QSI 8-K: SEC filing
Filed with the SEC on · accession 0001816431-26-000072
QSI filed a 8-K (current report) with the SEC on Nov 5, 2026. A report of a major event, filed within four business days: results, deals, leadership changes, bankruptcy and more. The stock moved -9.3% by the first close after the filing.
Summary of the filing
Quantum-Si Incorporated furnished a Form 8-K reporting its financial results for the three and nine months ended September 30, 2026, along with a business update, via a press release and a statement on non-GAAP financial measures.
Key details
How QSI stock reacted
Close before
$1.29
Nov 4, 2026
First close after
-9.30%
$1.17
5 trading days
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Since filing
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Click hereFrequently asked questions
What did QSI file with the SEC on Nov 5, 2026?
QSI filed a 8-K (SEC filing). Quantum-Si Incorporated furnished a Form 8-K reporting its financial results for the three and nine months ended September 30, 2026, along with a business update, via a press release and a statement on non-GAAP financial measures.
How do I read a 8-K?
A report of a major event, filed within four business days: results, deals, leadership changes, bankruptcy and more. The "Item" number tells you the topic (e.g. 2.02 results, 5.02 executive change, 1.01 new agreement, 1.03 bankruptcy). Exhibits (99.1 press release) usually hold the details.
Why are SEC filings important?
Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A 8-K (current report): A report of a major event, filed within four business days: results, deals, leadership changes, bankruptcy and more.
How did QSI stock react to this filing?
QSI closed at $1.29 before the filing and $1.17 on Nov 5, 2026 (-9.30%).
Other QSI SEC filings
- 10-Q · SEC filingNov 5, 2026
- 8-K · Delisting noticeOct 15, 2026
- 8-K · SEC filingOct 8, 2026
- 8-K · SEC filingSep 29, 2026
- 8-K · SEC filingAug 13, 2026
- 10-Q · SEC filingAug 13, 2026
- 8-K · Delisting noticeJul 24, 2026
- 8-K · Material agreementJun 24, 2026
- 8-K · Board changeMay 15, 2026
- 10-Q · SEC filingMay 7, 2026
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