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← Acadian Asset Management LLC, its record

Acadian Asset Management LLC and T. Rowe Price Associates Inc: where the books meet

At Q2 2026, at least 46% of the two 13F books was the same, across 194 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%23%46%Q2 2013: 0.0%, 0 in bothQ3 2013: 11%, 94 in bothQ4 2013: 12%, 96 in bothQ1 2014: 10%, 91 in both14Q2 2014: 9.9%, 101 in bothQ3 2014: 11%, 104 in bothQ4 2014: 11%, 99 in bothQ1 2015: 11%, 95 in both15Q2 2015: 12%, 101 in bothQ3 2015: 11%, 100 in bothQ4 2015: 11%, 91 in bothQ1 2016: 10%, 89 in both16Q2 2016: 13%, 82 in bothQ3 2016: 15%, 96 in bothQ4 2016: 16%, 101 in bothQ1 2017: 16%, 89 in both17Q2 2017: 17%, 107 in bothQ3 2017: 20%, 112 in bothQ4 2017: 19%, 123 in bothQ1 2018: 17%, 123 in both18Q2 2018: 17%, 119 in bothQ3 2018: 17%, 103 in bothQ4 2018: 18%, 104 in bothQ1 2019: 19%, 113 in both19Q2 2019: 17%, 103 in bothQ3 2019: 19%, 113 in bothQ4 2019: 18%, 93 in bothQ1 2020: 22%, 106 in both20Q2 2020: 24%, 124 in bothQ3 2020: 22%, 123 in bothQ4 2020: 23%, 142 in bothQ1 2021: 23%, 138 in both21Q2 2021: 21%, 133 in bothQ3 2021: 21%, 144 in bothQ4 2021: 22%, 140 in bothQ1 2022: 22%, 152 in both22Q2 2022: 22%, 158 in bothQ3 2022: 23%, 166 in bothQ4 2022: 25%, 185 in bothQ1 2023: 24%, 182 in both23Q2 2023: 27%, 165 in bothQ3 2023: 26%, 164 in bothQ4 2023: 27%, 152 in bothQ1 2024: 29%, 160 in both24Q2 2024: 35%, 184 in bothQ3 2024: 30%, 174 in bothQ4 2024: 32%, 168 in bothQ1 2025: 34%, 182 in both25Q2 2025: 40%, 198 in bothQ3 2025: 43%, 202 in bothQ4 2025: 44%, 199 in bothQ1 2026: 44%, 210 in both26Q2 2026: 46%, 194 in both
  • Q2 2013: 0.0%, 0 in both
  • Q3 2013: 11%, 94 in both
  • Q4 2013: 12%, 96 in both
  • Q1 2014: 10%, 91 in both
  • Q2 2014: 9.9%, 101 in both
  • Q3 2014: 11%, 104 in both
  • Q4 2014: 11%, 99 in both
  • Q1 2015: 11%, 95 in both
  • Q2 2015: 12%, 101 in both
  • Q3 2015: 11%, 100 in both
  • Q4 2015: 11%, 91 in both
  • Q1 2016: 10%, 89 in both
  • Q2 2016: 13%, 82 in both
  • Q3 2016: 15%, 96 in both
  • Q4 2016: 16%, 101 in both
  • Q1 2017: 16%, 89 in both
  • Q2 2017: 17%, 107 in both
  • Q3 2017: 20%, 112 in both
  • Q4 2017: 19%, 123 in both
  • Q1 2018: 17%, 123 in both
  • Q2 2018: 17%, 119 in both
  • Q3 2018: 17%, 103 in both
  • Q4 2018: 18%, 104 in both
  • Q1 2019: 19%, 113 in both
  • Q2 2019: 17%, 103 in both
  • Q3 2019: 19%, 113 in both
  • Q4 2019: 18%, 93 in both
  • Q1 2020: 22%, 106 in both
  • Q2 2020: 24%, 124 in both
  • Q3 2020: 22%, 123 in both
  • Q4 2020: 23%, 142 in both
  • Q1 2021: 23%, 138 in both
  • Q2 2021: 21%, 133 in both
  • Q3 2021: 21%, 144 in both
  • Q4 2021: 22%, 140 in both
  • Q1 2022: 22%, 152 in both
  • Q2 2022: 22%, 158 in both
  • Q3 2022: 23%, 166 in both
  • Q4 2022: 25%, 185 in both
  • Q1 2023: 24%, 182 in both
  • Q2 2023: 27%, 165 in both
  • Q3 2023: 26%, 164 in both
  • Q4 2023: 27%, 152 in both
  • Q1 2024: 29%, 160 in both
  • Q2 2024: 35%, 184 in both
  • Q3 2024: 30%, 174 in both
  • Q4 2024: 32%, 168 in both
  • Q1 2025: 34%, 182 in both
  • Q2 2025: 40%, 198 in both
  • Q3 2025: 43%, 202 in both
  • Q4 2025: 44%, 199 in both
  • Q1 2026: 44%, 210 in both
  • Q2 2026: 46%, 194 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 LLCT. Rowe Price Associates Inc
Nvidia Corp(NVDA)4.6%Added7.4%Trimmed
Apple Inc(AAPL)5.5%Added4.6%Trimmed
Alphabet Inc(GOOGL)2.6%Trimmed3.6%Added
Amazon Com Inc(AMZN)2.4%Added2.6%Trimmed
Microsoft Corp(MSFT)2.1%Trimmed3.3%Trimmed
Micron Technology Inc(MU)1.6%Trimmed1.6%Added
Facebook Inc(META)1.3%Added1.7%Trimmed
Broadcom LTD(AVGO)1.3%Added3.1%Trimmed
Alphabet Inc(GOOG)1.2%Trimmed2.1%Trimmed
Lam Research Corp(LRCX)1.1%Trimmed1.1%Added
Applied Matls Inc(AMAT)1.7%Trimmed0.9%Added
JP Morgan Chase &(JPM)0.9%Trimmed0.9%Added
Eli Lilly & Co(LLY)0.7%Trimmed1.7%Trimmed
Advanced Micro Devices Inc(AMD)0.7%Added2.1%Added
Unitedhealth Group Inc(UNH)0.6%Added1.0%Added
Kla-tencor Corp(KLAC)1.2%Added0.5%Added
Cisco Sys Inc(CSCO)0.8%Added0.5%Trimmed
Bank of America Corporation(BAC)0.5%Trimmed0.5%Trimmed
Berkshire Hathaway Inc Del(BRK-B)0.7%Trimmed0.5%Trimmed
Intel Corp(INTC)0.5%Added0.7%Added

and 174 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; T. Rowe Price Associates Inc trimmed
  • Apple Inc(AAPL)Acadian Asset Management LLC added; T. Rowe Price Associates Inc trimmed
  • Alphabet Inc(GOOGL)Acadian Asset Management LLC trimmed; T. Rowe Price Associates Inc added
  • Broadcom LTD(AVGO)Acadian Asset Management LLC added; T. Rowe Price Associates Inc trimmed
  • Amazon Com Inc(AMZN)Acadian Asset Management LLC added; T. Rowe Price Associates Inc trimmed
  • Facebook Inc(META)Acadian Asset Management LLC added; T. Rowe Price Associates Inc trimmed
  • Micron Technology Inc(MU)Acadian Asset Management LLC trimmed; T. Rowe Price Associates Inc added
  • Lam Research Corp(LRCX)Acadian Asset Management LLC trimmed; T. Rowe Price Associates Inc added
  • Tesla MTRS Inc(TSLA)Acadian Asset Management LLC trimmed; T. Rowe Price Associates Inc added
  • Mastercard Inc(MA)Acadian Asset Management LLC added; T. Rowe Price Associates Inc trimmed
  • Applied Matls Inc(AMAT)Acadian Asset Management LLC trimmed; T. Rowe Price Associates Inc added
  • JP Morgan Chase &(JPM)Acadian Asset Management LLC trimmed; T. Rowe Price Associates Inc added
Acadian Asset Management LLC: the recordT. Rowe Price Associates Inc: the record

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