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ALLIANCEBERNSTEIN L.P.

Position in QSI — Quantum-Si Inc

CIK 1109448 NASHVILLE, TN

Position in QSI

as of Mar 31, 2026 · filed May 15, 2026
Position Value
$210,667
-$88,731 QoQ
Shares Held
272,180
0.0% QoQ
Ownership
0.125%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Jun 2022
16 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in QSI Over Time

Shares Held

Position Value (USD)

Position in Medical Devices

Healthcare · as of Mar 31, 2026

ALLIANCEBERNSTEIN L.P. holds $5,594,760,047 across 72 Medical Devices names. QSI ranks #54 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in QSI

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16 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $210,667 272,180
2025-12-31 $299,398 272,180
2025-09-30 $383,773 272,180
2025-06-30 $533,472 272,180
2025-03-31 $132,216 110,180
2024-12-31 $205,416 76,080
2024-09-30 $67,102 76,080
2024-06-30 $79,884 76,080
2024-03-31 $108,744 55,200
2023-12-31 $110,952 55,200
2023-09-30 $91,632 55,200
2023-06-30 $81,874 45,740
2023-03-31 $55,440 31,500
2022-12-31 $57,645 31,500
2022-09-30 $54,175 19,700
2022-06-30 $24,360 10,500