MASIMO CORP

Ticker: MASI CUSIP: 574795100 Class: Common Stock

Parallax Volatility Advisers, L.P.'s Holding History (CIK: 0001521001)

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

Q4 2017

Shares 6,846 Value ($000) $581 Avg Close $86.74 Range $84.05 - $91.04

Q1 2017

Shares 131 Value ($000) $12 Avg Close $82.32 Range $66.79 - $96.68

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	6,846	$581	$86.74	$84.05 - $91.04
Q1 2017	131	$12	$82.32	$66.79 - $96.68