X0101 24F-2NT LIVE 63068 XXXXXXXX false N-1A MFS Series Trust IV 111 Huntington Avenue Boston MA X1 02199 MFS MID CAP GROWTH FUND S000002434 A C000006504 R4 C000006505 B C000006509 C C000006510 I C000006511 R1 C000006513 R2 C000006515 R3 C000006516 R6 C000124428 MFS U.S. GOVERNMENT MONEY MARKET FUND S000002435 MFS U.S.Government Money Market Fund C000006517 MFS GLOBAL NEW DISCOVERY FUND S000035048 C C000107819 I C000107820 R1 C000107821 R2 C000107822 R3 C000107823 R4 C000107824 R6 C000124429 A C000107817 B C000107818 MFS BLENDED RESEARCH EMERGING MARKETS EQUITY FUND S000050655 A C000159993 B C000159994 C C000159995 I C000159996 R1 C000159997 R2 C000159998 R3 C000159999 R4 C000160000 R6 C000160001 MFS BLENDED RESEARCH INTERNATIONAL EQUITY FUND S000050657 A C000160011 B C000160012 C C000160013 I C000160014 R1 C000160015 R2 C000160016 R3 C000160017 R4 C000160018 R6 C000160019 811-2594 002-54607 08/31/2022 false false 6135476281.00 3709897050.00 0.00 3709897050.00 2425579231.00 0.00 0.0001102 267298.83 0 267298.83 David L. DiLorenzo David L. DiLorenzo President 11/10/2022