SEC Filing Document

Company: ERock, Inc.
Ticker: 
CIK: 2110029
Filing Type: S-1
Document Type: S-1
Date Filed: 2026-05-15
Accession Number: 0001193125-26-227199
Exchange: 
SIC Code: 3620
SIC Description: Electrical Industrial Apparatus
URL: https://www.sec.gov/Archives/edgar/data/2110029/000119312526227199/d12401ds1.htm

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($) (1) Total Compensation ($) Jim Decker 2025 198,172 — 198,172 Dan Brouillette (2) 2025 — 48,774 48,774 Mark Patterson (2) 2025 — 48,774 48,774 Sameer Reddy 2025 — — — Hans Kobler 2025 — — — Steven Yang 2025 — — — (1) Amounts reported in this column represent the aggregate grant date fair value of the Compensatory Units granted during 2025, calculated in accordance with FASB ASC Topic 718, disregarding the effect of estimated forfeitures. For additional information regarding the assumptions underlying this calculation please read Note 14—Stock-Based Compensation, to our consolidated financial statements for the year ended December 31, 2025. (2) As of December 31, 2025, Messrs. Brouillette and Patterson each held 968 outstanding unvested Compensatory Units. ER Holdings entered into service agreements with each of Messrs. Decker, Brouillette, and Patterson pursuant to which they are eligible to receive the following cash payments and equity incentive awards.

• Decker: Mr. Decker receives a monthly fee of $32,500, with a minimum term of six months (Mr. Decker
was appointed on May 28, 2025) or $195,000 in compensation unless he resigns or is removed for cause. Mr. Decker is also eligible to request discretionary bonuses subject to the consideration of ER Holdings. Mr. Decker resigned from the ER
Holdings board of managers on November 26, 2025.

• Brouillette: Mr. Brouillette was granted 1,161 Compensatory Units, which will vest on a monthly basis
over 36 months commencing July 18, 2025, subject to his continued services through each vesting date. Such Compensatory Units will accelerate upon a Company Sale.

• Patterson: Mr. Patterson was granted 1,161 Compensatory Units, which will vest on a monthly basis over 36
months commencing July 5, 2025, subject to his continued services through each vesting date. Such Compensatory Units will accelerate upon a Company Sale.

Messrs. Reddy, Kobler, and Yang did not receive any compensation during 2025 for services as a director. Mr. Yang resigned from
the ER Holdings board of managers on June 5, 2025.

In connection with this offering, we expect to adopt a new
director compensation policy pursuant to which members of our board of directors who are not employees or officers of the Company will receive:

• Annual cash retainer of $80,000;

• Annual equity grant of restricted stock units with a value of approximately $140,000;

• An additional equity grant of restricted stock units with a value of approximately $140,000 for a
director’s first year of board service; and

• Additional annual cash retainers of (i) $25,000 for service as the Chair of the Audit Committee,
(ii) $15,000 for service as the Chair of the Governance Committee, and (iii) $15,000 for service as the Chair of the Compensation Committee.

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CERTAIN RELATIONSHIPS AND RELATED PERSON TRANSACTIONS

The following is a description of certain relationships and transactions that exist or have existed or that we have entered
into with our directors, executive officers and their affiliates and immediate family members.

The following are
summaries of certain provisions of our related party agreements, which are qualified in their entirety by reference to all of the provisions of such agreements. Because these descriptions are only summaries of the applicable agreements, they do not
necessarily contain all of the information that you may find useful. We therefore encourage you to review the agreements in their entirety. Copies of the agreements (or forms of the agreements) have been filed as exhibits to the registration
statement of which this prospectus is a part, and are available electronically on the website of the SEC at www.sec.gov.

Proposed Transactions with
ERock, Inc.

ERock has had no assets or business operations since its incorporation and has not engaged in any
transactions with our current directors, director nominees, executive officers or sole security holder prior to the Reorganization and this offering. In connection with the Reorganization and this offering, we will engage in certain transactions
with certain of our directors, director nominees, each of our executive officers and other persons and entities who will become holders of 5% or more of our voting securities through their ownership of shares of our common stock upon the
consummation of the Reorganization and this offering. These transactions are described in “Organizational Structure.”

Reorganization

In connection with the Reorganization, we will (i) enter into the Tax Receivable Agreement and the Registration Rights
Agreement, (ii) acquire from ER Holdings Class A Units in exchange for all of the proceeds of this offering to ER Holdings, (iii) issue shares of Class B common stock to Continuing Equity Unitholders, (iv) undertake the Blocker
Mergers and (v) from time to time after this offering, allow for the exchange Class B Units (in combination with the cancellation of the corresponding shares of Class B common stock) for shares of our Class A common stock or, at
our election, for cash, on an ongoing basis.

Tax Receivable Agreement

Following the IPO, the Continuing Equity Unitholders holding Class B Units in ER Holdings may exchange their Class B
Units for shares of our Class A common stock on a one-for-one basis or, in our sole discretion, for cash. Additionally, the Continuing Profits Interest Unitholders
holding Class M Units in ER Holdings may convert their Class M Units into Class B Units of equivalent value at the time of the conversion to the then-current value of the exchanged Class M Unit. ER Holdings will have in effect an election under
Section 754 of the Code for the taxable year of the IPO and each taxable year in which an exchange occurs. Because this election will be in effect, these exchanges are expected to result in increases to the tax basis of the tangible and
intangible assets of ER Holdings which will be allocated to us. These increases in tax basis are expected to increase our depreciation and amortization deductions for tax purposes and create other tax benefits and may also decrease gains (or
increase losses) on future dispositions of certain assets and therefore may reduce the amount of tax that we would otherwise be required to pay.

Concurrently with the closing of the IPO, we will enter into the Tax Receivable Agreement with the TRA Beneficiaries, and a
designated TRA representative. The Tax Receivable Agreement will provide for payment by us to the TRA Beneficiaries of 85% of the amount of the net cash tax savings, if any, that we actually realize or are deemed to realize (calculated using certain
assumptions) as a result of our use of certain tax benefits resulting from (i) certain increases in, or adjustments to, the tax basis of assets of ER Holdings and its subsidiaries resulting from exchanges of ER Holdings membership interests in
the future, (ii) certain tax attributes available to us as a result of the Reorganization, and (iii) certain other tax benefits related to our entering into the Tax Receivable Agreement, including tax benefits attributable to payments that
we make under the Tax Receivable Agreement.

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We will retain the benefit of the remaining 15% of these deemed net cash tax
savings. The obligations under the Tax Receivable Agreement will be our obligations and not obligations of ER Holdings. For purposes of the Tax Receivable Agreement, the net cash savings deemed realized by us will be computed by comparing our
U.S. federal, state, local and non-U.S. income tax liability, adjusted for certain assumptions, to the amount of such U.S. federal, state, local and non-U.S. taxes that we would have been required to pay had we not been able to use any of the
benefits subject to the Tax Receivable Agreement. The actual tax benefits realized by us may differ from the tax benefits used for purposes of calculating payments under the Tax Receivable Agreement as a result of the use of certain assumptions in
the Tax Receivable Agreement, including the use of an assumed weighted-average state and local income tax rate to calculate tax benefits.

The term of the Tax Receivable Agreement will begin upon the completion of the IPO and will continue until all tax benefits
that are subject to the Tax Receivable Agreement have been used or have expired, unless we exercise our right to terminate the Tax Receivable Agreement (or the Tax Receivable Agreement is terminated due to our breach of a material obligation
thereunder), in which case we will be required to make the termination payment specified in the Tax Receivable Agreement, as specified below. We expect that all of the intangible assets, including goodwill, of ER Holdings allocable to ER Holdings
units acquired or deemed acquired by us from a holder of exchangeable units and in taxable exchanges following the IPO will be amortizable for tax purposes.