MASIMO CORP

Ticker: MASI CUSIP: 574795100 Class: Common Stock

Optiver Holding B.V.'s Holding History (CIK: 0001859606)

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

Q4 2025

Shares 18 Value ($000) $2 Avg Close $143.19 Range $129.77 - $157.72

Q3 2025

Shares 110 Value ($000) $16 Avg Close $151.39 Range $135.34 - $172.55

Q2 2025

Shares 124 Value ($000) $21 Avg Close $159.72 Range $133.70 - $174.50

Q1 2025

Shares 118 Value ($000) $20 Avg Close $173.51 Range $159.29 - $194.88

Q4 2024

Shares 44 Value ($000) $7 Avg Close $157.91 Range $131.60 - $180.97

Q3 2024

Shares 94 Value ($000) $13 Avg Close $116.03 Range $101.61 - $135.78

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	18	$2	$143.19	$129.77 - $157.72
Q3 2025	110	$16	$151.39	$135.34 - $172.55
Q2 2025	124	$21	$159.72	$133.70 - $174.50
Q1 2025	118	$20	$173.51	$159.29 - $194.88
Q4 2024	44	$7	$157.91	$131.60 - $180.97
Q3 2024	94	$13	$116.03	$101.61 - $135.78