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QSI Insider Trading

Insider Ownership Percentage: 30.04%
Insider Buying (Last 12 Months): $213,522.00
Insider Selling (Last 12 Months): $11,727,646.11

Quantum-Si Insider Trading History Chart

This chart shows the insider buying and selling history at Quantum-Si by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

Quantum-Si Share Price & Price History

Current Price: $1.36
Price Change: ▲ Price Increase of +0.22 (19.30%)
As of 03/14/2025 05:00 PM ET

This chart shows the closing price history over time for QSI up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

Quantum-Si Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
12/27/2024Jonathan M RothbergDirectorSell3,506,267$3.34$11,710,931.781,250,000View SEC Filing Icon  
12/23/2024John S VieceliInsiderSell4,306$1.29$5,554.74160,493View SEC Filing Icon  
9/23/2024John S VieceliInsiderSell2,192$0.95$2,082.40166,916View SEC Filing Icon  
8/12/2024Charles R KummethDirectorBuy31,100$0.89$27,679.00355,000View SEC Filing Icon  
8/9/2024Charles R KummethDirectorBuy138,900$0.87$120,843.00323,900View SEC Filing Icon  
8/9/2024Christian LaPointeGeneral CounselBuy25,000$0.86$21,500.00571,710View SEC Filing Icon  
8/9/2024Jeffry R KeyesCFOBuy50,000$0.87$43,500.00446,820View SEC Filing Icon  
6/24/2024Grace JohnstonInsiderSell3,169$1.20$3,802.80295,940View SEC Filing Icon  
6/21/2024Grace JohnstonInsiderSell4,359$1.21$5,274.39299,109View SEC Filing Icon  
3/15/2024Christian LaPointeGeneral CounselBuy10,000$1.74$17,400.00257,693View SEC Filing Icon  
3/14/2024Jeffrey Alan HawkinsCEOBuy25,000$1.76$44,000.0025,000View SEC Filing Icon  
3/5/2024Jeffry R KeyesCFOBuy50,000$1.61$80,500.0050,000View SEC Filing Icon  
3/15/2023Christian LaPointeGeneral CounselBuy20,000$1.77$35,400.00247,693View SEC Filing Icon  
8/17/2022Christian LaPointeGeneral CounselBuy20,000$3.93$78,600.00227,693View SEC Filing Icon  
6/14/2022Jonathan M RothbergCEOBuy25,561$3.10$79,239.102,568,443View SEC Filing Icon  
6/13/2022Matthew DyerInsiderSell1,622$3.22$5,222.84333,393View SEC Filing Icon  
6/13/2022Michael P MckennaEVPSell1,648$3.22$5,306.56869,021View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for Quantum-Si (NASDAQ:QSI)

39.90% of Quantum-Si stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at QSI by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Quantum-Si Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
2/18/2025Alpine Global Management LLC13,785$37K0.0%N/A0.010%Search for SEC Filing on Google Icon
2/17/2025Two Sigma Investments LP152,683$0.41M0.0%N/A0.107%Search for SEC Filing on Google Icon
2/17/2025Shay Capital LLC216,546$0.59M0.1%+56.7%0.152%Search for SEC Filing on Google Icon
2/17/2025ProShare Advisors LLC28,204$76K0.0%+49.0%0.020%Search for SEC Filing on Google Icon
2/17/2025Nuveen Asset Management LLC319,100$0.86M0.0%-43.5%0.224%Search for SEC Filing on Google Icon
2/17/2025Cetera Investment Advisers13,380$36K0.0%N/A0.009%Search for SEC Filing on Google Icon
2/17/2025Centiva Capital LP143,176$0.39M0.0%N/A0.100%Search for SEC Filing on Google Icon
2/17/2025Bridgeway Capital Management LLC296,100$0.80M0.0%-27.2%0.207%Search for SEC Filing on Google Icon
2/17/2025Balyasny Asset Management L.P.13,488$36K0.0%N/A0.009%Search for SEC Filing on Google Icon
2/17/2025Bank of America Corp DE111,871$0.30M0.0%+13.4%0.078%Search for SEC Filing on Google Icon
2/17/2025BNP Paribas Financial Markets19,025$51K0.0%N/A0.013%Search for SEC Filing on Google Icon
2/14/2025Mercer Global Advisors Inc. ADV30,959$84K0.0%N/A0.022%Search for SEC Filing on Google Icon
2/14/2025Northern Trust Corp841,146$2.27M0.0%+5.0%0.589%Search for SEC Filing on Google Icon
2/14/2025The Manufacturers Life Insurance Company 34,850$94K0.0%N/A0.024%Search for SEC Filing on Google Icon
2/14/2025Voya Investment Management LLC30,863$83K0.0%-15.4%0.022%Search for SEC Filing on Google Icon
2/14/2025Price T Rowe Associates Inc. MD109,114$0.30M0.0%+12.1%0.076%Search for SEC Filing on Google Icon
2/14/2025Alpine Global Management LLC13,785$37K0.0%N/A0.010%Search for SEC Filing on Google Icon
2/14/2025Tower Research Capital LLC TRC 23,347$63K0.0%+139.3%0.016%Search for SEC Filing on Google Icon
2/13/2025Jump Financial LLC12,385$33K0.0%N/A0.009%Search for SEC Filing on Google Icon
2/13/2025Guggenheim Capital LLC199,999$0.54M0.0%-17.5%0.140%Search for SEC Filing on Google Icon
2/13/2025XTX Topco Ltd245,585$0.66M0.1%+460.5%0.172%Search for SEC Filing on Google Icon
2/13/2025Mariner LLC33,439$90K0.0%+29.1%0.023%Search for SEC Filing on Google Icon
2/13/2025Barclays PLC150,616$0.41M0.0%-23.5%0.106%Search for SEC Filing on Google Icon
2/13/2025Renaissance Technologies LLC544,956$1.47M0.0%+1,211.4%0.382%Search for SEC Filing on Google Icon
2/13/2025Wells Fargo & Company MN71,980$0.19M0.0%+13.9%0.050%Search for SEC Filing on Google Icon
2/12/2025Thoroughbred Financial Services LLC33,000$89K0.0%N/A0.023%Search for SEC Filing on Google Icon
2/12/2025Geode Capital Management LLC2,368,376$6.40M0.0%+2.2%1.660%Search for SEC Filing on Google Icon
2/12/2025IQ EQ FUND MANAGEMENT IRELAND Ltd33,902$92K0.0%+29.4%0.024%Search for SEC Filing on Google Icon
2/12/2025WINTON GROUP Ltd34,610$93K0.0%N/A0.024%Search for SEC Filing on Google Icon
2/11/2025Dudley Capital Management LLC11,000$30K0.0%N/A0.008%Search for SEC Filing on Google Icon
2/11/2025AXQ Capital LP34,067$92K0.0%N/A0.024%Search for SEC Filing on Google Icon
2/10/2025Nikko Asset Management Americas Inc.5,965,208$16.05M0.2%-20.8%4.180%Search for SEC Filing on Google Icon
2/10/2025Commonwealth Equity Services LLC31,013$84K0.0%+46.7%0.022%Search for SEC Filing on Google Icon
2/6/2025Charles Schwab Investment Management Inc.308,021$0.83M0.0%+32.6%0.216%Search for SEC Filing on Google Icon
2/6/2025Bravias Capital Group LLC20,250$55K0.0%N/A0.014%Search for SEC Filing on Google Icon
2/6/2025SBI Securities Co. Ltd.22,261$60K0.0%N/A0.016%Search for SEC Filing on Google Icon
2/4/2025ARK Investment Management LLC8,848,650$23.89M0.2%-25.3%6.200%Search for SEC Filing on Google Icon
2/4/2025Bank of New York Mellon Corp269,807$0.73M0.0%+21.3%0.189%Search for SEC Filing on Google Icon
2/3/2025Wolverine Asset Management LLC9,632$26K0.0%N/A0.007%Search for SEC Filing on Google Icon
1/31/2025Sanctuary Advisors LLC35,243$95K0.0%N/A0.025%Search for SEC Filing on Google Icon
1/30/2025Rhumbline Advisers148,946$0.40M0.0%+3.7%0.104%Search for SEC Filing on Google Icon
1/28/2025Sumitomo Mitsui Trust Group Inc.5,965,208$16.11M0.0%-21.0%4.180%Search for SEC Filing on Google Icon
1/23/2025Abel Hall LLC10,432$28K0.0%N/A0.007%Search for SEC Filing on Google Icon
1/17/2025SG Americas Securities LLC67,588$0.18M0.0%+12.4%0.047%Search for SEC Filing on Google Icon
1/13/2025Green Alpha Advisors LLC158,858$0.43M0.3%-9.3%0.111%Search for SEC Filing on Google Icon
11/19/2024Barclays PLC196,826$0.17M0.0%+210.5%0.138%Search for SEC Filing on Google Icon
11/16/2024Geode Capital Management LLC2,316,921$2.04M0.0%+6.7%1.627%Search for SEC Filing on Google Icon
11/15/2024Barclays PLC196,826$0.17M0.0%+210.5%0.138%Search for SEC Filing on Google Icon
11/15/2024XTX Topco Ltd43,812$39K0.0%+81.3%0.031%Search for SEC Filing on Google Icon
11/15/2024Jane Street Group LLC256,689$0.23M0.0%-15.6%0.180%Search for SEC Filing on Google Icon
11/15/2024State Street Corp2,269,038$2M0.0%-4.3%1.594%Search for SEC Filing on Google Icon
11/12/2024Charles Schwab Investment Management Inc.232,360$0.21M0.0%-10.8%0.163%Search for SEC Filing on Google Icon
11/5/2024Sumitomo Mitsui Trust Group Inc.7,547,912$6.66M0.0%-4.0%5.302%Search for SEC Filing on Google Icon
11/5/2024GSA Capital Partners LLP112,317$99K0.0%-38.4%0.079%Search for SEC Filing on Google Icon
10/31/2024ARK Investment Management LLC11,842,609$10.45M0.1%-4.6%8.319%Search for SEC Filing on Google Icon
10/7/2024Green Alpha Advisors LLC175,055$0.15M0.1%+35.4%0.123%Search for SEC Filing on Google Icon
10/3/2024SG Americas Securities LLC60,118$53K0.0%N/A0.042%Search for SEC Filing on Google Icon
8/12/2024XTX Topco Ltd24,161$25K0.0%N/A0.017%Search for SEC Filing on Google Icon
7/26/2024ARK Investment Management LLC12,409,929$13.03M0.1%-2.8%8.750%Search for SEC Filing on Google Icon
7/26/2024Bank of New York Mellon Corp322,460$0.34M0.0%+3.5%0.227%Search for SEC Filing on Google Icon
7/19/2024Sumitomo Mitsui Trust Holdings Inc.7,863,161$8.26M0.0%-2.4%5.544%Search for SEC Filing on Google Icon
7/10/2024Neumann Advisory Hong Kong Ltd33,803$35K0.0%-79.7%0.024%Search for SEC Filing on Google Icon
5/20/2024Virtu Financial LLC49,988$98K0.0%N/A0.035%Search for SEC Filing on Google Icon
5/16/2024Jacobs Levy Equity Management Inc.506,697$1M0.0%N/A0.357%Search for SEC Filing on Google Icon
5/15/2024Public Employees Retirement System of Ohio13,800$27K0.0%N/A0.010%Search for SEC Filing on Google Icon
5/15/2024Price T Rowe Associates Inc. MD59,727$0.12M0.0%+11.1%0.042%Search for SEC Filing on Google Icon
5/10/2024Vanguard Group Inc.5,300,685$10.44M0.0%+1.6%3.739%Search for SEC Filing on Google Icon
5/8/2024Bleakley Financial Group LLC14,090$28K0.0%N/A0.010%Search for SEC Filing on Google Icon
5/3/2024Nikko Asset Management Americas Inc.8,054,503$15.71M0.2%-5.6%5.681%Search for SEC Filing on Google Icon
4/24/2024Simplicity Wealth LLC14,090$28K0.0%N/A0.010%Search for SEC Filing on Google Icon
4/19/2024Sumitomo Mitsui Trust Holdings Inc.8,054,503$15.87M0.0%-5.6%5.681%Search for SEC Filing on Google Icon
2/14/2024TIG Advisors LLC82,577$0.17M0.0%N/A0.058%Search for SEC Filing on Google Icon
2/13/2024General American Investors Co. Inc.294,350$0.59M0.0%+146.8%0.208%Search for SEC Filing on Google Icon
1/30/2024Cookson Peirce & Co. Inc.50,000$0.10M0.0%N/A0.035%Search for SEC Filing on Google Icon
1/29/2024Round Rock Advisors LLC13,935$28K0.0%-36.3%0.010%Search for SEC Filing on Google Icon
1/17/2024ARK Investment Management LLC15,519,322$31.19M0.2%+7.4%10.950%Search for SEC Filing on Google Icon
1/12/2024SG Americas Securities LLC17,341$35K0.0%-62.8%0.012%Search for SEC Filing on Google Icon
1/5/2024Green Alpha Advisors LLC131,785$0.27M0.2%+209.2%0.093%Search for SEC Filing on Google Icon
11/14/2023Knollwood Investment Advisory LLC300,000$0.50M0.2%N/A0.212%Search for SEC Filing on Google Icon
11/13/2023WINTON GROUP Ltd62,058$0.10M0.0%N/A0.044%Search for SEC Filing on Google Icon
11/8/2023State Board of Administration of Florida Retirement System35,636$59K0.0%N/A0.025%Search for SEC Filing on Google Icon
11/8/2023Pathstone Family Office LLC26,039$43K0.0%N/A0.018%Search for SEC Filing on Google Icon
10/30/2023Sumitomo Mitsui Trust Holdings Inc.8,532,917$14.17M0.0%+424.5%6.021%Search for SEC Filing on Google Icon
10/24/2023Bank of New York Mellon Corp346,956$0.58M0.0%-2.5%0.245%Search for SEC Filing on Google Icon
10/23/2023Commonwealth Equity Services LLC16,774$28K0.0%N/A0.012%Search for SEC Filing on Google Icon
10/18/2023ARK Investment Management LLC14,448,217$23.98M0.2%+13.3%10.195%Search for SEC Filing on Google Icon
10/13/2023SG Americas Securities LLC46,566$77K0.0%N/A0.033%Search for SEC Filing on Google Icon
10/12/2023Neumann Advisory Hong Kong Ltd166,198$0.28M0.1%-13.8%0.117%Search for SEC Filing on Google Icon
10/10/2023Green Alpha Advisors LLC42,622$71K0.1%N/A0.030%Search for SEC Filing on Google Icon
9/21/2023Barclays PLC49,777$89K0.0%-34.6%0.035%Search for SEC Filing on Google Icon
8/14/2023Shay Capital LLC83,698$0.15M0.0%N/A0.059%Search for SEC Filing on Google Icon
8/11/2023Guggenheim Capital LLC709,035$1.27M0.0%+14.9%0.501%Search for SEC Filing on Google Icon
8/7/2023Principal Financial Group Inc.41,696$75K0.0%+32.2%0.029%Search for SEC Filing on Google Icon
8/4/2023American International Group Inc.48,349$87K0.0%+9.7%0.034%Search for SEC Filing on Google Icon
7/31/2023Sumitomo Mitsui Trust Holdings Inc.1,626,985$2.91M0.0%+44.7%1.150%Search for SEC Filing on Google Icon
7/10/2023ARK Investment Management LLC12,754,531$22.83M0.2%+9.0%9.014%Search for SEC Filing on Google Icon
6/1/2023Prelude Capital Management LLC19,347$34K0.0%+59.4%0.014%Search for SEC Filing on Google Icon
5/16/2023Glenview Capital Management LLC4,215,990$7.42M0.2%-0.8%3.013%Search for SEC Filing on Google Icon
5/15/2023Security Benefit Life Insurance Co. KS715,479$1.26M0.1%-82.8%0.511%Search for SEC Filing on Google Icon
5/10/2023Connor Clark & Lunn Investment Management Ltd.23,999$42K0.0%N/A0.017%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
Quantum-Si logo
Quantum-Si incorporated, a life sciences company, engages in the development of single-molecule detection platform to enable Next Generation Protein Sequencing (NGPS). The company's platform is comprised of the Platinum NGPS instrument; the Platinum Analysis Software service; and reagent kits and semiconductor chips for use with its instruments. It is used in protein identification, protein variants, antibody characterization, biomarker identification, and post translational modification analysis applications. The company was founded in 2013 is headquartered in Branford, Connecticut.
Read More on Quantum-Si

Today's Range

Now: $1.36
Low: $1.18
High: $1.37

50 Day Range

MA: $1.95
Low: $1.14
High: $4.10

52 Week Range

Now: $1.36
Low: $0.61
High: $5.77

Volume

18,675,283 shs

Average Volume

9,153,736 shs

Market Capitalization

$249.07 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

2.75

Who are the company insiders with the largest holdings of Quantum-Si?

Quantum-Si's top insider investors include:
  1. Jonathan M Rothberg (Director)
  2. Christian Lapointe (General Counsel)
  3. Jeffry R Keyes (CFO)
  4. Charles R Kummeth (Director)
  5. Grace Johnston (Insider)
  6. John S Vieceli (Insider)
  7. Jeffrey Alan Hawkins (CEO)
Learn More about top insider investors at Quantum-Si.

Who are the major institutional investors of Quantum-Si?

Quantum-Si's top institutional investors include:
  1. ARK Investment Management LLC — 6.20%
  2. Sumitomo Mitsui Trust Group Inc. — 4.18%
  3. Nikko Asset Management Americas Inc. — 4.18%
  4. Geode Capital Management LLC — 1.66%
  5. Northern Trust Corp — 0.59%
  6. Renaissance Technologies LLC — 0.38%
Learn More about top institutional investors of Quantum-Si stock.

Which major investors are selling Quantum-Si stock?

In the last quarter, QSI stock was sold by these institutional investors:
  1. ARK Investment Management LLC
  2. Sumitomo Mitsui Trust Group Inc.
  3. Nikko Asset Management Americas Inc.
  4. Nuveen Asset Management LLC
  5. Bridgeway Capital Management LLC
  6. Barclays PLC
  7. Guggenheim Capital LLC
  8. Green Alpha Advisors LLC
In the last year, company insiders that have sold Quantum-Si company stock include:
  1. Jonathan M Rothberg (Director)
  2. Christian Lapointe (General Counsel)
  3. Jeffry R Keyes (CFO)
Learn More investors selling Quantum-Si stock.

Which major investors are buying Quantum-Si stock?

During the previous quarter, QSI stock was acquired by institutional investors including:
  1. Renaissance Technologies LLC
  2. Citadel Advisors LLC
  3. XTX Topco Ltd
  4. Susquehanna International Group LLP
  5. Two Sigma Investments LP
  6. Centiva Capital LP
  7. Simplex Trading LLC
  8. Group One Trading LLC
During the previous year, these company insiders have bought Quantum-Si stock:
  1. Jonathan M Rothberg (Director)
  2. Christian Lapointe (General Counsel)
  3. Jeffry R Keyes (CFO)
  4. Charles R Kummeth (Director)
Learn More investors buying Quantum-Si stock.