NPORT-P false 0000783740 XXXXXXXX S000002510 C000006898 C000006899 C000006891 C000006889 C000006890 C000006888 C000006893 C000006896 C000006894 C000006887 C000006892 MFS SERIES TRUST X 811-04492 0000783740 5493001MUVNRNUPJY164 111 HUNTINGTON AVENUE 24TH FLOOR BOSTON 02199 617-954-5000 MFS Conservative Allocation Fund S000002510 6SXR8MWKSFNSF7VYA207 2020-05-31 2020-05-31 N 3022752969.51 2798935.87 3019954033.64 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 Institutional Money Market Portfolio 5L2W638H85N8T1136O07 55291X109 0.98200000 NS USD 0.98000000 0.000000032450 Long STIV RF US N 1 N N N MFS High Income Fund DMVGFZCV67YA34LSI126 552984684 46238028.65700000 NS USD 150273593.14000000 4.976022531007 Long EC RF US N 1 N N N MFS Emerging Markets Debt Local Currency Fund 5493001KPK8UJ27DMD68 552746323 9882544.74200000 NS USD 61864730.08000000 2.048532176015 Long EC RF US N 1 N N N MFS New Discovery Value Fund LRMRW30Z8FYTIFW1W860 552982696 2418052.13300000 NS USD 31869927.11000000 1.055311662197 Long EC RF US N 1 N N N MFS Commodity Strategy Fund T0OEQ8I3F6DXUJCOV412 55276T826 14104211.76200000 NS USD 59519773.64000000 1.970883429912 Long EC RF US N 1 N N N MFS Global Bond Fund XE280U8NKIY4V6K1JN70 552743882 16294445.10000000 NS USD 147953561.51000000 4.899199122301 Long EC RF US N 1 N N N MFS Government Securities Fund UWWK6TDSOPDQSQMMEB12 552982712 27369244.70600000 NS USD 285461222.28000000 9.452502226861 Long EC RF US N 1 N N N MFS Mid Cap Value Fund BXHSCSBXYY1DOHP6E209 55273W475 6054627.30300000 NS USD 126723349.45000000 4.196201267913 Long EC RF US N 1 N N N MFS Mid Cap Growth Fund XPX0WXKIO6CLKBLYF666 552987554 5465779.75000000 NS USD 128445824.13000000 4.253237721475 Long EC RF US N 1 N N N MFS International Value Fund 7540QFSKYNTDFH7HAK24 552746349 1396929.30000000 NS USD 62344954.66000000 2.064433894209 Long EC RF US N 1 N N N MFS Research Bond Fund FJAEEQMSDDUK9QL2E558 55274K603 39428416.84400000 NS USD 443569689.50000000 14.68796162322 Long EC RF US N 1 N N N MFS New Discovery Fund ZVEMRLDGMDO1D1VDSU87 55273H346 997536.33200000 NS USD 32669314.87000000 1.081781858468 Long EC RF US N 1 N N N MFS Inflation Adjusted Bond Fund VOHO802M9IKG3IZTEN75 55274K884 26878854.20900000 NS USD 292173145.25000000 9.674754714655 Long EC RF US N 1 N N N MFS Emerging Markets Debt Fund 509D6AOZZ4SJ08T5BZ82 552746364 6491450.18600000 NS USD 91139960.61000000 3.017925425180 Long EC RF US N 1 N N N MFS Ltd Maturity Fund 7ER38PJ2TK60L3Y32478 55274K801 48924095.10100000 NS USD 293544570.61000000 9.720166841618 Long EC RF US N 1 N N N MFS Research Fund XFPOOG2XVG5TW1LZ8588 552981391 4209919.24200000 NS USD 186667819.19000000 6.181147696642 Long EC RF US N 1 N N N MFS Growth Fund K4ZYIH3WSXKUSPKIPM59 552985673 1377926.91500000 NS USD 187108695.79000000 6.195746481759 Long EC RF US N 1 N N N MFS Value Fund HV6C0RMURVKFUQ3UTB42 55273H353 4797704.30900000 NS USD 185767110.84000000 6.151322462881 Long EC RF US N 1 N N N MFS International Growth Fund PTNAY8DC4VJYOKVJ5B83 552746356 1818830.87700000 NS USD 61476483.64000000 2.035676137954 Long EC RF US N 1 N N N MFS Research International Fund UH91KW1VFNZQF5FY7237 55273H361 7044631.45700000 NS USD 124549084.16000000 4.124204632673 Long EC RF US N 1 N N N MFS Global Real Estate Fund ROYDM6SL56ZXYAENS860 552982720 4107262.15000000 NS USD 61198206.04000000 2.026461507635 Long EC RF US N 1 N N N 2020-06-12 MFS SERIES TRUST X Kasey Phillips Kasey Phillips Assistant Treasurer