X0203 3 2011-05-04 0 0001489096 Thermon Group Holdings, Inc. THR 0001200412 SIMMONS BRIAN P 10 SOUTH WACKER DRIVE CHICAGO IL 60606 1 0 1 0 Common Stock 13857025 I By CHS Private Equity V LP, an affiliate of CHS Capital Common Stock 6929 I By CHS Associates V, an affiliate of CHS Capital LLC Mr. Simmons is a member of the Investment Committee of CHS Capital LLC, which is the general partner of CHS Management V, LP, which is the general partner of CHS Private Equity V LP. Mr. Simmons disclaims beneficial ownership of the securities except to the extent of a pecuniary interest therein. Mr. Simmons is a member of the Investment Committee of CHS Capital, LLC, which is the managing partner of CHS Associates V. Mr. Simmons disclaims beneficial ownership of the securities except to the extent of a pecuniary interest therein. /s/ Brian P. Simmons by Sarah Alexander as attorney-in-fact pursuant to attached Power of Attorney 2011-05-04