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← Citadel Advisors LLC, its record

Citadel Advisors LLC and Squarepoint Ops LLC: where the books meet

At Q2 2026, at least 7.3% of the two 13F books was the same, across 96 stocks both listed, against 14% at Q4 2015. 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%7%14%Q4 2015: 14%, 138 in bothQ1 2016: 12%, 133 in both16Q2 2016: 10%, 128 in bothQ3 2016: 10%, 116 in bothQ4 2016: 9.5%, 105 in bothQ1 2017: 12%, 143 in both17Q2 2017: 13%, 135 in bothQ3 2017: 12%, 127 in bothQ4 2017: 13%, 138 in bothQ1 2018: 11%, 134 in both18Q2 2018: 11%, 137 in bothQ3 2018: 11%, 131 in bothQ4 2018: 9.7%, 113 in bothQ1 2019: 9.6%, 121 in both19Q2 2019: 9.9%, 125 in bothQ3 2019: 9.1%, 125 in bothQ4 2019: 9.4%, 130 in bothQ1 2020: 7.8%, 110 in both20Q2 2020: 6.3%, 101 in bothQ3 2020: 5.8%, 93 in bothQ4 2020: 6.6%, 108 in bothQ1 2021: 4.9%, 78 in both21Q2 2021: 3.0%, 59 in bothQ3 2021: 3.1%, 54 in bothQ4 2021: 3.5%, 64 in bothQ1 2022: 2.9%, 54 in both22Q2 2022: 3.1%, 59 in bothQ3 2022: 3.7%, 63 in bothQ4 2022: 3.8%, 68 in bothQ1 2023: 3.9%, 66 in both23Q2 2023: 4.1%, 68 in bothQ3 2023: 4.3%, 58 in bothQ4 2023: 4.7%, 59 in bothQ1 2024: 3.7%, 55 in both24Q2 2024: 4.6%, 64 in bothQ3 2024: 3.1%, 59 in bothQ4 2024: 3.5%, 65 in bothQ1 2025: 3.2%, 56 in both25Q2 2025: 3.8%, 58 in bothQ3 2025: 4.7%, 69 in bothQ4 2025: 6.7%, 88 in bothQ1 2026: 6.9%, 92 in both26Q2 2026: 7.3%, 96 in both
  • Q4 2015: 14%, 138 in both
  • Q1 2016: 12%, 133 in both
  • Q2 2016: 10%, 128 in both
  • Q3 2016: 10%, 116 in both
  • Q4 2016: 9.5%, 105 in both
  • Q1 2017: 12%, 143 in both
  • Q2 2017: 13%, 135 in both
  • Q3 2017: 12%, 127 in both
  • Q4 2017: 13%, 138 in both
  • Q1 2018: 11%, 134 in both
  • Q2 2018: 11%, 137 in both
  • Q3 2018: 11%, 131 in both
  • Q4 2018: 9.7%, 113 in both
  • Q1 2019: 9.6%, 121 in both
  • Q2 2019: 9.9%, 125 in both
  • Q3 2019: 9.1%, 125 in both
  • Q4 2019: 9.4%, 130 in both
  • Q1 2020: 7.8%, 110 in both
  • Q2 2020: 6.3%, 101 in both
  • Q3 2020: 5.8%, 93 in both
  • Q4 2020: 6.6%, 108 in both
  • Q1 2021: 4.9%, 78 in both
  • Q2 2021: 3.0%, 59 in both
  • Q3 2021: 3.1%, 54 in both
  • Q4 2021: 3.5%, 64 in both
  • Q1 2022: 2.9%, 54 in both
  • Q2 2022: 3.1%, 59 in both
  • Q3 2022: 3.7%, 63 in both
  • Q4 2022: 3.8%, 68 in both
  • Q1 2023: 3.9%, 66 in both
  • Q2 2023: 4.1%, 68 in both
  • Q3 2023: 4.3%, 58 in both
  • Q4 2023: 4.7%, 59 in both
  • Q1 2024: 3.7%, 55 in both
  • Q2 2024: 4.6%, 64 in both
  • Q3 2024: 3.1%, 59 in both
  • Q4 2024: 3.5%, 65 in both
  • Q1 2025: 3.2%, 56 in both
  • Q2 2025: 3.8%, 58 in both
  • Q3 2025: 4.7%, 69 in both
  • Q4 2025: 6.7%, 88 in both
  • Q1 2026: 6.9%, 92 in both
  • Q2 2026: 7.3%, 96 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.

StockCitadel Advisors LLCSquarepoint Ops LLC
iShares Trust(IVV)1.5%Added6.6%Trimmed
Amazon Com Inc(AMZN)0.3%Added1.0%Added
Nvidia Corp(NVDA)0.3%Trimmed0.9%Added
Apple Inc(AAPL)0.2%Added0.9%Added
Microsoft Corp(MSFT)0.2%Added0.8%Trimmed
Electronic Arts Inc(EA)0.1%Added0.2%Trimmed
934423104(WBD)0.1%Added0.1%Added
Lilly Eli & Co(LLY)0.1%Added0.3%Trimmed
Broadcom Inc(AVGO)0.1%Trimmed0.4%Trimmed
Alphabet Inc(GOOGL)0.1%Added0.2%Trimmed
Advanced Micro Devices Inc(AMD)0.1%Added0.7%Added
Alphabet Inc(GOOG)0.1%Added0.1%Trimmed
84615q103(SPCX)0.1%New0.2%New
Applied Matls Inc(AMAT)under 0.1%Trimmed0.8%Added
Kla-tencor Corp(KLAC)under 0.1%Added0.4%Added
Abbott Labs(ABT)under 0.1%Addedunder 0.1%Added
Oracle Corp(ORCL)under 0.1%Added0.1%Added
Micron Technology Inc(MU)under 0.1%Trimmed0.6%Trimmed
O Reilly Automotive Inc New(ORLY)under 0.1%Added0.2%Trimmed
Netflix Inc(NFLX)under 0.1%Added0.2%Added

and 76 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.

  • iShares Trust(IVV)Citadel Advisors LLC added; Squarepoint Ops LLC trimmed
  • Nvidia Corp(NVDA)Citadel Advisors LLC trimmed; Squarepoint Ops LLC added
  • Microsoft Corp(MSFT)Citadel Advisors LLC added; Squarepoint Ops LLC trimmed
  • Electronic Arts Inc(EA)Citadel Advisors LLC added; Squarepoint Ops LLC trimmed
  • Lilly Eli & Co(LLY)Citadel Advisors LLC added; Squarepoint Ops LLC trimmed
  • Alphabet Inc(GOOGL)Citadel Advisors LLC added; Squarepoint Ops LLC trimmed
  • 09290d101(BLK)Citadel Advisors LLC added; Squarepoint Ops LLC trimmed
  • Alphabet Inc(GOOG)Citadel Advisors LLC added; Squarepoint Ops LLC trimmed
  • Applied Matls Inc(AMAT)Citadel Advisors LLC trimmed; Squarepoint Ops LLC added
  • 443201108(HWM)Citadel Advisors LLC added; Squarepoint Ops LLC trimmed
  • Seagate Technology Hldngs PL(STX)Citadel Advisors LLC added; Squarepoint Ops LLC trimmed
  • O Reilly Automotive Inc New(ORLY)Citadel Advisors LLC added; Squarepoint Ops LLC trimmed
Citadel Advisors LLC: the recordSquarepoint Ops LLC: the record

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