DOSSIER · 13F Holders · Q2 2026
QSI
QUANTUM SI INC
140 institutions still hold QUANTUM SI INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.
CUSIP 74765K105·140 13F holders·last filed Jun 30, 2026
AI Holders Summary · Q2 2026
140 institutions reported QSI in Q2 2026. VANGUARD CAPITAL MANAGEMENT LLC leads at 16.6% of the visible book.
Top holders
Sorted by position value. Source: SEC EDGAR 13F-HR filings.
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