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ISSUER PROFILE · CIK 0001816431

Quantum-Si IncQSI

3 13D/G filings 3 distinct filers 0 insider transactions (365d)

Cross-Reference Snapshot

Activist filings
3
1 SCHEDULE 13D/A · 2 SC
Distinct filers
3
multi-activist cluster
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
4.68
as of 2026-08-14

13D/G Filings Timeline · 3 total

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

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
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%
2026-03-31 22,143,189 7.21 +2.9%
2026-03-13 21,512,748 5.19 +1.8%
2026-02-27 21,136,226 8.03 -1.0%

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