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ISSUER PROFILE · CIK 0001816431 · CUSIP 74765K105

Quantum-Si IncQSI

3 13D/G filings 3 distinct filers 6 insider transactions (365d)

Cross-Reference Snapshot

Activist filings
3
1 SCHEDULE 13D/A · 2 SC
Distinct filers
3
multi-activist cluster
Insiders (365d)
6
0 buys · 6 sales
Latest short DTC
2.46
as of 2026-09-30

13D/G Filings Timeline · 3 total

FiledFormFilerStakeSharesIntent
2026-08-28 SCHEDULE 13D/A ROTHBERG JONATHAN M 100.00% 14,376,415 view →
2022-06-28 SC Foresite Capital Fund IV, L.P. — — view →
2021-06-14 SC Flynn James E — — view →

Form 4 Insider Transactions · last 365d

DateInsiderRoleTypeSharesPriceValue
2026-09-22 Hawkins Jeffrey Alan director, officer Sale 9,709 $0.76 $7K
2026-09-22 Keyes Jeffry R. officer Sale 2,493 $0.76 $2K
2026-09-22 LaPointe Christian officer Sale 4,721 $0.76 $4K
2026-09-21 Hawkins Jeffrey Alan director, officer Sale 20,143 $0.76 $15K
2026-09-21 Keyes Jeffry R. officer Sale 5,172 $0.76 $4K
2026-09-21 LaPointe Christian officer Sale 9,795 $0.76 $7K

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-09-30 11,830,534 2.46 -9.3%
2026-09-15 13,046,142 10.32 -9.7%
2026-08-31 14,444,969 4.78 +1.2%
2026-08-14 14,273,563 4.68 -7.4%
2026-07-31 15,417,732 5.91 +9.1%
2026-07-15 14,129,789 4.24 -18.8%
2026-06-30 17,398,927 2.72 -22.7%
2026-06-15 22,514,122 3.40 -1.3%
2026-05-29 22,808,138 3.25 -1.9%
2026-05-15 23,252,541 3.88 +1.2%
2026-04-30 22,967,445 3.40 +0.1%
2026-04-15 22,939,577 5.57 +3.6%

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