<PAGE>
<TABLE>
<S> <C> <C>
- -------- UNITED STATES SECURITIES AND EXCHANGE COMMISSION -----------------------------
FORM 4 Washington, D.C. 20549 OMB APPROVAL
- -------- -----------------------------
/ / CHECK THIS BOX IF NO STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OMB NUMBER: 3235-0287
LONGER SUBJECT TO EXPIRES: SEPTEMBER 30, 1998
SECTION 16. FORM 4 OR Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, ESTIMATED AVERAGE BURDEN
FORM 5 OBLIGATIONS MAY Section 17(a) of the Public Utility Holding Company Act of 1935 or HOURS PER RESPONSE .... 0.5
CONTINUE. SEE Section 30(f) of the Investment Company Act of 1940 -----------------------------
INSTRUCTION 1(b).
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<TABLE>
<S> <C> <C>
1. Name and Address of Reporting Person* 2. Issuer Name and Ticker or Trading Symbol 6. Relationship of Reporting Person(s)
to Issuer (Check all applicable)
X Director 10% Owner
Mack Earle I. Mack-Cali Realty Corporation (CLI) ---- ----
- ------------------------------------------------------------------------------------------- Officer (give Other
(Last) (First) (Middle) 3. IRS or Social Security 4. Statement for ---- title ---- (specify
Number of Reporting Month/Year below) below
c/o Mack-Cali Realty Corporation Person (Voluntary) ----------------- ------------------
11 Commerce Drive 3/99
- -------------------------------------------- ------------------- 7. Individual or Joint/Group Filing
(Street) 5. If Amendment, (Check Applicable Line)
Date of Original /x/ Form filed by One Reporting Person
(Month/Year) / / Form filed by More than One
Reporting Person
Cranford, New Jersey 07016
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(City) (State) (Zip) TABLE I - NON-DERIVATIVE SECURITIES ACQUIRED, DISPOSED OF, OR BENEFICIALLY OWNED
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</TABLE>
<TABLE>
<CAPTION>
<S> <C> <C> <C> <C> <C> <C>
1. Title of Security 2. Trans- 3. Trans- 4. Securities Acquired (A) 5. Amount of 6. Owner- 7. Nature
(Instr. 3) action action or Disposed of (D) Securities ship of In-
Date Code (Instr. 3, 4 and 5) Beneficially Form: direct
(Instr. 8) Owned at Direct Bene-
(Month/ End of (D) or ficial
Day/ -------------- -------------------------- Month Indirect Owner-
Year) (A) or (Instr. 3 (I) ship
Code V Amount (D) Price and 4) (Instr. 4) (Instr. 4)
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* If the form is filed by more than one reporting person, (Over)
See Instruction 4(b)(v). SEC 1474 (7-97)
Reminder: Report on a separate line for each class of securities beneficially
owned directly or indirectly.
(Print or Type Responses)
POTENTIAL PERSONS WHO ARE TO 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.
<PAGE>
FORM 4 (CONTINUED)
TABLE II - DERIVATIVE SECURITIES ACQUIRED, DISPOSED OF, OR BENEFICIALLY OWNED
(E.G., PUTS, CALLS, WARRANTS, OPTIONS, CONVERTIBLE SECURITIES)
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------
1. Title of Derivative Security 2. Conver- 3. Trans- 4. Transac- 5. Number of Deriv- 6. Date Exer-
(Instr. 3) sion or action tion Code ative Securities Ac- cisable and Ex-
Exercise Date (Instr. 8) quired (A) or Dis- piration Date
Price of (Month/ posed of (D) (Month/Day/
Deriv- Day/ (Instr. 3, 4, and 5) Year)
ative Year)
Security
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Date Expira-
Exer- tion
Code V (A) (D) cisable Date
<S> <C> <C> <C> <C> <C> <C> <C> <C>
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Units of Limited 2/1/99 J(1) (1) (1)
Partnership Interest (1)
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Units of Limited Partnership
Interest (2) 3/19/99 J(2) (2) (2)
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<CAPTION>
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7. Title and Amount of Under- 8. Price 9. Number 10. Owner- 11. Nature
lying Securities of of Deriv- ship of In-
(Instr. 3 and 4) Deriv- ative Form direct
ative Securi- of De- Bene-
Secur- ties rivative ficial
ity Bene- Secu- Own-
(Instr. ficially rity: ership
5) Owned Direct (Instr. 4)
- ------------------------------ at End (D) or
Amount or of Indi-
Title Number of Month rect (I)
Shares (Instr. 4) (Instr. 4)
<S> <C> <C> <C> <C> <C>
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Common Stock (1) 734,514(1) D
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Common Stock (2) 734,514(2) D
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</TABLE>
Explanation of Responses:
(1) The Units of Limited Partnership Interest ("Units") represent interests in
Mack-Cali Realty, L.P., a Delaware limited partnership, through which Mack-
Cali Realty Corporation conducts its real estate activities. Beginning on
December 11, 1998, the Units are redeemable for cash, based upon the fair
market value of an equivalent number of shares of Common Stock at the time
of such redemption, or, at the election of the Company, shares of Common
Stock on a one-for-one basis. Prior to February 1, 1999, 67,441 of the
reporting person's 734,514 Units beneficially owned at that time were
contingent and convertible, in whole or in part, into ordinary Units upon
the satisfaction by December 11, 1999 of certain conditions relating to
certain properties owned by Mack-Cali Realty Corporation. Until such
conversion, the contingent Units shall not be entitled to any rights
associated with the ordinary Units. As of February 1, 1999, the conditions
had been satisfied for the conversion of 50,293 of the reporting person's
contingent Units into ordinary Units, and
* If the form is filed by more than one reporting person, (Over)
See Instruction 4(b)(v). SEC 1474 (7-97)
Reminder: Report on a separate line for each class of securities beneficially
owned directly or indirectly.
(Print or Type Responses)
POTENTIAL PERSONS WHO ARE TO 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.
<PAGE>
accordingly, 17,148 of the reporting persons Units remained contingent.
(2) The Units represent interests in Mack-Cali Realty, L.P., a Delaware limited
partnership, through which Mack- Cali Realty Corporation conducts its real
estate activities. Beginning on December 11, 1998, the Units are redeemable
for cash, based upon the fair market value of an equivalent number of
shares of Common Stock at the time of such redemption, or, at the election
of the Company, shares of Common Stock on a one-for-one basis. Prior to
March 19, 1999, 17,148 of the reporting person's 734,514 Units beneficially
owned at that time were contingent and convertible, in whole or in part,
into ordinary Units upon the satisfaction by December 11, 1999 of certain
conditions relating to certain properties owned by Mack-Cali Realty
Corporation. Until such conversion, the contingent Units shall not be
entitled to any rights associated with the ordinary Units. As of March 19,
1999, the conditions had been satisfied for the conversion of 958 of the
reporting person's contingent Units into ordinary Units, and accordingly,
16,190 of the reporting persons Units remained contingent.
/s/ EARLE I. MACK 5/10/99
----------------------------------- -----------
**Signature of Reporting Person Date
** 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.
Potential persons who are to respond to the collection of information contained
in this form are not required to respond unless the form displays a currently
valid OMB Number.
* If the form is filed by more than one reporting person, (Over)
See Instruction 4(b)(v). SEC 1474 (7-97)
Reminder: Report on a separate line for each class of securities beneficially
owned directly or indirectly
(Print or Type Responses)
Page 2
SEC 1474 (7-97)
