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Filing Details

Accession Number:: 0000950170-24-117772
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2024-10-28 16:53:56
Reporting Period:: 2024-10-28

Accepted Time:: 2024-10-28 16:53:56
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1984086	Septerna Inc.	SEPN	()	DE

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1778071	Third Rock Ventures V, L.p.	C/O Third Rock Ventures, Llc 201 Brookline Ave, Suite 1401 Boston MA 02215	No	No	No	No
1931056	Third Rock Ventures Vi, L.p.	C/O Third Rock Ventures, Llc 201 Brookline Ave, Suite 1401 Boston MA 02215	No	No	No	No
1977498	Third Rock Ventures Gp V, Lp	C/O Third Rock Ventures, Llc 201 Brookline Ave, Suite 1401 Boston MA 02215	No	No	No	No
1977499	Third Rock Ventures Gp Vi, L.p.	C/O Third Rock Ventures, Llc 201 Brookline Ave, Suite 1401 Boston MA 02215	No	No	No	No
1990716	Trv Gp Vi, Llc	C/O Third Rock Ventures, Llc 201 Brookline Ave, Suite 1401 Boston MA 02215	No	No	No	No
1990717	Trv Gp V, Llc	C/O Third Rock Ventures, Llc 201 Brookline Ave, Suite 1401 Boston MA 02215	No	No	No	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2024-10-28	4,790,773	$0.00	5,845,091	No	4	C	Direct
Common Stock	Acquisiton	2024-10-28	2,872,956	$0.00	2,872,956	No	4	C	Indirect	See Footnotes
Common Stock	Acquisiton	2024-10-28	370,500	$18.00	6,215,591	No	4	P	Direct
Common Stock	Acquisiton	2024-10-28	279,500	$18.00	3,152,456	No	4	P	Indirect	See Footnotes

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Direct
No	4	C	Indirect	See Footnotes
No	4	P	Direct
No	4	P	Indirect	See Footnotes

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series A Preferred Stock	Disposition	2024-10-28	41,250,000	$0.00	4,790,773	$0.00
Common Stock	Series B Preferred Stock	Disposition	2024-10-28	24,737,017	$0.00	2,872,956	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	C	Direct
0			No	4	C	Indirect

Footnotes

Upon the closing of the Issuer's initial public offering, each share of Series A Preferred Stock and Series B Preferred Stock (collectively, the "Preferred Stock") automatically converted into Common Stock on a one-for-8.6103 basis without payment of consideration. The Preferred Stock had no expiration date.
The shares are held directly by Third Rock Ventures V, L.P. ("TRV V"). The general partner of TRV V is Third Rock Ventures GP V, L.P. ("TRV GP V"). The general partner of TRV GP V is TRV GP V, LLC ("TRV GP V LLC"). Each of TRV GP V, and TRV GP V LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares.
The shares are held directly by Third Rock Ventures VI, L.P. ("TRV VI"). The general partner of TRV VI is Third Rock Ventures GP VI, L.P. ("TRV GP VI"). The general partner of TRV GP VI is TRV GP VI, LLC ("TRV GP VI LLC"). Each of TRV GP VI, and TRV GP VI LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares.
Each of Reporting Persons disclaims the existence of a Section 13(d) "group" as between the TRV V related parties and the TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties.