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← Acadian Asset Management LLC, its record

Acadian Asset Management LLC and AllianceBernstein LP: where the books meet

At Q2 2026, at least 40% of the two 13F books was the same, across 174 stocks both listed, against 0.0% 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%20%40%Q2 2013: 0.0%, 0 in bothQ3 2013: 16%, 102 in bothQ4 2013: 18%, 111 in bothQ1 2014: 17%, 117 in both14Q2 2014: 15%, 120 in bothQ3 2014: 16%, 113 in bothQ4 2014: 16%, 105 in bothQ1 2015: 16%, 110 in both15Q2 2015: 17%, 114 in bothQ3 2015: 15%, 118 in bothQ4 2015: 16%, 118 in bothQ1 2016: 14%, 115 in both16Q2 2016: 17%, 106 in bothQ3 2016: 20%, 110 in bothQ4 2016: 21%, 115 in bothQ1 2017: 21%, 113 in both17Q2 2017: 22%, 123 in bothQ3 2017: 23%, 120 in bothQ4 2017: 23%, 123 in bothQ1 2018: 24%, 135 in both18Q2 2018: 21%, 120 in bothQ3 2018: 21%, 114 in bothQ4 2018: 22%, 127 in bothQ1 2019: 23%, 132 in both19Q2 2019: 20%, 109 in bothQ3 2019: 22%, 130 in bothQ4 2019: 21%, 117 in bothQ1 2020: 25%, 128 in both20Q2 2020: 27%, 137 in bothQ3 2020: 25%, 128 in bothQ4 2020: 23%, 138 in bothQ1 2021: 24%, 146 in both21Q2 2021: 23%, 141 in bothQ3 2021: 22%, 148 in bothQ4 2021: 24%, 142 in bothQ1 2022: 23%, 154 in both22Q2 2022: 22%, 160 in bothQ3 2022: 23%, 151 in bothQ4 2022: 23%, 161 in bothQ1 2023: 23%, 166 in both23Q2 2023: 25%, 154 in bothQ3 2023: 23%, 149 in bothQ4 2023: 24%, 150 in bothQ1 2024: 27%, 150 in both24Q2 2024: 31%, 167 in bothQ3 2024: 26%, 147 in bothQ4 2024: 28%, 151 in bothQ1 2025: 32%, 160 in both25Q2 2025: 37%, 173 in bothQ3 2025: 39%, 188 in bothQ4 2025: 40%, 183 in bothQ1 2026: 39%, 196 in both26Q2 2026: 40%, 174 in both
  • Q2 2013: 0.0%, 0 in both
  • Q3 2013: 16%, 102 in both
  • Q4 2013: 18%, 111 in both
  • Q1 2014: 17%, 117 in both
  • Q2 2014: 15%, 120 in both
  • Q3 2014: 16%, 113 in both
  • Q4 2014: 16%, 105 in both
  • Q1 2015: 16%, 110 in both
  • Q2 2015: 17%, 114 in both
  • Q3 2015: 15%, 118 in both
  • Q4 2015: 16%, 118 in both
  • Q1 2016: 14%, 115 in both
  • Q2 2016: 17%, 106 in both
  • Q3 2016: 20%, 110 in both
  • Q4 2016: 21%, 115 in both
  • Q1 2017: 21%, 113 in both
  • Q2 2017: 22%, 123 in both
  • Q3 2017: 23%, 120 in both
  • Q4 2017: 23%, 123 in both
  • Q1 2018: 24%, 135 in both
  • Q2 2018: 21%, 120 in both
  • Q3 2018: 21%, 114 in both
  • Q4 2018: 22%, 127 in both
  • Q1 2019: 23%, 132 in both
  • Q2 2019: 20%, 109 in both
  • Q3 2019: 22%, 130 in both
  • Q4 2019: 21%, 117 in both
  • Q1 2020: 25%, 128 in both
  • Q2 2020: 27%, 137 in both
  • Q3 2020: 25%, 128 in both
  • Q4 2020: 23%, 138 in both
  • Q1 2021: 24%, 146 in both
  • Q2 2021: 23%, 141 in both
  • Q3 2021: 22%, 148 in both
  • Q4 2021: 24%, 142 in both
  • Q1 2022: 23%, 154 in both
  • Q2 2022: 22%, 160 in both
  • Q3 2022: 23%, 151 in both
  • Q4 2022: 23%, 161 in both
  • Q1 2023: 23%, 166 in both
  • Q2 2023: 25%, 154 in both
  • Q3 2023: 23%, 149 in both
  • Q4 2023: 24%, 150 in both
  • Q1 2024: 27%, 150 in both
  • Q2 2024: 31%, 167 in both
  • Q3 2024: 26%, 147 in both
  • Q4 2024: 28%, 151 in both
  • Q1 2025: 32%, 160 in both
  • Q2 2025: 37%, 173 in both
  • Q3 2025: 39%, 188 in both
  • Q4 2025: 40%, 183 in both
  • Q1 2026: 39%, 196 in both
  • Q2 2026: 40%, 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.

StockAcadian Asset Management LLCAllianceBernstein LP
Nvidia Corp(NVDA)4.6%Added5.6%Trimmed
Apple Inc(AAPL)5.5%Added3.6%Added
Amazon Com Inc(AMZN)2.4%Added2.6%Trimmed
Microsoft Corp(MSFT)2.1%Trimmed3.2%Trimmed
Facebook Inc(META)1.3%Added2.3%Trimmed
Broadcom LTD(AVGO)1.3%Added2.4%Trimmed
Kla-tencor Corp(KLAC)1.2%Added3.6%Added
Alphabet Inc(GOOG)1.2%Trimmed3.5%Trimmed
Alphabet Inc(GOOGL)2.6%Trimmed1.1%Added
Costco WHSL Corp New(COST)1.3%Added0.8%Trimmed
Eli Lilly & Co(LLY)0.7%Trimmed1.3%Trimmed
TJX Cos Inc New(TJX)0.8%Added0.7%Trimmed
Booking Holdings Inc(BKNG)0.6%Added2.6%Added
Applied Matls Inc(AMAT)1.7%Trimmed0.6%Trimmed
Berkshire Hathaway Inc Del(BRK-B)0.7%Trimmed0.6%Trimmed
Unitedhealth Group Inc(UNH)0.6%Added0.7%Added
JP Morgan Chase &(JPM)0.9%Trimmed0.5%Added
Merck & Co Inc New(MRK)0.6%Trimmed0.5%Added
Exxon Mobil Corp(XOM)0.5%Trimmed0.6%Added
Bank of America Corporation(BAC)0.5%Trimmed0.4%Added

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)Acadian Asset Management LLC added; AllianceBernstein LP trimmed
  • Amazon Com Inc(AMZN)Acadian Asset Management LLC added; AllianceBernstein LP trimmed
  • Broadcom LTD(AVGO)Acadian Asset Management LLC added; AllianceBernstein LP trimmed
  • Facebook Inc(META)Acadian Asset Management LLC added; AllianceBernstein LP trimmed
  • Alphabet Inc(GOOGL)Acadian Asset Management LLC trimmed; AllianceBernstein LP added
  • Netflix Inc(NFLX)Acadian Asset Management LLC added; AllianceBernstein LP trimmed
  • Costco WHSL Corp New(COST)Acadian Asset Management LLC added; AllianceBernstein LP trimmed
  • TJX Cos Inc New(TJX)Acadian Asset Management LLC added; AllianceBernstein LP trimmed
  • Exxon Mobil Corp(XOM)Acadian Asset Management LLC trimmed; AllianceBernstein LP added
  • General Electric Co(GE)Acadian Asset Management LLC trimmed; AllianceBernstein LP added
  • JP Morgan Chase &(JPM)Acadian Asset Management LLC trimmed; AllianceBernstein LP added
  • Merck & Co Inc New(MRK)Acadian Asset Management LLC trimmed; AllianceBernstein LP added
Acadian Asset Management LLC: the recordAllianceBernstein LP: the record

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