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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Secured Overnight Financing Rate, as reported by the Wall Street Journal (SOFR) plus 400 basis points. See “Organizational Structure” and “Certain Relationships and Related Person Transactions—Proposed Transactions with ERock, Inc.—Tax Receivable Agreement.” The following diagram reflects our simplified organizational structure immediately prior to the consummation of the Reorganization. Table of Contents The diagram below depicts our organizational structure following the completion of the Reorganization and this offering (assuming no exercise of the underwriters’ option to purchase additional shares). (1) At the closing of this offering, ERock will own Class A Units of ER Holdings. (2) Each share of Class A common stock of ERock will be entitled to one vote and will vote together with the Class B common stock as a single class, except as provided in our amended and restated certificate of incorporation or required by law. See “ Description of Capital Stock—Common Stock—Class A Common Stock. ”

(3)	Each share of Class B common stock is entitled to one vote and will vote together with the Class A
common stock as a single class, except as provided in our amended and restated certificate of incorporation or required by law. The Class B common stock will have no economic rights in ERock. See “ Description of Capital
Stock—Common Stock—Class B Common Stock. ”

(4)	The economic interest represents profits interest on a fully diluted basis, assuming all Class M Units have
vested and achieved their respective threshold amounts. See “ Organizational Structure — Reclassification and Amendment and Restatement of the Limited Liability Company Agreement of ER Holdings. ”

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Our Sponsor

Energy Impact Partners LP (our “Sponsor”) is an energy-focused investment firm that invests across venture, growth,
and credit strategies. Our Sponsor’s investor base includes utilities, energy companies and industrial partners. Our sponsor seeks to support portfolio companies in the development and commercialization of energy technologies.

Our Sponsor formed Energy Impact Fund (FT-B) LP and Energy Impact Fund (FT-D) LP (collectively, “Energy Impact
Fund”) in February 2017 for the principal purpose of indirectly holding equity interests in ER Holdings. Upon completion of this offering, Energy Impact Fund will beneficially own shares of our Class A common stock and
shares of our Class B common stock, representing approximately   % of our total common stock outstanding, and accordingly, it will control   % of the voting power of our common stock with respect to
director elections.

Implications of Being an Emerging Growth Company

As a company with less than $1.235 billion in revenue during our last fiscal year, we qualify as an emerging growth
company (“EGC”) as defined in the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). For so long as we remain an EGC, we are permitted, and have elected, to rely on exemptions from specified disclosure requirements
that are applicable to other public companies that are not EGCs. These exemptions include:

• being permitted to provide only two years of audited financial statements, in addition to any required
unaudited interim financial statements, with correspondingly reduced “Management’s Discussion and Analysis of Financial Condition and Results of Operations” disclosure;

• not being required to comply with the auditor attestation requirements in the assessment of our internal
control over financial reporting;

• not being required to comply with any requirement that may be adopted by the Public Company Accounting
Oversight Board (the “PCAOB”) regarding mandatory audit firm rotation or a supplement to the auditor’s report providing additional information about the audit and the financial statements;

• reduced disclosure obligations regarding executive compensation; and

• exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and obtaining
stockholder approval of any golden parachute payments not previously approved.

We may take advantage of
these provisions for up to five years following completion of this offering or such earlier time when we are no longer an EGC. We will cease to be an EGC if we have more than $1.235 billion in annual revenue, have more than $700.0 million
in market value of our capital stock held by non-affiliates or issue more than $1.0 billion of non-convertible debt over a three-year period. We may choose to take
advantage of some, but not all, of the available exemptions. We have taken advantage of some reduced reporting requirements in this prospectus. Accordingly, the information contained herein may be different than the information you receive from
other public companies in which you may hold stock. For a description of the qualifications and other requirements applicable to emerging growth companies and certain elections that we have made due to our status as an emerging growth company, see
“Risk Factors—Risks related to our Corporate Structure, our Class A Common Stock and this Offering—For as long as we are an emerging growth company, we will not be required to comply with certain
reporting requirements, including those relating to accounting standards and disclosure about our executive compensation, that apply to other public companies.”

The JOBS Act provides that an EGC may take advantage of an extended transition period for complying with new or revised
accounting standards. We intend to take advantage of all the reduced reporting requirements

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and exemptions, including the longer phase-in periods for the adoption of new or revised financial accounting standards under Section 107 of the JOBS
Act until we are no longer an emerging growth company. Our election to use the phase-in periods permitted by this election may make it difficult to compare our financial statements to those of non-emerging growth companies and other emerging growth companies that have opted out of the longer phase-in periods under Section 107 of the JOBS Act and who will comply
with new or revised financial accounting standards. If we were to subsequently elect instead to comply with these public company effective dates, such election would be irrevocable pursuant to Section 107 of the JOBS Act.

Corporate Information

Our principal executive offices are located at 1113 Vine Street, Suite 101, Houston, Texas 77002. Our website address is
www.erock.com. We expect to make our periodic reports and other information filed with or furnished to the SEC available, free of charge, through our website, as soon as reasonably practicable after those reports and other information are
electronically filed with or furnished to the SEC. Information contained on our website or linked therein or otherwise connected thereto does not constitute part of and is not incorporated by reference into this prospectus or the registration
statement of which this prospectus forms a part.

Summary of Our Risk Factors

An investment in our Class A common stock involves risks. Among these important risks are the following:

• Our business depends on demand for distributed energy generation in the United States, which is an emerging
and rapidly evolving market. The development of this market, and demand for our power system solutions from data center, utility, C&I, healthcare and retail end markets, is uncertain and may not proceed as we expect. If distributed energy
generation or our power system solutions do not achieve widespread acceptance or demand is lower than anticipated, our business, prospects, financial condition and results of operations could be materially and adversely affected.

• Certain estimates of market opportunity and forecasts of market growth included in this prospectus may prove
to be inaccurate.

• We have incurred significant losses in the past and we may not be able to achieve or sustain profitability in
the future.

• We may not recognize all revenues from our Contracted Power System Sales Backlog or receive all payments
anticipated from our Annualized Recurring Service Revenue. If we do not receive all of the revenue we currently expect to receive, our business, prospects, financial condition and results of operations could be materially and adversely affected.

• Our business is subject to risks that may arise in the course of completing installations, including those
associated with construction, utility interconnection, fuel supply, cost overruns and delays. Because our financial condition, results of operations and reputation depend on the timely installation of our power systems, failures or delays in
completing installations on a regular and timely basis could materially and adversely affect our business.

• We derive a substantial portion of our revenue and Contracted Power System Sales Backlog from a limited number
of customers. The loss of, or events affecting, one of our major customers could reduce our power system sales and have a material adverse effect on our business, financial condition, results of operations and key operating metrics.

• We face significant competition and many of our competitors are larger and have more resources.

• Our business involves many hazards and operational risks, some of which may not be fully covered by insurance,
customer indemnifications or other liability protections. The occurrence of a significant

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accident or other event that is not fully covered by insurance, customer indemnifications or other liability protections could curtail our operations and have a material adverse effect on our
business, financial condition and results of operations.