FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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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(Print or Type Responses)

1. Name and Address of Reporting Person *   Neary James 2. Date of Event Requiring Statement (Month/Day/Year) 07/05/2016 3. Issuer Name and Ticker or Trading Symbol WEX Inc. [WEX] (Last) (First) (Middle) C/O WARBURG PINCUS LLC, 450 LEXINGTON AVENUE 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) NEW YORK, NY 10017 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock, $0.01 par value per share ("Common Stock") 4,011,672 I See explanation of responses (1) (2) (3) (4) (5) (6) (7)

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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Neary James C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK, NY 10017	  X	Â	Â	Â

Signatures

/s/ James C. Neary		07/15/2016
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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)	This Form 3 is being filed in connection with the issuance of shares of Common Stock of WEX Inc. (the "Issuer") pursuant to the Unit Purchase Agreement, dated October 18, 2015, by and among (i) the Issuer, (ii) Mustang HoldCo 1 LLC ("Mustang Holdco"), Warburg Pincus Private Equity (E&P) XI - B, L.P., Warburg Pincus Private Equity XI-C, L.P., WP XI Partners, L.P., Warburg Pincus Private Equity XI-B, L.P., WP Mustang Co-Invest-B L.P ("WP Co-Invest-B"), WP Mustang Co-Invest-C L.P. ("WP Co-Invest-C"), Warburg Pincus XI (E&P) Partners - B, L.P. ("WP XI E&P Partners-B"), Warburg Pincus (E&P) XI, L.P. ("WP E&P XI GP") (all of the entities listed in clause (ii) and this clause (iii), the "Sellers"), (iv) WP Mustang Topco LLC, and (v) Warburg Pincus Private Equity XI (Lexington), LLC.
(2)	As of July 1, 2016, Mustang Holdco is the holder of 4,011,672 shares of Common Stock of the Issuer.
(3)	The unitholders of Mustang Holdco include Warburg Pincus Private Equity (Lexington) XI - A, L.P. ("WP XI Lexington-A"), WP (Lexington) Holdings II, L.P. ("WP Lexington II"), Warburg Pincus XI (Lexington) Partners - A, L.P. ("WP XI Lexington Partners-A"), WP XI E&P Partners-B, WP Mustang Co-Invest LLC ("WP Co-Invest LLC"), WP Co-Invest-B, and WP Co-Invest-C.
(4)	WP E&P XI GP is (i) the general partner of WP XI Lexington-A, WP Lexington II, WP XI Lexington Partners-A, and WP XI E&P Partners-B, and (ii) the managing member of WP Co-Invest LLC. Warburg Pincus (E&P) XI LLC ("WP E&P XI LLC") is the general partner of WP E&P XI GP. Warburg Pincus Partners (E&P) XI LLC ("WPP E&P XI") is the sole member of WP E&P XI LLC. Warburg Pincus Partners II (US), L.P. ("WP Partners II US") is the managing member of WPP E&P XI. Warburg Pincus & Company US, LLC ("WP & Company US") is the general partner of WP Partners II US. Warburg Pincus LLC ("WP LLC") is the manager of WP XI Lexington-A, WP Lexington II, WP XI Lexington Partners-A, and WP XI E&P Partners-B.
(5)	Warburg Pincus (Bermuda) XI, Ltd. ("WP Bermuda XI") is the general partner of WP Co-Invest-B and WP Co-Invest-C. Warburg Pincus Partners II (Cayman), L.P. ("WPP II Cayman") is the sole shareholder of WP Bermuda XI. Warburg Pincus (Bermuda) Private Equity GP Ltd. ("WP Bermuda GP") is the general partner of WPP II Cayman.
(6)	James C. Neary, the reporting person, who became a director of the Issuer on July 5, 2016, is a Member of WP & Company US and a Managing Director and Member of WP LLC. As such, Mr. Neary may be deemed to have an indirect pecuniary interest (within the meaning of Rule 16a-1 under the Securities Exchange Act of 1934, as amended (the "Exchange Act")) in an indeterminate portion of the securities reported as beneficially owned by Mustang Holdco. Mr. Neary disclaims beneficial ownership of such securities, except to the extent of any direct pecuniary interest therein. Mr. Neary does not directly own any shares of Common Stock in the Issuer as of the date of this filing.
(7)	As of the date of this filing, this Form 3 shall not be deemed an admission that any reporting person or any other person referred to herein is a beneficial owner of any securities of the Issuer for purposes of Section 16 of the Exchange Act, or for any other purpose, or that any reporting person, or other person has an obligation to file this Form 3.

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