what are class f shares
1 Class D and Class F share funds can be purchased at most discount brokerage firms through their âmutual fund supermarketâ platforms. 2  Many D and F share class funds pay an annual 12b-1 fee to the brokerage firm (not the advisor that may recommend the fund). These ongoing expenses vary for each fund. 2  Class D and Class F share funds can be purchased at most discount brokerage firms through their âmutual fund supermarketâ platforms. 3  Many D and F share class funds pay an annual 12b-1 fee to the brokerage firm (not the advisor that may recommend the fund).