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Filing Details

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
1669220	Tiba Aynechi	C/O Mbx Biosciences, Inc. 11711 N. Meridian Street, Suite 300 Carmel IN 46032		No	No	No	No

Reported Non-Derivative Transactions

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	1,386,335	$0.00	1,386,335	No	4	C	Indirect	By Norwest Venture Partners XVI, LP
Common Stock	Acquisiton	2024-09-16	750,000	$16.00	2,136,335	No	4	P	Indirect	By Norwest Venture Partners XVI, LP

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Indirect	By Norwest Venture Partners XVI, LP
No	4	P	Indirect	By Norwest Venture Partners XVI, LP

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series B Convertible Preferred Stock	Disposition	2024-09-16	16,666,666	$0.00	1,386,335	$0.00

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

Footnotes

Each share of Series B Convertible Preferred Stock (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.
The securities are directly held by Norwest Venture Partners XVI, LP ("NVP XVI"). Genesis VC Partners XVI, LLC ("Genesis XVI") is the general partner of NVP XVI and NVP Associates, LLC ("NVP Associates") is the managing member of Genesis XVI. The Reporting Person, as an officer of NVP Associates and director of the Issuer, may be deemed to share voting and dispositive power over the shares held by NVP XVI and disclaims beneficial ownership of such securities except to the extent of her pecuniary interest therein.
Reflects shares purchased in the Issuer's initial public offering.