Form 424B1 Filings
SEC Form 424B1 is a prospectus filing made under Rule 424(b)(1) of the Securities Act of 1933, used to file a final prospectus (or complete prospectus) in connection with a registered securities offering.
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| ID | Form | Filer Name | Filing Agent | Date | Actions |
|---|---|---|---|---|---|
| 21798662 | 424B1 | Milestone Scientific Inc. | M2 Compliance Llc /fa | 06/09/2026 | |
| 21744246 | 424B1 | Appalachian Power Co | Donnelley Financial Solutions /fa/ | 05/21/2026 | |
| 22893058 | 424B1 | Appalachian Power Co | Self | 05/21/2026 | |
| 21600783 | 424B1 | Cantor Fitzgerald Income Trust, Inc. | Donnelley Financial Solutions /fa/ | 04/01/2026 |
What Is SEC Form 424B1?
SEC Form 424B1 is filed pursuant to Rule 424(b)(1) to submit a form of prospectus that includes information previously omitted from an effective registration statement’s prospectus in reliance on Rule 430A, such as final pricing and underwriting terms.
This form is commonly used in registered public offerings when key offering details are determined after the registration statement is declared effective, and the issuer must file the completed prospectus used for investor delivery as part of the offering process.
Form 424B1 supports transparency by ensuring the market has access to the final prospectus used in the transaction and by tying the completed disclosure to the applicable registration statement and EDGAR filing history through the SEC’s EDGAR system, including filings such as a Filed Pursuant to Rule 424(b)(1) prospectus.
Key elements typically found in SEC Form 424B1 include:
- Name of the registrant and offering parties
- Registration statement file number
- Offering price and underwriting discounts/commissions
- Final terms of the securities being offered
- Use of proceeds and distribution plan (as applicable)
- Updated risk factors or offering-specific disclosures (if included in the final prospectus)
SEC Form 424B1 Filing Deadlines
SEC Form 424B1 timing is driven by Rule 424(b) requirements and depends on when final pricing or first use occurs. These deadlines are important to ensure proper prospectus filing and public availability of the final disclosure used in the offering.
| Filing Stage | Timeline | Details |
| Offering Terms Finalized | As needed | Final pricing and underwriting terms are determined following effectiveness |
| Form 424B1 Filing | Within 2 business days | Filed no later than the second business day after the earlier of pricing determination or first use of the prospectus |
| Prospectus Use or Delivery | As needed | Used for investor delivery in connection with the registered offering |
| Post-Filing Updates | Not applicable | Subsequent material changes are generally addressed through other permitted filings |
Key Things to Know About Form 424B1 Filing Rules
- Rule 424(b)(1) Filing Category:
Form 424B1 is one of the Rule 424(b) prospectus filing types and is used when the completed prospectus must be filed after effectiveness, often to reflect information omitted under Rule 430A. - Timing Is Event-Driven:
The filing deadline is tied to pricing determination and/or first use of the prospectus after effectiveness, rather than a recurring calendar-based due date. - Used for Final Prospectus Disclosure:
Form 424B1 is generally associated with a final or complete prospectus used in the offering, and it is filed to ensure the final disclosure is available on EDGAR. - Not a Standalone Registration Statement:
Form 424B1 supplements an existing registration statement and does not, by itself, register securities without an underlying registration statement on file. - Often Tracked Alongside Related Filings:
Market participants commonly review Form 424B1 activity together with related offering documents and registration statement filings to understand offering status and disclosure changes.
To monitor public offering prospectus filings and offering document updates, our platform helps you track key SEC filings through the SEC form type directory, issuer filing timelines, such as a recent 424B1 filing list for an issuer, and corporate history views like a company, like Brazil Potash Corp.’s 424B1 activity, so you can stay aligned with offering-stage disclosure and filing cadence.
