QUANTUM-SI INC (QSI) Institutional Ownership and Insiders Activity

QUANTUM-SI INC (QSI) is widely held by institutional investors, with 2 tracked firms reporting positions valued at approximately $5.42M based on SEC Form 13F filings for the quarter ended March 31, 2026.

ARK Invest is the largest disclosed holder, reporting approximately $5.32M in QSI holdings in its latest filing.

Institutional ownership among tracked investors remains highly concentrated, with ARK Invest representing the majority of disclosed value.