UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934 (Amendment No.     )

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☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material Pursuant to §240.14a-12

MEDPACE HOLDINGS, 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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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:  0000328443_1 R1.0.1.15  MEDPACE HOLDINGS, INC.  Medpace Holdings, Inc.  5375 Medpace Way  Cincinnati, Ohio 45227  Annual Meeting  March 27, 2017  May 19, 2017  May 19, 2017 9:00 AM EDT  5375 Medpace Way  Cincinnati, OH 45227  

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.  .  .  0000328443_2 R1.0.1.15  1. Annual Report 2. Notice & Proxy Statement  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 07, 2017 to facilitate timely delivery.  

Voting items  0000328443_3 R1.0.1.15  The Board of Directors recommends you vote  FOR the following:  1. Election of Directors  Nominees  01 Bruce Brown 02 Brian T. Carley 03 Robert O. Kraft  The Board of Directors recommends you vote FOR the following proposal:  2. To ratify the appointment of Deloitte & Touche LLP as our independent registered public accounting firm for  the year ending December 31, 2017.  NOTE: To transact such other business as may properly come before the meeting or any continuation, postponement,  or adjournment thereof.  

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