Exhibit 21.1
CORPORATE OFFICE PROPERTIES TRUST
 
 
 
SUBSIDIARIES OF REGISTRANT
 
 
 
 
 
 
 
Alabama
 
 
 
COPT Bridge Street Office, LLC
 
 
 
 
 
 
 
Colorado
 
 
 
Colorado Land Acquisition, LLC
 
 
 
COPT Academy Ridge, LLC
 
 
 
COPT Aerotech, LLC
 
 
 
COPT Cresterra 3535, LLC
 
 
 
COPT Cresterra Master LLC
 
 
 
COPT Interquest, LLC
 
 
 
COPT Interquest III, LLC
 
 
 
COPT Interquest IV, LLC
 
 
 
COPT Interquest Epic I, LLC
 
 
 
COPT Interquest Hybrid I, LLC
 
 
 
COPT Interquest Hybrid II, LLC
 
 
 
COPT Newport, LLC
 
 
 
COPT Newport C, LLC
 
 
 
COPT Newport D, LLC
 
 
 
COPT Northcreek, LLC
 
 
 
COPT Patriot Park at Galley, LLC
 
 
 
COPT Patriot Park I, LLC
 
 
 
COPT Patriot Park II, LLC
 
 
 
COPT Patriot Park V, LLC
 
 
 
COPT Patriot Park VI, LLC
 
 
 
COPT Patriot Park VII, LLC
 
 
 
Patriot Park, LLC
 
 
 
9965 Federal Drive, LLC
 
 
 
 
 
 
 
Delaware
 
 
 
Airport Square Holdings I, LLC
 
 
 
Airport Square Holdings VI and VII, LLC
 
 
 
Blue Bell Investment Company, LP
 
 
 
COPT Acquisitions, Inc.
 
 
 
COPT Colgate General, LLC
 
 
 
COPT Concourse, LLC
 
 
 
COPT DC-6, LLC
 
 
 
COPT Gateway, LP
 
 
 
COPT Gateway Commerce, LLC
 
 
 
COPT Maritime I & II, LLC
 
 
 
Corporate Gateway, LP
 
 
 
Corporate Office Properties, LP
 
 
 
Corporate Office Properties Holdings, Inc.
 
 
 
Crown Point, L.L.C.
 
 
 
Delaware Airport III, LLC
 
 
 
Delaware Airport VIII, LLC
 
 
 
Delaware Airport IX, LLC
 
 
 
Great Mills I, L.L.C.
 
 
 
Great Mills II, L.L.C.
 
 
 
Great Mills III, L.L.C.
 
 
 





Great Mills IV, L.L.C.
 
 
 
Great Mills V, L.L.C.
 
 
 
Harrisburg Corporate Gateway Partners, LP
 
 
 
Harrisburg Investors II, LLC
 
 
 
Harrisburg Investors III, LLC
 
 
 
LW Redstone Company, LLC
 
 
 
Opportunity Invest Ventures, LLC
 
 
 
Powerloft Holdings, LLC
 
 
 
Redstone Gateway 1000, LLC
 
 
 
Redstone Gateway 1100, LLC
 
 
 
Redstone Gateway 1200, LLC
 
 
 
Redstone Gateway 6500, LLC
 
 
 
Redstone Gateway 7200, LLC
 
 
 
 
 
 
 
Maryland
 
 
 
1099 Winterson, LLC
 
 
 
110 Thomas Johnson, LLC
 
 
 
1190 Winterson, LLC
 
 
 
1199 Winterson, LLC
 
 
 
131 Parkway, LLC
 
 
 
132, LLC
 
 
 
133 Parkway, LLC
 
 
 
134, LLC
 
 
 
135 Parkway, LLC
 
 
 
1362 Mellon, LLC
 
 
 
141 Parkway, LLC
 
 
 
1460 Dorsey Road, LLC
 
 
 
1550 Nursery LLC
 
 
 
221, LLC
 
 
 
2500 Riva Trust
 
 
 
2691 Technology, LLC
 
 
 
2701 Technology, LLC
 
 
 
2711 Technology, LLC
 
 
 
2720 Technology, LLC
 
 
 
2730 Hercules, LLC
 
 
 
302 Sentinel, LLC
 
 
 
304 Sentinel, LLC
 
 
 
306 Sentinel, LLC
 
 
 
318 Sentinel, LLC
 
 
 
320 Sentinel, LLC
 
 
 
322 Sentinel, LLC
 
 
 
45310 Abell House, LLC
 
 
 
5825 URC Borrower, LLC
 
 
 
5850 URC Borrower, LLC
 
 
 
67 Financing, LLC
 
 
 
6700 Alexander Bell, LLC
 
 
 
6711 CG, LLC
 
 
 
6711 Gateway Funding, LLC
 
 
 
6711 Gateway, LLC
 
 
 
6721 CGD., LLC
 
 
 
6721 Gateway, LLC
 
 
 
6731 CG, LLC
 
 
 
6731 Gateway, LLC
 
 
 
6741 Gateway, LLC
 
 
 





6940 CGD, LLC
 
 
 
6950 CG, LLC
 
 
 
7000 CG, LLC
 
 
 
7000 Honeys, LLC
 
 
 
7015 Albert Einstein Drive, LLC
 
 
 
7130 Columbia Gateway, LLC
 
 
 
7150-70 Riverwood. LLC
 
 
 
7200 Riverwood, LLC
 
 
 
7205 Riverwood, LLC
 
 
 
7240 Parkway Drive Enterprises, LLC
 
 
 
7318 Parkway Drive Enterprises, LLC
 
 
 
7320 Parkway Drive Enterprises, LLC
 
 
 
7320 PD, LLC
 
 
 
7740 Milestone LLC
 
 
 
7878 Milestone Parkway, LLC
 
 
 
7880 Milestone Parkway, LLC
 
 
 
800 International, LLC
 
 
 
8027 Corporate Drive Business Trust
 
 
 
8029 Corporate, LLC
 
 
 
8110 Corporate, LLC
 
 
 
8140 Corporate, LLC
 
 
 
849 International, LLC
 
 
 
8621 RFD, LLC
 
 
 
8661 RFD, LLC
 
 
 
881 Elkridge Landing, LLC
 
 
 
900 International, LLC
 
 
 
930 International, LLC
 
 
 
9690 Deereco Road, LLC
 
 
 
999 Corporate, LLC
 
 
 
Aerotech Manager, LLC
 
 
 
Airport Square II, LLC
 
 
 
Airport Square IV, LLC
 
 
 
Airport Square Partners, LLC
 
 
 
Airport Square Storms, LLC
 
 
 
Airport Square V, LLC
 
 
 
Airport Square X, LLC
 
 
 
Airport Square XI, LLC
 
 
 
Airport Square XIII, LLC
 
 
 
Airport Square XIV, LLC
 
 
 
Airport Square XIX, LLC
 
 
 
Airport Square XV, LLC
 
 
 
Airport Square XX, LLC
 
 
 
Airport Square XXI, LLC
 
 
 
Airport Square XXII, LLC
 
 
 
Airport Square, LLC
 
 
 
AP#5 Lot A, LLC
 
 
 
AP#5 Lot B, LLC
 
 
 
AP#5 Lot C, LLC
 
 
 
Arundel Preserve #5, LLC
 
 
 
ASI, LLC
 
 
 
Atrium Building, LLC
 
 
 
Campbell Boulevard I Business Trust
 
 
 
Campbell Boulevard II Business Trust
 
 
 
Campbell Boulevard Trust
 
 
 





Campbell Corporate Center 1-2 Business Trust
 
 
 
Canton Crossing Retail, LLC
 
 
 
Clarks Hundred II, LLC
 
 
 
Clarks Hundred, LLC
 
 
 
Columbia Equity Finance, LLC
 
 
 
Columbia Gateway S-28, LLC
 
 
 
COMI Investments LLC
 
 
 
Commons Office 6-B, LLC
 
 
 
Commons Office Research, LLC
 
 
 
Concourse 1304, LLC
 
 
 
COPT Aberdeen, LLC
 
 
 
COPT Arundel Preserve, LLC
 
 
 
COPT AP 9, LLC
 
 
 
COPT Babcock Business Trust
 
 
 
COPT Baltimore County I, LLC
 
 
 
COPT Baltimore County II, LLC
 
 
 
COPT CC 1600, LLC
 
 
 
COPT CC Bulkhead LLC
 
 
 
COPT CC D1 LLC
 
 
 
COPT CC Holding LLC
 
 
 
COPT CC Parking LLC
 
 
 
COPT CC Tower LLC
 
 
 
COPT CCW I LLC
 
 
 
COPT CCW II LLC
 
 
 
COPT CCW III LLC
 
 
 
COPT Chantilly I Manager, LLC
 
 
 
COPT Chantilly II Manager, LLC
 
 
 
COPT Data Management, LLC
 
 
 
COPT Development & Construction Services, LLC
 
 
 
COPT Frederick, LLC
 
 
 
COPT Gate 63, LLC
 
 
 
COPT Gate 6700-6708-6724, LLC
 
 
 
COPT General, LLC
 
 
 
COPT Harbour's Edge LLC
 
 
 
COPT Harrisburg GP, LLC
 
 
 
COPT Harrisburg L.P.
 
 
 
COPT Hunt Valley GP, LLC
 
 
 
COPT Huntsville, LLC
 
 
 
COPT Indian Head, LLC
 
 
 
COPT-Kirk AP#5 LLC
 
 
 
COPT Northgate A, LLC
 
 
 
COPT Northgate B, LLC
 
 
 
COPT Northgate C, LLC
 
 
 
COPT Northgate D, LLC
 
 
 
COPT Northgate H, LLC
 
 
 
COPT Northgate I, LLC
 
 
 
COPT Opportunity Invest I, LLC
 
 
 
COPT Powerhouse LLC
 
 
 
COPT Pres Investment, LLC
 
 
 
COPT Property Management Services, LLC
 
 
 
COPT Renovation, LLC
 
 
 
COPT Riverwood, LLC
 
 
 
COPT T-11, LLC
 
 
 
COPT-FD Indian Head, LLC
 
 
 





COPT Virtru, LLC
 
 
 
Cornucopia Holdings II, LLC
 
 
 
Cornucopia Holdings, LLC
 
 
 
Corporate Center I Limited Partnership
 
 
 
Corporate Center I, LLC
 
 
 
Corporate Development Services, LLC
 
 
 
Corporate Gatespring II, LLC
 
 
 
Corporate Gatespring, LLC
 
 
 
Corporate Office Management, Inc.
 
 
 
Corporate Office Services, LLC
 
 
 
Corporate Paragon, LLC
 
 
 
Corporate Place B Equity Affiliates, LLC
 
 
 
Corporate Place I Business Trust
 
 
 
Corporate Place III Business Trust
 
 
 
Corporate Place IV Business Trust
 
 
 
Corporate Property, LLC
 
 
 
Enterprise Campus Developer, LLC
 
 
 
Fifth Exploration, L.L.C.
 
 
 
Fourth Exploration, L.L.C.
 
 
 
Franklin Ridge No. 1 Business Trust
 
 
 
Franklin Ridge No. 2 Business Trust
 
 
 
Franklin Ridge No. 3 Business Trust
 
 
 
Franklin Ridge No. 4 Business Trust
 
 
 
Franklin Ridge Open Space Business Trust
 
 
 
Franklin Ridge V Business Trust
 
 
 
Gateway 44, LLC
 
 
 
Gateway 67, LLC
 
 
 
Gateway 70 Holdings, LLC
 
 
 
Gateway 70, LLC
 
 
 
Gateway Crossing 95, LLC
 
 
 
Honeyland 108, LLC
 
 
 
Huntsville Holdings, LLC
 
 
 
Jolly COPT I, LLC
 
 
 
Jolly COPT II, LLC
 
 
 
Lot 401 Business Trust
 
 
 
M Square 5825, LLC
 
 
 
M Square 5850, LLC
 
 
 
M Square Associates, LLC
 
 
 
M Square NOAA, LLC
 
 
 
Maritime Holdings, LLC
 
 
 
McLean Ridge I Business Trust
 
 
 
McLean Ridge II Business Trust
 
 
 
McLean Ridge III Business Trust
 
 
 
McLean Ridge IV Business Trust
 
 
 
MOR Forbes 2, LLC
 
 
 
MOR Forbes, LLC
 
 
 
NBP 131, LLC
 
 
 
NBP 132, LLC
 
 
 
NBP 133 LLC
 
 
 
NBP 134, LLC
 
 
 
NBP 135, LLC
 
 
 
NBP 140, LLC
 
 
 
NBP 141, LLC
 
 
 
NBP 191, LLC
 
 
 





NBP 201 Holdings, LLC
 
 
 
NBP 201, LLC
 
 
 
NBP 211 Holdings, LLC
 
 
 
NBP 211, LLC
 
 
 
NBP 220 Holdings, LLC
 
 
 
NBP 220, LLC
 
 
 
NBP 221, LLC
 
 
 
NBP 300, LLC
 
 
 
NBP 302, LLC
 
 
 
NBP 304, LLC
 
 
 
NBP 306, LLC
 
 
 
NBP 308, LLC
 
 
 
NBP 310, LLC
 
 
 
NBP 312 LLC
 
 
 
NBP 314, LLC
 
 
 
NBP 316, LLC
 
 
 
NBP 318, LLC
 
 
 
NBP 320, LLC
 
 
 
NBP 322, LLC
 
 
 
NBP 324, LLC
 
 
 
NBP 410, LLC
 
 
 
NBP 420, LLC
 
 
 
NBP 430, LLC
 
 
 
NBP Huff & Puff, LLC
 
 
 
NBP Lot 3-A, LLC
 
 
 
NBP One, LLC
 
 
 
NBP Retail, LLC
 
 
 
Northcreek Manager, LLC
 
 
 
Nottingham Commons I Holding Corp.
 
 
 
Nottingham Commons II Holding Corp.
 
 
 
Nottingham Ridge Holding Corporation
 
 
 
Nottingham Ridge I Business Trust
 
 
 
Nottingham Ridge II Business Trust
 
 
 
Nottingham Ridge III Business Trust
 
 
 
Nottingham Ridge No. 20 Business Trust
 
 
 
Nottingham Ridge No. 30 Business Trust
 
 
 
One Sellner Road LLC
 
 
 
Park Circle Equities, LLC
 
 
 
Pecan Court, L.L.C.
 
 
 
Philadelphia Road Business Trust
 
 
 
Professional Center I, LLC
 
 
 
Professional Center III, LLC
 
 
 
Red Cedar Building, LLC
 
 
 
RIVA Trustee, LLC
 
 
 
Riverwood Business Center Equity Affiliates, LLC
 
 
 
Sandpiper Limited Partnership
 
 
 
Tech Park I, LLC
 
 
 
Tech Park II, LLC
 
 
 
Tech Park IV, LLC
 
 
 
Third Exploration, L.L.C.
 
 
 
Tyler Ridge I Business Trust
 
 
 
Tyler Ridge I, LLC
 
 
 
Tyler Ridge II A Business Trust
 
 
 
Tyler Ridge II Business Trust
 
 
 





Tyler Ridge II Improvements Business Trust
 
 
 
Tyler Ridge III Business Trust
 
 
 
Tyler Ridge Limited Partnership
 
 
 
Tyler Ridge Water Management Business Trust
 
 
 
W&M Business Trust
 
 
 
White Marsh Business Center 2 Business Trust
 
 
 
White Marsh Business Center Limited Partnership
 
 
 
White Marsh Business Center, LLC
 
 
 
White Marsh Hi-Tech 1 Business Trust
 
 
 
White Marsh Hi-Tech 2 Business Trust
 
 
 
White Marsh Professional Center II, LLC
 
 
 
WMBC 13A Investment Company, LLC
 
 
 
 
 
 
 
Pennsylvania
 
 
 
Colgatedrive Associates, L.P.
 
 
 
COPT Pennlyn, L.P.
 
 
 
 
 
 
 
Texas
 
 
 
COPT 8000 Potranco, L.P.
 
 
 
COPT 8030 Potranco, L.P.
 
 
 
COPT 8100 Potranco, L.P.
 
 
 
COPT San Antonio General, LLC
 
 
 
COPT San Antonio, LP
 
 
 
COPT San Antonio II, L.P.
 
 
 
COPT SA Technology Center, L.P.
 
 
 
COPT Sentry Gateway 100 LP
 
 
 
COPT Westpointe 3A, L.P.
 
 
 
COPT Westpointe 4, L.P.
 
 
 
 
 
 
 
Virginia
 
 
 
13849 Park Center Road, LLC
 
 
 
2900 Towerview Road, LLC
 
 
 
COPT Chantilly, LLC
 
 
 
COPT Chantilly II, LLC
 
 
 
COPT Connect LLC
 
 
 
COPT Dahlgren, LLC
 
 
 
COPT Dahlgren I, LLC
 
 
 
COPT Dahlgren II, LLC
 
 
 
COPT Dahlgren IV, LLC
 
 
 
COPT Dahlgren Land, LLC
 
 
 
COPT DC-8, LLC
 
 
 
COPT DC-11, LLC
 
 
 
COPT Fairview, LLC
 
 
 
COPT Greens I, LLC
 
 
 
COPT Greens II, LLC
 
 
 
COPT Greens III, LLC
 
 
 
COPT McLearen, LLC
 
 
 
COPT Park Meadow, LLC
 
 
 
COPT Parkstone, LLC
 
 
 
COPT Richmond I, LLC
 
 
 
COPT Ridgeview I, LLC
 
 
 
COPT Ridgeview II & III, LLC
 
 
 
COPT Southwest VA, LLC
 
 
 
COPT Stonecroft, LLC
 
 
 





COPT Sunrise, LLC
 
 
 
COPT Waterview I, LLC
 
 
 
COPT Waterview III, LLC
 
 
 
COPT Westbranch, LLC
 
 
 
Patriot Ridge I, LLC
 
 
 
Patriot Ridge II, LLC
 
 
 
Patriot Ridge 7770, LLC
 
 
 
Patriot Ridge Commons, LLC
 
 
 
Patriot Ridge Holdings, LLC
 
 
 
Towerview, LLC
 
 
 
TRC Pinnacle Towers, L.L.C.