X0101 EFFECT 33 LIVE 2017-02-16 17:00:00

N-14

0001469192 MAINSTAY FUNDS TRUST 333-215497 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000080506 Investor Class 0001469192 MAINSTAY FUNDS TRUST S000028519 MainStay ICAP Equity Fund C000087276 Investor Class 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000080506 Investor Class 0001469192 MAINSTAY FUNDS TRUST S000028520 MainStay ICAP Select Equity Fund C000087283 Investor Class 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000080507 Class A 0001469192 MAINSTAY FUNDS TRUST S000028519 MainStay ICAP Equity Fund C000087277 Class A 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000080507 Class A 0001469192 MAINSTAY FUNDS TRUST S000028520 MainStay ICAP Select Equity Fund C000087284 Class A 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000080508 Class C 0001469192 MAINSTAY FUNDS TRUST S000028519 MainStay ICAP Equity Fund C000087278 Class C 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000080508 Class C 0001469192 MAINSTAY FUNDS TRUST S000028520 MainStay ICAP Select Equity Fund C000087286 Class C 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000080509 Class I 0001469192 MAINSTAY FUNDS TRUST S000028519 MainStay ICAP Equity Fund C000087279 Class I 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000080509 Class I 0001469192 MAINSTAY FUNDS TRUST S000028520 MainStay ICAP Select Equity Fund C000087287 Class I 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000180191 Class B 0001469192 MAINSTAY FUNDS TRUST S000028520 MainStay ICAP Select Equity Fund C000087285 Class B 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000180192 Class R1 0001469192 MAINSTAY FUNDS TRUST S000028519 MainStay ICAP Equity Fund C000087280 Class R1 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000180192 Class R1 0001469192 MAINSTAY FUNDS TRUST S000028520 MainStay ICAP Select Equity Fund C000087288 Class R1 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000180193 Class R2 0001469192 MAINSTAY FUNDS TRUST S000028519 MainStay ICAP Equity Fund C000087281 Class R2 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000180193 Class R2 0001469192 MAINSTAY FUNDS TRUST S000028520 MainStay ICAP Select Equity Fund C000087289 Class R2 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000180194 Class R3 0001469192 MAINSTAY FUNDS TRUST S000028519 MainStay ICAP Equity Fund C000087282 Class R3 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000180194 Class R3 0001469192 MAINSTAY FUNDS TRUST S000028520 MainStay ICAP Select Equity Fund C000087290 Class R3 0001469192 MAINSTAY FUNDS TRUST S000026784 MainStay Epoch U.S. Equity Yield Fund C000180195 Class R6 0001469192 MAINSTAY FUNDS TRUST S000028520 MainStay ICAP Select Equity Fund C000127147 Class R6