# EDGAR Filing Document

**Accession Number:** 0001489096
**File Stem:** 0000905148-26-002791
**Filing Date:** 2026-6
**Character Count:** 10329
**Document Hash:** b2468b102f7294d3167a4f319d902895
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000905148-26-002791.hdr.sgml**: 20260603

**ACCESSION NUMBER**: 0000905148-26-002791

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260601

**FILED AS OF DATE**: 20260603

**DATE AS OF CHANGE**: 20260603

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Harris-Peterson Candace
- **CENTRAL INDEX KEY:** 0001777558

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35159
- **FILM NUMBER:** 261059602

**MAIL ADDRESS:**
- **STREET 1:** 7171 SOUTHWEST PARKWAY
- **STREET 2:** BUILDING 300, SUITE 200
- **CITY:** AUSTIN
- **STATE:** TX
- **ZIP:** 78735
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Thermon Group Holdings, Inc.
- **CENTRAL INDEX KEY:** 0001489096
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRICAL INDUSTRIAL APPARATUS [3620]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 272228185
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0331

**BUSINESS ADDRESS:**
- **STREET 1:** 7171 SOUTHWEST PARKWAY
- **STREET 2:** BUILDING 300, SUITE 200
- **CITY:** AUSTIN
- **STATE:** TX
- **ZIP:** 78735
- **BUSINESS PHONE:** 5126900600

**MAIL ADDRESS:**
- **STREET 1:** 7171 SOUTHWEST PARKWAY
- **STREET 2:** BUILDING 300, SUITE 200
- **CITY:** AUSTIN
- **STATE:** TX
- **ZIP:** 78735

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[x] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Harris-Peterson Candace<br><sub>(Last) (First) (Middle)</sub><br>7171 SOUTHWEST PARKWAY<br>BUILDING 300, SUITE 200<br><sub>(Street)</sub><br>AUSTIN, TX 78735<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-06-01 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_SVP, Human Resources_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Thermon Group Holdings, Inc. [ THR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2026-06-01 |  | A |  | 13556<sup>(1)(2)(3)</sup> | A | <sup>(1)(2)(3)</sup> | 52063<sup>(5)(6)</sup> | D |  |
| Common Stock | 2026-06-01 |  | D |  | 52063<sup>(1)(4)(5)(6)</sup> | D | <sup>(1)(4)(5)(6)</sup> | 0 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Stock Option (Right to Buy) | $14.28 | 2026-06-01 |  | D |  |  | 3247 | 2023-06-01 | 2030-06-01 | Common Stock | 3247 | <sup>(1)(7)</sup> | 0 | D |  |

---

### Footnotes:

(1) Pursuant to the terms of the Agreement and Plan of Merger dated February 23, 2026 (the "Merger Agreement") by and among the Issuer, CECO Environmental Corp ("CECO"), and two wholly-owned merger subsidiaries of CECO (the "Merger Subs"), the Issuer merged with the two Merger Subs to become a wholly-owned subsidiary of CECO (the "Merger").

(2) Represents shares underlying Issuer performance unit awards ("PU awards") that vested in accordance with the terms of the Merger Agreement immediately prior to the effective time of the Merger.

(3) The number of shares of Issuer common stock deemed subject to each Issuer PU award was determined as follows: (a) for any completed performance period, based on actual achievement of the applicable performance-based vesting conditions; (b) for any performance period in which the effective time of the Merger occurred (i.e., the performance period was not yet completed and performance goals had been established), based on the greater of target performance and actual performance as of the effective time of the Merger (with performance goals and achievement thereof equitably adjusted as necessary to reflect a shortened performance period); and (c) for any performance period for which performance goals had not yet been established, based on target performance.

(4) Pursuant to the terms of the Merger Agreement, each share of Issuer common stock (other than excluded and dissenting shares) was converted into the right to receive, at the election of the holder, one of the following forms of merger consideration, subject to proration as described in the Merger Agreement: (i) 0.6840 shares of CECO common stock and $10.00 in cash, without interest (the "mixed consideration"), which is the default election; (ii) $63.89 in cash, without interest (the "cash consideration"); or (iii) 0.8110 shares of CECO common stock (the "stock consideration"). The reporting person elected the cash consideration for their shares of Issuer common stock.

(5) Includes 9,736 shares of Issuer common stock underlying Issuer restricted stock unit awards ("RSU awards") held by the reporting person. Pursuant to the terms of the Merger Agreement, each outstanding Issuer RSU award was automatically assumed by CECO and converted into a CECO RSU award with respect to a number of shares of CECO common stock (rounded down to the nearest whole share) equal to the product of (a) the number of shares of Issuer common stock subject to such Issuer RSU award immediately prior to the effective time of the Merger and (b) 0.8110. Each such converted CECO RSU award is otherwise subject to the same terms and conditions (including vesting or forfeiture) as applied to the corresponding Issuer RSU award immediately prior to the effective time of the Merger, except as otherwise required by applicable law.

(6) Includes 13,556 shares of Issuer common stock underlying Issuer PU awards held by the reporting person. Pursuant to the terms of the Merger Agreement, each outstanding Issuer PU award was automatically assumed by CECO and converted into a CECO RSU award with respect to a number of shares of CECO common stock (rounded down to the nearest whole share) equal to the product of (a) the number of shares of Issuer common stock subject to such Issuer PU award immediately prior to the effective time of the Merger (determined in accordance with the formula set forth in footnote 3) and (b) 0.8110. Each such converted CECO RSU award is subject to the same terms and conditions (including any time-based vesting and forfeiture provisions and, as applicable, dividend equivalent rights) as applied to the corresponding Issuer PU award immediately prior to the effective time of the Merger, except as otherwise required by applicable law, but is no longer subject to performance-based vesting conditions.

(7) Pursuant to the terms of the Merger Agreement, each outstanding Issuer option with an exercise price per share of less than $63.89, whether or not vested or exercisable, was cancelled at the effective time of the Merger and converted into the right to receive a cash payment (without interest, and less applicable tax withholdings) equal to the product of (a) the number of shares of Issuer common stock subject to such option immediately prior to the effective time of the Merger, multiplied by (b) the excess of $63.89 over the exercise price per share of such option.

**Signature:** /s/ Ryan Tarkington, Attorney-in-Fact  
**Date:** 2026-06-03

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (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).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**