# EDGAR Filing Document

**Accession Number:** 0001228420
**File Stem:** 0001193125-26-134970
**Filing Date:** 2026-3
**Character Count:** 9310
**Document Hash:** 5b60124f04fbafaf9b2c149a4bf047af
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-134970.hdr.sgml**: 20260331

**ACCESSION NUMBER**: 0001193125-26-134970

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260331

**DATE AS OF CHANGE**: 20260331

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** RETTIG DWIGHT W
- **CENTRAL INDEX KEY:** 0001228420

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43221
- **FILM NUMBER:** 26823480
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** HMH Holding Inc
- **CENTRAL INDEX KEY:** 0002021880
- **STANDARD INDUSTRIAL CLASSIFICATION:** OIL & GAS FILED MACHINERY & EQUIPMENT [3533]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 992746883
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 3300 NORTH SAM HOUSTON PARKWAY EAST
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77032
- **BUSINESS PHONE:** 281-449-2000

**MAIL ADDRESS:**
- **STREET 1:** 3300 NORTH SAM HOUSTON PARKWAY EAST
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77032

## Ex-24

**Exhibit 24**

**POWER OF ATTORNEY**

KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and appoints each of Thomas W. McGee and Cindy Nichols, signing singly, as the undersigned's true and lawful attorney-in-fact, with full power and authority to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)prepare, execute in the undersigned's name and on the undersigned's behalf, and submit to the U.S. Securities and Exchange Commission (the "SEC") a Form ID, including amendments thereto, and any other documents necessary or appropriate to obtain codes and passwords enabling the undersigned to make electronic filings with the SEC of reports required by Section 16(a) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or any rule or regulation of the SEC;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)prepare, execute, deliver and file for and on behalf of the undersigned, in the undersigned's capacity as an officer, director and/or shareholder of HMH Holding Inc. (the "Company"), Forms 3, 4 and 5, or any amendment thereto, in accordance with Section 16(a) of the Exchange Act and the rules promulgated thereunder, and any other forms or reports the undersigned may be required to file in connection with the undersigned's ownership, acquisition or disposition of securities of the Company;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3)do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4 or 5, including any electronic filing thereof, complete and execute any amendment or amendments thereto, and timely file such form with the SEC and any stock exchange or similar authority;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(4)seek or obtain, as the undersigned's representative and on the undersigned's behalf, information on transactions in the Company's securities from any third party, including brokers, employee benefit plan administrators and trustees, and the undersigned hereby authorizes any such person to release any such information to the attorney-in-fact for the undersigned and approves and ratifies any such release of information; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(5)take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by or for, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever required, necessary or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such

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attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request and on behalf of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with, or any liability for the failure to comply with, any provision of Section 16 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until (i) the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned's holdings of and transactions in securities issued by the Company, including at such time that the undersigned is no longer a director, officer or holder of more than 10% of the Company's common stock, (ii) the date that this Power of Attorney is revoked by the undersigned in a signed writing delivered to any of the foregoing attorneys-in-fact or (iii) the date that the applicable attorney-in-fact is no longer employed by the Company or any of its affiliates. For the avoidance of doubt, this Power of Attorney may cease to be in effect for one or more of the attorneys-in-fact named herein while still being in effect for one or more of the other attorneys-in-fact named herein.

IN WITNESS WHEREOF, the undersigned has duly executed this instrument for the uses and purposes herein set forth as of this 26 day of August, 2024.

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| | |
|:---|:---|
| By: | /s/ Dwight W. Rettig |
|  | &nbsp;&nbsp;&nbsp;&nbsp;Dwight W. Rettig |

---

**<u>Notary Acknowledgment</u>**

State of Texas

County of Harris

This instrument was acknowledged before me on August 26, 2024 by Dwight W. Rettig.

[Notary Seal]

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| |
|:---|
| /s/ Cindy Nichols |
| Notary Public's Signature |

---

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

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

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| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>RETTIG DWIGHT W<br><sub>(Last) (First) (Middle)</sub><br>3300 NORTH SAM HOUSTON PARKWAY EAST<br><sub>(Street)</sub><br>HOUSTON, TX 77032<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>HMH Holding Inc [ HMH ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-03-31 | **4. 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>_Chf Admn Officer, GC, Corp Sec_ | **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 |

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## Table I - Non-Derivative Securities Beneficially Owned

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|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |

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## Table II - Derivative Securities Beneficially Owned

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|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |

---

**Remarks:**
Exhibit List: Exhibit 24 - Power of Attorney

**Signature:** /s/ Dwight W. Rettig  
**Date:** 2026-03-31

### 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.**