Company · CIK 1816431

# Quantum-Si Inc

| CIK | [1816431](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001816431) (SEC EDGAR) |
| --- | --- |
| Industry (SIC) | 3829 — Measuring & Controlling Devices, NEC |
| Incorporated in | DE |
| Business address | CT |
| Listed | QSI (Nasdaq) |
| First annual or quarterly report | 2020-11-13 |

## Offerings

 4 registrations

| Registration | Label and status | First filed | Last event | Filings |
| --- | --- | --- | --- | --- |
| 333-290559 | Shelf Dormant | 2025-09-26 | 2025-09-26 | 1 |
| 333-273934 | Shelf Effective | 2023-08-11 | 2025-07-07 | 6 |
| 333-257676 | Registered company Effective | 2021-07-02 | 2022-07-18 | 5 |
| 333-240283 | IPO Final prospectus | 2020-08-03 | 2020-09-04 | 5 |

## Filings

 19

| Filed | Filing | Registration | Accession |
| --- | --- | --- | --- |
| 2025-09-26 | [S-3](https://www.sec.gov/Archives/edgar/data/1816431/000114036125036334/0001140361-25-036334-index.htm) Shelf registered | 333-290559 | 0001140361-25-036334 |
| 2025-07-07 | [424B5](https://www.sec.gov/Archives/edgar/data/1816431/000114036125025058/0001140361-25-025058-index.htm) Shelf takedown | 333-273934 | 0001140361-25-025058 |
| 2025-07-07 | [424B5](https://www.sec.gov/Archives/edgar/data/1816431/000114036125025057/0001140361-25-025057-index.htm) Shelf takedown | 333-273934 | 0001140361-25-025057 |
| 2025-01-06 | [424B5](https://www.sec.gov/Archives/edgar/data/1816431/000114036125000294/0001140361-25-000294-index.htm) Shelf takedown | 333-273934 | 0001140361-25-000294 |
| 2024-12-11 | [424B5](https://www.sec.gov/Archives/edgar/data/1816431/000114036124048975/0001140361-24-048975-index.htm) Shelf takedown | 333-273934 | 0001140361-24-048975 |
| 2023-08-22 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1816431/999999999523002469/9999999995-23-002469-index.htm) Declared effective | 333-273934 | 9999999995-23-002469 |
| 2023-08-11 | [S-3](https://www.sec.gov/Archives/edgar/data/1816431/000114036123039290/0001140361-23-039290-index.htm) Shelf registered | 333-273934 | 0001140361-23-039290 |
| 2022-07-18 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1816431/999999999522002096/9999999995-22-002096-index.htm) Declared effective | 333-257676 | 9999999995-22-002096 |
| 2022-03-03 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1816431/999999999522000549/9999999995-22-000549-index.htm) Declared effective | 333-257676 | 9999999995-22-000549 |
| 2021-07-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1816431/999999999521002869/9999999995-21-002869-index.htm) Declared effective | 333-257676 | 9999999995-21-002869 |
| 2021-07-19 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1816431/000110465921093440/0001104659-21-093440-index.htm) Amendment | 333-257676 | 0001104659-21-093440 |
| 2021-07-02 | [S-1](https://www.sec.gov/Archives/edgar/data/1816431/000110465921088952/0001104659-21-088952-index.htm) Registration filed | 333-257676 | 0001104659-21-088952 |
| 2021-05-14 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1816431/999999999521001942/9999999995-21-001942-index.htm) Declared effective | 333-253691 | 9999999995-21-001942 |
| 2020-09-04 | [424B4](https://www.sec.gov/Archives/edgar/data/1816431/000110465920102606/0001104659-20-102606-index.htm) Final prospectus | 333-240283 | 0001104659-20-102606 |
| 2020-09-03 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1816431/999999999520002354/9999999995-20-002354-index.htm) Declared effective | 333-240283 | 9999999995-20-002354 |
| 2020-08-31 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1816431/000110465920100340/0001104659-20-100340-index.htm) Amendment | 333-240283 | 0001104659-20-100340 |
| 2020-08-10 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1816431/000110465920092698/0001104659-20-092698-index.htm) Amendment | 333-240283 | 0001104659-20-092698 |
| 2020-08-03 | [S-1](https://www.sec.gov/Archives/edgar/data/1816431/000110465920089244/0001104659-20-089244-index.htm) Registration filed | 333-240283 | 0001104659-20-089244 |
| 2020-07-02 | [DRS](https://www.sec.gov/Archives/edgar/data/1816431/000110465920080509/0001104659-20-080509-index.htm) Draft made public | 377-03266 | 0001104659-20-080509 |

[All filings of this company](https://equitycapital.markets/filings?cik=1816431) · [CSV](https://equitycapital.markets/filings.csv?cik=1816431)

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Source page: https://equitycapital.markets/company/1816431 · Data: U.S. SEC EDGAR · CC BY 4.0