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ROTHBERG JONATHAN M Discloses 100% Stake in QSI (Schedule 13D) - AlphaYou

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Schedule 13D filing

ROTHBERG JONATHAN M disclosed a 100% stake in Quantum-Si Inc (QSI)

Schedule 13D · Filed Aug 28, 2026

ROTHBERG JONATHAN M reported owning 100% of Quantum-Si Inc (QSI) (19,937,500 shares) in a Schedule 13D filed Aug 28, 2026.

A 13D means the holder may push for changes at the company.

StakeQ

Quantum-Si Inc

Stake

100% stake

Disclosed: Aug 28, 2026
Source: Schedule 13D

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From a public Schedule 13D, linked above. Not investment advice, and not a recommendation to buy or sell.

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