- -------- UNITED STATES SECURITIES AND EXCHANGE COMMISSION ----------------------------- FORM 3 WASHINGTON, D.C. 20549 OMB APPROVAL - -------- ----------------------------- INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES OMB Number: 3235-0104 Expires: September 30, 1998 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Estimated average burden Section 17(a) of the Public Utility Holding Company Act of 1935 or hours per response .... 0.5 (Print or Type Responses) Section 30(f) of the Investment Company Act of 1940 ----------------------------- - ------------------------------------------------------------------------------------------------------------------------------------ 1. Name and Address of Reporting Person* 2. Date of Event Re- 4. Issuer Name AND Ticker or Trading Symbol quiring Statement Zuckerberg Roy J. (Month/Day/Year) Mack-Cali Realty Corporation (CLI) - ------------------------------------------------- ------------------------------------------------------------ (Last) (First) (Middle) 5/19/99 5. Relationship of Reporting Person(s) 6. If Amendment, Date ----------------------- to Issuer (Check all applicable) of Original 3. IRS or Social Se- X Director 10% Owner (Month/Day/Year) c/o Mack-Cali Realty Corporation curity Number of ---- ---- 11 Commerce Drive Reporting Person Officer (give Other (specify --------------------- - ------------------------------------------------- (Voluntary) title below) below) 7. Individual or (Street) ---- ---- Joint/Group Filing (Check Applicable Line) --------------------------- Form filed by One X Reporting Person --- Form filed by More than One Reporting Person Cranford, New Jersey 07016 --- - ------------------------------------------------------------------------------------------------------------------------------------ (City) (State) (Zip) TABLE I -- NON-DERIVATIVE SECURITIES BENEFICIALLY OWNED - ------------------------------------------------------------------------------------------------------------------------------------ 1. Title of Security 2. Amount of Securities 3. Ownership 4. Nature of Indirect Beneficial (Instr. 4) Beneficially Owned Form: Direct Ownership (Instr. 5) (Instr. 4) (D) or Indirect (I) (Instr. 5) - ------------------------------------------------------------------------------------------------------------------------------------ Common Stock 2,500 D - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. (Over) * If the form is filed by more than one reporting person, SEE Instruction 5(b)(v). SEC 1473 (7-97) 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.

FORM 3 (CONTINUED) 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. Conver- 5. Owner- 6. Nature of Indirect (Instr. 4) cisable and Underlying Derivative Security sion or ship Beneficial Expiration (Instr. 4) Exercise Form of Ownership Date Price of Deriv- (Instr. 5) (Month/Day/ Deri- ative Year) vative Security: -------------------------------------------------- Security Direct Amount (D) or Date Expir- or Indirect Exer- ation Title Number (I) cisable Date of Shares (Instr. 5) - ------------------------------------------------------------------------------------------------------------------------------------ Director Stock Option (right to buy) 5/19/00 5/19/09 Common Stock 5,000 $31.625 D - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ Explanation of Responses: /s/ Roy J. Zuckerberg 5/28/99 ------------------------------------- ---------------------- **Intentional misstatements or omissions of facts constitute Federal **Signature of Reporting Person Date 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. Page 2 SEC 1473 (7-97)