NPORT-P false 0000783740 XXXXXXXX S000002507 C000006854 C000006862 C000006857 C000006856 C000006853 C000006863 C000006852 C000006860 C000006858 C000006855 C000006851 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 2019-11-30 N 5720279477.82 3263727.80 5717015750.02 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 Mid Cap Growth Fund XPX0WXKIO6CLKBLYF666 552987554 18216270.39000000 NS USD 409319595.66000000 7.159672345813 Long EC RF US N 1 N N N MFS Emerging Markets Debt Local Currency Fund 5493001KPK8UJ27DMD68 552746323 16323579.31600000 NS USD 111000339.35000000 1.941578337432 Long EC RF US N 1 N N N MFS International New Discovery Fund RC53GXLQZ5LVIZBRHR66 552981383 1626976.11700000 NS USD 57969159.05000000 1.013975850071 Long EC RF US N 1 N N N MFS Value Fund HV6C0RMURVKFUQ3UTB42 55273H353 10586477.60000000 NS USD 464958096.19000000 8.132881148497 Long EC RF US N 1 N N N MFS International Value Fund 7540QFSKYNTDFH7HAK24 552746349 3756650.54000000 NS USD 173444555.43000000 3.033830288632 Long EC RF US N 1 N N N MFS Mid Cap Value Fund BXHSCSBXYY1DOHP6E209 55273W475 16043344.02900000 NS USD 403971402.65000000 7.066123661607 Long EC RF US N 1 N N N MFS International Growth Fund PTNAY8DC4VJYOKVJ5B83 552746356 4783319.80500000 NS USD 174352006.89000000 3.049703105844 Long EC RF US N 1 N N N MFS High Income Fund DMVGFZCV67YA34LSI126 552984684 82360718.88700000 NS USD 281673658.59000000 4.926935151245 Long EC RF US N 1 N N N MFS Research Bond Fund FJAEEQMSDDUK9QL2E558 55274K603 40585162.17900000 NS USD 447654338.83000000 7.830209997732 Long EC RF US N 1 N N N MFS Emerging Markets Debt Fund 509D6AOZZ4SJ08T5BZ82 552746364 11464042.57600000 NS USD 168062864.16000000 2.939695664812 Long EC RF US N 1 N N N MFS New Discovery Fund ZVEMRLDGMDO1D1VDSU87 55273H346 2640727.58600000 NS USD 88754854.17000000 1.552468246561 Long EC RF US N 1 N N N MFS New Discovery Value Fund LRMRW30Z8FYTIFW1W860 552982696 5230946.09800000 NS USD 87304490.38000000 1.527099000552 Long EC RF US N 1 N N N MFS Commodity Strategy Fund T0OEQ8I3F6DXUJCOV412 55276T826 31457534.67200000 NS USD 162950029.60000000 2.850263786651 Long EC RF US N 1 N N N MFS Inflation Adjusted Bond Fund VOHO802M9IKG3IZTEN75 55274K884 37186628.19300000 NS USD 389715863.46000000 6.816770855645 Long EC RF US N 1 N N N MFS Research International Fund UH91KW1VFNZQF5FY7237 55273H361 18036237.65500000 NS USD 348099386.74000000 6.088830291201 Long EC RF US N 1 N N N MFS Global Bond Fund XE280U8NKIY4V6K1JN70 552743882 30618660.26800000 NS USD 277405062.03000000 4.852270383005 Long EC RF US N 1 N N N MFS Government Securities Fund UWWK6TDSOPDQSQMMEB12 552982712 55711484.86600000 NS USD 556557733.81000000 9.735109332312 Long EC RF US N 1 N N N MFS Growth Fund K4ZYIH3WSXKUSPKIPM59 552985673 3716353.14000000 NS USD 468594967.42000000 8.196496002627 Long EC RF US N 1 N N N MFS Research Fund XFPOOG2XVG5TW1LZ8588 552981391 10039664.95300000 NS USD 466643627.02000000 8.162363852476 Long EC RF US N 1 N N N MFS Institutional Money Market Portfolio 5L2W638H85N8T1136O07 55291X109 3262647.38300000 NS USD 3262973.65000000 0.057074771046 Long STIV RF US N 1 N N N MFS Global Real Estate Fund ROYDM6SL56ZXYAENS860 552982720 9199438.71800000 NS USD 170005627.51000000 2.973677788265 Long EC RF US N 1 N N N 2019-12-13 MFS SERIES TRUST X Kasey Phillips Kasey Phillips Assistant Treasurer