MONTROSE ENVIRONMENTAL GROUP

Ticker: MEG CUSIP: 615111101 Class: Common Stock

BROWN BROTHERS HARRIMAN & CO's Holding History (CIK: 0000014661)

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

Q4 2025

Shares 117 Value ($000) $3 Avg Close $26.42 Range $23.36 - $30.90

Q3 2022

Shares 248 Value ($000) $8 Avg Close $39.65 Range $32.65 - $48.68

Q2 2022

Shares 248 Value ($000) $8 Avg Close $41.81 Range $28.36 - $57.49

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	117	$3	$26.42	$23.36 - $30.90
Q3 2022	248	$8	$39.65	$32.65 - $48.68
Q2 2022	248	$8	$41.81	$28.36 - $57.49