- -------- UNITED STATES SECURITIES AND EXCHANGE COMMISSION FORM 4 WASHINGTON, D.C. 20549 - -------- / / CHECK THIS BOX IF NO STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP LONGER SUBJECT TO SECTION 16. FORM 4 OR Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, FORM 5 OBLIGATIONS MAY Section 17(a) of the Public Utility Holding Company Act of 1935 or CONTINUE. SEE Section 30(f) of the Investment Company Act of 1940 INSTRUCTION 1(b). (Print or Type Responses) - ------------------------------------------------------------------------------------------------------------------------------------ 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) Cali John R. Mack-Cali Realty Corporation (CLI) Director 10% Owner ---- ---- - --------------------------------------------------------------------------------------------- X Officer (give Other (Last) (First) (Middle) 3. IRS or Social Security 4. Statement for ---- title ---- (specify Number of Reporting Month/Year below) below Person (Voluntary) c/o Mack-Cali Realty Corporation 10/99 EXECUTIVE VICE PRESIDENT--DEVELOPMENT 11 Commerce Drive - -------------------------------------------- --------------------- ----------------- ------------------ (Street) 5. If Amendment, 7. Individual or Joint/Group Filing Date of Original (Check Applicable Line) Cranford, New Jersey 07016 (Month/Year) _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 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 (I) ship Code V Amount (D) Price (Instr. 3 (Instr. 4) (Instr. 4) and 4) - ------------------------------------------------------------------------------------------------------------------------------------ Common Stock 10/13/99 M(1) 1,000 A $17.25 1,000 D - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ * If the form is filed by more than one reporting person, see Instruction 4(b)(v). Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. (Over) (Print or Type Responses)

FORM 4 (CONTINUED) TABLE II - DERIVATIVE SECURITIES ACQUIRED, DISPOSED OF, OR BENEFICIALLY OWNED (E.G., PUTS, CALLS, WARRANTS, OPTIONS, CONVERTIBLE SECURITIES) - ------------------------------------------------------------------------------------------------------------------------ 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 -------------------- Date Expira- -------------------------------------- Exer- tion cisable Date Code V (A) (D) - ------------------------------------------------------------------------------------------------------------------------ Employee Stock Option $17.25 10/13/99 M 1,000 (2) 8/31/04 (Right to Buy) - ------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------ 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) - ------------------------------------------------------------------------------------------ Common Stock 1,000 115,900 D - ------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------ Explanation of Responses: (1) The reporting person obtained the Common Stock as a result of the exercise and hold of Employee Stock Options. (2) On August 31, 1994, the reporting person was granted an option to purchase 200,000 shares of Common Stock. The options vested in three equal annual installments beginning December 31, 1995. /S/ JOHN R. CALI 11/10/99 ----------------------------------- ----------- **Intentional misstatements or omissions of facts constitute **Signature of Reporting Person Date 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. Page 2