QUANTUM SI INC (QSI) is held by institutional investors who disclose positions via SEC 13F filings. View the full list of institutional holders on HoldingsIntel.

Are institutions buying or selling QSI?

HoldingsIntel tracks quarter-over-quarter changes in institutional positions for QUANTUM SI INC, showing new buyers, position increases, decreases, and exits with conviction-weighted sentiment.

What is the Smart Money Verdict on QSI?

The Smart Money Verdict combines four independent signals (institutional 13F activity, insider trades, activist filings, and congressional trades) into a single assessment for QUANTUM SI INC.

Is institutional money flowing into QSI?

84 institutional investors hold QUANTUM SI INC (QSI). View detailed buyer/seller breakdown on HoldingsIntel.

What do hedge funds think about QSI?

Track institutional sentiment and conviction scores for QUANTUM SI INC (QSI) including Smart Money Verdict and position changes on HoldingsIntel.

QUANTUM SI INC

QSI·74765K105·US·Common Stock·Healthcare - Medical Devices-Activist

Holders

Avg rating(9 Elite)

$39M

Total Value

54% (92)

Fund Consensus

43 buying - 37 selling

Smart Money Verdict

View all

46Weak MomentumStrong Convergence

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Held by 84 funds

9 elite

Who's Trading

InsiderUNUnknownSell $83KApr 21, 2026

InsiderUNUnknownSell $37KApr 21, 2026

InsiderHAHawkins Jeffrey AlanSell $84KApr 20, 2026

InsiderKRKeyes Jeffry R.Sell $38KApr 20, 2026

Activist

The Vanguard Group4.8%Oct 30, 2025

ActivistRJROTHBERG JONATHAN M7.8%Sep 11, 2025

View all insider trades View all activist filings

13F: Mar 31, 2026Insider & Congress: Updated regularly

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Increased	13.4M(+2.8%)	$10.4M	0.0%	-65.93%	28
ARK Investment Management LLC	Decreased	6.9M(-2.0%)	$5.3M	0.0%	-88.06%	0
Amova Asset Management Americas, Inc.	Decreased	4.4M(-6.4%)	$3.4M	0.0%	-70.54%	0
Sumitomo Mitsui Trust Group, Inc.	Decreased	4.4M(-6.4%)	$3.4M	0.0%	-49.48%	0
GEODE CAPITAL MANAGEMENT, LLC	Decreased	3.8M(-6.8%)	$3M	0.0%	-70.93%	0
STATE STREET CORP	Increased	3.8M(+5.8%)	$2.9M	0.0%	-49.00%	28
AQR CAPITAL MANAGEMENT LLC	Increased	2.4M(+2659.5%)	$1.9M	0.0%	-11.57%	42
UBS Group AG	Increased	1.7M(+17.5%)	$1.3M	0.0%	-42.81%	30
SUSQUEHANNA INTERNATIONAL GROUP, LLP	Decreased	1.5M(-37.1%)	$1.1M	0.0%	-56.38%	0
NORTHERN TRUST CORP	Decreased	1.3M(-42.9%)	$975,783	0.0%	-63.18%	0
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Decreased	457,571(-2.3%)	$354,160	0.0%	-65.21%	0
Nuveen, LLC	Increased	451,367(+0.9%)	$349,358	0.0%	-49.15%	24
GOLDMAN SACHS GROUP INC	Increased	444,177(+14.8%)	$343,793	0.0%	-63.13%	18
Invesco Ltd.	Increased	406,690(+1.0%)	$314,778	0.0%	-39.62%	16
XTX Topco Ltd	Decreased	389,254(-15.7%)	$301,283	0.0%	-31.49%	0
ALLIANCEBERNSTEIN L.P.	Unchanged	272,180	$299,398	0.0%	-50.88%	0
Bank of New York Mellon Corp	Decreased	383,088(-5.7%)	$296,510	0.0%	-63.32%	0
IEQ CAPITAL, LLC	New	357,688	$276,850	0.0%	-6.32%	32
GROUP ONE TRADING LLC	Increased	283,981(+15.5%)	$219,801	0.0%	-40.81%	26
IMC-Chicago, LLC	New	220,876	$170,958	0.0%	-6.32%	31

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High Conviction Moves-Signal Convergence-Fund Consensus-Double-Down Signals

Data sourced from four SEC data sources: 13F, Form 4, 13D/13G, and STOCK Act. Not financial advice. Full disclaimer