X0303 5 2010-12-31 0 0 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001192778 FELTZ STEPHEN P 220 NW SECOND AVE PORTLAND OR 97209 0 1 0 0 Treasurer & Controller Common Stock 2010-01-05 5 G 0 225 0 D 13949 D Common Stock 2010-01-05 5 G 0 225 0 D 13724 D Common Stock 2010-06-18 5 G 0 50 0 D 13674 D Common Stock 2010-12-27 5 G 0 55 0 D 13619 D Common Stock 2010-12-27 5 G 0 160 0 D 13459 D Common Stock 2010-12-27 5 G 0 30 0 D 13429 D Common Stock 2010-12-31 5 G 0 250 0 D 13179 D Common Stock 2010-12-31 5 G 0 250 0 D 12929 D Common Stock 3345.2634 I See Footnote Common Stock 2010-01-05 5 G 0 225 0 A 294.635 I See Footnote Common Stock 2010-12-31 5 G 0 250 0 A 544.635 I See Footnote Common Stock 2010-01-05 5 G 0 225 0 A 228.635 I See Footnote Common Stock 2010-12-31 5 G 0 250 0 A 478.635 I See Footnote Employee Stock Option to Buy 31.34 2014-03-04 Common Stock 5000 5000 D Employee Stock Option to Buy 34.29 2016-02-29 Common Stock 2500 2500 D Employee Stock Option to Buy 44.48 2017-02-28 Common Stock 2000 2000 D Employee Stock Option to Buy 43.29 2018-03-06 Common Stock 2000 2000 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 Held in reporting person's account in issuer's Retirement K Savings Plan as of January 31, 2011. Held by reporting person as custodian under the Oregon Uniform Transfers to Minors Act for Grant M. Feltz. Held by reporting person as custodian under the Oregon Uniform Transfers to Minors Act for Callista Feltz. 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, 2007. Option was granted for 2,500 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 2,000 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 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 February 27, 2009 and January 1, 2010, 2011, and 2012. 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 February 25, 2010 and January 1, 2011, 2012, and 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 February 24, 2011 and January 1, 2012, 2013, and 2014. Shawn M. Filippi, Attorney-in-Fact 2011-02-14