<PAGE>
U.S. SECURITIES AND EXCHANGE COMMISSION
Washington, D.C.
FORM 3 OMB APPROVAL
-----------------------------
OMB NUMBER: 3235-0104
Expires: April 30, 1997
Estimated average burden
hours per response ...... 0.5
-----------------------------
INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES
Filed pursuant to Section 16(a) of the Securities and Exchange Act of 1934,
Section 17(a) of the Public Utility Holding Company Act of 1935 or
Section 30(f) of the Investment Company Act of 1940
(Print or Type Responses)
1. Name and Address of Reporting Person*
Mack Fredric H.
- --------------------------------------------------------------------------------
(Last) (First) (Middle)
c/o Mack-Cali Realty Corporation
11 Commerce Drive
- --------------------------------------------------------------------------------
(Street)
Cranford NJ 07016
- --------------------------------------------------------------------------------
(City) (State) (Zip)
- --------------------------------------------------------------------------------
2. Date of Event Requiring Statement (Mo/Day/Yr)
12/11/97
- --------------------------------------------------------------------------------
3. IRS or Social Security Number of Reporting Person (Voluntary)
- --------------------------------------------------------------------------------
4. Issuer Name and Ticker or Trading Symbol
Mack-Cali Realty Corporation (CLI)
- --------------------------------------------------------------------------------
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
----- ------
Officer (give X Other (Specify
----- title below) ------ below)
Member of Advisory Board
----------------------------------
- --------------------------------------------------------------------------------
6. If Amendment, Date of Original (Month/Day/Year)
- --------------------------------------------------------------------------------
7. Individual or Joint/Group
Filing (Check Applicable Line)
__X__ Form filed by One Reporting Person
_____ Form filed by More than One Reporting Person
<TABLE>
<CAPTION>
Table 1 -- Non-Derivative Securities Beneficially Owned
1. Title of Security 2. Amount of Securities 3. Ownership Form: 4. Nature of Indirect Beneficial Ownership
(Instr. 4) Beneficially Owned Direct (D) or (Instr. 5)
(Instr. 4) Indirect (I)
(Instr. 5)
- -------------------------- --------------------------- ----------------- ------------------------------------------
<S> <C> <C> <C>
- -------------------------- --------------------------- ----------------- ------------------------------------------
- -------------------------- --------------------------- ----------------- ------------------------------------------
- -------------------------- --------------------------- ----------------- ------------------------------------------
- -------------------------- --------------------------- ----------------- ------------------------------------------
- -------------------------- --------------------------- ----------------- ------------------------------------------
- -------------------------- --------------------------- ----------------- ------------------------------------------
- -------------------------- --------------------------- ----------------- ------------------------------------------
- -------------------------- --------------------------- ----------------- ------------------------------------------
- -------------------------- --------------------------- ----------------- ------------------------------------------
- -------------------------- --------------------------- ----------------- ------------------------------------------
</TABLE>
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 5(b)(v).
(Over)
<PAGE>
FORM 3 (continued)
<TABLE>
<CAPTION>
Table II -- Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security 2. Date Exer- 3. Title and Amount of Securities 4. Conversion 5. Ownership 6. Nature of
(Instr. 4) cisable and Underlying Derivative Security or Exercise Form of Indirect
Expiration (Instr. 4) Price of Derivative Beneficial
Date Derivative Security: Ownership
(Month/Day/ Security Direct (D) (Instr. 5)
Year) or
------- ------- --------------------------------- Indirect (I)
Date Expira- Amount (Instr. 5)
Exer- tion or
cisable Date Title Number
of
Shares
- ------------------------------- ------- ------- ------------------------ ------- -------------- --------------- -------------
<S> <C> <C> <C> <C> <C> <C> <C>
Units of Limited Partnership (1) Common Stock 250,635 D
Interest (1)
- ------------------------------- ------- ------- ------------------------ ------- -------------- --------------- -------------
Units of Limited Partnership (1) Common Stock 39,495 I Fredric Mack,
Interest (1) Charitable
Trust A
- ------------------------------- ------- ------- ------------------------ ------- -------------- --------------- -------------
Units of Limited Partnership (1) Common Stock 23,874 I Fredric Mack,
Interest (1) 4/30/92 Trust
- ------------------------------- ------- ------- ------------------------ ------- -------------- --------------- -------------
Series B Preferred Units of (2) Common Stock (2) D
Limited Partnership Interest (2)
- ------------------------------- ------- ------- ------------------------ ------- -------------- --------------- -------------
Series B Preferred Units of (2) Common Stock (2) I Fredric Mack,
Limited Partnership Interest (2) Charitable
Trust A
- ------------------------------- ------- ------- ------------------------ ------- -------------- --------------- -------------
Series B Preferred Units of (2) Common Stock (2) I Fredric Mack,
Limited Partnership Interest (2) 4/30/92 Trust
- ------------------------------- ------- ------- ------------------------ ------- -------------- --------------- -------------
</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. The Units shall
be redeemable on a one-for-one basis for shares of Common Stock beginning on
December 11, 1998. 205,604 of the reporting person's 250,635 Units are
contingent and will convert, 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.
(2) The Series B Preferred Units of Limited Partnership Interest (the "Series B
Preferred Units") are immediately convertible into Units. 685 of the
reporting person's 15,929 Series B Preferred Units are contingent and will
convert, in whole or in part, into ordinary Series B Preferred 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 Series B Preferred Units shall not be entitled to
any rights associated with the ordinary Series B Preferred Units. Currently,
the reporting person's 15,244 ordinary Series B Preferred Units are
convertible into 439,942 Units, the 2,535 Series B Preferred Units held by
the Charitable Trust are convertible into 73,160 Units and the 1,492 Series
B Preferred Units held by the 4/30/92 Trust are convertible into 43,059
Units. Any Units received upon conversion of Series B Preferred Units shall
be redeemable into an equal number of shares of Common Stock beginning on
December 11, 2000.
**Intentional misstatements or omissions of facts constitute Federal Criminal
Violations.
See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
/s/ Fredric H. Mack February 27, 1998
------------------------------- -----------------
**Signature of Reporting Person Date
Note: File three copies of this Form, one of which must be manually signed. If
space provided is insufficient, see Instruction 6 for procedure.
