Triumph (TGI) DEFA14A Additional proxy soliciting materials

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.     )
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Triumph Group, Inc.
(Name of Registrant as Specified In Its Charter)
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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 July 11, 2018 TRIUMPH GROUP, INC. 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. TRIUMPH GROUP, INC. 899 Cassatt Road, Suite 210 Berwyn, PA 19312 0000383920_1 R1.0.1.17 See the reverse side of this notice to obtain proxy materials and voting instructions. Meeting Information Meeting Type: Annual Meeting For holders as of: May 17, 2018 Date: July 11, 2018Time: 9:00 AM EDT Location: Armed Forces Benefit Association The Charles C. Blanton Building 909 North Washington Street Alexandria, VA 22314

Before You Vote How to Access the Proxy Materials Proxy Materials Available to VIEW or RECEIVE: Have the information that is printed in the box marked by the arrow (located on the by the arrow (located on the following page) in the subject line. How To Vote Please Choose One of the Following Voting Methods possession available and follow the instructions. marked by the arrow 0000383920_2 R1.0.1.17 Vote In Person: Many stockholder meetings have attendance requirements including, but not limited to, the of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any specia 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 Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card. l 1. Notice & Proxy Statement2. Form 10-K3. Annual Report How to View Online: 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 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 June 27, 2018 to facilitate timely delivery.

The Board of Directors recommends you vote FOR the following nominees: 1. 01 Election of Directors Nominees Paul Bourgon 4. To ratify the selection of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending March 31, 2019. 02 Daniel J. Crowley 03 Ralph E. Eberhart The Board of Directors recommends you vote AGAINST proposal 5: 04 Daniel P. Garton 5. Stockholder proposal to reduce the threshold to call special stockholder meetings to 10% of outstanding shares. 05 Dawne S. Hickton 06 William L. Mansfield NOTE: At their discretion, the named proxies are authorized to consider and vote upon other business as may properly come before the meeting or any postponements or adjournments thereof. 07 Adam J. Palmer 08 Joseph M. Silvestri 09 Larry O. Spencer The Board of Directors recommends you vote FOR proposals 2, 3 and 4. 2. To approve, by advisory vote, the compensation paid to our named executive officers for fiscal year 2018. 3. To approve the Triumph Group, Inc. 2018 Equity Incentive Plan. 0000383920_3 R1.0.1.17 Voting items

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