Back to 13F data
Unclassified

Quantum-Si Inc

Quantum-Si Inc is tracked here as a normalized 13F company record; no curated business description is available yet.

Original CUSIPs: 74765K105. This page shows current managers, quarterly changes, and primary SEC sources.

Current managers
1
Latest reporting quarter
Q1 2026

Who holds it and what changed this quarter

Portfolio weight and share-count changes are shown for every tracked manager with a current or prior-quarter position.

ARK Invest
Cathie Wood
Q1 2026
Reduced
0.05% 0.04%

ARK Invest sold 142,672 shares; portfolio weight moved from 0.05% to 0.04%.

-142,672 Shares
-2.03%
SEC05/12/2026

Four-quarter trend

Each line is one tracked manager’s portfolio weight. Labels identify the manager directly.

Historical and source details

Market values, quarterly totals, and original CUSIP rows are available below without obscuring current actions.

Quarterly holdings details
QuarterCurrent managersCombined valueTotal sharesManager details
Q2 20251$15,603,0437,960,736
ARK Invest New position · 7,960,736 Shares
Q3 20251$10,749,8997,624,042
ARK Invest Reduced · 7,624,042 Shares
Q4 20251$7,723,7287,021,571
ARK Invest Reduced · 7,021,571 Shares
Q1 20261$5,324,2686,878,899
ARK Invest Reduced · 6,878,899 Shares
Original CUSIP details
ManagerIssuerCUSIPSecurity classMarket valueSharesWeightSource
ARK InvestQuantum-Si Inc74765K105Common Stock$5,324,2686,878,8990.04%SEC XML