Catalyzes the conversion of maltooligosaccharide into the non-reducing saccharide, maltooligosyl trehalose (alpha-maltooligosyl alpha-D-glucoside) by intramolecular transglycosylation. 4-[(1->4)-alpha-D-glucosyl](n-1)-D-glucose = 1-[(1->4)-alpha-D-glucosyl](n-1)-alpha-D-glucose Monomer. Belongs to the glycosyl hydrolase 13 family.