Ownership Submission
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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(Print or Type Responses)
1. Name and Address of Reporting Person *
VIKING GLOBAL INVESTORS LP
   2. Issuer Name and Ticker or Trading Symbol
Wayfair Inc. [W] 		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)
55 RAILROAD AVENUE		 3. Date of Earliest Transaction (Month/Day/Year)
11/03/2014
(Street)

GREENWICH, CT 06830		 4. If Amendment, Date Original Filed(Month/Day/Year)
 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 (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
Class A Common Stock 11/03/2014   P   1,200 A $ 25.1708 1,751,436 I See Explanation of Responses (1) (2) (3) (4)
Class A Common Stock 11/03/2014   P   1,200 A $ 25.1708 498,611 D (4) (5)  

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

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
VIKING GLOBAL INVESTORS LP
55 RAILROAD AVENUE
GREENWICH, CT 06830		     X    
Viking Long Fund GP LLC
55 RAILROAD AVENUE
GREENWICH, CT 06830		     X    
Viking Long Fund Master Ltd.
55 RAILROAD AVENUE
GREENWICH, CT 06830		     X    
HALVORSEN OLE ANDREAS
55 RAILROAD AVENUE
GREENWICH, CT 06830		     X    
Ott David C.
55 RAILROAD AVENUE
GREENWICH, CT 06830		     X    
Purcell Thomas W. JR
55 RAILROAD AVENUE
GREENWICH, CT 06830		     X    
Sundheim Daniel S.
C55 RAILROAD AVENUE
GREENWICH, CT 06830		     X    

Signatures

 /s/ O. ANDREAS HALVORSEN (6)(7)   11/05/2014
**Signature of Reporting Person Date
 /s/ DAVID C. OTT (6)(7)   11/05/2014
**Signature of Reporting Person Date
 /s/ THOMAS W. PURCELL, JR. (6)(7)   11/05/2014
**Signature of Reporting Person Date
 /s/ DANIEL S. SUNDHEIM (6)(7)   11/05/2014
**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) O. Andreas Halvorsen, David C. Ott, Thomas W. Purcell, Jr. and Daniel S. Sundheim are Executive Committee members of certain management entities including Viking Global Investors LP ("VGI"), Viking Global Performance LLC ("VGP") and Viking Long Fund GP LLC ("VLFGP"). VGI provides managerial services to various investment funds including Viking Global Equities LP ("VGE"), Viking Global Equities II LP ("VGE II") and VGE III Portfolio Ltd. ("VGE III"). VGP is the general partner of VGE and VGE II and the investment manager of VGE III. VLFGP serves as the investment manager of Viking Long Fund Master Ltd. ("VLFM", together with VGE, VGE II and VGE III, the "Viking Funds"; and VLFM together with Mr. Halvorsen, Mr. Ott, Mr. Purcell, Mr. Sundheim, VLFGP and VGI, the "Reporting Persons").
(2) VGI provides managerial services to (i) VGE, which directly holds 99,621 shares of Class A common stock and 327,594 shares of Class B common stock; (ii) VGE II, which directly holds 5,840 shares of Class A common stock and 19,214 shares of Class B common stock; (iii) VGE III, which directly holds 186,679 shares of Class A common stock and 613,877 shares of Class B common stock; and (iv) VLFM, which directly holds 188,310 shares of Class A common stock and 310,301 shares of Class B common stock. Because of the relationships between VGI and the Viking Funds, VGI may be deemed to beneficially own the shares of Class A common stock and Class B common stock directly held by the Viking Funds.
(3) VLFGP serves as the investment manager of VLFM. Because of the relationship between VLFGP and VLFM, VLFGP may be deemed to beneficially own the shares of Class A common stock and Class B common stock directly held by VLFM.
(4) The Reporting Persons disclaim beneficial ownership of these securities except to the extent of their pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purpose.
(5) On November 3, 2014, VLFM acquired 1,200 shares of Class A common stock. Consequently, VLFM directly holds 188,310 shares of Class A common stock and 310,301 shares of Class B common stock.
 
Remarks:
(6) The Reporting Persons are jointly filing this Form 4 pursuant to Rule 16a-3(j) under the Exchange Act.

(7) Each of O. Andreas Halvorsen, David C. Ott, Thomas W. Purcell, Jr. and Daniel S. Sundheim is signing individually and as an Executive Committee Member of Viking Global Partners LLC, on behalf of VIKING GLOBAL INVESTORS LP and as an Executive Committee Member of VIKING LONG FUND GP LLC, on behalf of itself and VIKING LONG FUND MASTER LTD.

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