Sec Form 4 Filing - Saathoff MardiLyn @ NORTHWEST NATURAL GAS CO - 2016-06-14

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Saathoff MardiLyn 2. Issuer Name and Ticker or Trading Symbol NORTHWEST NATURAL GAS CO [ NWN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) SVP, General Counsel & Reg. (Last) (First) (Middle) 220 NW SECOND AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 06/14/2016 (Street) PORTLAND, OR97209 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 06/14/2016 M 5,000 A $ 51.09 7,012.4072 D Common Stock 06/14/2016 S 5,000 D $ 59.2206 ( 1 ) 2,012.4072 D Common Stock 914.8803 I See Footnote ( 2 ) Common Stock 1,898.892 I See Footnote ( 3 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Employee Stock Option to Buy $ 51.09 06/14/2016 M 5,000 ( 4 ) 09/29/2018 Common Stock 5,000 $ 0 ( 5 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Saathoff MardiLyn 220 NW SECOND AVENUE PORTLAND, OR97209 SVP, General Counsel & Reg. Signatures Shawn M. Filippi, Attorney-in-Fact 06/16/2016 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This transaction was executed in multiple trades on reported date with prices ranging from $59.15 - $59.30, resulting in an average price of $59.2206. Northwest Natural Gas Company ("Issuer") will provide upon request by the Commission staff or a security holder of the Issuer full information regarding the number of shares purchased or sold at each separate price. ( 2 )Shares held in reporting person's account under Issuer's Retirement K Savings Plan as of May 31, 2016. ( 3 )Shares have been credited to reporting person's account under the Issuer's Deferred Compensation Plan for Directors and Executives. ( 4 )The option vested in four equal installments on September 22, 2009, and January 1, 2010, 2011 and 2012. ( 5 )Option was granted as part of compensation for services. The option was exercised as a cashless exercise.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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