Southern Tioga School District 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) Ameriprise Financial(800) 862-7919 Invesco OppenheimerFunds(800) 959-4246 Kades-Margolis Corp.(800) 433-1828 Security Benefit Group(800) 888-2461 Thrivent Financial(800) 847-4836 Roth 403(b) Invesco OppenheimerFunds(800) 959-4246 Kades-Margolis Corp.(800) 433-1828 Security Benefit Group(800) 888-2461