MONTROSE ENVIRONMENTAL GROUP

Ticker: MEG CUSIP: 615111101 Class: Common Stock

ACADIAN ASSET MANAGEMENT LLC's Holding History (CIK: 0000916542)

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

Q4 2025

Shares 7,287 Value ($000) $0 Avg Close $26.42 Range $23.36 - $30.90

Q3 2025

Shares 834 Value ($000) $0 Avg Close $26.13 Range $20.34 - $32.00

Q3 2024

Shares 2,904 Value ($000) $0 Avg Close $32.33 Range $24.85 - $45.13

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	7,287	$0	$26.42	$23.36 - $30.90
Q3 2025	834	$0	$26.13	$20.34 - $32.00
Q3 2024	2,904	$0	$32.33	$24.85 - $45.13