MBX BIOSCIENCES INC

Ticker: MBX CUSIP: 55287L101 Class: Common Stock

RA CAPITAL MANAGEMENT, L.P.'s Holding History (CIK: 0001346824)

Note: Option positions (PUT/CALL) are excluded.

Q2 2025

Shares 377,841 Value ($000) $4,311 Avg Close $10.19 Range $4.81 - $14.34

Q1 2025

Shares 1,511,334 Value ($000) $11,154 Avg Close $10.57 Range $7.16 - $19.39

Q4 2024

Shares 1,511,334 Value ($000) $27,854 Avg Close $21.31 Range $15.31 - $27.50

Q3 2024

Shares 1,511,334 Value ($000) $39,264 Avg Close $22.87 Range $20.29 - $26.19

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2025	377,841	$4,311	$10.19	$4.81 - $14.34
Q1 2025	1,511,334	$11,154	$10.57	$7.16 - $19.39
Q4 2024	1,511,334	$27,854	$21.31	$15.31 - $27.50
Q3 2024	1,511,334	$39,264	$22.87	$20.29 - $26.19