How many shares of QSI does ALLIANCEBERNSTEIN L.P. own?

As of 2026-Q1, ALLIANCEBERNSTEIN L.P. holds 272,180 shares of QSI (QUANTUM SI INC).

What is ALLIANCEBERNSTEIN L.P.'s QSI position worth?

As of 2026-Q1, ALLIANCEBERNSTEIN L.P.'s QSI position is worth $299,398.

Based on available 13F filings, ALLIANCEBERNSTEIN L.P. first reported a position in QSI in 2024-Q2. They have held the position across 16 quarters.

Position history for ALLIANCEBERNSTEIN L.P.'s holdings in QUANTUM SI INC

Current Value

$299,398

Current Shares

272,180

Total Value Change

+$219,514

Total Shares Change

+196,100

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q1 Latest	Unchanged	272,180	0.0%	$299,398	0.0%	$0.95	0
2025-Q4	Unchanged	272,180	0.0%	$299,398	0.0%	$1.11	0
2025-Q3	Unchanged	272,180	0.0%	$383,774	0.0%	$1.39	0
2025-Q2	Increased	272,180	+147.0%	$533,473	0.0%	$1.95	39
2025-Q1	Increased	110,180	+44.8%	$132,216	0.0%	$1.27	20
2024-Q4	Unchanged	76,080	0.0%	$205,416	0.0%	$3.33	0
2024-Q3	Unchanged	76,080	0.0%	$67,118	0.0%	$0.91	0
2024-Q2	Increased	76,080	+37.8%	$79,884	0.0%	$1.05	19