Larry C. Renfro, a Fidelity Investments executive during the 1980s, returned to the firm as president of a new division, Fidelity Developing Businesses. Mr. Renfro will oversee a number of businesses and initiatives, including Fidelity HR Services, Fidelity Investments Life Insurance and Fidelity Charitable Services, as well as Fidelitys acquisition-focused corporate business development unit, according to a Fidelity news release. Mr. Renfros last position at Fidelity was president of Fidelity Retail Services; he left in 1988. For the past three years, Mr. Renfro served as president and CEO of AARP Services Inc. John Wider, vice president of health products and services, and Jean Alexander, chief marketing officer for both AARP Services and its AARP Financial subsidiary, were named co-leaders of AARP Services, said Anthony Deluise, spokesman. He couldnt immediately say if those appointments would be permanent.