NPORT-P false 0000783740 XXXXXXXX S000002510 C000006890 C000006888 C000006898 C000006889 C000006899 C000006896 C000006894 C000006892 C000006887 C000006891 C000006893 MFS SERIES TRUST X 811-04492 0000783740 5493001MUVNRNUPJY164 111 HUNTINGTON AVENUE 24TH FLOOR BOSTON 02199 617-954-5000 MFS Conservative Allocation Fund S000002510 6SXR8MWKSFNSF7VYA207 2021-05-31 2020-08-31 N 3399285152.14 3852710.34 3395432441.80 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 N MFS International Growth Fund PTNAY8DC4VJYOKVJ5B83 552746356 1737407.84700000 NS USD 67776280.11000000 1.996101565020 Long EC RF US N 1 N N N MFS New Discovery Value Fund LRMRW30Z8FYTIFW1W860 552982696 2463521.65400000 NS USD 33602435.36000000 0.989636399367 Long EC RF US N 1 N N N MFS Commodity Strategy Fund T0OEQ8I3F6DXUJCOV412 55276T826 14092582.00500000 NS USD 69899206.74000000 2.058624576931 Long EC RF US N 1 N N N MFS Ltd Maturity Fund 7ER38PJ2TK60L3Y32478 55274K801 54992963.10900000 NS USD 335457074.96000000 9.879656883473 Long EC RF US N 1 N N N MFS Emerging Markets Debt Fund 509D6AOZZ4SJ08T5BZ82 552746364 6741219.96500000 NS USD 100376765.28000000 2.956229199093 Long EC RF US N 1 N N N MFS Research Bond Fund FJAEEQMSDDUK9QL2E558 55274K603 43495596.43400000 NS USD 501939182.85000000 14.78277631652 Long EC RF US N 1 N N N MFS Value Fund HV6C0RMURVKFUQ3UTB42 55273H353 4922148.56800000 NS USD 203333957.34000000 5.988455397811 Long EC RF US N 1 N N N MFS Research International Fund UH91KW1VFNZQF5FY7237 55273H361 6763246.71600000 NS USD 135197301.85000000 3.981740298691 Long EC RF US N 1 N N N MFS Global Real Estate Fund ROYDM6SL56ZXYAENS860 552982720 4102293.74000000 NS USD 67646823.77000000 1.992288903681 Long EC RF US N 1 N N N MFS Government Securities Fund UWWK6TDSOPDQSQMMEB12 552982712 32047787.75400000 NS USD 334899382.03000000 9.863232085173 Long EC RF US N 1 N N N MFS Research Fund XFPOOG2XVG5TW1LZ8588 552981391 4144798.13600000 NS USD 208317554.32000000 6.135228955094 Long EC RF US N 1 N N N MFS High Income Fund DMVGFZCV67YA34LSI126 552984684 49762594.95500000 NS USD 167699945.00000000 4.938986355184 Long EC RF US N 1 N N N MFS Inflation Adjusted Bond Fund VOHO802M9IKG3IZTEN75 55274K884 29703944.04700000 NS USD 336248646.61000000 9.902969721045 Long EC RF US N 1 N N N MFS New Discovery Fund ZVEMRLDGMDO1D1VDSU87 55273H346 912754.56400000 NS USD 34492994.97000000 1.015864563976 Long EC RF US N 1 N N N MFS Growth Fund K4ZYIH3WSXKUSPKIPM59 552985673 1312279.16800000 NS USD 212772944.30000000 6.266446113921 Long EC RF US N 1 N N N MFS International Value Fund 7540QFSKYNTDFH7HAK24 552746349 1345594.44400000 NS USD 67279722.20000000 1.981477274344 Long EC RF US N 1 N N N MFS Mid Cap Growth Fund XPX0WXKIO6CLKBLYF666 552987554 5157046.97500000 NS USD 136713315.31000000 4.026388910789 Long EC RF US N 1 N N N MFS Institutional Money Market Portfolio 5L2W638H85N8T1136O07 55291X109 1603570.28800000 NS USD 1603570.29000000 0.047227277157 Long STIV RF US N 1 N N N MFS Global Bond Fund XE280U8NKIY4V6K1JN70 552743882 17540608.04100000 NS USD 167863618.95000000 4.943806770633 Long EC RF US N 1 N N N MFS Emerging Markets Debt Local Currency Fund 5493001KPK8UJ27DMD68 552746323 10404901.56400000 NS USD 67319713.12000000 1.982655060111 Long EC RF US N 1 N N N MFS Mid Cap Value Fund BXHSCSBXYY1DOHP6E209 55273W475 5929956.53000000 NS USD 134906511.06000000 3.973176123288 Long EC RF US N 1 N N N 2020-09-28 MFS SERIES TRUST X Kasey Phillips Kasey Phillips Assistant Treasurer XXXX