FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  THOMPSON STREET CAPITAL PARTNERS II L P
 2. Date of Event Requiring Statement (Month/Day/Year)
05/04/2011		 3. Issuer Name and Ticker or Trading Symbol
Thermon Group Holdings, Inc. [THR]
(Last)
(First)
(Middle)
120 S. CENTRAL AVENUE, SUITE 600		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

ST. LOUIS, MO 63105		 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Class A Common Stock   (1)   (1) Common Stock 4,811,467 $ (1) D (2)  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
THOMPSON STREET CAPITAL PARTNERS II L P
120 S. CENTRAL AVENUE
SUITE 600
ST. LOUIS, MO 63105		     X    
Thompson Street Capital Partners II GP, L.P.
120 S. CENTRAL AVENUE
SUITE 600
ST. LOUIS, MO 63105		     X    
Thompson Street Capital LLC
120 S. CENTRAL AVENUE
SUITE 600
ST. LOUIS, MO 63105		     X    

Signatures

/s/ James A. Cooper 05/04/2011
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The Class A Common Stock is convertible into common stock on a one for one basis immediately prior to the consummating of an underwritten initial public offering and has no expiration date.
(2) Thompson Street Capital Partners II, GP, L.P. is the general partner of Thompson Street Capital Partners II, L.P. Thompson Street Capital LLC is the general partner of Thompson Street Capital II GP, L.P. Each of Thompson Street Capital Partners II GP, L.P. and Thompson Street Capital LLC beneficially owns the reported securities indirectly, but disclaims beneficial ownership of the reported securities except to the extent of its pecuniary interest therein.

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