NPORT-P false 0000783740 XXXXXXXX S000002507 C000006860 C000006855 C000006862 C000006863 C000006858 C000006852 C000006851 C000006857 C000006856 C000006854 C000006853 MFS SERIES TRUST X 811-04492 0000783740 5493001MUVNRNUPJY164 111 HUNTINGTON AVENUE 24TH FLOOR BOSTON 02199 617-954-5000 MFS Moderate Allocation Fund S000002507 6W9PGRTO8WIPR5M6Z061 2020-05-31 2020-05-31 N 5455060593.87 3152067.78 5451908526.09 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 Debt Local Currency Fund 5493001KPK8UJ27DMD68 552746323 17452252.69100000 NS USD 109251101.85000000 2.003905629142 Long EC RF US N 1 N N N MFS Institutional Money Market Portfolio 5L2W638H85N8T1136O07 55291X109 3117822.97500000 NS USD 3118134.76000000 0.057193453358 Long STIV RF US N 1 N N N MFS International Growth Fund PTNAY8DC4VJYOKVJ5B83 552746356 4904566.63000000 NS USD 165774352.09000000 3.040666425283 Long EC RF US N 1 N N N MFS Government Securities Fund UWWK6TDSOPDQSQMMEB12 552982712 47016329.33000000 NS USD 490380314.91000000 8.994654120906 Long EC RF US N 1 N N N MFS Mid Cap Growth Fund XPX0WXKIO6CLKBLYF666 552987554 17623939.49200000 NS USD 414162578.06000000 7.596653100066 Long EC RF US N 1 N N N MFS Mid Cap Value Fund BXHSCSBXYY1DOHP6E209 55273W475 18958453.47100000 NS USD 396800431.15000000 7.278193118081 Long EC RF US N 1 N N N MFS International New Discovery Fund RC53GXLQZ5LVIZBRHR66 552981383 1818237.83600000 NS USD 57438133.24000000 1.053541763680 Long EC RF US N 1 N N N MFS Value Fund HV6C0RMURVKFUQ3UTB42 55273H353 11376295.01200000 NS USD 440490142.86000000 8.079558575717 Long EC RF US N 1 N N N MFS International Value Fund 7540QFSKYNTDFH7HAK24 552746349 3758334.23200000 NS USD 167734456.77000000 3.076619058579 Long EC RF US N 1 N N N MFS New Discovery Fund ZVEMRLDGMDO1D1VDSU87 55273H346 2815554.38500000 NS USD 92209406.11000000 1.691323426809 Long EC RF US N 1 N N N MFS New Discovery Value Fund LRMRW30Z8FYTIFW1W860 552982696 6551495.45800000 NS USD 86348710.14000000 1.583825365498 Long EC RF US N 1 N N N MFS Emerging Markets Debt Fund 509D6AOZZ4SJ08T5BZ82 552746364 11470559.94300000 NS USD 161046661.60000000 2.953950177801 Long EC RF US N 1 N N N MFS Global Real Estate Fund ROYDM6SL56ZXYAENS860 552982720 10822910.96100000 NS USD 161261373.32000000 2.957888463247 Long EC RF US N 1 N N N MFS Research International Fund UH91KW1VFNZQF5FY7237 55273H361 18849155.71400000 NS USD 333253073.02000000 6.112594725777 Long EC RF US N 1 N N N MFS Commodity Strategy Fund T0OEQ8I3F6DXUJCOV412 55276T826 36262489.01200000 NS USD 153027703.63000000 2.806864841874 Long EC RF US N 1 N N N MFS Research Bond Fund FJAEEQMSDDUK9QL2E558 55274K603 36948550.30900000 NS USD 415671190.98000000 7.624324380917 Long EC RF US N 1 N N N MFS High Income Fund DMVGFZCV67YA34LSI126 552984684 82331162.95100000 NS USD 267576279.59000000 4.907937803973 Long EC RF US N 1 N N N MFS Global Bond Fund XE280U8NKIY4V6K1JN70 552743882 28382453.01100000 NS USD 257712673.34000000 4.727017559203 Long EC RF US N 1 N N N MFS Inflation Adjusted Bond Fund VOHO802M9IKG3IZTEN75 55274K884 33472357.83200000 NS USD 363844529.63000000 6.673709360471 Long EC RF US N 1 N N N MFS Research Fund XFPOOG2XVG5TW1LZ8588 552981391 10195490.26100000 NS USD 452068038.17000000 8.291922654362 Long EC RF US N 1 N N N MFS Growth Fund K4ZYIH3WSXKUSPKIPM59 552985673 3376490.31400000 NS USD 458493619.74000000 8.409781960681 Long EC RF US N 1 N N N 2020-06-12 MFS SERIES TRUST X Kasey Phillips Kasey Phillips Assistant Treasurer