QSI Quantum-Si Inc: institutional ownership and insider trading
140 funds reported holding $59.5M of Quantum-Si Inc in their latest 13F filings; in Q2 2026 funds net sold $8.99M, with 26 new positions and 41 funds selling out; over the last 12 months insiders bought $564K and sold $495K on the open market; over its last four quarters it reported revenue of $1.61M and net income of −$98.5M.
QSI revenue and earnings
- Quarter ended Jun 30, 2026: revenue $344K, net income −$23.5M, EPS -0.11
- Quarter ended Mar 31, 2026: revenue $258K, net income −$21.7M, EPS -0.10
- Quarter ended Dec 31, 2025: revenue $451K, net income −$17.6M, EPS -0.07
- Quarter ended Sep 30, 2025: revenue $552K, net income −$35.7M, EPS -0.17
Famous investors holding QSI
- Cathie Wood (ARK Investment Management): $6.34M, 0.0% of the portfolio
- Izzy Englander (Millennium Management): $2.77M, 0.0% of the portfolio
- Renaissance Technologies (Renaissance Technologies): $490K, 0.0% of the portfolio
- Ken Griffin (Citadel Advisors): $295K, 0.0% of the portfolio
Largest institutional holders of QSI
- VANGUARD GROUP INC — $10.6M
- VANGUARD CAPITAL MANAGEMENT LLC — $6.71M
- ARK Investment Management LLC — $6.34M
- BlackRock, Inc. (BLK) — $4.62M
- Amova Asset Management Americas, Inc. — $3.46M
- Sumitomo Mitsui Trust Group, Inc. — $3.44M
- MILLENNIUM MANAGEMENT LLC — $2.77M
- UBS Group AG (UBS) — $2.27M
- JANE STREET GROUP, LLC — $2.15M
- AQR CAPITAL MANAGEMENT LLC — $2.08M
Recent QSI insider trades
- Sep 22, 2026: LaPointe Christian sold 14,516 shares ($11.0K)
- Sep 22, 2026: Keyes Jeffry R. sold 7,665 shares ($5.83K)
- Sep 22, 2026: Hawkins Jeffrey Alan sold 29,852 shares ($22.7K)
- Jun 23, 2026: Hawkins Jeffrey Alan sold 22,621 shares ($21.0K)
5%+ owners
- ROTHBERG JONATHAN M.: 100.0% (Schedule 13D/A, filed Aug 28, 2026)
Who owns the most QSI stock?
The largest institutional holders of Quantum-Si Inc in the latest 13F filings are VANGUARD GROUP INC ($10.6M), VANGUARD CAPITAL MANAGEMENT LLC ($6.71M), ARK Investment Management LLC ($6.34M).
Are insiders buying or selling QSI?
Over the last 12 months insiders bought $564K and sold $495K of Quantum-Si Inc stock on the open market (SEC Form 4).
Which famous investors own QSI?
Cathie Wood, Izzy Englander, Renaissance Technologies, Ken Griffin.
What was QSI's revenue last quarter?
Quantum-Si Inc reported revenue of $344K for the quarter ended June 30, 2026, with net income of −$23.5M.
Which ETFs hold QSI?
1 ETFs and mutual funds hold it among their top 100 positions, including ARKG.