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Tudor Investment Corp and Marshall Wace LLP: where the books meet

At Q2 2026, at least 12% of the two 13F books was the same, across 116 stocks both listed, against 7.2% 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%10%19%Q2 2013: 7.2%, 32 in bothQ1 2014: 13%, 149 in both14Q2 2014: 12%, 162 in bothQ3 2014: 15%, 164 in bothQ4 2014: 13%, 161 in bothQ1 2015: 15%, 160 in both15Q2 2015: 14%, 164 in bothQ3 2015: 14%, 160 in bothQ4 2015: 14%, 160 in bothQ1 2016: 13%, 136 in both16Q2 2016: 11%, 155 in bothQ3 2016: 19%, 179 in bothQ4 2016: 16%, 170 in bothQ1 2017: 16%, 99 in both17Q2 2017: 19%, 107 in bothQ3 2017: 14%, 117 in bothQ4 2017: 8.6%, 126 in bothQ1 2018: 15%, 134 in both18Q2 2018: 17%, 182 in bothQ3 2018: 14%, 158 in bothQ4 2018: 7.6%, 133 in bothQ1 2019: 13%, 131 in both19Q2 2019: 13%, 140 in bothQ3 2019: 15%, 139 in bothQ4 2019: 15%, 137 in bothQ1 2020: 18%, 151 in both20Q2 2020: 15%, 145 in bothQ3 2020: 17%, 163 in bothQ4 2020: 13%, 130 in bothQ1 2021: 12%, 114 in both21Q2 2021: 10%, 108 in bothQ3 2021: 8.6%, 88 in bothQ4 2021: 14%, 140 in bothQ1 2022: 14%, 131 in both22Q2 2022: 13%, 124 in bothQ3 2022: 13%, 128 in bothQ4 2022: 10%, 102 in bothQ1 2023: 13%, 116 in both23Q2 2023: 15%, 110 in bothQ3 2023: 12%, 123 in bothQ4 2023: 11%, 101 in bothQ1 2024: 11%, 104 in both24Q2 2024: 12%, 130 in bothQ3 2024: 8.4%, 106 in bothQ4 2024: 9.2%, 115 in bothQ1 2025: 8.6%, 113 in both25Q2 2025: 5.7%, 81 in bothQ3 2025: 6.1%, 79 in bothQ4 2025: 10%, 97 in bothQ1 2026: 9.7%, 109 in both26Q2 2026: 12%, 116 in both
  • Q2 2013: 7.2%, 32 in both
  • Q1 2014: 13%, 149 in both
  • Q2 2014: 12%, 162 in both
  • Q3 2014: 15%, 164 in both
  • Q4 2014: 13%, 161 in both
  • Q1 2015: 15%, 160 in both
  • Q2 2015: 14%, 164 in both
  • Q3 2015: 14%, 160 in both
  • Q4 2015: 14%, 160 in both
  • Q1 2016: 13%, 136 in both
  • Q2 2016: 11%, 155 in both
  • Q3 2016: 19%, 179 in both
  • Q4 2016: 16%, 170 in both
  • Q1 2017: 16%, 99 in both
  • Q2 2017: 19%, 107 in both
  • Q3 2017: 14%, 117 in both
  • Q4 2017: 8.6%, 126 in both
  • Q1 2018: 15%, 134 in both
  • Q2 2018: 17%, 182 in both
  • Q3 2018: 14%, 158 in both
  • Q4 2018: 7.6%, 133 in both
  • Q1 2019: 13%, 131 in both
  • Q2 2019: 13%, 140 in both
  • Q3 2019: 15%, 139 in both
  • Q4 2019: 15%, 137 in both
  • Q1 2020: 18%, 151 in both
  • Q2 2020: 15%, 145 in both
  • Q3 2020: 17%, 163 in both
  • Q4 2020: 13%, 130 in both
  • Q1 2021: 12%, 114 in both
  • Q2 2021: 10%, 108 in both
  • Q3 2021: 8.6%, 88 in both
  • Q4 2021: 14%, 140 in both
  • Q1 2022: 14%, 131 in both
  • Q2 2022: 13%, 124 in both
  • Q3 2022: 13%, 128 in both
  • Q4 2022: 10%, 102 in both
  • Q1 2023: 13%, 116 in both
  • Q2 2023: 15%, 110 in both
  • Q3 2023: 12%, 123 in both
  • Q4 2023: 11%, 101 in both
  • Q1 2024: 11%, 104 in both
  • Q2 2024: 12%, 130 in both
  • Q3 2024: 8.4%, 106 in both
  • Q4 2024: 9.2%, 115 in both
  • Q1 2025: 8.6%, 113 in both
  • Q2 2025: 5.7%, 81 in both
  • Q3 2025: 6.1%, 79 in both
  • Q4 2025: 10%, 97 in both
  • Q1 2026: 9.7%, 109 in both
  • Q2 2026: 12%, 116 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.

StockTudor Investment CorpMarshall Wace LLP
iShares Core S&P 500 ETF(IVV)1.7%Added24%Added
Microsoft Corporation(MSFT)0.9%Added1.0%Trimmed
Taiwan Semiconductor Co. Ltd. - ADR(TSM)0.9%Added0.7%Trimmed
Nvidia Corporation(NVDA)0.7%Added1.4%Trimmed
Micron Technology Incorporated(MU)0.5%Trimmed1.2%Added
Tesla Motors Inc(TSLA)0.4%Added0.7%Added
Amazon.Com Incorporated(AMZN)0.4%Added1.8%Added
Facebook Inc-a(META)0.3%Added0.4%Trimmed
80004c200(SNDK)0.3%Added0.4%Trimmed
Intel Corporation(INTC)0.2%Added0.3%Trimmed
NetFlix Inc.(NFLX)0.3%Added0.2%Added
Palantir Technologies Inc-a(PLTR)0.2%Added0.2%Trimmed
Norfolk Southern Corp.(NSC)0.3%Added0.2%Added
United HealthCare Group(UNH)0.2%Trimmed0.6%Added
Alphabet Inc.(GOOGL)0.2%Trimmed0.6%Trimmed
Alphabet Inc. - C Shares(GOOG)0.2%Added0.2%Trimmed
Warner Bros Discovery Inc - A(WBD)0.3%Added0.1%Added
Texas Instruments Incorporated(TXN)0.1%New0.4%Added
Advanced Micro Devices Incorporated(AMD)0.1%Trimmed1.8%Added
Oracle Corporation(ORCL)0.3%New0.1%Added

and 96 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.

  • Apple Inc(AAPL)Tudor Investment Corp trimmed; Marshall Wace LLP added
  • Advanced Micro Devices Incorporated(AMD)Tudor Investment Corp trimmed; Marshall Wace LLP added
  • Nvidia Corporation(NVDA)Tudor Investment Corp added; Marshall Wace LLP trimmed
  • Micron Technology Incorporated(MU)Tudor Investment Corp trimmed; Marshall Wace LLP added
  • Microsoft Corporation(MSFT)Tudor Investment Corp added; Marshall Wace LLP trimmed
  • Taiwan Semiconductor Co. Ltd. - ADR(TSM)Tudor Investment Corp added; Marshall Wace LLP trimmed
  • Hilton Worldwide Holdings In(HLT)Tudor Investment Corp added; Marshall Wace LLP trimmed
  • United HealthCare Group(UNH)Tudor Investment Corp trimmed; Marshall Wace LLP added
  • Facebook Inc-a(META)Tudor Investment Corp added; Marshall Wace LLP trimmed
  • 80004c200(SNDK)Tudor Investment Corp added; Marshall Wace LLP trimmed
  • Chevron Corporation(CVX)Tudor Investment Corp added; Marshall Wace LLP trimmed
  • G39387108(GFS)Tudor Investment Corp added; Marshall Wace LLP trimmed
Tudor Investment Corp: the recordMarshall Wace LLP: the record

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