DEXCOM INC

Ticker: DXCM CUSIP: 252131107 Class: EQTY

Main Street Research LLC's Holding History (CIK: 0001513211)

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

Q4 2021

Shares 470 Value ($000) $252 Avg Close $143.69 Range $127.62 - $164.86

Q3 2021

Shares 500 Value ($000) $273 Avg Close $126.11 Range $105.19 - $144.75

Q2 2021

Shares 500 Value ($000) $213 Avg Close $96.03 Range $79.61 - $109.91

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2021	470	$252	$143.69	$127.62 - $164.86
Q3 2021	500	$273	$126.11	$105.19 - $144.75
Q2 2021	500	$213	$96.03	$79.61 - $109.91