Sandridge School District No. 172 Authorized Investment Providers For specific investment provider information, please click on the investment provider name of your choice to visit the company's website. 403(b) Corebridge Financial (formerly AIG Retirement Services-VALIC)(800) 448-2542 Equitable(800) 628-6673 Horace Mann Insurance Company(800) 999-1030 Lincoln Investment Planning, LLC(800) 242-1421 Metropolitan Life Insurance Company(833) 642-1008