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Filing Details

Accession Number:: 0000950170-24-107524
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2024-09-17 20:05:10
Reporting Period:: 2024-09-16

Accepted Time:: 2024-09-17 20:05:10
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1776111	Mbx Biosciences Inc.	MBX	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1282930	L Carl Gordon	C/O Mbx Biosciences, Inc. 11711 N. Meridian Street, Suite 300 Carmel IN 46032		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	2024-09-16	2,658,428	$0.00	2,658,428	No	4	C	Indirect	By OrbiMed Private Investments VII, LP
Common Stock	Acquisiton	2024-09-16	403,787	$0.00	403,787	No	4	C	Indirect	By OrbiMed Genesis Master Fund, L.P.
Common Stock	Acquisiton	2024-09-16	500,000	$16.00	3,158,428	No	4	P	Indirect	By OrbiMed Private Investments VII, LP
Common Stock	Acquisiton	2024-09-16	250,000	$16.00	653,787	No	4	P	Indirect	By OrbiMed Genesis Master Fund, L.P.

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Indirect	By OrbiMed Private Investments VII, LP
No	4	C	Indirect	By OrbiMed Genesis Master Fund, L.P.
No	4	P	Indirect	By OrbiMed Private Investments VII, LP
No	4	P	Indirect	By OrbiMed Genesis Master Fund, L.P.

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series A Convertible Preferred Stock	Disposition	2024-09-16	12,372,634	$0.00	1,029,157	$0.00
Common Stock	Series B Convertible Preferred Stock	Disposition	2024-09-16	19,587,284	$0.00	1,629,271	$0.00
Common Stock	Series C Convertible Preferred Stock	Disposition	2024-09-16	4,854,368	$0.00	403,787	$0.00

Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect

Footnotes

Each share of Series A Convertible Preferred Stock, Series B Convertible Preferred Stock and Series C Convertible Preferred Stock (collectively, the "Preferred Stock") was convertible into Common Stock on a one-for-12.0221 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 immediately prior to the closing of the Issuer's initial public offering on September 16, 2024. The Preferred Stock had no expiration date.
These securities are held of record by OrbiMed Private Investments VII, LP ("OPI VII"). OrbiMed Capital GP VII LLC ("GP VII") is the general partner of OPI VII. OrbiMed Advisors LLC ("OrbiMed Advisors") is the managing member of GP VII. By virtue of such relationships, OrbiMed Advisors and GP VII may be deemed to have voting power and investment power over the securities held by OPI VII and as a result, may be deemed to have beneficial ownership over such securities. OrbiMed Advisors exercises voting and investment power through a management committee comprised of the Reporting Person, Sven H. Borho, and W. Carter Neild, each of whom disclaims beneficial ownership of the shares held by OPI VII.
These securities are held of record by OrbiMed Genesis Master Fund, L.P. ("Genesis Master Fund"). OrbiMed Genesis GP LLC ("Genesis GP") is the general partner of OrbiMed Genesis. OrbiMed Advisors is the managing member of Genesis GP. By virtue of such relationships, OrbiMed Advisors and Genesis GP may be deemed to have voting power and investment power over the securities held by Genesis Master Fund and as a result, may be deemed to have beneficial ownership over such securities. OrbiMed Advisors exercises voting and investment power through a management committee comprised of the Reporting Person, Sven H. Borho, and W. Carter Neild, each of whom disclaims beneficial ownership of the shares held by Genesis Master Fund.
Each of OrbiMed Advisors, GP VII, Genesis GP, and the Reporting Person disclaims beneficial ownership of the securities reported herein for purposes of Rule 16a-1(a) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), except to the extent of its pecuniary interest therein, if any. This report on Form 4 shall not be deemed an admission that any such entity or person is a beneficial owner of such securities for purpose of Section 16 of the Exchange Act, or for any other purpose.
Reflects shares purchased in the Issuer's initial public offering.