Company · CIK 2102771

# Keystone Acquisition Corp.

| CIK | [2102771](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0002102771) (SEC EDGAR) |
| --- | --- |
| Industry (SIC) | 6770 — Blank Checks |
| Incorporated in | E9 |
| Business address | NY |
| Listed | KEYY (Nasdaq), KEYYU (Nasdaq), KEYYW (Nasdaq) |
| First annual or quarterly report | 2026-08-13 |

## Offerings

 1 registration

| Registration | Label and status | First filed | Last event | Filings |
| --- | --- | --- | --- | --- |
| 333-295539 | SPAC Final prospectus | 2026-05-04 | 2026-06-03 | 4 |

## Filings

 5

| Filed | Filing | Registration | Accession |
| --- | --- | --- | --- |
| 2026-06-03 | [424B4](https://www.sec.gov/Archives/edgar/data/2102771/000121390026064746/0001213900-26-064746-index.htm) Final prospectus | 333-295539 | 0001213900-26-064746 |
| 2026-06-02 | [EFFECT](https://www.sec.gov/Archives/edgar/data/2102771/999999999526001846/9999999995-26-001846-index.htm) Declared effective | 333-295539 | 9999999995-26-001846 |
| 2026-05-28 | [S-1/A](https://www.sec.gov/Archives/edgar/data/2102771/000121390026062203/0001213900-26-062203-index.htm) Amendment | 333-295539 | 0001213900-26-062203 |
| 2026-05-04 | [S-1](https://www.sec.gov/Archives/edgar/data/2102771/000121390026051706/0001213900-26-051706-index.htm) Registration filed | 333-295539 | 0001213900-26-051706 |
| 2026-01-23 | [DRS](https://www.sec.gov/Archives/edgar/data/2102771/000121390026007200/0001213900-26-007200-index.htm) Draft made public | 377-08965 | 0001213900-26-007200 |

[All filings of this company](https://equitycapital.markets/filings?cik=2102771) · [CSV](https://equitycapital.markets/filings.csv?cik=2102771)

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Source page: https://equitycapital.markets/company/2102771 · Data: U.S. SEC EDGAR · CC BY 4.0