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

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 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 *
GANTCHER NATHAN
   2. Issuer Name and Ticker or Trading Symbol
MACK CALI REALTY CORP [CLI] 		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)
C/O MACK-CALI REALTY CORPORATION, 343 THORNALL STREET		 3. Date of Earliest Transaction (Month/Day/Year)
04/14/2011
(Street)

EDISON, NJ 08837		 4. If Amendment, Date Original Filed(Month/Day/Year)
 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 04/14/2011   M(1)   5,000 A $ 26.31 27,777 (2) D  
Common Stock 04/14/2011   S(1)   2,400 D $ 33.43 25,377 (2) D  
Common Stock 04/14/2011   S(1)   1,500 D $ 33.44 23,877 (2) D  
Common Stock 04/14/2011   S(1)   1,100 D $ 33.45 22,777 (2) D  

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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 (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 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
(Month/Day/Year)		 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
Director Stock Option (Right to Buy) $ 26.31 04/14/2011   M(1)     5,000 05/14/2002(3) 05/14/2011 Common Stock 5,000 $ 0 0 (4) D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
GANTCHER NATHAN
C/O MACK-CALI REALTY CORPORATION
343 THORNALL STREET
EDISON, NJ 08837		   X      

Signatures

 /s/ Nathan Gantcher   04/18/2011
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) The reporting person obtained and sold the common stock as a result of the cashless exercise of Director Stock Options.
(2) Reported amount does not include 2,500 shares of common stock indirectly beneficially owned by the reporting person through The Gantcher Foundation and 2,500 shares of common stock indirectly beneficially owned by the reporting person through The Gantcher Family Limited Partnership. The reporting person disclaims beneficial ownership of the 2,500 shares beneficially owned by the Gantcher Foundation pursuant to Rule 13d-4.
(3) On May 14, 2001, the reporting person was granted an option to purchase 5,000 shares of common stock. The option vested on May 14, 2002.
(4) The ownership amounts reported exclude options to purchase 5,000 shares of common stock at exercise prices different from those reported in Table II of this Form 4 that are directly beneficially owned by the reporting person.

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