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← Citadel Advisors LLC, its record

Citadel Advisors LLC and Millennium Management LLC: where the books meet

At Q2 2026, at least 7.2% of the two 13F books was the same, across 99 stocks both listed, against 20% 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%10%20%Q4 2015: 20%, 177 in bothQ1 2016: 15%, 156 in both16Q2 2016: 16%, 157 in bothQ3 2016: 14%, 152 in bothQ4 2016: 14%, 134 in bothQ1 2017: 18%, 161 in both17Q2 2017: 17%, 164 in bothQ3 2017: 17%, 165 in bothQ4 2017: 18%, 182 in bothQ1 2018: 14%, 168 in both18Q2 2018: 14%, 153 in bothQ3 2018: 15%, 172 in bothQ4 2018: 12%, 144 in bothQ1 2019: 12%, 144 in both19Q2 2019: 12%, 139 in bothQ3 2019: 12%, 153 in bothQ4 2019: 12%, 147 in bothQ1 2020: 7.8%, 113 in both20Q2 2020: 7.3%, 113 in bothQ3 2020: 6.0%, 99 in bothQ4 2020: 6.5%, 112 in bothQ1 2021: 5.7%, 102 in both21Q2 2021: 4.1%, 75 in bothQ3 2021: 4.0%, 66 in bothQ4 2021: 4.0%, 69 in bothQ1 2022: 3.3%, 68 in both22Q2 2022: 3.8%, 72 in bothQ3 2022: 4.4%, 74 in bothQ4 2022: 5.2%, 86 in bothQ1 2023: 5.6%, 90 in both23Q2 2023: 5.7%, 100 in bothQ3 2023: 6.4%, 93 in bothQ4 2023: 6.5%, 90 in bothQ1 2024: 6.4%, 97 in both24Q2 2024: 7.1%, 99 in bothQ3 2024: 5.2%, 85 in bothQ4 2024: 5.6%, 99 in bothQ1 2025: 4.9%, 78 in both25Q2 2025: 6.0%, 94 in bothQ3 2025: 5.8%, 93 in bothQ4 2025: 7.2%, 99 in bothQ1 2026: 7.6%, 107 in both26Q2 2026: 7.2%, 99 in both
  • Q4 2015: 20%, 177 in both
  • Q1 2016: 15%, 156 in both
  • Q2 2016: 16%, 157 in both
  • Q3 2016: 14%, 152 in both
  • Q4 2016: 14%, 134 in both
  • Q1 2017: 18%, 161 in both
  • Q2 2017: 17%, 164 in both
  • Q3 2017: 17%, 165 in both
  • Q4 2017: 18%, 182 in both
  • Q1 2018: 14%, 168 in both
  • Q2 2018: 14%, 153 in both
  • Q3 2018: 15%, 172 in both
  • Q4 2018: 12%, 144 in both
  • Q1 2019: 12%, 144 in both
  • Q2 2019: 12%, 139 in both
  • Q3 2019: 12%, 153 in both
  • Q4 2019: 12%, 147 in both
  • Q1 2020: 7.8%, 113 in both
  • Q2 2020: 7.3%, 113 in both
  • Q3 2020: 6.0%, 99 in both
  • Q4 2020: 6.5%, 112 in both
  • Q1 2021: 5.7%, 102 in both
  • Q2 2021: 4.1%, 75 in both
  • Q3 2021: 4.0%, 66 in both
  • Q4 2021: 4.0%, 69 in both
  • Q1 2022: 3.3%, 68 in both
  • Q2 2022: 3.8%, 72 in both
  • Q3 2022: 4.4%, 74 in both
  • Q4 2022: 5.2%, 86 in both
  • Q1 2023: 5.6%, 90 in both
  • Q2 2023: 5.7%, 100 in both
  • Q3 2023: 6.4%, 93 in both
  • Q4 2023: 6.5%, 90 in both
  • Q1 2024: 6.4%, 97 in both
  • Q2 2024: 7.1%, 99 in both
  • Q3 2024: 5.2%, 85 in both
  • Q4 2024: 5.6%, 99 in both
  • Q1 2025: 4.9%, 78 in both
  • Q2 2025: 6.0%, 94 in both
  • Q3 2025: 5.8%, 93 in both
  • Q4 2025: 7.2%, 99 in both
  • Q1 2026: 7.6%, 107 in both
  • Q2 2026: 7.2%, 99 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 LLCMillennium Management LLC
iShares Trust(IVV)1.5%Added3.9%Added
Amazon Com Inc(AMZN)0.3%Added0.4%Added
Nvidia Corp(NVDA)0.3%Trimmed0.9%Added
Microsoft Corp(MSFT)0.2%Added0.6%Added
Electronic Arts Inc(EA)0.1%Added0.3%Added
Warner Bros Discovery Inc(WBD)0.1%Added0.6%Added
09290d101(BLK)0.1%Added0.2%Trimmed
Advanced Micro Devices Inc(AMD)0.1%Added0.2%Trimmed
Space Exploration Techn Corp(SPCX)0.1%New1.1%New
Abbvie Inc(ABBV)under 0.1%Added0.1%Added
Abbott Labs(ABT)under 0.1%Added0.1%Added
Mastercard Inc(MA)under 0.1%Added0.1%Trimmed
443201108(HWM)under 0.1%Addedunder 0.1%Trimmed
Applied Matls Inc(AMAT)under 0.1%Trimmedunder 0.1%Trimmed
Seagate Technology Hldngs PL(STX)under 0.1%Added0.2%Added
JPMorgan Chase & Co(JPM)under 0.1%Trimmed0.1%Trimmed
Oracle Corp(ORCL)under 0.1%Added0.1%Added
Lilly Eli & Co(LLY)0.1%Addedunder 0.1%Trimmed
Apple Inc(AAPL)0.2%Addedunder 0.1%Trimmed
Micron Technology Inc(MU)under 0.1%Trimmed0.2%Trimmed

and 79 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)Citadel Advisors LLC trimmed; Millennium Management LLC added
  • Apple Inc(AAPL)Citadel Advisors LLC added; Millennium Management LLC trimmed
  • Norfolk Southern Corp(NSC)Citadel Advisors LLC trimmed; Millennium Management LLC added
  • Lilly Eli & Co(LLY)Citadel Advisors LLC added; Millennium Management LLC trimmed
  • 09290d101(BLK)Citadel Advisors LLC added; Millennium Management LLC trimmed
  • Advanced Micro Devices Inc(AMD)Citadel Advisors LLC added; Millennium Management LLC trimmed
  • Alphabet Inc(GOOG)Citadel Advisors LLC added; Millennium Management LLC trimmed
  • Taiwan Semiconductor MFG LTD(TSM)Citadel Advisors LLC trimmed; Millennium Management LLC started
  • 443201108(HWM)Citadel Advisors LLC added; Millennium Management LLC trimmed
  • Mastercard Inc(MA)Citadel Advisors LLC added; Millennium Management LLC trimmed
  • Unitedhealth Group Inc(UNH)Citadel Advisors LLC trimmed; Millennium Management LLC added
  • Coca Cola Co(KO)Citadel Advisors LLC added; Millennium Management LLC trimmed
Citadel Advisors LLC: the recordMillennium Management LLC: the record

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