Darke County ESC 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) American Fidelity Assurance Co.(800) 654-8489 Ameriprise Financial(800) 862-7919 Invesco OppenheimerFunds(800) 959-4246 Metropolitan Life Insurance Company(833) 642-1008 Vanguard Investments - Plan Number: 430993(800) 569-4903 VOYA Financial(800) 584-6001 457(b) VOYA Financial(800) 584-6001