INTUITIVE SURGICAL INC

Ticker: ISRG CUSIP: 46120E602 Class: COM NEW

American Investment Services, Inc.'s Holding History (CIK: 0001369913)

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

Q1 2019

Shares 525 Value ($000) $300 Avg Close $177.73 Range $148.82 - $193.08

Q4 2018

Shares 525 Value ($000) $251 Avg Close $169.46 Range $143.41 - $193.71

Q3 2018

Shares 525 Value ($000) $301 Avg Close $177.57 Range $157.27 - $191.80

Q2 2018

Shares 525 Value ($000) $251 Avg Close $152.50 Range $131.19 - $165.64

Q1 2018

Shares 525 Value ($000) $217 Avg Close $139.55 Range $121.70 - $150.67

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2019	525	$300	$177.73	$148.82 - $193.08
Q4 2018	525	$251	$169.46	$143.41 - $193.71
Q3 2018	525	$301	$177.57	$157.27 - $191.80
Q2 2018	525	$251	$152.50	$131.19 - $165.64
Q1 2018	525	$217	$139.55	$121.70 - $150.67