Washington, DC 20549


(Rule 14a-101)

Schedule 14A Information

Proxy Statement Pursuant to Section 14(a)

of the Securities Exchange Act of 1934

(Amendment No.     )

Filed by the Registrant x

Filed by a Party other than the Registrant ¨

Check the appropriate box:


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

DexCom, Inc.

(Name of Registrant as Specified in its Charter)

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

Payment of Filing Fee (Check the appropriate box):


x No fee required.


¨ Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.


  (1) Title of each class of securities to which transaction applies:




  (2) Aggregate number of securities to which transaction applies:




  (3) Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):




  (4) Proposed maximum aggregate value of transaction:




  (5) Total fee paid:





¨ Fee paid previously with preliminary materials.


¨ Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.


  (1) Amount Previously Paid:




  (2) Form, Schedule or Registration Statement No.:




  (3) Filing Party:




  (4) Date Filed:




   *** Exercise Your Right to Vote ***     

Important Notice Regarding the Availability of Proxy Materials for the

Stockholder Meeting to Be Held on May 19, 2016


             Meeting Information       
   DEXCOM, INC.       


Meeting Type:         Annual Meeting

             For holders as of:    March 30, 2016       
             Date: May 19, 2016        Time: 2:00 PM PDT       





Location:  DexCom, Inc.

                  6310 Sequence Drive

                  San Diego, CA 92121



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 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


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— Before You Vote —

How to Access the Proxy Materials




Proxy Materials Available to VIEW or RECEIVE:

1. Notice & Proxy Statement and Annual Report         2. 10K WRAP

How to View Online:

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

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:


2) BY TELEPHONE:     1-800-579-1639

3) BY E-MAIL*:   

* 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 LOGO   (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 05, 2016 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 Have the information that is printed in the box marked by the arrow LOGO   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



  Voting items          LOGO


The Board of Directors recommends you vote FOR the following:



Election of Directors






Steven R. Altman



Barbara E. Kahn



Jay S. Skyler



The Board of Directors recommends you vote FOR proposals 2 and 3.






To ratify the selection by the audit committee of our Board of Directors of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2016.



Advisory resolution to approve executive compensation.

  NOTE: Such other business as may properly come before the meeting or any adjournment thereof.            



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      Reserved for Broadridge Internal Control Information                  
   THE COMPANY NAME INC. - COMMON                                                                                                         123,456,789,012.12345         
   THE COMPANY NAME INC. - CLASS A                                                                                                            123,456,789,012.12345         
   THE COMPANY NAME INC. - CLASS B                                                                                                            123,456,789,012.12345         
   THE COMPANY NAME INC. - CLASS C                                                                                                            123,456,789,012.12345         
   THE COMPANY NAME INC. - CLASS D                                                                                                            123,456,789,012.12345         
   THE COMPANY NAME INC. - CLASS E                                                                                                            123,456,789,012.12345         
   THE COMPANY NAME INC. - CLASS F                                                                                                            123,456,789,012.12345         
   THE COMPANY NAME INC. - 401 K                                                                                                                  123,456,789,012.12345         






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