Sec Form 4 Filing - MITTELSTAEDT RONALD J @ Waste Connections, Inc. - 2018-08-29

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 MITTELSTAEDT RONALD J 2. Issuer Name and Ticker or Trading Symbol Waste Connections, Inc. [ WCN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Executive Officer (Last) (First) (Middle) 3 WATERWAY SQUARE PLACE, SUITE 110 3. Date of Earliest Transaction (MM/DD/YY) 08/29/2018 (Street) THE WOODLANDS, TX77380 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

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 Restricted Share Units $ 0 08/29/2018 J 222 ( 1 ) ( 1 ) Common Shares 222 ( 2 ) $ 0 0 D Restricted Share Units $ 0 08/29/2018 J 66,450 ( 3 ) ( 3 ) Common Shares 66,450 ( 2 ) $ 0 0 D Restricted Share Units $ 0 08/29/2018 J 18,109 ( 4 ) ( 4 ) Common Shares 18,109 ( 2 ) $ 0 18,108 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other MITTELSTAEDT RONALD J 3 WATERWAY SQUARE PLACE SUITE 110 THE WOODLANDS, TX77380 X Chief Executive Officer Signatures Ronald Mittelstaedt 08/31/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The deferred restricted share unit award was granted on 11/12/2010 and vested 25% per year over the four-year period following the date of grant. ( 2 )Reflects the number of restricted share units ("RSUs") no longer deemed to be invested in Issuer's nonqualified deferred compensation plan ("Plan") based on an investment election by Reporting Person on August 29, 2018 to credit value of such RSUs into a measurement fund under the Plan. The value of such RSUs is based on the market value of Issuer's common shares on the election date. Such elections are available during Issuer's open trading windows to participants under the Plan who have attained age 55; and for RSU deferrals such participants have made that (i) are scheduled to be distributed pursuant to a multi-year annual installment method election following participant's separation from service and (ii) have been vested for at least three years prior to the election date, as provided for in Amendment No. 2 to the Plan, dated October 25, 2017. The investment election made by Reporting Person does not alter any distribution dates previously selected under the Plan. ( 3 )The deferred restricted share unit award was granted on 2/11/2011 and vested 25% per year over the four-year period following the date of grant. ( 4 )The deferred restricted share unit award was granted on 2/25/2013 and vested 25% per year over the four-year period following the date of grant.

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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