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Marshall Wace LLP and Neuberger Berman Group LLC: where the books meet

At Q2 2026, at least 29% of the two 13F books was the same, across 174 stocks both listed, against 5.5% 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%17%34%Q2 2013: 5.5%, 39 in bothQ1 2014: 16%, 135 in both14Q2 2014: 16%, 137 in bothQ3 2014: 17%, 147 in bothQ4 2014: 18%, 147 in bothQ1 2015: 17%, 138 in both15Q2 2015: 20%, 154 in bothQ3 2015: 20%, 154 in bothQ4 2015: 20%, 139 in bothQ1 2016: 20%, 150 in both16Q2 2016: 16%, 131 in bothQ3 2016: 17%, 143 in bothQ4 2016: 19%, 152 in bothQ1 2017: 13%, 90 in both17Q2 2017: 14%, 104 in bothQ3 2017: 15%, 116 in bothQ4 2017: 15%, 129 in bothQ1 2018: 15%, 150 in both18Q2 2018: 18%, 159 in bothQ3 2018: 16%, 140 in bothQ4 2018: 15%, 120 in bothQ1 2019: 16%, 121 in both19Q2 2019: 17%, 142 in bothQ3 2019: 20%, 151 in bothQ4 2019: 19%, 147 in bothQ1 2020: 21%, 151 in both20Q2 2020: 25%, 165 in bothQ3 2020: 23%, 155 in bothQ4 2020: 19%, 145 in bothQ1 2021: 18%, 145 in both21Q2 2021: 19%, 139 in bothQ3 2021: 16%, 115 in bothQ4 2021: 27%, 168 in bothQ1 2022: 25%, 168 in both22Q2 2022: 25%, 159 in bothQ3 2022: 24%, 160 in bothQ4 2022: 24%, 149 in bothQ1 2023: 26%, 153 in both23Q2 2023: 28%, 151 in bothQ3 2023: 29%, 166 in bothQ4 2023: 27%, 153 in bothQ1 2024: 30%, 169 in both24Q2 2024: 33%, 172 in bothQ3 2024: 32%, 173 in bothQ4 2024: 32%, 172 in bothQ1 2025: 29%, 166 in both25Q2 2025: 34%, 181 in bothQ3 2025: 30%, 166 in bothQ4 2025: 31%, 174 in bothQ1 2026: 30%, 177 in both26Q2 2026: 29%, 174 in both
  • Q2 2013: 5.5%, 39 in both
  • Q1 2014: 16%, 135 in both
  • Q2 2014: 16%, 137 in both
  • Q3 2014: 17%, 147 in both
  • Q4 2014: 18%, 147 in both
  • Q1 2015: 17%, 138 in both
  • Q2 2015: 20%, 154 in both
  • Q3 2015: 20%, 154 in both
  • Q4 2015: 20%, 139 in both
  • Q1 2016: 20%, 150 in both
  • Q2 2016: 16%, 131 in both
  • Q3 2016: 17%, 143 in both
  • Q4 2016: 19%, 152 in both
  • Q1 2017: 13%, 90 in both
  • Q2 2017: 14%, 104 in both
  • Q3 2017: 15%, 116 in both
  • Q4 2017: 15%, 129 in both
  • Q1 2018: 15%, 150 in both
  • Q2 2018: 18%, 159 in both
  • Q3 2018: 16%, 140 in both
  • Q4 2018: 15%, 120 in both
  • Q1 2019: 16%, 121 in both
  • Q2 2019: 17%, 142 in both
  • Q3 2019: 20%, 151 in both
  • Q4 2019: 19%, 147 in both
  • Q1 2020: 21%, 151 in both
  • Q2 2020: 25%, 165 in both
  • Q3 2020: 23%, 155 in both
  • Q4 2020: 19%, 145 in both
  • Q1 2021: 18%, 145 in both
  • Q2 2021: 19%, 139 in both
  • Q3 2021: 16%, 115 in both
  • Q4 2021: 27%, 168 in both
  • Q1 2022: 25%, 168 in both
  • Q2 2022: 25%, 159 in both
  • Q3 2022: 24%, 160 in both
  • Q4 2022: 24%, 149 in both
  • Q1 2023: 26%, 153 in both
  • Q2 2023: 28%, 151 in both
  • Q3 2023: 29%, 166 in both
  • Q4 2023: 27%, 153 in both
  • Q1 2024: 30%, 169 in both
  • Q2 2024: 33%, 172 in both
  • Q3 2024: 32%, 173 in both
  • Q4 2024: 32%, 172 in both
  • Q1 2025: 29%, 166 in both
  • Q2 2025: 34%, 181 in both
  • Q3 2025: 30%, 166 in both
  • Q4 2025: 31%, 174 in both
  • Q1 2026: 30%, 177 in both
  • Q2 2026: 29%, 174 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.

StockMarshall Wace LLPNeuberger Berman Group LLC
Apple Inc(AAPL)2.1%Added3.3%Added
Amazon.com Inc(AMZN)1.8%Added3.1%Added
Nvidia Corp(NVDA)1.4%Trimmed4.1%Added
iShares-s&p 500(IVV)24%Added1.3%Added
Microsoft Corp(MSFT)1.0%Trimmed2.6%Trimmed
Micron Tech(MU)1.2%Added0.7%Trimmed
Google Inc-a(GOOGL)0.6%Trimmed2.4%Added
Johnson&johnson(JNJ)0.6%Added0.7%Added
Adv Micro Device(AMD)1.8%Added0.6%Trimmed
Costco Wholesale(COST)0.9%Added0.5%Trimmed
JP Morgan Chase(JPM)0.5%Added1.7%Added
Taiwan Semic-adr(TSM)0.7%Trimmed0.4%Trimmed
Facebook Inc-a(META)0.4%Trimmed0.9%Added
Morgan Stanley(MS)0.8%Added0.4%Added
Broadcom Inc(AVGO)0.4%Trimmed1.0%Trimmed
Texas Instrument(TXN)0.4%Added0.4%Added
Exxon Mobil Corp(XOM)0.3%Added0.6%Trimmed
Cisco Systems(CSCO)0.3%Added0.4%Trimmed
Applied Material(AMAT)0.3%Trimmed0.6%Added
Chevron Corp(CVX)0.3%Trimmed0.3%Trimmed

and 154 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)Marshall Wace LLP trimmed; Neuberger Berman Group LLC added
  • Google Inc-a(GOOGL)Marshall Wace LLP trimmed; Neuberger Berman Group LLC added
  • Alphabet Inc-c(GOOG)Marshall Wace LLP trimmed; Neuberger Berman Group LLC added
  • Adv Micro Device(AMD)Marshall Wace LLP added; Neuberger Berman Group LLC trimmed
  • Micron Tech(MU)Marshall Wace LLP added; Neuberger Berman Group LLC trimmed
  • Asml Holding-ny(ASML)Marshall Wace LLP trimmed; Neuberger Berman Group LLC added
  • Facebook Inc-a(META)Marshall Wace LLP trimmed; Neuberger Berman Group LLC added
  • Nextera Energy(NEE)Marshall Wace LLP added; Neuberger Berman Group LLC trimmed
  • Analog Devices(ADI)Marshall Wace LLP trimmed; Neuberger Berman Group LLC added
  • Costco Wholesale(COST)Marshall Wace LLP added; Neuberger Berman Group LLC trimmed
  • Berkshire Hath-b(BRK-B)Marshall Wace LLP trimmed; Neuberger Berman Group LLC added
  • Caterpillar Inc(CAT)Marshall Wace LLP added; Neuberger Berman Group LLC trimmed
Marshall Wace LLP: the recordNeuberger Berman Group LLC: the record

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