MESA LABS INC

Ticker: MLAB CUSIP: 59064R109 Class: Common Stock

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP's Holding History (CIK: 0001164508)

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

Q4 2025

Shares 6,228 Value ($000) $489 Avg Close $75.96 Range $66.39 - $83.18

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	6,228	$489	$75.96	$66.39 - $83.18