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Your Vote Counts! Get informed before you vote View the Notice of Proxy Statement, Annual Report,1234567890123456789012345678901234567890, 1234567890123456789012345678901234567890, 1234567890123456789012345678901234567890, 1234567890123456789012345678901234567890 online OR you can receive a free paper copy of voting material(s) by requesting prior to <matcutoff>. If you would like to request a copy of the voting material(s), you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email tosendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Smartphone users Point your camera here and vote without entering a control number For complete information and to vote, visit www.ProxyVote.comControl #FLASHID-JOB#Ricky Campana P.O. Box 123456Suite 50051 Mercedes Way Edgewood, NY 117171 OF 2322,224148,29430#XXXX XXXX XXXX XXXXTHERMON GROUP HOLDINGS, INC.2021 Annual Meeting Vote by August 01, 202111:59 PM ETTHERMON GROUP HOLDINGS, INC.C/O BROADRIDGE CORPORATE ISSUER SERVICES INC.P.O. BOX 1342BRENTWOOD, NY 11717You invested in THERMON GROUP HOLDINGS, 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 stockholder meeting to be held on August 02, 2021.& Proxy Statement, 10K Wrap online OR you can receive a free paper or email copy of the material(s) by requesting prior to July 19, 2021. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. Vote in Person at the Meeting*August 02, 202111:30 AM CDT100 Thermon Drive San Marcos, Texas 78666*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 at www.ProxyVote.comPrefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”. Voting Items Board Recommends FLASHID-JOB#Control # XXXX XXXX XXXX XXXXTHE COMPANY NAME INC. - COMMON ASDFGHJKL 123456789.1234THE COMPANY NAME INC. - CLASS A 123456789.1234THE COMPANY NAME INC. - CLASS B 123456789.1234THE COMPANY NAME INC. - CLASS C 123456789.1234THE COMPANY NAME INC. - CLASS D 123456789.1234THE COMPANY NAME INC. - CLASS E 123456789.1234THE COMPANY NAME INC. - CLASS F 123456789.1234THE COMPANY NAME INC. - 401 K 123456789.1234SHARE CLASSES REPRESENTED FOR VOTING This is an overview of the proposals being presented at the upcoming stockholder meeting. Please follow the instructions on the reverse side to vote these important matters.1. Election of DirectorsNominees:01) John U. Clarke 04) Marcus J. George 07) Bruce A. Thames02) Linda A. Dalgetty 05) Kevin J. McGinty03) Roger L. Fix 06) John T. Nesser, IIIFor2. To ratify the appointment of KPMG LLP as the Company's independent registered public accounting firm for the fiscal year ending March 31, 2022. For3. To approve, on a non-binding advisory basis, the compensation of the Company's executive officers as described in the Proxy Statement. For NOTE: Such other business as may properly come before the meeting or any adjournment thereof.


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