Frazier Life Sciences Public Fund, L.P.

13F Holdings History for MBX Biosciences, Inc. - Common Stock, par value $0.0001 per share (MBX)

Symbol: MBX on Nasdaq
Investment type: Equity / Common Stock, par value $0.0001 per share
Latest Disclosed Ownership: 5.22M shares
Security Ownership: 11.7%

Patrick J. Heron ownership in MBX Biosciences, Inc. Common Stock, par value $0.0001 per share (MBX)

2025-09-30 - Patrick J. Heron has filed an SCHEDULE 13D/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 5.22M shares of MBX Biosciences, Inc. Common Stock, par value $0.0001 per share (MBX). This represents 11.7% percent ownership of the company. In their previous filing dated 2025-08-20, Frazier Life Sciences Public Fund, L.P. had reported owning 4.56M shares, indicating an increase of 14.6% percent.

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filed at
Patrick J. Heron	11.7%	-13.6%	$72.6M	5.22M	+666,998	+14.6%	$13.89	13D/A	9/26/2025	30 Sep 2025 17:01:06
Patrick J. Heron	13.6%		$63.3M	4.56M			$13.89	13D/A	8/18/2025	20 Aug 2025 17:23:18