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NASDAQ: QSI
Quantum Si Inc Stock Ownership - Who owns Quantum Si?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Quantum Si Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Jeffry R. KeyesChief Financial Officer2025-03-218,626$1.39
$11.95kSell
Jeffrey Alan HawkinsPresident CEO2025-03-2123,707$1.39
$32.83kSell
John S. VieceliChief Product Officer2025-03-214,317$1.39
$5.98kSell
Christian LapointeGeneral Counsel Corp. Secr.2025-03-214,896$1.39
$6.78kSell
Jonathan M. RothbergDirector2024-12-2742,313$4.10
$173.31kSell
Jonathan M. RothbergDirector2024-12-27834,253$3.30
$2.76MSell
Jonathan M. RothbergDirector2024-12-27834,254$3.30
$2.76MSell
Jonathan M. RothbergDirector2024-12-2742,313$4.10
$173.31kSell
Jonathan M. RothbergDirector2024-12-27834,254$3.30
$2.76MSell
Jonathan M. RothbergDirector2024-12-2742,313$4.10
$173.31kSell

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Net Insider Buy/Sell (L12M) Ownership

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QSI Shareholders

What type of owners hold Quantum Si Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Jonathan M. Rothberg26.25%48,067,448$55.28MInsider
4c Holdings I LLC9.80%17,943,750$20.64MInsider
2012 Jmr Trust Common LLC6.81%12,480,108$14.35MInsider
Ark Investment Management LLC4.83%8,848,650$10.18MInstitution
Blackrock Inc4.61%8,437,647$9.70MInstitution
James B. Tananbaum4.60%8,424,317$9.69MInsider
Sumitomo Mitsui Trust Group Inc3.26%5,965,208$6.86MInstitution
Nikko Asset Management Americas Inc3.26%5,965,208$6.86MInstitution
Vanguard Group Inc3.00%5,491,753$6.32MInstitution
Morgan Stanley1.90%3,480,468$4.00MInstitution

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QSI vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
QSI29.27%54.57%Net SellingNet Selling
PLX3.18%96.82%
OCGN24.48%10.45%Net Selling
ENGN68.52%31.48%Net Buying
DSGN45.50%54.50%Net Selling
View Top Biotech Stocks

Quantum Si Stock Ownership FAQ

Who owns Quantum Si?

Quantum Si (NASDAQ: QSI) is owned by 29.27% institutional shareholders, 54.57% Quantum Si insiders, and 16.15% retail investors. Jonathan M. Rothberg is the largest individual Quantum Si shareholder, owning 48.07M shares representing 26.25% of the company. Jonathan M. Rothberg's Quantum Si shares are currently valued at $52.39M.

If you're new to stock investing, here's how to buy Quantum Si stock.
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