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MFS Investment Management and Fidelity (FMR LLC): where the books meet

At Q2 2026, at least 44% of the two 13F books was the same, across 239 stocks both listed, against 35% at Q2 2013. Overlap is the smaller of each shared stock’s two weights, added up: the part of one book that could be swapped for the other’s without a trade.

Overlap by quarter
0%22%44%Q2 2013: 35%, 263 in bothQ3 2013: 34%, 259 in bothQ4 2013: 34%, 250 in bothQ1 2014: 34%, 253 in both14Q2 2014: 34%, 251 in bothQ3 2014: 33%, 249 in bothQ4 2014: 33%, 242 in bothQ1 2015: 33%, 248 in both15Q2 2015: 34%, 239 in bothQ3 2015: 35%, 239 in bothQ4 2015: 35%, 245 in bothQ1 2016: 35%, 249 in both16Q2 2016: 35%, 247 in bothQ3 2016: 35%, 248 in bothQ4 2016: 35%, 241 in bothQ1 2017: 34%, 238 in both17Q2 2017: 34%, 242 in bothQ3 2017: 35%, 246 in bothQ4 2017: 34%, 244 in bothQ1 2018: 35%, 245 in both18Q2 2018: 35%, 238 in bothQ3 2018: 34%, 238 in bothQ4 2018: 34%, 245 in bothQ1 2019: 33%, 243 in both19Q2 2019: 34%, 247 in bothQ3 2019: 35%, 247 in bothQ4 2019: 35%, 239 in bothQ1 2020: 35%, 242 in both20Q2 2020: 36%, 239 in bothQ3 2020: 36%, 232 in bothQ4 2020: 36%, 231 in bothQ1 2021: 36%, 234 in both21Q2 2021: 36%, 238 in bothQ3 2021: 37%, 235 in bothQ4 2021: 36%, 238 in bothQ1 2022: 36%, 235 in both22Q2 2022: 35%, 235 in bothQ3 2022: 36%, 242 in bothQ4 2022: 36%, 235 in bothQ1 2023: 37%, 239 in both23Q2 2023: 38%, 243 in bothQ3 2023: 39%, 246 in bothQ4 2023: 39%, 244 in bothQ1 2024: 40%, 243 in both24Q2 2024: 42%, 239 in bothQ3 2024: 40%, 238 in bothQ4 2024: 42%, 241 in bothQ1 2025: 40%, 246 in both25Q2 2025: 41%, 240 in bothQ3 2025: 42%, 239 in bothQ4 2025: 41%, 239 in bothQ1 2026: 42%, 240 in both26Q2 2026: 44%, 239 in both
  • Q2 2013: 35%, 263 in both
  • Q3 2013: 34%, 259 in both
  • Q4 2013: 34%, 250 in both
  • Q1 2014: 34%, 253 in both
  • Q2 2014: 34%, 251 in both
  • Q3 2014: 33%, 249 in both
  • Q4 2014: 33%, 242 in both
  • Q1 2015: 33%, 248 in both
  • Q2 2015: 34%, 239 in both
  • Q3 2015: 35%, 239 in both
  • Q4 2015: 35%, 245 in both
  • Q1 2016: 35%, 249 in both
  • Q2 2016: 35%, 247 in both
  • Q3 2016: 35%, 248 in both
  • Q4 2016: 35%, 241 in both
  • Q1 2017: 34%, 238 in both
  • Q2 2017: 34%, 242 in both
  • Q3 2017: 35%, 246 in both
  • Q4 2017: 34%, 244 in both
  • Q1 2018: 35%, 245 in both
  • Q2 2018: 35%, 238 in both
  • Q3 2018: 34%, 238 in both
  • Q4 2018: 34%, 245 in both
  • Q1 2019: 33%, 243 in both
  • Q2 2019: 34%, 247 in both
  • Q3 2019: 35%, 247 in both
  • Q4 2019: 35%, 239 in both
  • Q1 2020: 35%, 242 in both
  • Q2 2020: 36%, 239 in both
  • Q3 2020: 36%, 232 in both
  • Q4 2020: 36%, 231 in both
  • Q1 2021: 36%, 234 in both
  • Q2 2021: 36%, 238 in both
  • Q3 2021: 37%, 235 in both
  • Q4 2021: 36%, 238 in both
  • Q1 2022: 36%, 235 in both
  • Q2 2022: 35%, 235 in both
  • Q3 2022: 36%, 242 in both
  • Q4 2022: 36%, 235 in both
  • Q1 2023: 37%, 239 in both
  • Q2 2023: 38%, 243 in both
  • Q3 2023: 39%, 246 in both
  • Q4 2023: 39%, 244 in both
  • Q1 2024: 40%, 243 in both
  • Q2 2024: 42%, 239 in both
  • Q3 2024: 40%, 238 in both
  • Q4 2024: 42%, 241 in both
  • Q1 2025: 40%, 246 in both
  • Q2 2025: 41%, 240 in both
  • Q3 2025: 42%, 239 in both
  • Q4 2025: 41%, 239 in both
  • Q1 2026: 42%, 240 in both
  • Q2 2026: 44%, 239 in both

Only quarters both managers filed. Where either filing has more positions than are read each quarter, a stock both hold below that range is not counted, so the figure is a floor.

What the overlap is made of, Q2 2026

Stocks both listed, by the smaller of the two weights. A weight is the stock’s share of that manager’s reported book, which says how large the position is, not how strongly it is held.

StockMFS Investment ManagementFidelity (FMR LLC)
Nvidia Corp(NVDA)4.3%Trimmed8.9%Added
Alphabet Inc(GOOGL)3.3%Added3.9%Added
Apple Inc(AAPL)2.8%Added4.1%Added
Amazon Com Inc(AMZN)2.8%Added3.8%Added
Microsoft Corp(MSFT)2.8%Trimmed3.0%Trimmed
Broadcom Inc(AVGO)1.7%Added2.4%Added
Taiwan Semiconductor MFG LTD(TSM)1.5%Trimmed1.2%Trimmed
Exxon Mobil Corp(XOM)0.7%Trimmed0.8%Trimmed
Facebook Inc(META)0.7%Trimmed2.3%Trimmed
Visa Inc(V)0.8%Trimmed0.6%Trimmed
Ge Vernova Inc(GEV)0.6%Trimmed0.8%Trimmed
Kla-tencor Corp(KLAC)1.4%Added0.6%Added
Amphenol Corp New(APH)0.6%Trimmed0.5%Trimmed
Mastercard Inc(MA)0.9%Trimmed0.5%Trimmed
Micron Technology Inc(MU)0.5%Added1.3%Trimmed
Boeing Co(BA)0.5%Trimmed0.6%Added
Advanced Micro Devices Inc(AMD)0.4%Added0.6%Added
Space Exploration Techn Corp(SPCX)0.4%New2.2%New
JPMorgan Chase & Co(JPM)1.3%Trimmed0.4%Trimmed
Philip Morris Intl Inc(PM)0.5%Trimmed0.4%Added

and 219 smaller ones

Moved different ways in Q2 2026

Stocks one manager started or added to while the other trimmed or sold out, between the same two quarter ends. A 13F shows the quarter ends, never when in between anything was bought or sold, or why.

  • Nvidia Corp(NVDA)MFS Investment Management trimmed; Fidelity (FMR LLC) added
  • Micron Technology Inc(MU)MFS Investment Management added; Fidelity (FMR LLC) trimmed
  • SanDisk Corp(SNDK)MFS Investment Management added; Fidelity (FMR LLC) trimmed
  • Lam Research Corp(LRCX)MFS Investment Management trimmed; Fidelity (FMR LLC) added
  • Intel Corp(INTC)MFS Investment Management trimmed; Fidelity (FMR LLC) added
  • Boeing Co(BA)MFS Investment Management trimmed; Fidelity (FMR LLC) added
  • Astera Labs Inc(ALAB)MFS Investment Management started; Fidelity (FMR LLC) trimmed
  • Bank of America Corporation(BAC)MFS Investment Management added; Fidelity (FMR LLC) trimmed
  • Netflix Inc(NFLX)MFS Investment Management added; Fidelity (FMR LLC) trimmed
  • Ciena Corp(CIEN)MFS Investment Management added; Fidelity (FMR LLC) trimmed
  • Cisco Sys Inc(CSCO)MFS Investment Management trimmed; Fidelity (FMR LLC) added
  • Gilead Sciences Inc(GILD)MFS Investment Management added; Fidelity (FMR LLC) trimmed
MFS Investment Management: the recordFidelity (FMR LLC): the record

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