MBX BIOSCIENCES INC

Ticker: MBX CUSIP: 55287L101 Class: Common Stock

PRICE T ROWE ASSOCIATES INC /MD/'s Holding History (CIK: 0000080255)

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

Q4 2025

Shares 840,506 Value ($000) $27 Avg Close $24.26 Range $12.94 - $35.55

Q3 2025

Shares 954,726 Value ($000) $17 Avg Close $13.37 Range $9.63 - $26.47

Q2 2025

Shares 1,346,910 Value ($000) $15 Avg Close $10.19 Range $4.81 - $14.34

Q1 2025

Shares 1,100,916 Value ($000) $8 Avg Close $10.57 Range $7.16 - $19.39

Q4 2024

Shares 1,161,527 Value ($000) $21 Avg Close $21.31 Range $15.31 - $27.50

Q3 2024

Shares 1,192,938 Value ($000) $31 Avg Close $22.87 Range $20.29 - $26.19

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	840,506	$27	$24.26	$12.94 - $35.55
Q3 2025	954,726	$17	$13.37	$9.63 - $26.47
Q2 2025	1,346,910	$15	$10.19	$4.81 - $14.34
Q1 2025	1,100,916	$8	$10.57	$7.16 - $19.39
Q4 2024	1,161,527	$21	$21.31	$15.31 - $27.50
Q3 2024	1,192,938	$31	$22.87	$20.29 - $26.19