<Page>
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 8-K
CURRENT REPORT
PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934
Date of report (date of earliest event reported):
SEPTEMBER 27, 2002
--------------------
MACK-CALI REALTY, L.P.
- --------------------------------------------------------------------------------
(Exact name of Registrant as specified in its charter)
Delaware
- --------------------------------------------------------------------------------
(State or other jurisdiction of incorporation)
333-57103-01 22-3315804
- --------------------------- --------------------------
(Commission File No.) (I.R.S. Employer
Identification No.)
11 Commerce Drive, Cranford, New Jersey 07016
- --------------------------------------------------------------------------------
(Address of Principal Executive Offices) (Zip Code)
(908) 272-8000
--------------
(Registrant's telephone number, including area code)
N/A
- --------------------------------------------------------------------------------
(Former Name of Former Address, if Changed Since Last Report)
<Page>
ITEM 5. OTHER EVENTS
On September 27, 2002, Mack-Cali Realty, L.P. (the "Company") refinanced
its unsecured revolving credit facility with a group of 14 lender banks. The
credit facility provides for loans or other extensions of credit to be made
to the Company in an aggregate principal amount of up to $600 million
(expandable to $800 million). The credit facility currently carries an
interest rate of the London Inter-Bank Offered Rate (LIBOR) plus 70 basis
points, and a facility fee of 20 basis points. The interest rate and facility
fee are both subject to adjustment, on a sliding scale, based upon a change
in the Company's unsecured debt ratings, as further described in the Amended
and Restated Revolving Credit Agreement (the "Agreement"). The credit
facility has a three-year term with a one-year extension option.
The lending group for the credit line consists of: JPMorgan Chase Bank,
as administrative agent; Fleet National Bank, as syndication agent;
Commerzbank AG, as syndication agent; Bank of America, N.A., as documentation
agent; Wells Fargo Bank, National Association, as documentation agent; Bank
of Nova Scotia; Bank One, NA; Citicorp North America, Inc.; Wachovia Bank,
National Association; PNC Bank, National Association; SunTrust Bank;
Bayerische Landesbank Girozentrale; Deutsche Bank Trust Company Americas; and
Chevy Chase Bank, FSB. Mack-Cali Realty Corporation, a Maryland corporation
and the sole general partner of the Company, and certain of its subsidiaries
are the guarantors of the obligations of the Company under the Agreement.
In connection with the foregoing, the Company hereby files the following
documents.
ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS
(c) Exhibits.
<Table>
<Caption>
Exhibit Number Exhibit Title
-------------- -------------
10.1 Amended and Restated Revolving Credit
Agreement among Mack-Cali Realty, L.P. and
JPMorgan Chase Bank, Fleet National Bank,
and other lenders that may become party
to the Amended and Restated Revolving Credit
Agreement, dated September 27, 2002.
99.1 Press Release issued by Mack-Cali Realty
Corporation, dated September 30, 2002.
</Table>
<Page>
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.
MACK-CALI REALTY, L.P.
By: Mack-Cali Realty Corporation,
its general partner
Date: October 1, 2002 By: /s/ Barry Lefkowitz
--------------------------------
Barry Lefkowitz
Executive Vice President and
Chief Financial Officer
<Page>
EXHIBIT INDEX
<Table>
<Caption>
Exhibit Number Exhibit Title
-------------- -------------
10.1 Amended and Restated Revolving Credit
Agreement among Mack-Cali Realty, L.P. and
JPMorgan Chase Bank, Fleet National Bank,
and other lenders that may become party
to the Amended and Restated Revolving Credit
Agreement, dated September 27, 2002.
99.1 Press Release issued by Mack-Cali Realty
Corporation, dated September 30, 2002.
</Table>