vesting are convertible by the holder into an equivalent number of Common Units. Common Units of the Operating Partnership are redeemable by the holder for cash or, at the Company's election, shares of common stock of the Company on a one-for-one basis or the cash value of such shares. The Class F LTIP Units vest on April 20, 2021.

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