NORTHWEST NAT HLDG CO

Ticker: NWN CUSIP: 66765N105 Class: Common Stock

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

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

Q4 2020

Shares 7,373 Value ($000) $339 Avg Close $47.35 Range $42.33 - $52.30

Q3 2020

Shares 11,792 Value ($000) $535 Avg Close $51.04 Range $43.34 - $56.58

Q2 2020

Shares 11,792 Value ($000) $658 Avg Close $61.09 Range $52.39 - $67.24

Q1 2020

Shares 11,792 Value ($000) $728 Avg Close $69.90 Range $50.50 - $77.26

Q4 2019

Shares 11,792 Value ($000) $869 Avg Close $69.05 Range $62.87 - $74.13

Q3 2019

Shares 11,792 Value ($000) $841 Avg Close $70.88 Range $68.42 - $73.50

Q2 2019

Shares 11,792 Value ($000) $820 Avg Close $67.64 Range $63.48 - $70.22

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	7,373	$339	$47.35	$42.33 - $52.30
Q3 2020	11,792	$535	$51.04	$43.34 - $56.58
Q2 2020	11,792	$658	$61.09	$52.39 - $67.24
Q1 2020	11,792	$728	$69.90	$50.50 - $77.26
Q4 2019	11,792	$869	$69.05	$62.87 - $74.13
Q3 2019	11,792	$841	$70.88	$68.42 - $73.50
Q2 2019	11,792	$820	$67.64	$63.48 - $70.22