X0303 4 2011-05-10 1 0001489096 Thermon Group Holdings, Inc. THR 0001200412 SIMMONS BRIAN P 10 SOUTH WACKER DRIVE CHICAGO IL 60606 0 0 1 0 Common Stock 2011-05-10 4 S 0 4305008 11.16 D 9522017 I See Footnote Common Stock 2011-05-10 4 S 0 2153 11.16 D 4776 I See Footnote This amount represents the $12.00 initial public offering price per share less the underwriting discount of $0.84 per share. These shares are owned directly by CHS Private Equity V LP. 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. Hennessy disclaims beneficial ownership of the securities except to the extent of a pecuniary interest therein. /s/ Brian P. Simmons by Sarah Alexander, attorney-in-fact pursuant to power of attorney dated 4/26/2011 2011-05-11