{"entity_type":"fund","name":"MFS Research Fund","identifiers":{"lei":"XFPOOG2XVG5TW1LZ8588","cik":"200489","fund_id":"S000002438","fundkey":"mfs-research-fund"},"dates":{"reporting_period_start":"2025-12-31","reporting_period_end":"2026-09-30","filing_date":"2026-02-25"},"summary":{"total_positions":99,"total_value_usd":8011637054.7,"asset_categories":["DO","STIV","EC"],"by_asset_category":{"EC":{"positions":97,"total_value_usd":7976025873.16},"STIV":{"positions":1,"total_value_usd":35611181.54},"DO":{"positions":1,"total_value_usd":0}}},"holdings":[{"issuer_name":"NVIDIA Corp.","title":"NVIDIA Corp.","isin":"US67066G1040","value_usd":665621670.5,"pct_val":8.303992301137,"balance":3569017,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Microsoft Corp.","title":"Microsoft Corp.","isin":"US5949181045","value_usd":586497097.26,"pct_val":7.316870222431,"balance":1212723,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Apple, Inc.","title":"Apple, Inc.","isin":"US0378331005","value_usd":492577696.8,"pct_val":6.145174628804,"balance":1811880,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Amazon.com, Inc.","title":"Amazon.com, Inc.","isin":"US0231351067","value_usd":385760233.2,"pct_val":4.812568683605,"balance":1671260,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Alphabet, Inc.","title":"Alphabet, Inc., Class A","isin":"US02079K3059","value_usd":356112933,"pct_val":4.442702491561,"balance":1137741,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Meta Platforms, Inc.","title":"Meta Platforms, Inc., Class A","isin":"US30303M1027","value_usd":261116421.93,"pct_val":3.257569357347,"balance":395577,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Broadcom, Inc.","title":"Broadcom, Inc.","isin":"US11135F1012","value_usd":258197175.9,"pct_val":3.221150175652,"balance":746019,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Mastercard, Inc.","title":"Mastercard, Inc., Class A","isin":"US57636Q1040","value_usd":222784778.24,"pct_val":2.779361257763,"balance":390248,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"JPMorgan Chase & Co.","title":"JPMorgan Chase & Co.","isin":"US46625H1005","value_usd":210755402.06,"pct_val":2.629288248405,"balance":654073,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Johnson & Johnson","title":"Johnson & Johnson","isin":"US4781601046","value_usd":122162585,"pct_val":1.524044679262,"balance":590300,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"RTX Corp.","title":"RTX Corp.","isin":"US75513E1010","value_usd":117250371,"pct_val":1.462762138375,"balance":639315,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Exxon Mobil Corp.","title":"Exxon Mobil Corp.","isin":"US30231G1022","value_usd":112898054.06,"pct_val":1.408464617781,"balance":938159,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Lam Research Corp.","title":"Lam Research Corp.","isin":"US5128073062","value_usd":110368647.36,"pct_val":1.37690889372,"balance":644752,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Accenture plc","title":"Accenture plc, Class A","isin":"IE00B4BNMY34","value_usd":86011345.7,"pct_val":1.073038310136,"balance":320579,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"IE","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Salesforce, Inc.","title":"Salesforce, Inc.","isin":"US79466L3024","value_usd":85188168.34,"pct_val":1.06276872493,"balance":321574,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Thermo Fisher Scientific, Inc.","title":"Thermo Fisher Scientific, Inc.","isin":"US8835561023","value_usd":82532222.4,"pct_val":1.029634355039,"balance":142432,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Spotify Technology SA","title":"Spotify Technology SA","isin":"LU1778762911","value_usd":82067679.33,"pct_val":1.023838927624,"balance":141323,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"LU","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"PNC Financial Services Group, Inc. (The)","title":"PNC Financial Services Group, Inc. (The)","isin":"US6934751057","value_usd":81004773.32,"pct_val":1.010578597147,"balance":388084,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Charles Schwab Corp. (The)","title":"Charles Schwab Corp. (The)","isin":"US8085131055","value_usd":77679425.54,"pct_val":0.969093075284,"balance":777494,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Morgan Stanley","title":"Morgan Stanley","isin":"US6174464486","value_usd":76897474.56,"pct_val":0.959337811588,"balance":433152,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Medtronic plc","title":"Medtronic plc","isin":"IE00BTN1Y115","value_usd":76381628.7,"pct_val":0.95290235397,"balance":795145,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"IE","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Chubb Ltd.","title":"Chubb Ltd.","isin":"CH0044328745","value_usd":73769874.12,"pct_val":0.920319295326,"balance":236351,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"CH","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"CME Group, Inc.","title":"CME Group, Inc.","isin":"US12572Q1058","value_usd":73387792.28,"pct_val":0.915552616597,"balance":268741,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Caterpillar, Inc.","title":"Caterpillar, Inc.","isin":"US1491231015","value_usd":71431160.3,"pct_val":0.891142568641,"balance":124690,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Emerson Electric Co.","title":"Emerson Electric Co.","isin":"US2910111044","value_usd":70334964,"pct_val":0.877466923692,"balance":529950,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Cadence Design Systems, Inc.","title":"Cadence Design Systems, Inc.","isin":"US1273871087","value_usd":69915706.34,"pct_val":0.872236456393,"balance":223673,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Aramark","title":"Aramark","isin":"US03852U1060","value_usd":68020633.08,"pct_val":0.848594386944,"balance":1845378,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Becton Dickinson & Co.","title":"Becton Dickinson & Co.","isin":"US0758871091","value_usd":65380242.3,"pct_val":0.815654076132,"balance":336890,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Omnicom Group, Inc.","title":"Omnicom Group, Inc.","isin":"US6819191064","value_usd":65318271.25,"pct_val":0.814880953584,"balance":808895,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"CRH plc","title":"CRH plc","isin":"IE0001827041","value_usd":64493395.2,"pct_val":0.804590176297,"balance":516774,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"IE","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Cigna Group (The)","title":"Cigna Group (The)","isin":"US1255231003","value_usd":64410975.98,"pct_val":0.803561951708,"balance":234026,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Philip Morris International, Inc.","title":"Philip Morris International, Inc.","isin":"US7181721090","value_usd":64173313.2,"pct_val":0.800596979288,"balance":400083,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Howmet Aerospace, Inc.","title":"Howmet Aerospace, Inc.","isin":"US4432011082","value_usd":63642923.46,"pct_val":0.793980078858,"balance":310423,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"ConocoPhillips","title":"ConocoPhillips","isin":"US20825C1045","value_usd":62749778.52,"pct_val":0.782837610044,"balance":670332,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Aon plc","title":"Aon plc, Class A","isin":"IE00BLP1HW54","value_usd":61481223.76,"pct_val":0.76701169958,"balance":174227,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"IE","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Progressive Corp. (The)","title":"Progressive Corp. (The)","isin":"US7433151039","value_usd":60960644,"pct_val":0.760517183985,"balance":267700,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"American Tower Corp.","title":"American Tower Corp.","isin":"US03027X1000","value_usd":58524854.94,"pct_val":0.730129390892,"balance":333342,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Autodesk, Inc.","title":"Autodesk, Inc.","isin":"US0527691069","value_usd":58192901.91,"pct_val":0.725988096328,"balance":196591,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"PepsiCo, Inc.","title":"PepsiCo, Inc.","isin":"US7134481081","value_usd":58000307.04,"pct_val":0.723585370593,"balance":404127,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"TransUnion","title":"TransUnion","isin":"US89400J1079","value_usd":57161121.5,"pct_val":0.713116074637,"balance":666602,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Nordson Corp.","title":"Nordson Corp.","isin":"US6556631025","value_usd":56675842.61,"pct_val":0.707061956592,"balance":235727,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Willis Towers Watson plc","title":"Willis Towers Watson plc","isin":"IE00BDB6Q211","value_usd":56500798.4,"pct_val":0.704878184884,"balance":171944,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"IE","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Hilton Worldwide Holdings, Inc.","title":"Hilton Worldwide Holdings, Inc.","isin":"US43300A2033","value_usd":56146746.75,"pct_val":0.700461198019,"balance":195463,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Pfizer, Inc.","title":"Pfizer, Inc.","isin":"US7170811035","value_usd":56127961.5,"pct_val":0.70022684181,"balance":2254135,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"TJX Cos., Inc. (The)","title":"TJX Cos., Inc. (The)","isin":"US8725401090","value_usd":55736159.62,"pct_val":0.695338900297,"balance":362842,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"General Dynamics Corp.","title":"General Dynamics Corp.","isin":"US3695501086","value_usd":55226379.72,"pct_val":0.688979118828,"balance":164042,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Amphenol Corp.","title":"Amphenol Corp., Class A","isin":"US0320951017","value_usd":54510610.96,"pct_val":0.680049514316,"balance":403364,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"AbbVie, Inc.","title":"AbbVie, Inc.","isin":"US00287Y1091","value_usd":53856235.45,"pct_val":0.671885823983,"balance":235705,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Waters Corp.","title":"Waters Corp.","isin":"US9418481035","value_usd":52580246.73,"pct_val":0.655967170825,"balance":138431,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Constellation Software, Inc.","title":"Constellation Software, Inc.","isin":"CA21037X1006","value_usd":50992444.72,"pct_val":0.636158477311,"balance":21200,"units":"NS","currency":null,"asset_cat":"EC","issuer_cat":"CORP","inv_country":"CA","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"McKesson Corp.","title":"McKesson Corp.","isin":"US58155Q1031","value_usd":50497872.69,"pct_val":0.629988422291,"balance":61561,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Boston Scientific Corp.","title":"Boston Scientific Corp.","isin":"US1011371077","value_usd":49676205.8,"pct_val":0.61973768102,"balance":520988,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Moody's Corp.","title":"Moody's Corp.","isin":"US6153691059","value_usd":48747861.25,"pct_val":0.60815607793,"balance":95425,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Gilead Sciences, Inc.","title":"Gilead Sciences, Inc.","isin":"US3755581036","value_usd":48624555.66,"pct_val":0.606617773642,"balance":396159,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Okta, Inc.","title":"Okta, Inc.","isin":"US6792951054","value_usd":47998286.42,"pct_val":0.598804724311,"balance":555086,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"BJ's Wholesale Club Holdings, Inc.","title":"BJ's Wholesale Club Holdings, Inc.","isin":"US05550J1016","value_usd":46476727.08,"pct_val":0.579822444128,"balance":516236,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Eaton Corp. plc","title":"Eaton Corp. plc","isin":"IE00B8KQN827","value_usd":45716058.81,"pct_val":0.570332693813,"balance":143531,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"IE","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Arista Networks, Inc.","title":"Arista Networks, Inc.","isin":"US0404132054","value_usd":44821956.22,"pct_val":0.559178277794,"balance":342074,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Uber Technologies, Inc.","title":"Uber Technologies, Inc.","isin":"US90353T1007","value_usd":44406443.44,"pct_val":0.55399452991,"balance":543464,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"WW Grainger, Inc.","title":"WW Grainger, Inc.","isin":"US3848021040","value_usd":44394163.8,"pct_val":0.553841334723,"balance":43996,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Duke Energy Corp.","title":"Duke Energy Corp.","isin":"US26441C2044","value_usd":44211846.42,"pct_val":0.551566826264,"balance":377202,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Aptiv plc","title":"Aptiv plc","isin":"JE00BTDN8H13","value_usd":44204713.77,"pct_val":0.551477842577,"balance":580953,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"JE","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Union Pacific Corp.","title":"Union Pacific Corp.","isin":"US9078181081","value_usd":43931137.8,"pct_val":0.548064833582,"balance":189915,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Tyler Technologies, Inc.","title":"Tyler Technologies, Inc.","isin":"US9022521051","value_usd":43308645.8,"pct_val":0.540298907374,"balance":95404,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"STERIS plc","title":"STERIS plc","isin":"IE00BFY8C754","value_usd":42261276.96,"pct_val":0.527232411541,"balance":166698,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"IE","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Cognizant Technology Solutions Corp.","title":"Cognizant Technology Solutions Corp., Class A","isin":"US1924461023","value_usd":41679197,"pct_val":0.519970647508,"balance":502159,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Starbucks Corp.","title":"Starbucks Corp.","isin":"US8552441094","value_usd":41168500.59,"pct_val":0.513599432079,"balance":488879,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Trane Technologies plc","title":"Trane Technologies plc","isin":"IE00BK9ZQ967","value_usd":40688135.6,"pct_val":0.507606617609,"balance":104543,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"IE","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"KKR & Co., Inc.","title":"KKR & Co., Inc.","isin":"US48251W1045","value_usd":38522161.36,"pct_val":0.480584911119,"balance":302182,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"PG&E Corp.","title":"PG&E Corp.","isin":"US69331C1080","value_usd":38081303.98,"pct_val":0.475084975568,"balance":2369714,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"US Foods Holding Corp.","title":"US Foods Holding Corp.","isin":"US9120081099","value_usd":37554175.4,"pct_val":0.468508759882,"balance":498595,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Alliant Energy Corp.","title":"Alliant Energy Corp.","isin":"US0188021085","value_usd":37357736.46,"pct_val":0.466058077283,"balance":574646,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Colgate-Palmolive Co.","title":"Colgate-Palmolive Co.","isin":"US1941621039","value_usd":37204038.36,"pct_val":0.464140609906,"balance":470818,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Pentair plc","title":"Pentair plc","isin":"IE00BLS09M33","value_usd":37164754.22,"pct_val":0.463650518897,"balance":356873,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"IE","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"MFS Institutional Money Market Portfolio","title":"MFS Institutional Money Market Portfolio, Class A","isin":"US55291X1090","value_usd":35611181.54,"pct_val":0.444268854889,"balance":35604060.7323,"units":"NS","currency":"USD","asset_cat":"STIV","issuer_cat":"RF","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"PulteGroup, Inc.","title":"PulteGroup, Inc.","isin":"US7458671010","value_usd":34278850.32,"pct_val":0.427647298404,"balance":292332,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"GFL Environmental, Inc.","title":"GFL Environmental, Inc.","isin":"CA36168Q1046","value_usd":34230162.15,"pct_val":0.427039887007,"balance":796977,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"CA","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"PPL Corp.","title":"PPL Corp.","isin":"US69351T1060","value_usd":33323000.84,"pct_val":0.415722556355,"balance":951542,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Sherwin-Williams Co. (The)","title":"Sherwin-Williams Co. (The)","isin":"US8243481061","value_usd":32771422.11,"pct_val":0.408841311753,"balance":101137,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Allegion plc","title":"Allegion plc","isin":"IE00BFRT3W74","value_usd":32235521.98,"pct_val":0.402155666211,"balance":202459,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"IE","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Shopify, Inc.","title":"Shopify, Inc., Class A","isin":"CA82509L1076","value_usd":31893629.98,"pct_val":0.397890377592,"balance":198134,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"CA","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Kenvue, Inc.","title":"Kenvue, Inc.","isin":"US49177J1025","value_usd":31134680.25,"pct_val":0.388422066998,"balance":1804909,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Tractor Supply Co.","title":"Tractor Supply Co.","isin":"US8923561067","value_usd":29851319.07,"pct_val":0.372411438392,"balance":596907,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Floor & Decor Holdings, Inc.","title":"Floor & Decor Holdings, Inc., Class A","isin":"US3397501012","value_usd":29702081.11,"pct_val":0.370549613686,"balance":487799,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Curtiss-Wright Corp.","title":"Curtiss-Wright Corp.","isin":"US2315611010","value_usd":28206280.82,"pct_val":0.35188869166,"balance":51166,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Mondelez International, Inc.","title":"Mondelez International, Inc., Class A","isin":"US6092071058","value_usd":28106634.71,"pct_val":0.350645552251,"balance":522137,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Ferguson Enterprises, Inc.","title":"Ferguson Enterprises, Inc.","isin":"US31488V1070","value_usd":28022883.36,"pct_val":0.349600708616,"balance":125872,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Coherent Corp.","title":"Coherent Corp.","isin":"US19247G1076","value_usd":27943159.72,"pct_val":0.348606112853,"balance":151396,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"TKO Group Holdings, Inc.","title":"TKO Group Holdings, Inc.","isin":"US87256C1018","value_usd":26772273,"pct_val":0.333998664299,"balance":128097,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Humana, Inc.","title":"Humana, Inc.","isin":"US4448591028","value_usd":24753683.85,"pct_val":0.308815666955,"balance":96645,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Viking Holdings Ltd.","title":"Viking Holdings Ltd.","isin":"BMG93A5A1010","value_usd":24715001,"pct_val":0.308333077365,"balance":346100,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"BM","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Vistra Corp.","title":"Vistra Corp.","isin":"US92840M1027","value_usd":23694537.1,"pct_val":0.29560223529,"balance":146870,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Estee Lauder Cos., Inc. (The)","title":"Estee Lauder Cos., Inc. (The)","isin":"US5184391044","value_usd":23005203.76,"pct_val":0.287002427017,"balance":219683,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Valero Energy Corp.","title":"Valero Energy Corp.","isin":"US91913Y1001","value_usd":20446749.58,"pct_val":0.255084319848,"balance":125602,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"TechnipFMC plc","title":"TechnipFMC plc","isin":"GB00BDSFG982","value_usd":17655741.44,"pct_val":0.220264975565,"balance":396224,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"GB","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Cheniere Energy, Inc.","title":"Cheniere Energy, Inc.","isin":"US16411R2085","value_usd":16890935.88,"pct_val":0.210723610307,"balance":86892,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"Atlassian Corp.","title":"Atlassian Corp., Class A","isin":"US0494681010","value_usd":14239134.8,"pct_val":0.177640949798,"balance":87820,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"EQT Corp.","title":"EQT Corp.","isin":"US26884L1098","value_usd":13885937.6,"pct_val":0.173234622661,"balance":259066,"units":"NS","currency":"USD","asset_cat":"EC","issuer_cat":"CORP","inv_country":"US","fair_val_level":"1","payoff_profile":"Long"},{"issuer_name":"N/A","title":"Constellation Software, Inc.","isin":"CA21037X1345","value_usd":0,"pct_val":0,"balance":30929,"units":"NS","currency":null,"asset_cat":"DO","issuer_cat":null,"inv_country":"CA","fair_val_level":"2","payoff_profile":"N/A"}],"source_documents":[{"label":"SEC NPORT-P Filings","url":"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=200489&type=NPORT&dateb=&owner=exclude&count=40"}],"dataset":{"json":"https://dealcharts.org/llm/facts/fund/mfs-research-fund.json","page":"https://dealcharts.org/capitalmarkets/funds/mfs-research-fund/"},"provenance":{"curator":"CMD+RVL","curator_url":"https://cmdrvl.com","platform":"Dealcharts","platform_url":"https://dealcharts.org/","source":"SEC NPORT-P Public Filings","license":"CC-BY 4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Data curated by CMD+RVL from SEC NPORT-P public filings"},"citation":"Fund: MFS Research Fund | LEI: XFPOOG2XVG5TW1LZ8588 | 99 positions totaling $8,011,637,055 across DO, STIV, EC | Filing: Tue Feb 24 2026 19:00:00 GMT-0500 (Eastern Standard Time) | Source: SEC NPORT-P via Dealcharts.org","updated_at":"2026-02-25"}
