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 OF SECURITIES 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 * ANDERSON DAVID HUGO   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) President & COO (Last) (First) (Middle) 220 NW SECOND AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 03/17/2016 (Street) PORTLAND, OR 97209 4. If Amendment, Date Original Filed(Month/Day/Year) 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 03/17/2016   M   7,000 (1) A $ 44.48 61,058.8124 D   Common Stock 03/17/2016   S   6,362 D $ 52.2638 (1) 54,696.8124 D   Common Stock 03/17/2016   M   8,000 (1) A $ 41.15 62,696.8124 D   Common Stock 03/17/2016   S   6,945 D $ 52.2638 (1) 55,751.8124 D   Common Stock               919.4967 I See Footnote (2) Common Stock               8,247.699 I See Footnote (3)

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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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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

$ 44.48

03/17/2016

M

7,000

(4)

02/28/2017

Common Stock

7,000

$ 0

0

D

Employee Stock Option to Buy (Common Stock)

$ 41.15

03/17/2016

M

8,000

(5)

03/04/2019

Common Stock

8,000

$ 0

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
ANDERSON DAVID HUGO 220 NW SECOND AVENUE PORTLAND, OR 97209			President & COO

Signatures

Shawn M. Filippi, Attorney-in-Fact		03/18/2016
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Reporting person exercised options to purchase a total of 15,000 shares, 7,000 shares at $44.48 each, and 8,000 shares at $41.15 each. Reporting person then sold an aggregate of 13,307 of those shares, at prices ranging from $52.11 to $52.48, resulting in an average price of $52.2638, to generate the proceeds required to purchase the remaining 1,693 shares of the Company common stock under the options. Northwest Natural Gas Company 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 have been credited to reporting person's account under the issuer's Retirement K Savings Plan as of February 29, 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 February 21, 2008, and January 1, 2009, 2010, and 2011.
(5)	The option vested in four equal installments on February 25, 2010, and January 1, 2011, 2012, and 2013.

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