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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
73020	Northwest Natural Gas Co	NWN	Natural Gas Distribution (4924)	930256722

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1383905	R David Williams	220 Nw Second Avenue Portland OR 97209	Vice President	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2015-03-19	2,500	$34.29	6,565	No	4	M	Direct
Common Stock	Disposition	2015-03-19	2,500	$46.91	4,065	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option to Buy	Disposition	2015-03-19	2,500	$0.00	2,500	$34.29

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0		2016-02-29	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	2,253	Indirect	See Footnote
Common Stock	2,815	Indirect	See Footnote

Footnotes

This transaction was executed in multiple trades on reported date with prices ranging from $46.86 - $47.00, resulting in an average price of $46.9082.
Shares are held in reporting person's account under issuer's Retirement K Savings Plan as of February 28, 2015.
Reflects shares that have been credited to reporting person's account under the issuer's Deferred Compensation Plan for Directors and Executives.
The option vested in four equal installments on 2/22/2007, and January 1st in 2008, 2009, and 2010.
Option was granted as part of compensation for services. The option was exercised in a cashless exercise.