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  ☐

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

☒ Definitive Additional Materials

☐ Soliciting Material Pursuant to §240.14a-12

SEAWORLD ENTERTAINMENT, 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):

☒ 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:

See the reverse side of this notice to obtain  proxy materials and voting instructions.  *** Exercise Your Right to Vote ***  Important Notice Regarding the Availability of Proxy Materials for the  Stockholder Meeting to Be Held on <mtgdate>.  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.  Meeting Information  Meeting Type: <mtgtype>  For holders as of: <recdate>  Date: Time: <mtgtime>  Location:  0000459652_1 R1.0.1.18  SEAWORLD ENTERTAINMENT, INC.  SEAWORLD ENTERTAINMENT, INC.  6240 SEA HARBOR DRIVE  ORLANDO, FL 32821  Annual Meeting  April 15, 2020  June 10, 2020  June 10, 2020 11:00 AM EDT  Meeting live via the Internet - please visit  www.virtualshareholdermeeting.com/SEAS2020

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.  How To Vote  .  Before You Vote  How to Access the Proxy Materials  Proxy Materials Available to VIEW or RECEIVE:  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.  .  .  0000459652_2 R1.0.1.18  1. Proxy Statement 2. Annual Report  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 27, 2020 to facilitate timely delivery.

Voting items  0000459652_3 R1.0.1.18  The Board of Directors recommends  you vote FOR the following:  1. To elect the eight director  nominees.  Nominees  1a. Ronald Bension  1b. James Chambers  1c. William Gray  1d. Charles Koppelman  1e. Yoshikazu Maruyama  1f. Thomas E. Moloney  1g. Neha Jogani Narang  1h. Scott I. Ross  2. Ratification of the appointment of  Deloitte & Touche LLP as our independent  registered public accounting firm for  2020.  3. Approval, in a non-binding advisory  vote, of the compensation paid to the  named executive officers.  The Board of Directors recommends you  vote 1 YEAR on the following proposal:  4. Determination, in a non-binding advisory  vote, whether a non-binding stockholder  vote to approve the compensation paid to  our named executive officers should  occur every one, two or three years.  NOTE: To consider such other business as may  properly come before the Annual Meeting and  any adjournments or postponements thereof.

0000459652_4 R1.0.1.18