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Livermore
Livermore
ZHEN

Citadel Advisors LLC

SEC CIK
0001423053
Latest filing
Sep 1, 2026

QSI holding history

Quantum-Si Inc in every 13F filed by Citadel Advisors LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

QSI overviewAll 13F holders of QSIFull Q2 2026 holdings

Shares (Q2 2026)
44,335
Value
$39.2K
% of portfolio
<0.1%
Quarters held
18
Since Q2 2021
Holdings of QSI by Citadel Advisors LLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 202644,335$39.2K<0.1%+28,789+185.2%AddedHolders
Q1 202615,546$12.0K<0.1%−2,660,551−99.4%ReducedHolders
Q4 20252,676,097$2.94M<0.1%+2,269,050+557.4%AddedHolders
Q3 2025407,047$573.9K<0.1%−151,260−27.1%ReducedHolders
Q2 2025558,307$1.09M<0.1%+419,809+303.1%AddedHolders
Q1 2025138,498$166.2K<0.1%+138,498NewHolders
Q4 20240$00.0%−79,753−100.0%Sold outHolders
Q3 202479,753$70.4K<0.1%−146,547−64.8%ReducedHolders
Q2 2024226,300$237.6K<0.1%+133,300+143.3%AddedHolders
Q1 202493,000$183.2K<0.1%−32,130−25.7%ReducedHolders
Q4 2023125,130$251.5K<0.1%+125,130NewHolders
Q3 20230$00.0%−107,111−100.0%Sold outHolders
Q2 2023107,111$191.7K<0.1%+76,478+249.7%AddedHolders
Q1 202330,633$53.9K<0.1%−114,151−78.8%ReducedHolders
Q4 2022144,784$265.0K<0.1%−21,346−12.8%ReducedHolders
Q3 2022166,130$457.0K<0.1%−124,015−42.7%ReducedHolders
Q2 2022290,145$673.0K<0.1%+248,460+596.0%AddedHolders
Q1 202241,685$195.0K<0.1%+20,271+94.7%AddedHolders
Q4 202121,414$168.0K<0.1%+21,414NewHolders
Q3 20210$00.0%−867,703−100.0%Sold outHolders
Q2 2021867,703$10.5M<0.1%+867,703NewHolders