THIRTY-THIRD AMENDMENT TO SECOND AMENDED AND RESTATED LIMITED PARTNERSHIP AGREEMENT OF CORPORATE OFFICE PROPERTIES, L.P.

EXHIBIT 99.1

THIRTY-THIRD AMENDMENT

TO

SECOND AMENDED AND RESTATED

LIMITED PARTNERSHIP AGREEMENT

OF

CORPORATE OFFICE PROPERTIES, L.P.

This Thirty-Third Amendment (the “Amendment”) to the Second Amended and Restated Limited Partnership Agreement Of Corporate Office Properties, L.P., a Delaware limited partnership (the Partnership), is made and entered into as of January 25, 2018, by the undersigned.

Recitals

A.    The Partnership is a limited partnership organized under the Delaware Revised Uniform Limited Partnership Act and governed by that certain Second Amended and Restated Limited Partnership Agreement dated as of December 7, 1999, as amended to the date hereof (as amended, the “Partnership Agreement”).

B.    The sole general partner of the Partnership is Corporate Office Properties Trust, a real estate investment trust formed under the laws of the State of Maryland (the “General Partner”).

C.    Pursuant to Section 11.1(B)(iii), the General Partner desires to amend the Partnership Agreement to reflect the admission, substitution, termination and/or withdrawal of various limited partners in accordance with the terms of the Partnership Agreement.

NOW THEREFORE, the General Partner, intending to be legally bound, hereby amends the Partnership Agreement as follows, effective as of the date first set forth above.

Exhibit 1, Schedule of Partners, as attached hereto and by this reference made a part hereof, is hereby substituted for and intended to replace any prior Exhibit 1 attached to a prior Amendment to the Partnership Agreement, and as attached hereto shall be a full and complete listing of all the general and limited partners of the Partnership as of the date of this Amendment, same being intended and hereby superseding all prior Exhibit 1 listings.

In Witness Whereof, the General Partner has executed this Amendment as of the day and year first above written.

Corporate Office Properties Trust, a

Maryland Real Estate Investment Trust

By:    /s/ Xxxxxxx Xxxxxx

Xxxxxxx Xxxxxx

Executive Vice President & Chief Financial Officer

EXHIBIT 1

SCHEDULE OF PARTNERS

(attached hereto)

Exhibit 1 Addendum--33rd Amendment
Schedule of Partners
General Partner	Common Units of Partnership Units			Series I Preferred Units
Corporate Office Properties Trust	101,292,299
Limited Partners and Preferred Limited Partners
Xxx X. Xxxxxxx	431,893
Xxxxxxx Equities, L.P.	1,353,963
Xxxx X. Xxxxxx, III	55,291
LBCW Limited Partnership	141,107
Xxxxxx X. Xxxxxx	294,500
Xxxxx X. Xxxxx	51,589
Xxxxxx Xxxx	4,389
Xxxxxxxx X. Xxxx	13,733
M.O.R. 44 Gateway Associates Limited Partnership	1
Estate of Xxxx Xxxxxxxx	49,434
M.O.R. Commons Limited Partnership	7
Xxxx Xxxxxx	121,411
Housing Affiliates, Inc.	4,402
Reingle Corp.	730
Xxxxxx Xxxxx	2,160
Xxx Xxx XX Enterprises, L.P.	59,528
The Century Trust	59,528
A. Xxxxxxx Xxxxxx, Trustee of the Xxxxxx Survivor's Trust	5,908
Xxxxx Xxxxxxx	1,880
Xxxxxxxx X. Xxxx	2,526
Xxxxx X. Xxxxxxx	262,165
RA & DM, Inc.	2,954
Xxxxxxx Xxxxx	43,817
Xxxxxx Xxxxxxx	23,336
Estate of Xxxxxxx X Xxxxxxxx, III	14,019
Xxxxxxx Xxxxxxx	8,988
Xxxxxx Xxxxxxx	8,988
Xxxxxxx Xxxxxxx	3,899
Xxxxxxxx Xxxxxxx	880
Xxxxxx Xxxxxx	5,427
Xxxx Xxxxx	880
Xxxxx Deutsch	22
Xxxxx Xxxxx	22
Xxxx Property Limited Partnership	221,501
TRC Associates Limited Partnership				352,000
TOTAL	104,543,177			352,000