X0306 4 2013-03-06 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001192779 KANTOR GREGG S 220 NW SECOND AVE PORTLAND OR 97209 1 1 0 0 President & CEO Common Stock 2013-03-06 4 F 0 809 44.01 D 27213.0646 D Common Stock 2013-03-06 4 F 0 473 44.01 D 26740.0646 D Common Stock 3332.260 I See Footnote Common Stock 3474.8639 I See Footnote Common Stock 200 I See Footnote Common Stock 570 I See Footnote Employee Stock Option to Buy 34.29 2016-02-29 Common Stock 3000 3000 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 25000 25000 D Employee Stock Option to Buy 44.25 2020-03-02 Common Stock 30000 30000 D Employee Stock Option to Buy 45.74 2021-03-02 Common Stock 30000 30000 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 March 1, 2013. Shares were withheld by the issuer to cover withholding taxes on issuance of shares due to vesting of restricted stock units. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold and vesting for these restricted stock units was reported on Form 4 filed on March 1, 2013. Shares have been credited to reporting person's account under the issuer's Deferred Compensation Plan for Directors and Executives. Held in reporting person's account under issuer's Retirement K Savings Plan as of February 28, 2013. Shares held in reporting person's parent's account, with respect to which the reporting person is Power of Attorney and a potential beneficiary. Held in reporting person's parent's IRA account, with respect to which the reporting person is Power of Attorney and a potential beneficiary. Option was granted for 3,000 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 fully vested on January 1, 2012. Option was granted for 25,000 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 30,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 7,500 shares on each February 24, 2011 and January 1, 2012, 2013, and 2014. Option was granted for 30,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 7,500 shares on each February 23, 2012 and January 1, 2013, 2014 and 2015. Shawn M. Filippi, Attorney-in-Fact 2013-03-07