Company · QSI · CIK 1816431

Quantum-Si Inc (QSI) SEC filings and CIK.

QSI’s SEC Central Index Key (CIK) is 0001816431, or 1816431 without leading zeros. The SEC’s ticker file lists it as Quantum-Si Inc.

Ticker: QSI
CIK: 0001816431
Other tickers: None
Insider transactions: None loaded

Recent filings we observed

No filings for this CIK appear in our current observation window. The full history is available from the filings endpoint below and on SEC.gov.

Get QSI SEC data through the API

Filing history

curl "https://sec-api.dev/api/v1/filings?cik=1816431&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Company profile

curl "https://sec-api.dev/api/v1/companies/1816431" \
  -H "Authorization: Bearer $SEC_API_KEY"

Reported XBRL facts

curl "https://sec-api.dev/api/v1/facts/1816431?taxonomy=us-gaap&concept=Revenues&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Ticker to CIK API · SEC filings API · Quantum-Si Inc on SEC.gov

Questions

What is QSI’s CIK number?

QSI’s SEC Central Index Key (CIK) is 0001816431, or 1816431 without leading zeros. The SEC’s ticker file lists it as Quantum-Si Inc.

How do I find Quantum-Si Inc’s 10-K?

Request /api/v1/filings?cik=1816431&form=10-K, or open the company’s EDGAR page and filter by 10-K. Foreign issuers file 20-F or 40-F instead.

We hold no filings or insider data for this company beyond its ticker and CIK, so this page is not submitted to search engines.

Ticker and CIK: SEC company_tickers.json, cached 2026-11-11. Tickers can move between entities; the CIK identifies the filer.

Plain-text version for agents and LLMs: /companies/qsi.md

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