X0303 4 2011-01-10 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001241405 ANDERSON DAVID HUGO 220 NW SECOND AVENUE PORTLAND OR 97209 0 1 0 0 SVP & CFO Common Stock 2011-01-10 5 G 0 2530 0 D 5063.819 I See Footnote Common Stock 2011-01-10 5 G 0 2530 0 A 31086.249 D Common Stock 2011-01-10 4 S 0 .168 46.46 D 5063.651 I See Footnote Common Stock 2011-01-10 4 S 0 1325 46.0192 D 3738.651 I See Footnote Common Stock 437.9597 I See Footnote Common Stock 597 D Employee Stock Option to Buy 32.02 2014-09-27 Common Stock 16000 16000 D Employee Stock Option to Buy 34.29 2016-02-29 Common Stock 8000 8000 D Employee Stock Option to Buy 44.48 2017-02-28 Common Stock 7000 7000 D Employee Stock Option to Buy 43.29 2018-03-06 Common Stock 8000 8000 D Employee Stock Option to Buy 41.15 2019-03-04 Common Stock 8000 8000 D Employee Stock Option to Buy 44.25 2020-03-02 Common Stock 8000 8000 D These 2,530 shares were previously reported as indirectly beneficially owned under the Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives but pursuant to an earlier election of the executive, were contributed to the reporting person's account, which is jointly owned with his spouse, on January 10, 2011. Reflects shares that have been credited to reporting person's account under the issuer's Deferred Compensation Plan for Directors and Executives. These shares represent a previously scheduled distribution of fractional shares from the Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives that were cashed out using the fair market value as of January 4, 2011. On December 29, 2010 the reporting person elected to sell a portion of a distribution under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives on January 10, 2011 to pay taxes with respect to a distribution on that date. Shares have been credited to reporting person's account under the issuer's Retirement K Savings Plan as of December 31, 2010. Reflects shares that are held in reporting person's individual account. Option was granted for 16,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option fully vested on January 1, 2007. Option was granted for 8,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option fully vested on January 1, 2010. Option was granted for 7,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option fully vested on January 1, 2011. Option was granted for 8,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 2,000 shares on each February 27, 2009 and January 1, 2010, 2011 and 2012. Option was granted for 8,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 2,000 shares on each February 25, 2010 and January 1, 2011, 2012 and 2013. Option was granted for 8,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 2,000 shares on each February 24, 2011 and January 1, 2012, 2013 and 2014. Shawn M. Filippi, Attorney-in-Fact 2011-01-12