X0304 4 2012-02-29 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001329527 Kirkpatrick Margaret D 220 NW SECOND AVENUE PORTLAND OR 97209 0 1 0 0 VP & General Counsel Common Stock 2012-02-29 4 F 0 216 0 D 7365.1497 D Common Stock 442.7312 I See Footnote Employee Stock Option to Buy 38.3 2015-08-03 Common Stock 6000 6000 D Employee Stock Option to Buy 34.29 2016-02-29 Common Stock 5000 5000 D Employee Stock Option to Buy 44.48 2017-02-28 Common Stock 4000 4000 D Employee Stock Option to Buy 43.29 2018-03-06 Common Stock 4000 4000 D Employee Stock Option to Buy 41.15 2019-03-04 Common Stock 4000 4000 D Employee Stock Option to Buy 44.25 2020-03-02 Common Stock 4000 4000 D Employee Stock Option to Buy 45.74 2021-03-02 Common Stock 6500 6500 D Shares were withheld by the issuer to cover withholding taxes on issuance of performance shares. Organization and Executive Compensation Committee certification of the payout of these performance shares was reported on Form 4 filed on February 23, 2012. Shares held in reporting person's account under Northwest Natural Gas Company's Retirement K Savings Plan as of February 29, 2012. Option was granted for 6,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option fully vested on January 1, 2008. 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, 2010. Option was granted for 4,000 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 4,000 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 4,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 1,000 shares on each February 25, 2010 and January 1, 2011, 2012 and 2013. Option was granted for 4,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 1,000 shares on each February 24, 2011 and January 1, 2012, 2013 and 2014. Option was granted for 6,500 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 1,625 shares on each February 23, 2012 and January 1, 2013, 2014 and 2015. Shawn M. Filippi Attorney-in-Fact 2012-03-02