QUANTUM-SI INC (QSI) Institutional Ownership

QSI is currently held by 2 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $5.42M based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026.

The largest disclosed holder is ARK Invest, which reported ownership valued at approximately $5.32M in its March 31, 2026 13F filing. Based on current market prices and the latest disclosed share count, ARK Invest's QSI position is now estimated to be worth approximately $6.50M, representing an estimated gain of +22.00% since the filing period.

Major shareholders tracked on this page include ARK Invest, Renaissance Technologies LLC, and other prominent asset managers. Collectively, these investors account for approximately 100% of the total disclosed value among the investors covered in this analysis.

This page tracks institutional position trends, hedge fund exposure, portfolio concentration, historical 13F filings, and estimated holding performance to help investors analyze smart money sentiment toward QUANTUM-SI INC (QSI).

Institutional Ownership Trend

Portfolio quarterInstitutional holdersTotal reported valueTotal shares
Q1 20262$5,415,5236,996,799
Q4 20251$7,723,7287,021,571
Q3 20251$10,749,8997,624,042
Q2 20252$15,777,8758,049,936
Q1 20252$11,502,3089,585,257
Q4 20242$25,362,7369,393,606
Q3 20242$10,484,21111,884,165
Q2 20241$13,030,42512,409,929
Q1 20241$25,154,68612,768,876
Q4 20231$31,193,83815,519,322
Q3 20231$23,984,04014,448,217
Q2 20232$22,831,01012,977,787

Related QSI Institutional Insights:

QSI Institutional Ownership and 13F Activity Q1 2026 | InsiderSet