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

ECHELON CORPORATION

(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 Stockholder Meeting to Be Held on <mtgdate> May 17, 2018 .ECHELON CORPORATIONE chelon Corporation c/o Computershare 480 Washington Blvd. Jersey City, NJ 07310 Investor Address Line 1 1 Investor Address Line 2 15 12 Investor Address Line 3 OF Investor Address Line 4 Investor Address Line 5 2 John Sample 1234 ANYWHERE STREETANY CITY, ON A1A 1A1 Meeting Information Meeting Type: Annual <mtgtype> Meeting For holders as of: March <recdate> 19, 2018 Date: May 17, 2018 Time: 10:00 <mtgtime> AM PDT Location: 2901 Patrick Henry Dr. Santa Clara, CA 95054You 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. Broadridge Internal Use Only Job #Envelope #Sequence ## of # Sequence #0000365211_1 R1.0.1.17

Before You Vote How to Access the Proxy Materials Proxy Materials Available to VIEW or RECEIVE: 1. Notice & Proxy Statement 2. Annual Report 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.com2) BY TELEPHONE: 1-800-579-16393) 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 03, 2018 to facilitate timely delivery. How To Vote Please Choose One of the Following Voting Methods Vote In Person: Many stockholder 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. At the meeting, you will need to request a ballot to vote these shares. 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 proxy card. Internal Use Only 0000365211_2 R1.0.1.17

Voting items The Board of Directors recommends you vote FOR the following: 1. Election of Directors Nominees 01 Robert J. Finocchio, Jr 02 A. C. Markkula, Jr. 03 Robert R. Maxfield The Board of Directors recommends you vote FOR proposals 2. and 3..2. To ratify the appointment of Armanino LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2018.3. To ratify the Tax Benefit Preservation Plan, as amended. NOTE: Such other business as may properly come before the meeting or any adjournment thereof. B A R C O D E Broadridge Internal Use Only xxxxxxxxxx xxxxxxxxxx Cusip Job # Envelope # Sequence # # of # Sequence #0000365211_3 R1.0.1.17