MASIMO CORP

Ticker: MASI CUSIP: 574795100 Class: Common Stock

ADAMS DIVERSIFIED EQUITY FUND, INC.'s Holding History (CIK: 0000002230)

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

Q4 2017

Shares 8,000 Value ($000) $678 Avg Close $86.74 Range $84.05 - $91.04

Q3 2017

Shares 10,300 Value ($000) $892 Avg Close $88.42 Range $81.01 - $100.00

Q2 2017

Shares 10,700 Value ($000) $976 Avg Close $91.81 Range $82.71 - $104.71

Q1 2017

Shares 12,700 Value ($000) $1,184 Avg Close $82.32 Range $66.79 - $96.68

Q4 2016

Shares 16,400 Value ($000) $1,105 Avg Close $61.46 Range $53.78 - $68.88

Q3 2016

Shares 10,100 Value ($000) $530 Avg Close $56.42 Range $51.10 - $60.52

Q2 2016

Shares 10,100 Value ($000) $530 Avg Close $47.10 Range $41.19 - $53.55

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	8,000	$678	$86.74	$84.05 - $91.04
Q3 2017	10,300	$892	$88.42	$81.01 - $100.00
Q2 2017	10,700	$976	$91.81	$82.71 - $104.71
Q1 2017	12,700	$1,184	$82.32	$66.79 - $96.68
Q4 2016	16,400	$1,105	$61.46	$53.78 - $68.88
Q3 2016	10,100	$530	$56.42	$51.10 - $60.52
Q2 2016	10,100	$530	$47.10	$41.19 - $53.55