Tempus AI Registration Declared Effective: IPO Filings Explained

Key takeaways

• An SEC EFFECT notice for Tempus AI, Inc. (CIK 0001717115) was posted on EDGAR early on Oct. 22, 2026. The notice is dated Oct. 21.
• An EFFECT notice records that a registration statement has been declared effective. That is a procedural step in the SEC registration process.
• The notice is a small administrative record, listed at 1 KB. It is not a prospectus and does not by itself describe the size, price or timing of any sale of securities.
• Readers tracking IPO filings should look for the underlying registration statement and any related prospectus for the actual terms.

What was filed

EDGAR, the SEC’s public filing database, shows an “EFFECT” entry for Tempus AI, Inc. The entry carries the accession number 9999999995-26-003312 and says it was filed on Oct. 21, 2026. The database timestamp is shortly after midnight Eastern on Oct. 22.

Detail	Entry
Filer	Tempus AI, Inc.
CIK	0001717115
Form type	EFFECT
Filed	Oct. 21, 2026
Accession no.	9999999995-26-003312
Size	1 KB

What an EFFECT notice means in the listing process

Before a company can sell securities to the public under a registration statement, such as an S-1 or other registration form, that statement generally has to be declared effective by the SEC. Staff review comes first, and the company usually responds to comments and amends its filing. When the review is finished, the filing is declared effective.

EDGAR then posts a short EFFECT notice. It is a bare-bones record: it gives the filer’s name, a timestamp and a form type, and little else. That is why the file is only about 1 KB. The substance sits in the registration statement and in any final prospectus filed afterward.

For that reason, an EFFECT notice is a signal to go read other documents. It confirms that a registration has cleared the SEC’s effectiveness step. It doesn’t say what was registered, how many securities are involved or who is selling them.

Why effectiveness notices matter for IPO filings

The notices are a useful marker for anyone building an IPO calendar or watching the listing process. They show when a registration has crossed a formal threshold. In a traditional initial public offering, effectiveness usually comes just before pricing and the start of trading. Effectiveness is also relevant to other registered offerings, including resale registrations and follow-on sales by companies that already have public shares.

Because the notice looks the same in each case, it can’t tell readers which kind of transaction it relates to. Reading a calendar entry as an IPO simply because an EFFECT notice appeared would be a mistake. The accompanying registration statement is what shows whether the filing relates to a first-time listing, a secondary offering or something else.

Who is affected

Several groups follow these notices closely:

• Investors and analysts use them to find out when a registered offering may be able to proceed, then turn to the prospectus for terms and risk disclosures.
• Underwriters and counsel treat effectiveness as a gating item for launching or closing a deal.
• Existing shareholders may be affected if the registration covers shares they hold or if new shares are being issued. The details are in the registration statement.
• Calendar and data providers use EDGAR notices as inputs, then cross-check them with company announcements.

What to watch next

Several follow-up filings would clarify the situation:

1. The registration statement and any amendments. These show the form type, the securities covered and the intended use of proceeds.
2. A final prospectus. Filings such as a 424(b) prospectus typically follow effectiveness when securities are actually sold, and they include final terms.
3. Company announcements. A press release or exchange notice would say whether an offering has launched or priced, and on which market any shares trade.

Until those documents are reviewed, the only firm conclusion is the narrow one: the SEC’s records show a registration for Tempus AI, Inc. was declared effective, with the notice dated Oct. 21, 2026.

The bottom line

The EFFECT notice is a small but meaningful procedural milestone. It tells readers that a regulatory gate has been passed, and it points them to the filings where the real details live. Lystr Digest will follow the related documents as they appear on EDGAR. This article is a factual summary of a public record and not investment advice.