Rule 424(a) preliminary prospectuses
Every prospectus filed under Rule 424(a) since 1994: preliminary prospectuses used before a registration statement is effective.
curl -H "Authorization: Bearer $SECFEED_KEY" \ "https://secfeedapi.com/v1/filings?query=formType:%22424A%22&size=2"
import os, requests
r = requests.get(
"https://secfeedapi.com/v1/filings",
params={'query': 'formType:"424A"', 'size': '2'},
headers={"Authorization": f"Bearer {os.environ['SECFEED_KEY']}"},
)
print(r.json())What is 424A?
424A is the submission type for a prospectus filed under Securities Act Rule 424(a). The rule covers prospectuses used before the effective date of a registration statement that vary from the form in the filed registration statement, such as preliminary or "red herring" prospectuses with updated information.
The type is uncommon today because most changes are made by amending the registration statement itself, so filings are sparse in recent years.
Issuers using a preliminary prospectus that differs from the one in the filed registration statement.
Before the registration statement becomes effective.
Filings per year
Every 424A filing on EDGAR, counted from the SecFeed index. Updated daily.
What is inside
| Section | Contents |
|---|---|
| Preliminary prospectus | Offering terms, often with blanks for price. |
| Red herring legend | Notice that the registration statement is not yet effective. |
Get 424A data with SecFeed
Search the filings with formType:"424A", read any document as text or PDF, and use these APIs for structured data:
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Latest 424A filings
| Company | Form | Filed | |
|---|---|---|---|
| StandardAero, Inc. | 424A | 2025-05-19 | EDGAR ↗ |
| Guardian Pharmacy Services, Inc. | 424A | 2024-09-16 | EDGAR ↗ |
| Focus Impact Acquisition Corp. | 424A | 2021-10-25 | EDGAR ↗ |
| Priority Income Fund, Inc. | 424A | 2021-10-04 | EDGAR ↗ |
| Priority Income Fund, Inc. | 424A | 2021-03-15 | EDGAR ↗ |
| M3-Brigade Acquisition II Corp. | 424A | 2021-03-02 | EDGAR ↗ |
| TCW Special Purpose Acquisition Corp. | 424A | 2021-02-24 | EDGAR ↗ |
| CC Neuberger Principal Holdings III | 424A | 2021-02-01 | EDGAR ↗ |
Use cases
- Track pre-effective offering documents
- Historical IPO and offering research
Related forms
Every 424B4 final prospectus since 1994: the priced IPO and offering prospectus with shares sold, price per share, proceeds and underwriters.
424B3Prospectus updatesEvery 424B3 prospectus since 1994: supplements reflecting substantive changes, resale prospectuses, merger prospectuses and non-traded fund updates.
S-1IPO registrationEvery Form S-1 registration statement and amendment since 1994: IPOs, follow on offerings and resale registrations, with offering terms as JSON.
FAQ
What is a 424A prospectus?
A prospectus filed under Rule 424(a), used before effectiveness when it differs from the version in the registration statement.
Is 424A common today?
No. Most pre-effective changes are made through amendments to the registration statement.
Every 424A filing, one API call away
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