X0306 4 2014-02-26 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001192777 DOOLITTLE LEA ANNE 220 NW SECOND AVENUE PORTLAND OR 97209 0 1 0 0 Chief Adm. Officer & SVP Common Stock 2014-02-26 4 A 0 465 0 A 3957.368 D Common Stock 2014-02-26 4 A 0 117 0 A 1359.203 I See Footnote Common Stock 2014-02-26 4 A 0 467 0 A 4424.368 D Common Stock 2014-02-26 4 A 0 83 0 A 1442.203 I See Footnote Common Stock 2014-02-26 4 A 0 30 0 A 260.5179 I See Footnote Common Stock 483.985 I See Footnote Common Stock 7439.2228 I See Footnote Common Stock 243.8289 I See Footnote Shares are issuable as a result of satisfaction of performance goals for 2011-2013 under a performance share award. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date. Shares are issuable as a result of satisfaction of performance goals for 2011-2013 under a performance share award, and credited to reporting person's account under the issuer's Deferred Compensation Plan for Directors and Executives pursuant to a prior election. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date. Shares have been credited to reporting person's account under the issuer's Deferred Compensation Plan for Directors and Executives. Shares are issuable as a result of satisfaction of the performance threshold for 2013 under restricted stock unit awards. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date. Shares are issuable as a result of satisfaction of the performance threshold for 2013 under restricted stock unit awards, and credited to reporting person's account under the issuer's Deferred Compensation Plan for Directors and Executives pursuant to a prior election. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date. Shares held in account of reporting person's spouse. Shares have been credited to reporting person's account under the issuer's Executive Deferred Compensation Plan. Shares held in reporting person's account under issuer's Retirement K Savings Plan as of January 31, 2014. Shares held in account of reporting person's spouse under issuer's Retirement K Savings Plan as of January 31, 2014. Shawn M. Filippi, Attorney-in-Fact 2014-02-28