NPORT-P false 0000783740 XXXXXXXX S000002514 C000006916 C000006918 C000006911 C000006920 C000006917 C000006915 C000006914 C000006923 C000006912 C000006913 C000006922 MFS SERIES TRUST X 811-04492 0000783740 5493001MUVNRNUPJY164 111 HUNTINGTON AVENUE 24TH FLOOR BOSTON 02199 617-954-5000 MFS Growth Allocation Fund S000002514 HFZEG2KP0JEQZXYL2D08 2020-05-31 2019-11-30 N 5211384861.17 2845537.70 5208539323.47 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 Emerging Markets Equity Fund GLINMRWNKCBOHYKQ2131 552746331 1421764.49500000 NS USD 50273592.54000000 0.965214802420 Long EC RF US N 1 N N N MFS International Value Fund 7540QFSKYNTDFH7HAK24 552746349 5675894.06500000 NS USD 262056028.98000000 5.031276768885 Long EC RF US N 1 N N N MFS Commodity Strategy Fund T0OEQ8I3F6DXUJCOV412 55276T826 36688182.23400000 NS USD 190044783.97000000 3.648715545136 Long EC RF US N 1 N N N MFS International Growth Fund PTNAY8DC4VJYOKVJ5B83 552746356 7229361.97200000 NS USD 263510243.88000000 5.059196590733 Long EC RF US N 1 N N N MFS Institutional Money Market Portfolio 5L2W638H85N8T1136O07 55291X109 11543859.48700000 NS USD 11545013.87000000 0.221655499805 Long STIV RF US N 1 N N N MFS Inflation Adjusted Bond Fund VOHO802M9IKG3IZTEN75 55274K884 23753138.25500000 NS USD 248932888.91000000 4.779322444361 Long EC RF US N 1 N N N MFS Value Fund HV6C0RMURVKFUQ3UTB42 55273H353 13218091.47700000 NS USD 580538577.67000000 11.14589986974 Long EC RF US N 1 N N N MFS Global Bond Fund XE280U8NKIY4V6K1JN70 552743882 10963105.51500000 NS USD 99325735.97000000 1.906978709413 Long EC RF US N 1 N N N MFS International New Discovery Fund RC53GXLQZ5LVIZBRHR66 552981383 2939663.83800000 NS USD 104740222.55000000 2.010932740356 Long EC RF US N 1 N N N MFS Mid Cap Value Fund BXHSCSBXYY1DOHP6E209 55273W475 18742694.84900000 NS USD 471941056.30000000 9.060909921009 Long EC RF US N 1 N N N MFS New Discovery Fund ZVEMRLDGMDO1D1VDSU87 55273H346 3180499.65500000 NS USD 106896593.40000000 2.052333423275 Long EC RF US N 1 N N N MFS Emerging Markets Debt Local Currency Fund 5493001KPK8UJ27DMD68 552746323 14695216.32100000 NS USD 99927470.98000000 1.918531564688 Long EC RF US N 1 N N N MFS High Income Fund DMVGFZCV67YA34LSI126 552984684 73940377.73100000 NS USD 252876091.84000000 4.855028946417 Long EC RF US N 1 N N N MFS Growth Fund K4ZYIH3WSXKUSPKIPM59 552985673 4627412.53900000 NS USD 583470447.04000000 11.20218953538 Long EC RF US N 1 N N N MFS Research Bond Fund FJAEEQMSDDUK9QL2E558 55274K603 13648125.39500000 NS USD 150538823.11000000 2.890231094765 Long EC RF US N 1 N N N MFS Global Real Estate Fund ROYDM6SL56ZXYAENS860 552982720 11093786.70800000 NS USD 205013178.36000000 3.936097351443 Long EC RF US N 1 N N N MFS Research Fund XFPOOG2XVG5TW1LZ8588 552981391 9100898.42600000 NS USD 423009758.84000000 8.121466164878 Long EC RF US N 1 N N N MFS Emerging Markets Debt Fund 509D6AOZZ4SJ08T5BZ82 552746364 10285003.80500000 NS USD 150778155.78000000 2.894826100296 Long EC RF US N 1 N N N MFS Research International Fund UH91KW1VFNZQF5FY7237 55273H361 19098295.50900000 NS USD 368597103.32000000 7.076784496165 Long EC RF US N 1 N N N MFS New Discovery Value Fund LRMRW30Z8FYTIFW1W860 552982696 6337941.29600000 NS USD 105780240.23000000 2.030900290093 Long EC RF US N 1 N N N MFS Mid Cap Growth Fund XPX0WXKIO6CLKBLYF666 552987554 21182492.59600000 NS USD 475970608.63000000 9.138274265977 Long EC RF US N 1 N N N 2019-12-13 MFS SERIES TRUST X Kasey Phillips Kasey Phillips Assistant Treasurer