The Macerich Co., owners of Southridge Mall in Des Moines, reported net income of $43.9 million for the quarter ended Sept. 30, compared with net income of $12.9 million a year ago. The company, which is based in Santa Monica, Calif., and has it origins in Iowa, said funds from operations for the recent quarter were $112.9 million, compared with $104.2 million a year ago. Annual sales per square foot at its malls increased 9.4 percent to $511 for the year ended Sept. 30 and mall occupancy was at 93 percent, compared with 91.9 percent for the same year-ago period.