NPORT-P false 0000783740 XXXXXXXX S000002510 C000006891 C000006899 C000006892 C000006890 C000006889 C000006896 C000006893 C000006898 C000006887 C000006894 C000006888 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 2019-11-30 N 3038206572.15 1513392.79 3036693179.36 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 Value Fund HV6C0RMURVKFUQ3UTB42 55273H353 4259704.77800000 NS USD 187086233.85000000 6.160854021130 Long EC RF US N 1 N N N MFS Mid Cap Value Fund BXHSCSBXYY1DOHP6E209 55273W475 4920831.69900000 NS USD 123906542.18000000 4.080311538293 Long EC RF US N 1 N N N MFS Emerging Markets Debt Fund 509D6AOZZ4SJ08T5BZ82 552746364 6114998.93600000 NS USD 89645884.40000000 2.952088969979 Long EC RF US N 1 N N N MFS International Value Fund 7540QFSKYNTDFH7HAK24 552746349 1339200.65800000 NS USD 61830894.38000000 2.036125835835 Long EC RF US N 1 N N N MFS Growth Fund K4ZYIH3WSXKUSPKIPM59 552985673 1493525.40200000 NS USD 188318617.94000000 6.201437116531 Long EC RF US N 1 N N N MFS High Income Fund DMVGFZCV67YA34LSI126 552984684 43886522.22100000 NS USD 150091906.00000000 4.942610172807 Long EC RF US N 1 N N N MFS New Discovery Fund ZVEMRLDGMDO1D1VDSU87 55273H346 949022.86800000 NS USD 31896658.59000000 1.050374756554 Long EC RF US N 1 N N N MFS Commodity Strategy Fund T0OEQ8I3F6DXUJCOV412 55276T826 11299794.90000000 NS USD 58532937.58000000 1.927522279097 Long EC RF US N 1 N N N MFS Ltd Maturity Fund 7ER38PJ2TK60L3Y32478 55274K801 49737621.68400000 NS USD 298425730.10000000 9.827325728142 Long EC RF US N 1 N N N MFS Global Real Estate Fund ROYDM6SL56ZXYAENS860 552982720 3263226.92900000 NS USD 60304433.65000000 1.985858632669 Long EC RF US N 1 N N N MFS Research Fund XFPOOG2XVG5TW1LZ8588 552981391 4034269.60400000 NS USD 187512851.19000000 6.174902768066 Long EC RF US N 1 N N N MFS New Discovery Value Fund LRMRW30Z8FYTIFW1W860 552982696 1876125.08000000 NS USD 31312527.59000000 1.031138996946 Long EC RF US N 1 N N N MFS Government Securities Fund UWWK6TDSOPDQSQMMEB12 552982712 29743527.41300000 NS USD 297137838.86000000 9.784914751335 Long EC RF US N 1 N N N MFS Inflation Adjusted Bond Fund VOHO802M9IKG3IZTEN75 55274K884 28410071.64000000 NS USD 297737550.79000000 9.804663599657 Long EC RF US N 1 N N N MFS Emerging Markets Debt Local Currency Fund 5493001KPK8UJ27DMD68 552746323 8703398.71700000 NS USD 59183111.28000000 1.948932861648 Long EC RF US N 1 N N N MFS Institutional Money Market Portfolio 5L2W638H85N8T1136O07 55291X109 1254326.08400000 NS USD 1254451.52000000 0.041309788177 Long STIV RF US N 1 N N N MFS Global Bond Fund XE280U8NKIY4V6K1JN70 552743882 16358687.35000000 NS USD 148209707.39000000 4.880628322853 Long EC RF US N 1 N N N MFS Research Bond Fund FJAEEQMSDDUK9QL2E558 55274K603 40550141.74600000 NS USD 447268063.46000000 14.72878677701 Long EC RF US N 1 N N N MFS Mid Cap Growth Fund XPX0WXKIO6CLKBLYF666 552987554 5580121.61200000 NS USD 125385332.62000000 4.129008932223 Long EC RF US N 1 N N N MFS Research International Fund UH91KW1VFNZQF5FY7237 55273H361 6443374.60700000 NS USD 124357129.92000000 4.095149643870 Long EC RF US N 1 N N N MFS International Growth Fund PTNAY8DC4VJYOKVJ5B83 552746356 1708972.07200000 NS USD 62292032.02000000 2.051311355503 Long EC RF US N 1 N N N 2019-12-13 MFS SERIES TRUST X Kasey Phillips Kasey Phillips Assistant Treasurer