Septerna CMO files initial ownership, no shares

Septerna’s Chief Medical Officer Rajiv Patni filed an initial ownership report showing no reported holdings or insider trades.

Rhea-AI Filing Summary

Septerna, Inc. (SEPN) filed an initial statement of beneficial ownership on behalf of Rajiv Patni, who serves as Chief Medical Officer. The filing reports no equity transactions or holdings for him at this time and includes an Exhibit 24 Power of Attorney authorizing the filing.

Key Terms

Power of Attorney

1 terms

Power of Attorney regulatory

"remarks note "Exhibit 24 - Power of Attorney""

A power of attorney is a legal document that allows one person to make decisions and act on behalf of another person, often in financial or legal matters. It’s like giving someone a trusted helper or agent the authority to handle important tasks if you are unable to do so yourself. This matters to investors because it can impact how their assets are managed or transferred if they become unable to oversee their affairs.

FAQ

What does the new Form 3 filing mean for Septerna, Inc. (SEPN)?

The Form 3 reports that Chief Medical Officer Rajiv Patni is an officer of Septerna, Inc. and provides his initial beneficial ownership disclosure. It shows no reported equity holdings or insider trades for him as of the filing date.

Did Rajiv Patni report any Septerna (SEPN) stock transactions on this Form 3?

No. The Form 3 shows no reported purchases, sales, or other equity transactions by Chief Medical Officer Rajiv Patni, and the transaction summary reflects zero activity across all categories.

What role does Rajiv Patni have at Septerna, Inc. (SEPN)?

Rajiv Patni is reported as an officer of Septerna, Inc. with the title Chief Medical Officer. The Form 3 identifies him in this capacity for purposes of insider ownership reporting.

Does the Form 3 indicate any current Septerna (SEPN) share ownership by Rajiv Patni?

The filing’s transaction and holdings sections show no reported share ownership for Rajiv Patni at this time. There are no non-derivative or derivative positions listed in the Form 3 data provided.

What is the Exhibit 24 Power of Attorney mentioned in the Septerna (SEPN) Form 3?

The remarks note an Exhibit 24 - Power of Attorney, which authorizes designated parties to sign and submit SEC ownership forms on the officer’s behalf. It is an administrative document attached to this Form 3 filing.

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

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Available on EDGAR 09/03/2026 - 07:04 PM Accepted by SEC EDGAR 09/03/2026 - 07:03 PM Learn about SEC filing dates

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
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hours per response:			0.5

1. Name and Address of Reporting Person^*

Patni Rajiv

(Last) (First) (Middle)

C/O SEPTERNA, INC.

250 EAST GRAND AVENUE

(Street)

SOUTH SAN FRANCISCO CALIFORNIA 94080

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
08/24/2026

3. Issuer Name and Ticker or Trading Symbol
Septerna, Inc. [ SEPN ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Medical Officer

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Exhibit 24 - Power of Attorney

No securities are beneficially owned.

	/s/ Mark A. Wilson, Attorney-in-Fact	09/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)