Harris Associates LP and MFS Investment Management: where the books meet
At Q2 2026, at least 13% of the two 13F books was the same, across 80 stocks both listed, against 21% 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.
- Q2 2013: 21%, 95 in both
- Q3 2013: 21%, 90 in both
- Q4 2013: 23%, 94 in both
- Q1 2014: 23%, 87 in both
- Q2 2014: 23%, 91 in both
- Q3 2014: 22%, 91 in both
- Q4 2014: 23%, 95 in both
- Q1 2015: 22%, 86 in both
- Q2 2015: 22%, 69 in both
- Q3 2015: 22%, 62 in both
- Q4 2015: 22%, 61 in both
- Q1 2016: 20%, 61 in both
- Q2 2016: 20%, 57 in both
- Q3 2016: 19%, 55 in both
- Q4 2016: 20%, 55 in both
- Q1 2017: 20%, 55 in both
- Q2 2017: 20%, 56 in both
- Q3 2017: 18%, 54 in both
- Q4 2017: 17%, 57 in both
- Q1 2018: 18%, 55 in both
- Q2 2018: 18%, 54 in both
- Q3 2018: 18%, 55 in both
- Q4 2018: 17%, 57 in both
- Q1 2019: 17%, 58 in both
- Q2 2019: 16%, 59 in both
- Q3 2019: 16%, 58 in both
- Q4 2019: 16%, 58 in both
- Q1 2020: 15%, 57 in both
- Q2 2020: 15%, 60 in both
- Q3 2020: 15%, 58 in both
- Q4 2020: 15%, 61 in both
- Q1 2021: 15%, 64 in both
- Q2 2021: 16%, 64 in both
- Q3 2021: 15%, 67 in both
- Q4 2021: 16%, 70 in both
- Q1 2022: 17%, 71 in both
- Q2 2022: 17%, 72 in both
- Q3 2022: 16%, 74 in both
- Q4 2022: 17%, 77 in both
- Q1 2023: 17%, 76 in both
- Q2 2023: 17%, 72 in both
- Q3 2023: 17%, 68 in both
- Q4 2023: 17%, 68 in both
- Q1 2024: 16%, 67 in both
- Q2 2024: 15%, 65 in both
- Q3 2024: 13%, 70 in both
- Q4 2024: 13%, 71 in both
- Q1 2025: 14%, 70 in both
- Q2 2025: 14%, 85 in both
- Q3 2025: 13%, 89 in both
- Q4 2025: 13%, 81 in both
- Q1 2026: 14%, 78 in both
- Q2 2026: 13%, 80 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.
| Stock | Harris Associates LP | MFS Investment Management |
|---|---|---|
| Alphabet Inc(GOOGL) | 3.0%Trimmed | 3.3%Added |
| Amazon Com Inc(AMZN) | 1.5%Trimmed | 2.8%Added |
| Willis Towers Watson Pub LTD(WTW) | 2.0%Trimmed | 0.7%Trimmed |
| Schwab Charles Corp New(SCHW) | 3.0%Added | 0.7%Trimmed |
| Conocophillips(COP) | 2.1%Trimmed | 0.6%Trimmed |
| Nasdaq Inc(NDAQ) | 0.8%Added | 0.6%Trimmed |
| Union Pac Corp(UNP) | 1.4%Added | 0.6%Trimmed |
| Citigroup Inc(C) | 1.6%Trimmed | 0.5%Trimmed |
| Becton Dickinson & Co(BDX) | 0.5%Added | 0.8%Trimmed |
| Wells Fargo & Co New(WFC) | 1.2%Trimmed | 0.3%Trimmed |
| Marsh & Mclennan Cos Inc(MRSH) | 1.9%Added | 0.3%Trimmed |
| Visa Inc(V) | 0.3%Trimmed | 0.8%Trimmed |
| Bank of America Corporation(BAC) | 1.7%Added | 0.3%Added |
| Elevance Health Inc(ELV) | 2.5%Added | 0.2%Trimmed |
| Equifax Inc(EFX) | 1.6%Trimmed | 0.2%Trimmed |
| Airbnb Inc(ABNB) | 3.6%Trimmed | 0.2%Added |
| Salesforce Com Inc(CRM) | 3.4%Added | 0.2%Trimmed |
| Alphabet Inc(GOOG) | 0.9%Added | 0.1%Added |
| Accenture PLC Ireland(ACN) | 0.5%Trimmed | 0.1%Trimmed |
| Masco Corp(MAS) | 0.9%Trimmed | 0.1%Added |
and 60 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)Harris Associates LP added; MFS Investment Management trimmed
- Alphabet Inc(GOOGL)Harris Associates LP trimmed; MFS Investment Management added
- Apple Inc(AAPL)Harris Associates LP trimmed; MFS Investment Management added
- Amazon Com Inc(AMZN)Harris Associates LP trimmed; MFS Investment Management added
- Microsoft Corp(MSFT)Harris Associates LP added; MFS Investment Management trimmed
- Broadcom Inc(AVGO)Harris Associates LP trimmed; MFS Investment Management added
- JPMorgan Chase & Co(JPM)Harris Associates LP added; MFS Investment Management trimmed
- Airbnb Inc(ABNB)Harris Associates LP trimmed; MFS Investment Management added
- Salesforce Com Inc(CRM)Harris Associates LP added; MFS Investment Management trimmed
- Becton Dickinson & Co(BDX)Harris Associates LP added; MFS Investment Management trimmed
- Schwab Charles Corp New(SCHW)Harris Associates LP added; MFS Investment Management trimmed
- Targa Res Corp(TRGP)Harris Associates LP trimmed; MFS Investment Management added
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