X0306 4 2012-08-08 0 0000921112 LIBERTY PROPERTY TRUST LRY 0001248361 ALBURGER GEORGE J JR C/O LIBERTY PROPERTY TRUST 500 CHESTERFIELD PARKWAY MALVERN PA 19355 0 1 0 0 Exec. VP, CFO Common Shares of Beneficial Interest ($0.001 par value) 2012-08-08 4 S 0 5000 35.9849 D 197596 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person. Represents the weighted average of a range of sale prices per share from $35.86 to $36.21. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company or any shareholder of the Company, upon request, full information regarding the number of common shares sold at each separate price. George J. Alburger, Jr. by Mary Beth Morrissey as Attorney-in-Fact 2012-08-08