SEPN plans sale of 746,500 shares via BTIG

SEPN filed a notice of proposed sale of common stock through broker BTIG LLC, located in San Francisco.

Rhea-AI Filing Summary

SEPN filed a notice of proposed sale of common stock through broker BTIG LLC, located in San Francisco. The filing lists 746,500 common shares to be sold on NASDAQ, with an aggregate market value of $35,973,835.00. Total common shares outstanding are reported as 46,676,947. The shares proposed for sale were acquired in two blocks related to IPO settlement or private funding on May 24, 2024 (404,900 shares) and October 25, 2024 (341,600 shares).

Key Figures

Shares proposed for sale: 746,500 shares Aggregate market value: $35,973,835.00 Shares outstanding: 46,676,947 shares +2 more

5 metrics

Shares proposed for sale 746,500 shares Common stock to be sold through BTIG LLC on NASDAQ

Aggregate market value $35,973,835.00 Aggregate market value of 746,500 common shares proposed for sale

Shares outstanding 46,676,947 shares Total common shares outstanding for SEPN

Shares acquired 05/24/2024 404,900 shares Common shares acquired via IPO settlement / Private funding

Shares acquired 10/25/2024 341,600 shares Common shares acquired via IPO settlement / Private funding

Key Terms

Form 144, IPO settlement, Private funding, aggregate market value

4 terms

Form 144 regulatory

"Filer Information | | | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

IPO settlement financial

"341600 | 10/25/2024 | IPO settlement / Private funding"

Private funding financial

"404900 | 05/24/2024 | IPO settlement / Private funding"

aggregate market value financial

"746500 | 35973835.00 | 46676947 | 08/12/2026 | NASDAQ"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stock sale is disclosed for SEPN in this Form 144?

The filing discloses a proposed sale of 746,500 common shares of SEPN through BTIG LLC on NASDAQ, with an aggregate market value of $35,973,835.00 based on the provided figures.

What is SEPN’s total common shares outstanding in this filing?

The filing reports that SEPN has 46,676,947 common shares outstanding. This figure is provided as context for the proposed sale of 746,500 shares disclosed in the same document.

How and when were the SEPN shares proposed for sale originally acquired?

The shares were acquired in two transactions: 404,900 shares on May 24, 2024 and 341,600 shares on October 25, 2024, both described as related to “IPO settlement / Private funding.”

Who is the broker for the proposed SEPN share sale?

The proposed sale will be handled by BTIG LLC, listed with an address at 350 Bush St, 9th Floor, San Francisco, CA 94104. BTIG LLC is identified as the broker in the Form 144 disclosure.

On which market is the SEPN stock sale expected to occur?

The Form 144 indicates that the 746,500 common shares of SEPN are proposed to be sold on NASDAQ. This market designation applies to the common stock described in the filing.

Does the Form 144 for SEPN list recent sales in the past 3 months?

The Form 144 includes a section titled “Securities Sold During The Past 3 Months”, but the provided content does not show any completed sales listed in that section.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/12/2026 - 06:55 PM Accepted by SEC EDGAR 08/12/2026 - 06:55 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001883840
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Septerna, Inc.
SEC File Number	001-42382
Address of Issuer	250 EAST GRAND AVENUE, SUITE 65 SOUTH SAN FRANCISCO CALIFORNIA 94080
Phone	650-338-3533
Name of Person for Whose Account the Securities are To Be Sold	RA Capital Nexus Fund III, L.P.
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Affiliate

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	BTIG LLC 350 Bush St, 9th FL, San Francisco CA 94104	746500	35973835.00	46676947	08/12/2026	NASDAQ GM

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	10/25/2024	IPO / Private round	Company			341600	10/25/2024	IPO settlement / Private funding
Common	05/24/2024	IPO / Private round	Company			404900	05/24/2024	IPO settlement / Private funding

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	08/12/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Rajeev Shah
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)