Aecon Group Inc. announced that it has completed its previously announced public offering of $150 million aggregate principal amount of 5.5% convertible unsecured subordinated debentures due December 31, 2018. The offering of debentures was completed on a bought deal basis through a syndicate of underwriters led by TD Securities Inc. and GMP Securities L.P. Aecon has also granted the underwriters an over-allotment option to purchase up to an additional $22.5 million aggregate principal amount of debentures, exercisable in whole or in part for a period of 30 days following closing of the offering, to cover over-allotments, if any. As previously announced…