Sec Form 4 Filing - WARBURG PINCUS & CO. @ AVALARA, INC. - 2019-02-19

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

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person WARBURG PINCUS & CO. 2. Issuer Name and Ticker or Trading Symbol AVALARA, INC. [ AVLR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 450 LEXINGTON AVENUE, 3. Date of Earliest Transaction (MM/DD/YY) 02/19/2019 (Street) NEW YORK, NY10017 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ 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 02/19/2019 S 4,465,000 D $ 49.03 8,797,002 I See Footnotes ( 1 ) ( 2 ) ( 3 ) Common Stock 02/19/2019 S 235,000 D $ 49.03 462,987 I See Footnotes ( 1 ) ( 2 ) ( 4 )

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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other WARBURG PINCUS & CO. 450 LEXINGTON AVENUE NEW YORK, NY10017 X KAYE CHARLES R C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK, NY10017 X Landy Joseph P. C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK, NY10017 X Signatures WARBURG PINCUS & Co.by Robert B. Knauss, Partner,/s/ Robert B. Knauss 02/21/2019 Signature of Reporting Person Date See Exhibit 99.1 for signatures of other Reporting Owners 02/21/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Warburg Pincus Private Equity XI, L.P. ("WPXI") holds shares through its subsidiary, WPXI Finance, LP ("WPXIF"). Warburg Pincus XI Partners, L.P. ("WPXI Partners") also holds shares and together with WPXI is referred to as the "WPXI Funds." WPXI GP, L.P. ("WPXIF GP") is the managing general partner of WPXIF. WPXI is the general partner of WPXIF GP. Warburg Pincus XI, L.P. ("WP XI GP") is the general partner of each of WPXI and WPXI Partners. WP Global LLC ("WP Global") is the general partner of WP XI GP. Warburg Pincus Partners II, L.P. ("WPP II") is the managing member of WP Global. Warburg Pincus Partners GP LLC ("WPP GP LLC") is the general partner of WPP II. Warburg Pincus & Co. ("WP") is the managing member of WPP GP LLC. Warburg Pincus LLC ("WP LLC") is the manager of the WPXI Funds. ( 2 )(Continued from Footnote 1) Charles R. Kaye and Joseph P. Landy are each Managing General Partners of WP and Managing Members and Co-Chief Executive Officers of WP LLC and may be deemed to control the Warburg Pincus entities. Messrs. Kaye and Landy disclaim beneficial ownership of all shares held by the WPXI Funds entities. Mr. Sadrian, a director of the Issuer, is a Partner of WP and a Member and Managing Director of WP LLC. ( 3 )Shares held by WPXI through its subsidiary WPXIF. Each of WPXIF GP, WPXI Partners, WP XI GP, WP Global, WPP II, WPP GP LLC, WP and WP LLC, and Messrs. Kaye, Landy and Sadrian disclaim beneficial ownership of such securities, except to the extent of its or his pecuniary interest therein, if any. ( 4 )Shares held directly by WPXI Partners. Each of WPXI, WPXIF, WPXIF GP, WP XI GP, WP Global, WPP II, WPP GP LLC, WP, WP LLC, and Messrs. Kaye, Landy and Sadrian disclaim beneficial ownership of such securities, except to the extent of its or his pecuniary interest therein, if any.

Remarks: Form 2 of 2. Two reports are filed that relate to the same transactions. See Form 1 of 2 for additional reporting owners.Exhibit 99.1 list of reporting owners and signature page filed herewith.

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).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.