X0306 4 2013-02-27 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001445672 Saathoff MardiLyn 220 NW SECOND AVENUE PORTLAND OR 97209 0 1 0 0 VP, CGO & Corporate Secretary Common Stock 2013-02-27 4 A 0 291 0 A 587.1189 D Common Stock 2013-02-27 4 A 0 73 0 A 242.557 I See Footnote Common Stock 2013-03-01 4 A 0 212 0 A 799.1189 D Common Stock 335.2880 I See Footnote Employee Stock Option to Buy 51.09 2018-09-29 Common Stock 5000 5000 D Employee Stock Option to Buy 41.15 2019-03-04 Common Stock 2000 2000 D Employee Stock Option to Buy 44.25 2020-03-02 Common Stock 2000 2000 D Employee Stock Option to Buy 45.74 2021-03-02 Common Stock 3000 3000 D Shares are issuable as a result of satisfaction of performance goals for 2010-2012 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 2010-2012 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 2012 under restricted stock unit awards. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date. Shares held in reporting person's account under Northwest Natural Gas Company's Retirement K Savings Plan as of January 31, 2013. Option was granted for 5,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option fully vested on January 1, 2012. Option was granted for 2,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option fully vested on January 1, 2013. Option was granted for 2,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 500 shares on each of February 24, 2011 and January 1, 2012, 2013 and 2014. Option was granted for 3,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 750 shares on each of February 23, 2012 and January 1, 2013, 2014 and 2015. Shawn M. Filippi, Attorney-in-Fact 2013-03-01