# EDGAR Filing Document

**Accession Number:** 0002138137
**File Stem:** 0001193125-26-275971
**Filing Date:** 2026-6
**Character Count:** 34365
**Document Hash:** b8485cea04a25299e92559bd7c4a0a2c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-275971.hdr.sgml**: 20260618

**ACCESSION NUMBER**: 0001193125-26-275971

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260618

**DATE AS OF CHANGE**: 20260618

**SUBJECT COMPANY**: 

**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

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-95762
- **FILM NUMBER:** 261103284

**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
**FILED BY**: 

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

**ORGANIZATION NAME:**
- **EIN:** 473367446
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D

**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

### Attached PDF Documents

**Attachment 1:** `ck0000000000-ex99_1.pdf`

_No text found in this document._

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**ERock, Inc.**

*(Name of Issuer)*

**Class A common stock, $0.01 par value per share**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

**Joshua J. Feldman**<br>c/o Energy Impact Partners LLC<br>600 Third Avenue, 38th Floor<br>New York NY 10016<br>212-899-9700

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**06/11/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Energy Impact Partners LLC** | Name of reporting person<br>**Energy Impact Partners LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**102813846.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**102813846.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**102813846.00** | Aggregate amount beneficially owned by each reporting person<br>**102813846.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**78.1%** | Percent of class represented by amount in Row (11)<br>**78.1%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Consists of (i) 19,350,897 shares of Class A common stock (as defined in Item 1(a)) held by FT-B (as defined in Item 2(a)), (ii) 83,355,210 shares of Class B common stock (the "Class B common stock") and 83,355,210 corresponding Class B Units of Enchanted Rock Holdings, LLC ("ER Holdings") held by Flagship (as defined in Item 2(a)) and (iii) 107,739 shares of Class A common stock underlying 111,545 Class M Units of ER Holdings, all of which are vested. The Class B Units are exchangeable, at the holder's option, on a one-for-one basis into shares of Class A common stock of the Issuer (as defined in Item 1(b)). Upon exchange of a Class B Unit, an equivalent number of shares of Class B common stock will be automatically cancelled. Vested Class M Units are convertible, at the holder's option, into a number of Class B Units generally equal to the product of (a) the number of vested Class M Units to be converted, and (b) a fraction, the numerator of which is the amount that would be distributed in respect of the vested Class M Unit (taking into account the applicable threshold amount), and the denominator of which is the amount that would be distributed in respect of a Class B Unit, in each case if, immediately before the exchange, ER Holdings were to sell all of its assets for their fair market values, pay any liabilities, and distribute the proceeds available for distribution, subject to certain adjustments. Class M Units have no expiration date. Each of EIF ER Holdings (as defined in Item 2(a)), as the sole owner of Flagship), FT-D (as defined in Item 2(a)), as owner of EIF ER Holdings) and EIP LLC (as defined in Item 2(a)), as the managing member of EIF ER Holdings and the general partner of FT-D) and Hans Kobler (as managing member of EIP LLC) may be deemed to have voting and dispositive power over the shares held by Flagship. Each of FT-B, EIP LLC (as the general partner of FT-B) and Mr. Kobler, a member of the Issuer's Board and 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 footnote are made by the investment committee of Energy Impact Partners LLC, which comprises seven individuals, including Mr. Kobler, Lindsay Luger ("Ms. Luger") and Sameer Reddy ("Mr. Reddy"), each of whom is a member of the Issuer's Board. Each member of this investment committee disclaims beneficial ownership of all securities described by this footnote except to the extent of his or her pecuniary interest therein.

Based on 48,174,023 shares of Class A common stock outstanding as of June 11, 2026, following the closing of the Issuer's initial public offering of its Class A common stock (the "Offering"), as reported by the Issuer in its prospectus filed with the United States Securities and Exchange Commission (the "Commission") on June 10, 2026 (the "Prospectus"), assuming no exercise of the underwriters' option to purchase 4,186,046 additional shares of Class A common stock (the "Underwriters' Option").

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Energy Impact Fund (FT-B) LP** | Name of reporting person<br>**Energy Impact Fund (FT-B) LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**19350897.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**19350897.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**19350897.00** | Aggregate amount beneficially owned by each reporting person<br>**19350897.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**40.2%** | Percent of class represented by amount in Row (11)<br>**40.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

**Comment for Reporting Person:** Consists of 19,350,897 shares of Class A common stock held by FT-B. Each of EIP LLC (as the general partner of FT-B) and Mr. Kobler, a member of the Issuer's Board and 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 footnote are made by the investment committee of Energy Impact Partners LLC, which comprises seven individuals, including Mr. Kobler, Ms. Luger and Mr. Reddy, each of whom is a member of the Issuer's Board. Each member of this investment committee disclaims beneficial ownership of all securities described by this footnote except to the extent of his or her pecuniary interest therein.

Based on 48,174,023 shares of Class A common stock outstanding as of June 11, 2026, following the closing of the Offering, as reported by the Issuer in the Prospectus, assuming no exercise of the Underwriters' Option.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**EIP Flagship Fund I ER Holdings LLC** | Name of reporting person<br>**EIP Flagship Fund I ER Holdings LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**83462949.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**83462949.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**83462949.00** | Aggregate amount beneficially owned by each reporting person<br>**83462949.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**63.4%** | Percent of class represented by amount in Row (11)<br>**63.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Consists of (i) 83,355,210 shares of Class B common stock and 83,355,210 corresponding Class B Units held by Flagship and (ii) 107,739 shares of Class A common stock underlying 111,545 Class M Units, all of which are vested. The Class B Units are exchangeable, at the holder's option, on a one-for-one basis into shares of Class A common stock of the Issuer. Upon exchange of a Class B Unit, an equivalent number of shares of Class B common stock will be automatically cancelled. Vested Class M Units are convertible, at the holder's option, into a number of Class B Units generally equal to the product of (a) the number of vested Class M Units to be converted, and (b) a fraction, the numerator of which is the amount that would be distributed in respect of the vested Class M Unit (taking into account the applicable threshold amount), and the denominator of which is the amount that would be distributed in respect of a Class B Unit, in each case if, immediately before the exchange, ER Holdings were to sell all of its assets for their fair market values, pay any liabilities, and distribute the proceeds available for distribution, subject to certain adjustments. Class M Units have no expiration date. Each of EIF ER Holdings (as the sole owner of Flagship), FT-D (as owner of EIF ER Holdings) and EIP LLC (as the managing member of EIF ER Holdings and the general partner of FT-D) and Mr. Kobler, a member of the Issuer's Board and the managing member of EIP LLC, may be deemed to have voting and dispositive power over the shares held by Flagship. Voting and investment decisions with respect to the securities described in this footnote are made by the investment committee of Energy Impact Partners LLC, which comprises seven individuals, including Mr. Kobler, Ms. Luger and Mr. Reddy, each of whom is a member of the Issuer's Board. Each member of this investment committee disclaims beneficial ownership of all securities described by this footnote except to the extent of his or her pecuniary interest therein.

Based on 48,174,023 shares of Class A common stock outstanding as of June 11, 2026, following the closing of the Offering, as reported by the Issuer in the Prospectus, assuming no exercise of the Underwriters' Option.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**EIF ER Holdings LLC** | Name of reporting person<br>**EIF ER Holdings LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**83462949.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**83462949.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**83462949.00** | Aggregate amount beneficially owned by each reporting person<br>**83462949.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**63.4%** | Percent of class represented by amount in Row (11)<br>**63.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Consists of (i) 83,355,210 shares of Class B common stock and 83,355,210 corresponding Class B Units held by Flagship and (ii) 107,739 shares of Class A common stock underlying 111,545 Class M Units, all of which are vested. The Class B Units are exchangeable, at the holder's option, on a one-for-one basis into shares of Class A common stock of the Issuer. Upon exchange of a Class B Unit, an equivalent number of shares of Class B common stock will be automatically cancelled. Vested Class M Units are convertible, at the holder's option, into a number of Class B Units generally equal to the product of (a) the number of vested Class M Units to be converted, and (b) a fraction, the numerator of which is the amount that would be distributed in respect of the vested Class M Unit (taking into account the applicable threshold amount), and the denominator of which is the amount that would be distributed in respect of a Class B Unit, in each case if, immediately before the exchange, ER Holdings were to sell all of its assets for their fair market values, pay any liabilities, and distribute the proceeds available for distribution, subject to certain adjustments. Class M Units have no expiration date. Each of EIF ER Holdings (as the sole owner of Flagship), FT-D (as owner of EIF ER Holdings) and EIP LLC (as the managing member of EIF ER Holdings and the general partner of FT-D) and Mr Kobler, a member of the Issuer's Board and the managing member of EIP LLC, may be deemed to have voting and dispositive power over the shares held by Flagship. Voting and investment decisions with respect to the securities described in this footnote are made by the investment committee of Energy Impact Partners LLC, which comprises seven individuals, including Mr. Kobler, Ms. Luger and Mr. Reddy, each of whom is a member of the Issuer's Board. Each member of this investment committee disclaims beneficial ownership of all securities described by this footnote except to the extent of his or her pecuniary interest therein.

Based on 48,174,023 shares of Class A common stock outstanding as of June 11, 2026, following the closing of the Offering, as reported by the Issuer in the Prospectus, assuming no exercise of the Underwriters' Option.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Energy Impact Fund (FT-D) LP** | Name of reporting person<br>**Energy Impact Fund (FT-D) LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**83462949.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**83462949.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**83462949.00** | Aggregate amount beneficially owned by each reporting person<br>**83462949.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**63.4%** | Percent of class represented by amount in Row (11)<br>**63.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

**Comment for Reporting Person:** Consists of (i) 83,355,210 shares of Class B common stock and 83,355,210 corresponding Class B Units held by Flagship and (ii) 107,739 shares of Class A common stock underlying 111,545 Class M Units, all of which are vested. The Class B Units are exchangeable, at the holder's option, on a one-for-one basis into shares of Class A common stock of the Issuer. Upon exchange of a Class B Unit, an equivalent number of shares of Class B common stock will be automatically cancelled. Vested Class M Units are convertible, at the holder's option, into a number of Class B Units generally equal to the product of (a) the number of vested Class M Units to be converted, and (b) a fraction, the numerator of which is the amount that would be distributed in respect of the vested Class M Unit (taking into account the applicable threshold amount), and the denominator of which is the amount that would be distributed in respect of a Class B Unit, in each case if, immediately before the exchange, ER Holdings were to sell all of its assets for their fair market values, pay any liabilities, and distribute the proceeds available for distribution, subject to certain adjustments. Class M Units have no expiration date. Each of EIF ER Holdings (as the sole owner of Flagship), FT-D (as owner of EIF ER Holdings) and EIP LLC (as the managing member of EIF ER Holdings and the general partner of FT-D) and Mr. Kobler, a member of the Issuer's Board and the managing member of EIP LLC, may be deemed to have voting and dispositive power over the shares held by Flagship. Voting and investment decisions with respect to the securities described in this footnote are made by the investment committee of Energy Impact Partners LLC, which comprises seven individuals, including Mr. Kobler, Ms. Luger and Mr. Reddy, each of whom is a member of the Issuer's Board. Each member of this investment committee disclaims beneficial ownership of all securities described by this footnote except to the extent of his or her pecuniary interest therein.

Based on 48,174,023 shares of Class A common stock outstanding as of June 11, 2026, following the closing of the Offering, as reported by the Issuer in the Prospectus, assuming no exercise of the Underwriters' Option.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Hans Kobler** | Name of reporting person<br>**Hans Kobler** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**102813846.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**102813846.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**102813846.00** | Aggregate amount beneficially owned by each reporting person<br>**102813846.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**78.1%** | Percent of class represented by amount in Row (11)<br>**78.1%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** Consists of (i) 19,350,897 shares of Class A common stock (as defined in Item 1(a)) held by FT-B (as defined in Item 2(a)), (ii) 83,355,210 shares of Class B common stock and 83,355,210 corresponding Class B Units held by Flagship (as defined in Item 2(a)) and (iii) 107,739 shares of Class A common stock underlying 111,545 Class M Units, all of which are vested. The Class B Units are exchangeable, at the holder's option, on a one-for-one basis into shares of Class A common stock of the Issuer (as defined in Item 1(b)). Upon exchange of a Class B Unit, the corresponding share of Class B common stock will be automatically cancelled. Vested Class M Units are convertible, at the holder's option, into a number of Class B Units generally equal to the product of (a) the number of vested Class M Units to be converted, and (b) a fraction, the numerator of which is the amount that would be distributed in respect of the vested Class M Unit (taking into account the applicable threshold amount), and the denominator of which is the amount that would be distributed in respect of a Class B Unit, in each case if, immediately before the exchange, ER Holdings were to sell all of its assets for their fair market values, pay any liabilities, and distribute the proceeds available for distribution, subject to certain adjustments. Class M Units have no expiration date. Each of EIF ER Holdings (as the sole owner of Flagship), FT-D (as owner of EIF ER Holdings), EIP LLC (as the managing member of EIF ER Holdings and the general partner of FT-D) and Mr. Kobler, a member of the Issuer's Board and the managing member of EIP LLC, may be deemed to have voting and dispositive power over the shares held by Flagship. Each of FT-B, EIP LLC (as the general partner of FT-B) and Mr. Kobler, a member of the Issuer's Board and 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 footnote are made by the investment committee of Energy Impact Partners LLC, which comprises seven individuals, including Mr. Kobler, Ms. Luger and Mr. Reddy, each of whom is a member of the Issuer's Board. Each member of this investment committee disclaims beneficial ownership of all securities described by this footnote except to the extent of his or her pecuniary interest therein.

Based on 48,174,023 shares of Class A common stock outstanding as of June 11, 2026, following the closing of the Offering, as reported by the Issuer in the Prospectus, assuming no exercise of the Underwriters' Option.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Class A common stock, $0.01 par value per share

**(b) Name of Issuer:**
ERock, Inc.

**(c) Address of Issuer's Principal Executive Offices:**
1113 Vine St., Suite 101, Houston, TX, 77002

**Item 4. Purpose of Transaction**

The information set forth in Item 3 of this Statement is incorporated herein by reference. The Reporting Persons hold the securities of the Issuer for general investment purposes. The Reporting Persons may, from time to time, depending on prevailing market, economic and other conditions, acquire additional shares of Class A common stock or other securities of the Issuer, dispose of any such securities, or engage in discussions with the Issuer concerning such acquisitions or dispositions or further investments in the Issuer. The Reporting Persons intend to review their investment in the Issuer on a continuing basis and, depending upon the price and availability of shares of Class A common stock or other securities of the Issuer, subsequent developments affecting the Issuer, the Issuer's business and prospects, other investment and business opportunities available to the Reporting Persons, general stock market and economic conditions, tax considerations and other factors considered relevant, may decide at any time to increase or to decrease the size of their investment in the Issuer in the open market, in privately negotiated transactions, pursuant to 10b5-1 trading plans or otherwise.

Except as set forth above, the Reporting Persons have no present plans or intentions which would result in or relate to any of the transactions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D.

**Item 5. Interest in Securities of the Issuer**

**(a)**
See Items 7-11 of the cover pages of this Statement and Item 2 above. Except to the extent of his or its pecuniary interest therein, each Reporting Person disclaims beneficial ownership of such shares of Common Stock, except for the shares, if any, such Reporting Person holds of record.

**(b)**
See Items 7-11 of the cover pages of this Statement and Item 2 above. Except to the extent of his or its pecuniary interest therein, each Reporting Person disclaims beneficial ownership of such shares of Common Stock, except for the shares, if any, such Reporting Person holds of record.

**(c)**
Except as reported in this Statement, none of the Reporting Persons has effected any transactions in the Issuer's securities within the past 60 days.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

The Reporting Persons and certain of the Issuer's other investors entered into the Registration Rights Agreement, dated June 11, 2026 (the "Rights Agreement"). Following the closing of the Offering, the stockholders party thereto are entitled to certain registration rights, including the right to demand that the Issuer file a registration statement or request that their shares be covered by a registration statement that the Issuer is otherwise filing. The terms and provisions of the Rights Agreement are described more fully in the Issuer's Registration Statement on Form S-1 (File No. 333-295965) and declared effective by the Commission on June 9, 2026 (the "Registration Statement"), and the above summary is qualified by reference to such description and the full text of the Rights Agreement, which is filed as Exhibit 2 to this Statement and is incorporated herein by reference.

In connection with the Offering, Flagship, FT-B and Mr. Kobler entered into lock-up agreements, substantially in the form attached as Exhibit A to the Underwriting Agreement filed with the Registration Statement. Pursuant to such lock-up agreements, such Reporting Persons have agreed, subject to certain exceptions, not to sell, transfer or otherwise convey any of the Issuer's securities held by each of the Reporting Persons for 180 days following the date of the underwriting agreement for the Offering. The terms and provisions of the lock-up agreements are described more fully in the Registration Statement, and the above summary is qualified by reference to such description and the full text of the lock-up agreement, a form of which is filed as Exhibit 3 to this Statement as attached as Exhibit A to the Underwriting Agreement filed with the Registration Statement and is incorporated herein by reference.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Energy Impact Partners LLC

**Signature:** /s/ Joshua J. Feldman

**Name/Title:** Joshua J. Feldman, Authorized Signatory

**Date:** 06/18/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Energy Impact Fund (FT-B) LP

**Signature:** /s/ Joshua J. Feldman

**Name/Title:** Joshua J. Feldman, Authorized Signatory

**Date:** 06/17/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** EIP Flagship Fund I ER Holdings LLC

**Signature:** /s/ Joshua J. Feldman

**Name/Title:** Joshua J. Feldman, Authorized Signatory

**Date:** 06/18/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** EIF ER Holdings LLC

**Signature:** /s/ Joshua J. Feldman

**Name/Title:** Joshua J. Feldman, Authorized Signatory

**Date:** 06/18/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Energy Impact Fund (FT-D) LP

**Signature:** /s/ Joshua J. Feldman

**Name/Title:** Joshua J. Feldman, Authorized Signatory

**Date:** 06/18/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Hans Kobler

**Signature:** /s/ Joshua J. Feldman

**Name/Title:** Joshua J. Feldman, as attorney in fact for Hans Kobler

**Date:** 06/18/2026