# EDGAR Filing Document

**Accession Number:** 0002110029
**File Stem:** 0001193125-26-271482
**Filing Date:** 2026-6
**Character Count:** 15605
**Document Hash:** 81f8d1d41a4e9f38640806f234aea7aa
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-271482.hdr.sgml**: 20260615

**ACCESSION NUMBER**: 0001193125-26-271482

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260611

**FILED AS OF DATE**: 20260615

**DATE AS OF CHANGE**: 20260615

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** EIF ER Holdings LLC
- **CENTRAL INDEX KEY:** 0002138540

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43339
- **FILM NUMBER:** 261092525

**BUSINESS ADDRESS:**
- **STREET 1:** 600 THIRD AVENUE
- **STREET 2:** 38TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10016
- **BUSINESS PHONE:** 2128999700

**MAIL ADDRESS:**
- **STREET 1:** 600 THIRD AVENUE
- **STREET 2:** 38TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10016
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Energy Impact Partners LLC
- **CENTRAL INDEX KEY:** 0002138137

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43339
- **FILM NUMBER:** 261092527

**BUSINESS ADDRESS:**
- **STREET 1:** 600 THIRD AVENUE
- **STREET 2:** 38TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10016
- **BUSINESS PHONE:** 2128999700

**MAIL ADDRESS:**
- **STREET 1:** 600 THIRD AVENUE
- **STREET 2:** 38TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10016
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Energy Impact Fund (FT-D) LP
- **CENTRAL INDEX KEY:** 0002138969

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43339
- **FILM NUMBER:** 261092523

**BUSINESS ADDRESS:**
- **STREET 1:** 600 THIRD AVENUE
- **STREET 2:** 38TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10016
- **BUSINESS PHONE:** 2128999700

**MAIL ADDRESS:**
- **STREET 1:** 600 THIRD AVENUE
- **STREET 2:** 38TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10016
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Energy Impact Fund (FT-B) LP
- **CENTRAL INDEX KEY:** 0002138898

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43339
- **FILM NUMBER:** 261092524

**BUSINESS ADDRESS:**
- **STREET 1:** 600 THIRD AVENUE
- **STREET 2:** 38TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10016
- **BUSINESS PHONE:** 2128999700

**MAIL ADDRESS:**
- **STREET 1:** 600 THIRD AVENUE
- **STREET 2:** 38TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10016
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** EIP Flagship Fund I ER Holdings LLC
- **CENTRAL INDEX KEY:** 0002138967

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43339
- **FILM NUMBER:** 261092526

**BUSINESS ADDRESS:**
- **STREET 1:** 600 THIRD AVENUE
- **STREET 2:** 38TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10016
- **BUSINESS PHONE:** 2128999700

**MAIL ADDRESS:**
- **STREET 1:** 600 THIRD AVENUE
- **STREET 2:** 38TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10016
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ERock, Inc.
- **CENTRAL INDEX KEY:** 0002110029
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRICAL INDUSTRIAL APPARATUS [3620]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 1113 VINE ST.
- **STREET 2:** SUITE 101
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77002
- **BUSINESS PHONE:** 713.429.4091

**MAIL ADDRESS:**
- **STREET 1:** 1113 VINE ST.
- **STREET 2:** SUITE 101
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77002

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Enchanted Rock, Inc.
- **DATE OF NAME CHANGE:** 20260206

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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>Energy Impact Partners LLC<br><sub>(Last) (First) (Middle)</sub><br>600 THIRD AVENUE, 38TH FLOOR<br><sub>(Street)</sub><br>NEW YORK, NY 10016<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-06-11 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>ERock, Inc. [ EROC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>EIP Flagship Fund I ER Holdings LLC<br><sub>(Last) (First) (Middle)</sub><br>600 THIRD AVENUE, 38TH FLOOR<br><sub>(Street)</sub><br>NEW YORK, NY 10016<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-06-11 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>ERock, Inc. [ EROC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>EIF ER Holdings LLC<br><sub>(Last) (First) (Middle)</sub><br>600 THIRD AVENUE, 38TH FLOOR<br><sub>(Street)</sub><br>NEW YORK, NY 10016<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-06-11 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>ERock, Inc. [ EROC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Energy Impact Fund (FT-B) LP<br><sub>(Last) (First) (Middle)</sub><br>600 THIRD AVENUE, 38TH FLOOR<br><sub>(Street)</sub><br>NEW YORK, NY 10016<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-06-11 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>ERock, Inc. [ EROC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Energy Impact Fund (FT-D) LP<br><sub>(Last) (First) (Middle)</sub><br>600 THIRD AVENUE, 38TH FLOOR<br><sub>(Street)</sub><br>NEW YORK, NY 10016<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-06-11 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>ERock, Inc. [ EROC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] 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 |
| Class A Common Stock | 2026-06-11 |  | J<sup>(2)</sup> |  | 19350897 | A | <sup>(2)</sup> | 19350897 | I | See Footnotes<sup>(1)(4)(5)</sup> |
| Class B Common Stock | 2026-06-11 |  | J<sup>(6)</sup> |  | 6041206<sup>(7)</sup> | D | <sup>(6)</sup> | 83355210 | I | See Footnotes<sup>(3)(4)(5)</sup> |

---

## 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 |
| Class B Units | <sup>(8)</sup> | 2026-06-11 |  | S<sup>(6)</sup> |  |  | 6041206 | <sup>(8)</sup> | <sup>(8)</sup> | Class A Common Stock | 6041206 | <sup>(6)</sup> | 83355210 | I | See Footnotes<sup>(3)(4)(5)</sup> |

---

### Footnotes:

(1) These securities are directly held by Energy Impact Fund (FT-B) LP ("FT-B").

(2) In connection with the Issuer's initial public offering of Class A common stock (the "Offering"), EIF ER Blocker LLC ("EIF ER Blocker") merged with and into the Issuer pursuant to the Blocker Mergers (as defined in the Issuer's prospectus filed with Securities and Exchange Commission on June 10, 2026 (the "Prospectus")). As a result of the merger, 20,751,551 Class A Units held by EIF ER Blocker were cancelled, and, as consideration pursuant to the Blocker Mergers, FT-B received 19,350,897 shares of Class A common stock of the Issuer and approximately $27.8 million in cash from the net proceeds from the closing of the Offering.

(3) These securities are directly held by EIP Flagship Fund I ER Holdings LLC ("Flagship").

(4) Each of EIF ER Holdings LLC ("EIF ER Holdings", as the sole owner of Flagship), Energy Impact Fund (FT-D) LP ("FT-D", as owner of EIF ER Holdings), Energy Impact Partners LLC ("EIP LLC", as the managing member of EIF ER Holdings and the general partner of FT-D) and Hans Kobler, a nominee to the Issuer's Board of Directors ("Board") (as the managing member of EIP LLC), may also be deemed to be the beneficial owners having shared voting power and shared investment power of the securities held by Flagship. Each of FT-B, EIP LLC (as the general partner of FT-B) and Mr. Kobler (as the managing member of EIP LLC) may also be deemed to be the beneficial owners having shared voting power and shared investment power of the securities held by FT-B. Voting and investment decisions with respect to the securities described in this Form 4 are made by the investment committee of EIP LLC, which is comprised of seven individuals,

(5) (Continued from footnote 4) including Mr. Kobler, Lindsay Luger and Sameer Reddy, each of whom is a nominee to the Issuer's Board. Each member of this investment committee disclaims beneficial ownership of all securities described by this Form 4 except to the extent of his or her pecuniary interest therein.

(6) The Issuer used approximately $119.9 million of the net proceeds from the closing of the Offering to purchase 6,041,206 Class B Units from Flagship. An equal number of shares of the Issuer's Class B common stock were cancelled in connection with the repurchase of the Class B Units.

(7) Shares of the Issuer's Class B common stock ("Class B Common Stock") have no economic value and have one vote per share. One share of Class B Common Stock is issued for each Class B Unit ("Class B Units") of Enchanted Rock Holdings, LLC ("ER Holdings") held. Upon an exchange of Class B Units for shares of the Issuer's Class A common stock ("Class A Common Stock"), an equivalent number of shares of Class B Common Stock held by such holder will be automatically cancelled.

(8) The Class B Units are exchangeable, at the holder's option, on a one-for-one basis into shares of Class A Common Stock.

**Signature:** /s/ Energy Impact Partners LLC, Daniel Reichert as attorney-in-fact  
**Date:** 2026-06-15

**Signature:** /s/ EIP Flagship Fund I ER Holdings LLC, Daniel Reichert as attorney-in-fact  
**Date:** 2026-06-15

**Signature:** /s/ EIF ER Holdings LLC, Daniel Reichert as attorney-in-fact  
**Date:** 2026-06-15

**Signature:** /s/ Energy Impact Fund (FT-B) LP, Daniel Reichert as attorney-in-fact  
**Date:** 2026-06-15

**Signature:** /s/ Energy Impact Fund (FT-D) LP, Daniel Reichert as attorney-in-fact  
**Date:** 2026-06-15

### 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.**