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Quantum-Si (QSI) Institutional Ownership

Quantum-Si logo
$1.55 +0.12 (+8.39%)
Closing price 10/2/2026 04:00 PM Eastern
Extended Trading
$1.50 -0.05 (-3.55%)
As of 10/2/2026 07:58 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Quantum-Si (NASDAQ:QSI)

Current
Institutional Ownership
Percentage
39.90%
Number of
Institutional Buyers
(last 12 months)
38
Total
Institutional Inflows
(last 12 months)
$4.88M
Number of
Institutional Sellers
(last 12 months)
15
Total
Institutional Outflows
(last 12 months)
$11.81M
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QSI Institutional Buying and Selling by Quarter

Quantum-Si Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
9/22/2026State Street Corp890,741$788K0.0%-76.4%0.407%
9/9/2026IPG Investment Advisors LLC30,864$27K0.0%N/A0.014%
9/9/2026WINTON GROUP Ltd75,800$67K0.0%N/A0.035%
8/27/2026Corient Private Wealth LP38,328$34K0.0%N/A0.018%
8/11/2026Green Alpha Advisors LLC45,921$41K0.0%N/A0.021%
5/19/2026Bank of America Corp DE161,987$125K0.0%-37.3%0.074%
5/14/2026Renaissance Technologies LLC117,900$91K0.0%N/A0.054%
5/8/2026Amova Asset Management Americas Inc.4,391,666$3.43M0.0%-6.4%2.030%
5/7/2026Hollencrest Capital Management40,111$31K0.0%+301.1%0.019%
5/5/2026Bank of New York Mellon Corp383,088$297K0.0%-5.7%0.177%
4/30/2026Sumitomo Mitsui Trust Group Inc.4,391,666$3.40M0.0%-6.4%2.030%
3/3/2026Caitong International Asset Management Co. Ltd37,964$42K0.0%-36.5%0.018%
2/23/2026Virtu Financial LLC238,379$262K0.0%N/A0.111%
2/19/2026Invesco Ltd.402,821$443K0.0%+36.2%0.187%
2/18/2026XTX Topco Ltd461,982$508K0.0%+206.9%0.214%
2/18/2026Quadrature Capital Ltd276,889$305K0.0%N/A0.128%
2/18/2026Millennium Management LLC191,791$211K0.0%-92.8%0.089%
2/16/2026Barclays PLC269,415$296K0.0%+21.8%0.125%
2/13/2026State Street Corp3,562,721$3.92M0.0%+26.5%1.653%
2/13/2026Caitong International Asset Management Co. Ltd25,194$28K0.1%-57.9%0.012%
2/13/2026Wells Fargo & Company MN176,132$194K0.0%+29.6%0.082%
2/12/2026HRT Financial LP104,292$114K0.0%N/A0.048%
2/12/2026MetLife Investment Management LLC34,222$38K0.0%-47.0%0.016%
2/12/2026State Board of Administration of Florida Retirement System41,282$45K0.0%N/A0.019%
2/12/2026Dimensional Fund Advisors LP31,320$34K0.0%N/A0.015%
2/12/2026IQ EQ FUND MANAGEMENT IRELAND Ltd253,895$279K0.0%+34.2%0.118%
2/11/2026ARK Investment Management LLC7,021,571$7.72M0.1%-7.9%3.258%
2/11/2026Amova Asset Management Americas Inc.4,690,720$5.11M0.1%-10.1%2.177%
2/11/2026Los Angeles Capital Management LLC93,010$102K0.0%N/A0.043%
2/9/2026Geode Capital Management LLC4,114,375$4.53M0.0%+9.8%1.909%
2/6/2026Leonteq Securities AG25,000$28K0.0%N/A0.012%
1/29/2026Verdence Capital Advisors LLC187,805$207K0.0%+14.6%0.087%
1/29/2026China Universal Asset Management Co. Ltd.31,865$35K0.0%N/A0.015%
1/23/2026Curbstone Financial Management Corp24,000$26K0.0%N/A0.011%
1/23/2026Sumitomo Mitsui Trust Group Inc.4,690,720$5.16M0.0%-10.1%2.177%
1/9/2026SG Americas Securities LLC29,106$32K0.0%-30.9%0.014%
1/7/2026Green Alpha Advisors LLC51,528$57K0.1%-76.1%0.024%
11/19/2025Caitong International Asset Management Co. Ltd59,774$84K0.1%N/A0.028%
11/17/2025Millennium Management LLC2,669,959$3.77M0.0%-29.4%1.239%
11/17/2025Bank of America Corp DE348,007$491K0.0%-25.3%0.161%
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11/14/2025Shay Capital LLC154,572$218K0.0%+19.2%0.076%
11/14/2025Two Sigma Investments LP515,852$727K0.0%-8.6%0.255%
11/14/2025Bridgeway Capital Management LLC261,100$368K0.0%+33.1%0.129%
11/14/2025Squarepoint Ops LLC613,475$865K0.0%N/A0.303%
11/13/2025UBS Group AG504,859$712K0.0%-36.1%0.249%
11/13/2025BNP Paribas Financial Markets30,464$43K0.0%+101.3%0.015%
11/12/2025Amova Asset Management Americas Inc.5,217,499$7.36M0.1%-7.2%2.577%
11/12/2025ARK Investment Management LLC7,624,042$10.75M0.1%-4.2%3.765%
11/12/2025Intech Investment Management LLC74,761$105K0.0%-15.5%0.037%
11/7/2025Vanguard Group Inc.8,714,507$12.29M0.0%+0.5%4.304%
11/6/2025Rhumbline Advisers219,965$310K0.0%+7.8%0.109%
11/5/2025IQ EQ FUND MANAGEMENT IRELAND Ltd189,174$267K0.0%+61.9%0.093%
11/5/2025Capital Investment Advisory Services LLC20,000$28K0.0%+100.0%0.010%
11/5/2025SBI Securities Co. Ltd.33,616$47K0.0%+28.6%0.017%
11/4/2025Jones Financial Companies Lllp93,500$139K0.0%+99.4%0.046%
11/3/2025Hollencrest Capital Management35,000$49K0.0%+40.0%0.017%
10/29/2025Verdence Capital Advisors LLC163,830$231K0.0%N/A0.081%
10/27/2025Sumitomo Mitsui Trust Group Inc.5,217,499$7.36M0.0%-7.2%2.577%
10/23/2025SG Americas Securities LLC42,107$59K0.0%+30.8%0.021%
10/23/2025JTC Employer Solutions Trustee Ltd34,540$49K0.0%+158.9%0.017%
10/21/2025Wealth Management Associates Inc.30,950$44K0.0%+14.8%0.015%
10/16/2025Elite Life Management LLC20,611$29K0.1%N/A0.010%
10/16/2025HBK Sorce Advisory LLC21,428$30K0.0%N/A0.011%
10/15/2025Green Alpha Advisors LLC216,032$305K0.3%-5.4%0.107%
10/14/2025HBK Sorce Advisory LLC21,428$30K0.0%N/A0.011%
10/9/2025Voya Investment Management LLC27,246$38K0.0%-29.9%0.013%
8/16/2025Nikko Asset Management Americas Inc.5,621,303$11.02M0.1%-3.3%3.063%
8/15/2025Bank of America Corp DE465,999$913K0.0%+426.6%0.254%
8/15/2025Ameriprise Financial Inc.223,100$437K0.0%N/A0.122%
8/14/2025The Manufacturers Life Insurance Company 49,082$96K0.0%+27.4%0.027%
8/14/2025Cerity Partners LLC14,881$29K0.0%N/A0.008%
8/13/2025Invesco Ltd.195,450$383K0.0%+88.6%0.107%
8/12/2025XTX Topco Ltd46,474$91K0.0%-87.4%0.025%
8/12/2025Jefferies Financial Group Inc.20,000$39K0.0%-71.7%0.011%
8/12/2025Prudential Financial Inc.12,850$25K0.0%N/A0.007%
8/12/2025Rhumbline Advisers203,967$400K0.0%+36.0%0.111%
8/12/2025JPMorgan Chase & Co.66,656$131K0.0%+15.6%0.036%
8/8/2025Kingsview Wealth Management LLC20,012$39K0.0%+99.9%0.011%
8/8/2025Intech Investment Management LLC88,497$173K0.0%+44.2%0.048%
8/8/2025Geode Capital Management LLC3,447,738$6.76M0.0%+15.1%1.879%
8/4/2025Wolverine Asset Management LLC16,501$32K0.0%+140.0%0.009%
8/1/2025IQ EQ FUND MANAGEMENT IRELAND Ltd116,828$229K0.0%+67.0%0.064%
8/1/2025Green Alpha Advisors LLC228,348$448K0.4%-6.4%0.124%
7/31/2025Sumitomo Mitsui Trust Group Inc.5,621,303$11.02M0.0%-3.3%3.063%
7/30/2025ARK Investment Management LLC7,960,736$15.60M0.1%-8.6%4.338%
7/29/2025JTC Employer Solutions Trustee Ltd13,340$26K0.0%N/A0.007%
7/18/2025EWA LLC68,200$134K0.0%-13.3%0.037%
6/27/2025Goldman Sachs Group Inc.441,314$530K0.0%-56.0%0.240%
5/28/2025Wealth Management Associates Inc.26,950$32K0.0%-23.1%0.015%
5/16/2025Goldman Sachs Group Inc.441,314$530K0.0%-56.0%0.241%
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5/16/2025Millennium Management LLC3,934,285$4.72M0.0%N/A2.148%
5/16/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.70,552$85K0.0%+23.8%0.039%
5/14/2025Corebridge Financial Inc.58,876$71K0.0%+18.2%0.032%
5/14/2025MetLife Investment Management LLC76,015$91K0.0%N/A0.042%
5/13/2025Russell Investments Group Ltd.38,257$46K0.0%+322.6%0.021%
5/12/2025Nuveen LLC319,100$383K0.0%N/A0.174%
5/12/2025Virtu Financial LLC34,830$42K0.0%N/A0.019%
5/12/2025Invesco Ltd.103,657$124K0.0%+177.7%0.057%
5/9/2025Deutsche Bank AG67,522$81K0.0%+107.4%0.037%
5/9/2025Charles Schwab Investment Management Inc.367,444$441K0.0%+19.3%0.201%


QSI Institutional Ownership - Frequently Asked Questions

During the previous two years, 91 institutional investors and hedge funds held shares of Quantum-Si. The most heavily invested institutionals were Vanguard Group Inc. ($12.29M), Nikko Asset Management Americas Inc. ($11.02M), ARK Investment Management LLC ($7.72M), Geode Capital Management LLC ($4.53M), Amova Asset Management Americas Inc. ($3.43M), Sumitomo Mitsui Trust Group Inc. ($3.40M), and Northern Trust Corp ($2.27M).Learn more on Quantum-Si's institutional investors.

39.90% of Quantum-Si's stock is owned by institutional investors. Learn more on QSI's institutional investor holdings.

Of the 79 institutional investors that purchased Quantum-Si's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Millennium Management LLC ($3.93M), Geode Capital Management LLC ($1.02M), State Street Corp ($745.23K), XTX Topco Ltd ($656.26K), Renaissance Technologies LLC ($621.30K), Squarepoint Ops LLC ($613.48K), and Bank of America Corp DE ($390.69K).

Institutional investors have bought a total of 4,161,233 shares in the last 24 months. This purchase volume represents approximately $4.88M in transactions.

Of the 15 institutional investors that sold Quantum-Si's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Millennium Management LLC ($3.59M), State Street Corp ($2.88M), Sumitomo Mitsui Trust Group Inc. ($1.23M), Amova Asset Management Americas Inc. ($1.23M), ARK Investment Management LLC ($939.17K), UBS Group AG ($284.71K), and Bank of America Corp DE ($214.45K).

Institutional investors have sold a total of 10,738,719 shares in the last 24 months. This volume of shares sold represents approximately $11.81M in transactions.


Related Companies

Institutional ownership data for NASDAQ:QSI is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 9/22/2026. New 13F filings are added each quarter as they're published.
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