NPORT-P false 0000783740 XXXXXXXX S000050658 C000160021 C000160025 C000160024 C000160026 C000160023 C000160022 C000160020 C000160028 C000160027 MFS SERIES TRUST X 811-04492 0000783740 5493001MUVNRNUPJY164 111 HUNTINGTON AVENUE BOSTON 02199 617-954-5000 MFS Blended Research Growth Equity Fund S000050658 549300M0GLI3GVVPMM34 2025-05-31 2024-11-30 N 390710567.94 116442.82 390594125.12 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 Equitable Holdings Inc 549300FIBAKMNHPZ4009 29452E101 96535.00000000 NS USD 4655883.05000000 1.192000276135 Long EC CORP US N 1 N N N Salesforce Inc RCGZFPDMRW58VJ54VR07 79466L302 9700.00000000 NS USD 3200903.00000000 0.819495940707 Long EC CORP US N 1 N N N Vistra Corp 549300KP43CPCUJOOG15 92840M102 2584.00000000 NS USD 413026.56000000 0.105743157266 Long EC CORP US N 1 N N N Atlassian Corp 549300V7ZY5P02D2MY38 049468101 1944.00000000 NS USD 512399.52000000 0.131184645914 Long EC CORP US N 1 N N N Vertex Pharmaceuticals Inc 54930015RAQRRZ5ZGJ91 92532F100 2273.00000000 NS USD 1064059.49000000 0.272420761493 Long EC CORP US N 1 N N N Jones Lang LaSalle Inc 6SYKCME112RT8TQUO411 48020Q107 7001.00000000 NS USD 1964480.60000000 0.502946786359 Long EC CORP US N 1 N N N Amphenol Corp 549300D3L3G0R4U4VT04 032095101 28460.00000000 NS USD 2067619.00000000 0.529352303843 Long EC CORP US N 1 N N N Northern Trust Corp 549300GLF98S992BC502 665859104 30253.00000000 NS USD 3362923.48000000 0.860976462195 Long EC CORP US N 1 N N N AbbVie Inc FR5LCKFTG8054YNNRU85 00287Y109 17438.00000000 NS USD 3189933.34000000 0.816687485767 Long EC CORP US N 1 N N N Costco Wholesale Corp 29DX7H14B9S6O3FD6V18 22160K105 360.00000000 NS USD 349876.80000000 0.089575540823 Long EC CORP US N 1 N N N Masco Corp 5GCSNMQXHEYA1JO8QN11 574599106 39193.00000000 NS USD 3157388.08000000 0.808355240629 Long EC CORP US N 1 N N N Burlington Stores Inc 5299003Z37DVGKKC1W09 122017106 2254.00000000 NS USD 635357.52000000 0.162664382062 Long EC CORP US N 1 N N N Spotify Technology SA 549300B4X0JHWV0DTD60 000000000 13703.00000000 NS USD 6535782.88000000 1.673292673818 Long EC CORP LU N 1 N N N Dropbox Inc 549300JCDF7UAR6TJR51 26210C104 114823.00000000 NS USD 3176004.18000000 0.813121338940 Long EC CORP US N 1 N N N PepsiCo Inc FJSUNZKFNQ5YPJ5OT455 713448108 1861.00000000 NS USD 304180.45000000 0.077876350522 Long EC CORP US N 1 N N N Alphabet Inc 5493006MHB84DD0ZWV18 02079K305 99176.00000000 NS USD 16755785.20000000 4.289820077261 Long EC CORP US N 1 N N N Visa Inc 549300JZ4OKEHW3DPJ59 92826C839 8686.00000000 NS USD 2736784.88000000 0.700672310204 Long EC CORP US N 1 N N N NRG Energy Inc 5E2UPK5SW04M13XY7I38 629377508 41378.00000000 NS USD 4204418.58000000 1.076416236088 Long EC CORP US N 1 N N N Lam Research Corp 549300I4GMO6D34U1T02 512807306 56985.00000000 NS USD 4210051.80000000 1.077858454401 Long EC CORP US N 1 N N N NXP Semiconductors NV 724500M9BY5293JDF951 000000000 12117.00000000 NS USD 2779276.29000000 0.711550971010 Long EC CORP NL N 1 N N N Leidos Holdings Inc 549300IUTGTP6EJP8124 525327102 8255.00000000 NS USD 1365377.00000000 0.349564141442 Long EC CORP US N 1 N N N Hasbro Inc 549300NUB6D2R1ITYR45 418056107 37087.00000000 NS USD 2416218.05000000 0.618600714810 Long EC CORP US N 1 N N N Tyler Technologies Inc 25490040SMU4Z8LBCW70 902252105 2865.00000000 NS USD 1802572.05000000 0.461494921216 Long EC CORP US N 1 N N N Microsoft Corp INR2EJN1ERAN0W5ZP974 594918104 89218.00000000 NS USD 37780254.28000000 9.672509607868 Long EC CORP US N 1 N N N IQVIA Holdings Inc 549300W3R20NM4KQPH86 46266C105 15030.00000000 NS USD 3018625.20000000 0.772829135377 Long EC CORP US N 1 N N N Veeva Systems Inc 549300YZEXPDB92M2F02 922475108 20032.00000000 NS USD 4564291.20000000 1.168550909104 Long EC CORP US N 1 N N N Applied Materials Inc 41BNNE1AFPNAZELZ6K07 038222105 27898.00000000 NS USD 4874059.58000000 1.247857882783 Long EC CORP US N 1 N N N NVIDIA Corp 549300S4KLFTLO7GSQ80 67066G104 338859.00000000 NS USD 46847256.75000000 11.99384571788 Long EC CORP US N 1 N N N Wingstop Inc 549300SSH3F8HPIM3Q47 974155103 9420.00000000 NS USD 3097013.40000000 0.792898100822 Long EC CORP US N 1 N N N Alphabet Inc 5493006MHB84DD0ZWV18 02079K107 63568.00000000 NS USD 10837708.32000000 2.774672639193 Long EC CORP US N 1 N N N Cigna Group/The 549300VIWYMSIGT1U456 125523100 11604.00000000 NS USD 3919831.20000000 1.003556107966 Long EC CORP US N 1 N N N Lamar Advertising Co 529900Y8WW4MKVPTB543 512816109 26875.00000000 NS USD 3601787.50000000 0.922130484910 Long EC CORP US N 1 N N N Illumina Inc SQ95QG8SR5Q56LSNF682 452327109 4049.00000000 NS USD 583663.35000000 0.149429628471 Long EC CORP US N 1 N N N Target Corp 8WDDFXB5T1Z6J0XC1L66 87612E106 26792.00000000 NS USD 3544849.52000000 0.907553209846 Long EC CORP US N 1 N N N Gartner Inc PP55B5R38BFB8O8HH686 366651107 4520.00000000 NS USD 2341043.60000000 0.599354534398 Long EC CORP US N 1 N N N Guidewire Software Inc 549300WXSG0J8IXZCK32 40171V100 20033.00000000 NS USD 4064495.37000000 1.040593062876 Long EC CORP US N 1 N N N Nutanix Inc 549300X7J6E8TKVIXW09 67059N108 15368.00000000 NS USD 1003223.04000000 0.256845399221 Long EC CORP US N 1 N N N Flowserve Corp 6Y0GK87T6V7NJKZJVM41 34354P105 15681.00000000 NS USD 956854.62000000 0.244974145401 Long EC CORP US N 1 N N N TJX Cos Inc/The V167QI9I69W364E2DY52 872540109 6429.00000000 NS USD 808061.01000000 0.206879970289 Long EC CORP US N 1 N N N Incyte Corp 549300Z4WN6JVZ3T4680 45337C102 12398.00000000 NS USD 924766.82000000 0.236759019280 Long EC CORP US N 1 N N N Texas Roadhouse Inc 5299002Y1CNRPDGXTQ75 882681109 3198.00000000 NS USD 656453.46000000 0.168065369595 Long EC CORP US N 1 N N N Mastercard Inc AR5L2ODV9HN37376R084 57636Q104 3396.00000000 NS USD 1809864.24000000 0.463361869419 Long EC CORP US N 1 N N N Popular Inc 5493008CARDZMVQ3LO89 733174700 11016.00000000 NS USD 1094549.76000000 0.280226887607 Long EC CORP PR N 1 N N N Broadcom Inc 549300WV6GIDOZJTV909 11135F101 38280.00000000 NS USD 6204422.40000000 1.588457685607 Long EC CORP US N 1 N N N Tesla Inc 54930043XZGB27CTOV49 88160R101 18937.00000000 NS USD 6536294.92000000 1.673423766420 Long EC CORP US N 1 N N N Home Depot Inc/The QEKMOTMBBKA8I816DO57 437076102 1249.00000000 NS USD 535983.37000000 0.137222588751 Long EC CORP US N 1 N N N Corebridge Financial Inc 549300XY1661QCIA7J65 21871X109 38273.00000000 NS USD 1238897.01000000 0.317182704583 Long EC CORP US N 1 N N N Grand Canyon Education Inc 529900XFER799IYOSW74 38526M106 1786.00000000 NS USD 293957.74000000 0.075259129898 Long EC CORP US N 1 N N N MFS Institutional Money Market Portfolio 5L2W638H85N8T1136O07 55291X109 3054013.83000000 NS USD 3054319.23000000 0.781967529353 Long STIV RF US N 1 N N N ServiceNow Inc 549300HJTQM36M0E1G39 81762P102 7453.00000000 NS USD 7821476.32000000 2.002456211443 Long EC CORP US N 1 N N N Meta Platforms Inc BQ4BKCS1HXDV9HN80Z93 30303M102 30545.00000000 NS USD 17542604.40000000 4.491261714346 Long EC CORP US N 1 N N N Pfizer Inc 765LHXWGK1KXCLTFYQ30 717081103 125284.00000000 NS USD 3283693.64000000 0.840692019878 Long EC CORP US N 1 N N N Ross Stores Inc 549300ENZFLPGRDFZQ60 778296103 14071.00000000 NS USD 2179175.77000000 0.557913094399 Long EC CORP US N 1 N N N Autodesk Inc FRKKVKAIQEF3FCSTPG55 052769106 14762.00000000 NS USD 4309027.80000000 1.103198313255 Long EC CORP US N 1 N N N Datadog Inc 549300F6JNO0KRPO1K63 23804L103 31985.00000000 NS USD 4885708.75000000 1.250840306033 Long EC CORP US N 1 N N N QUALCOMM Inc H1J8DDZKZP6H7RWC0H53 747525103 15349.00000000 NS USD 2433276.97000000 0.622968143530 Long EC CORP US N 1 N N N Exelixis Inc 254900PJQB59O2O95R37 30161Q104 8284.00000000 NS USD 302034.64000000 0.077326979740 Long EC CORP US N 1 N N N Ameriprise Financial Inc 6ZLKQF7QB6JAEKQS5388 03076C106 9316.00000000 NS USD 5347104.52000000 1.368966959847 Long EC CORP US N 1 N N N McKesson Corp 549300WZWOM80UCFSF54 58155Q103 6454.00000000 NS USD 4056339.00000000 1.038504867105 Long EC CORP US N 1 N N N Verisk Analytics Inc 549300I1YSWNIRKBWP67 92345Y106 15511.00000000 NS USD 4563491.31000000 1.168346121078 Long EC CORP US N 1 N N N PVH Corp 123WALMHY1GZXG2YDL90 693656100 30053.00000000 NS USD 3256843.61000000 0.833817868868 Long EC CORP US N 1 N N N RPM International Inc 549300TJCKW4BRXPJ474 749685103 10350.00000000 NS USD 1436373.00000000 0.367740554100 Long EC CORP US N 1 N N N Apple Inc HWUPKR0MPOU8FGXBT394 037833100 178857.00000000 NS USD 42448131.81000000 10.86758071360 Long EC CORP US N 1 N N N Builders FirstSource Inc 549300W0SKP6L3H7DP63 12008R107 14379.00000000 NS USD 2681252.13000000 0.686454802456 Long EC CORP US N 1 N N N TriNet Group Inc 5299003FJVBETSFKE990 896288107 10052.00000000 NS USD 939158.36000000 0.240443544743 Long EC CORP US N 1 N N N AppLovin Corp 549300LLVXMUAOL3SQ07 03831W108 22638.00000000 NS USD 7623346.50000000 1.951730968216 Long EC CORP US N 1 N N N Kimberly-Clark Corp MP3J6QPYPGN75NVW2S34 494368103 28850.00000000 NS USD 4020247.50000000 1.029264712766 Long EC CORP US N 1 N N N Booking Holdings Inc FXM8FAOHMYDIPD38UZ17 09857L108 1295.00000000 NS USD 6736564.10000000 1.724696729099 Long EC CORP US N 1 N N N Merck & Co Inc 4YV9Y5M8S0BRK1RP0397 58933Y105 6885.00000000 NS USD 699791.40000000 0.179160759211 Long EC CORP US N 1 N N N Colgate-Palmolive Co YMEGZFW4SBUSS5BQXF88 194162103 12324.00000000 NS USD 1190868.12000000 0.304886336842 Long EC CORP US N 1 N N N Eli Lilly & Co FRDRIPF3EKNDJ2CQJL29 532457108 6226.00000000 NS USD 4951849.10000000 1.267773574033 Long EC CORP US N 1 N N N Amazon.com Inc ZXTILKJKG63JELOEG630 023135106 129821.00000000 NS USD 26988487.69000000 6.909598981220 Long EC CORP US N 1 N N N American Express Co R4PP93JZOLY261QX3811 025816109 16802.00000000 NS USD 5119233.36000000 1.310627331741 Long EC CORP US N 1 N N N 2024-12-13 MFS SERIES TRUST X James Byrne James Byrne Assistant Treasurer