Company: NINE
Filing Date: 2025-03-06
Form Type: DEFA14A
Source: 0001193125-25-048518
Chunk: 1

Company: Nine Energy Service, Inc.
Filing Date: 2025-03-06
Form: DEFA14A
Chunk 1
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oting/RequestMaterials TO VOTE: ONLINE: To access your online proxy card, please visit www.voteproxy.com and follow the on-screeninstructions or scan the QR code with your smartphone. You may enter your voting instructions at ***.voteproxy.com up until 11:59 PM Eastern Time the day before the cut-offor meeting date. IN PERSON: You may vote your shares in person by attending the Annual Meeting. TELEPHONE: To vote by telephone, please visit www.voteproxy.com to view the materials and to obtain the toll free number to call. MAIL: You may request a card by following the instructions above.1. Election of Class I Directors 2. Ratification of the appointment of PricewaterhouseCoopers LLP as the independentregistered public accounting firm of the Company for the fiscal year ending December NOMINEES: 31, 2025 Darryl K WillisJulie A Peffer 3. Approval, on an advisory basis, of the compensation of our named executive officers 4. Approval of the Third Amendment to the 2011 Stock Incentive Plan THE BOARD OF DIRECTORS RECOMMENDS A VOTE “FOR” ELECTION OF THESE NOMINEES FOR DIRECTOR IN PROPOSAL 1, A VOTE “FOR” PROPOSAL 2, A VOTE “FOR” PROPOSAL 3 AND A VOTE “FOR” PROPOSAL 4. Please note that you cannot use this notice to vote by mail.

Your Vote Counts! NINE ENERGY SERVICE, INC. 2025 Annual Meeting Vote by May 01, 2025 11:59 PM ET Hextone, Inc. P.O. Box 91421 Farmingdale, NY 11735 148,294 322,224 OF 2Ricky Campana P.O. Box 123456 Suite 500 30

# 51 Mercedes Way Edgewood, NY 11717 FLASHID-JOB#You invested in NINE ENERGY SERVICE, INC. and it’s time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy material for the shareholder meeting to be held on May 02, 2025. Get informed before you vote View the Notice & Proxy Statement, Annual Report online OR you can receive a free paper or email copy of the material(s) by requesting prior to April 20, 2025. If