EXHIBIT 3.1.9 LIBERTY PROPERTY LIMITED PARTNERSHIP PARTNERSHIP INTERESTS AS OF DECEMBER 31, 2001 NUMBER OF PARTNERSHIP LIMITED PARTNERS INTERESTS % - ---------------------------------------- ----------- --------- Balitsaris, Peter 58,542 0.0671% Carr, Clai 130,000 0.1491% Castorina, John 14,491 0.0166% Denny, Joseph 260,250 0.2985% Felix, Jill 195,043 0.2237% Fenza, Robert 195,043 0.2237% Fitzgerald, Ward 14,491 0.0166% Gildea, Larry 93,319 0.1070% Goldschmidt, Robert 22,895 0.0263% Hagan, Michael 14,491 0.0166% Hammers, David 241,673 0.2772% Kiel, Bob 14,491 0.0166% Kline, Earl 19,128 0.0219% Lutz, Jim 37,312 0.0428% Mazzerralli, James 14,491 0.0166% Messaros, Sharron 7,245 0.0083% Morrissey, Mary Beth 14,491 0.0166% Price, Leslie 175,336 0.2011% Reichert, Joseph 27,242 0.0312% Rouse & Associates, Inc. 5,506 0.0063% Rouse, Willard 457,665 0.5249% Trust for Congdon Children 95,347 0.1094% Trust for Hammers Children 95,348 0.1094% Trust for Mary Rouse 13,621 0.0156% Trust for Anne Rouse 13,621 0.0156% Trust for Rouse Younger Children 81,726 0.0937% Trust for Laurie Hammers 5,506 0.0063% Weitzmann, Mike 42,312 0.0485% Liberty Special Purpose Trust 10,574 0.0121% Thomas, Rebecca 8,076 0.0093% Trust J. Ryan Lingerfelt 15,625 0.0179% Trust Justin M. Lingerfelt 15,625 0.0179% Trust Daniel K. Lingerfelt 15,625 0.0179% Trust Catherine E. Lingerfelt 15,625 0.0179% Lingerfelt, Alan T. 317,500 0.3641% Lingerfelt, L. Harold 164,375 0.1885% The James J. Carpenter Living Trust 78,750 0.0903% Lingerfelt, David L. 30,674 0.0352% Ferguson, Morris U. 6,000 0.0069% Lingerfelt, Carl C. 10,900 0.0125% Wright, Murray H. 7,500 0.0086% Latimer, Erle Marie 12,500 0.0143% Samet, Norman G. 14,013 0.0161% Mann, Bernard 14,012 0.0161% Stender, Stewart R. 57,613 0.0661% Rouse & Associates Maryland Partnership 20,000 0.0229% NUMBER OF PARTNERSHIP LIMITED PARTNERS - Continued INTERESTS % - ---------------------------------------- ----------- --------- Helwig, A. Carl 356,737 0.4091% Sunday, James J. 79,348 0.0910% Walters, Charles J. 290,723 0.3334% Doyle, Margaret A. 19,380 0.0222% Stanford Baratz Revocable Trust 9,044 0.0104% PREFERRED LIMITED PARTNERS - ---------------------------------------- Belair Real Estate Corporation 1,235,000 1.4164% Belcrest Realty Corporation 2,565,000 2.9418% Montebello Realty Corp. 800,000 0.9175% GENERAL PARTNER - ---------------------------------------- Liberty Property Trust - Preferred Units 5,000,000 5.7344% Liberty Property Trust GP 84.4817% -------- TOTAL OWNERSHIP 100.0000% ======== GP - The partnership units for Liberty Property Trust have not been reflected because there is no conversion of units to shares by the general partner.