UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.     )

Filed by the Registrant  ☒                            Filed by a Party other than the Registrant    ☐

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☐	Preliminary Proxy Statement
☐	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☐	Definitive Proxy Statement
☒	Definitive Additional Materials
☐	Soliciting Material Pursuant to §240.14a-12

Extra Space Storage Inc.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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*** Exercise Your Right to Vote *** Important Notice Regarding the Availability of Proxy Materials for the Shareholder Meeting to Be Held on May 18, 2017
		Meeting Information
	EXTRA SPACE STORAGE INC.	Meeting Type: Annual Meeting For holders as of: March 22, 2017 Date: May 18, 2017            Time: 11:00 AM MDT Location:  Extra Space Storage Inc. Corporate Offices 2795 East Cottonwood Parkway Suite 300 Salt Lake City, Utah 84121
		You are receiving this communication because you hold shares in the above named company. This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side). We encourage you to access and review all of the important information contained in the proxy materials before voting.
		See the reverse side of this notice to obtain proxy materials and voting instructions.

—  Before You Vote  —

How to Access the Proxy Materials

Proxy Materials Available to VIEW or RECEIVE:

1. Notice & Proxy Statement      2. Annual Report on form 10K

How to View Online:

Have the information that is printed in the box marked by the arrow (located on the following page) and visit: www.proxyvote.com.

How to Request and Receive a PAPER or E-MAIL Copy:

If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:

1) BY INTERNET:            www.proxyvote.com

2) BY TELEPHONE:        1-800-579-1639

3) BY E-MAIL*:                sendmaterial@proxyvote.com

*  If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow (located on the following page) in the subject line.

Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before May 04, 2017 to facilitate timely delivery.

—  How To Vote  —

Please Choose One of the Following Voting Methods

	Vote In Person: If you choose to vote these shares in person at the meeting, you must request a “legal proxy.” To do so, please follow the instructions at www.proxyvote.com or request a paper copy of the materials, which will contain the appropriate instructions. Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance.
	Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow available and follow the instructions.
	Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a voting instruction form.
		.

Voting items

	The Board of Directors recommends you vote FOR the following proposal(s):		The Board of Directors recommends you vote 1 YEAR on the following proposal:
	1.	Election of Directors Nominees	4.	Advisory vote on frequency of stockholder vote on executive compensation.
	1A	Kenneth M. Woolley
	1B	Joseph D. Margolis
	1C	Roger B. Porter
	1D	Spencer F. Kirk
	1E	Dennis J. Letham
	1F	Diane Olmstead
	1G	K. Fred Skousen
	The Board of Directors recommends you vote FOR the following proposal(s):
	2.	Ratification of the appointment of Ernst & Young LLP as the Company’s Independent Registered Public Accounting Firm.
	3.	Advisory vote on the compensation of the Company’s named executive officers.

        

Voting items Continued Reserved for Broadridge Internal Control Information  

  NOTE:   To vote and otherwise represent the undersigned on any other matter that may properly come before the meeting or any adjournments or postponements thereof in the discretion of the proxy holder.  

Voting Instructions

     THIS SPACE RESERVED FOR LANGUAGE PERTAINING TO BANKS AND BROKERS AS REQUIRED BY THE NEW YORK STOCK EXCHANGE