OSI SYSTEMS INC

Ticker: OSIS CUSIP: 671044105 Class: EQTY

DRIEHAUS CAPITAL MANAGEMENT LLC's Holding History (CIK: 0000938206)

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

Q4 2025

Shares 235,768 Value ($000) $60,135 Avg Close $261.19 Range $231.66 - $292.34

Q3 2025

Shares 147,054 Value ($000) $36,652 Avg Close $228.27 Range $204.00 - $249.79

Q2 2025

Shares 102,713 Value ($000) $23,096 Avg Close $213.44 Range $164.08 - $241.64

Q3 2013

Shares 22,273 Value ($000) $1,657 Avg Close $71.00 Range $63.20 - $76.25

Q2 2013

Shares 34,133 Value ($000) $2,199 Avg Close $58.30 Range $48.10 - $67.50

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	235,768	$60,135	$261.19	$231.66 - $292.34
Q3 2025	147,054	$36,652	$228.27	$204.00 - $249.79
Q2 2025	102,713	$23,096	$213.44	$164.08 - $241.64
Q3 2013	22,273	$1,657	$71.00	$63.20 - $76.25
Q2 2013	34,133	$2,199	$58.30	$48.10 - $67.50