EXHIBIT 3.1.5 LIBERTY PROPERTY LIMITED PARTNERSHIP PARTNERSHIP INTERESTS AS OF DECEMBER 31, 1998 Number of Partnership Limited Partners Interests Percentage - ---------------------------------------- ----------- ---------- Balitsaris, Peter 34,969 0.0461% Carr, Clai 118,198 0.1557% Castorina, John 11,094 0.0146% Congdon, George 0 0.0000% The Estate for George F. Congdon 314,276 0.4141% Denny, Joseph 260,250 0.3429% Felix, Jill 195,043 0.2570% Fenza, Robert 187,670 0.2473% Fitzgerald, Ward 9,344 0.0123% Gildea, Larry 93,319 0.1229% Goldschmidt, Robert 22,895 0.0302% Hagan, Michael 9,343 0.0123% Hammers, David 233,133 0.3072% Kiel, Bob 14,491 0.0191% Kline, Earl 18,820 0.0248% Lutz, Jim 27,981 0.0369% Mazzerralli, James 13,445 0.0177% Messaros, Steve 0 0.0000% Messaros, Sharron 7,245 0.0095% Morrissey, Mary Beth 9,344 0.0123% Price, Leslie 167,964 0.2213% Reichert, Joseph 27,242 0.0359% Rouse & Assoc., Inc. 4,652 0.0061% Rouse, Willard 453,320 0.5973% Trust Congdon Children 92,825 0.1223% Trust Hammers Children 89,651 0.1181% Trust for Mary Rouse 11,223 0.0148% Trust for Anne Rouse 11,223 0.0148% Trust for Rouse Younger Children 67,338 0.0887% Trust for Laurie Hammers 5,506 0.0073% Weitzmann, Mike 42,312 0.0557% R&A - Southeast Limited Partnership 153,909 0.2028% Liberty Special Purpose Corp. 10,574 0.0139% Lingerfelt, Rebecca 8,076 0.0106% Trust J. Ryan Lingerfelt 15,625 0.0206% Trust Justin M. Lingerfelt 15,625 0.0206% Trust Daniel K. Lingerfelt 15,625 0.0206% Trust Catherine E. Lingerfelt 15,625 0.0206% Lingerfelt, Alan T. 317,500 0.4183% Lingerfelt, L. Harold 164,375 0.2166% Carpenter, James J. 78,750 0.1038% Lingerfelt, David L. 30,674 0.0404% Ferguson, Morris U. 6,000 0.0079% Lingerfelt, Carl C. 12,500 0.0165% Wright, Murray H. 7,500 0.0099% Latimer, Erle Marie 12,500 0.0165% Mazel Investments LLC 28,025 0.0369% Stewart R. Stender 57,613 0.0759% Robert C. Lux 57,612 0.0759% NWBC Associates, Inc. 28,191 0.0371% EXHIBIT 3.1.5 - Continued LIBERTY PROPERTY LIMITED PARTNERSHIP PARTNERSHIP INTERESTS AS OF DECEMBER 31, 1998 Number of Partnership Limited Partners Interests Percentage - ---------------------------------------- ----------- ---------- 330 Associates, Inc. 3,407 0.0045% APEX Asset Management Corp. 85,051 0.1121% LPC of S.C., Inc. 203,742 0.2684% Libco of Florida, Inc. 283,238 0.3732% Southchase Development Corp. 0 0.0000% Rouse & Associates Maryland Partnership 20,000 0.0264% A. Carl Helwig 356,737 0.4700% James J. Sunday 79,348 0.1045% Charles J. Walters 290,723 0.3830% Dennis Doyle 19,380 0.0255% Stanford Baratz 9,044 0.0119% Walton Street Real Estate Fund II, LP 311,562 0.4105% Walton Street Managers II, LP 3,147 0.0041% Total Limited Partner Interests 5,255,794 6.9245% General Partner Liberty Property Trust - Preferred Units 5,000,000 6.5875% Liberty Property Trust GP 86.4880% 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 to the general partner.