SEC Filing Document

Company: ERock, Inc.
Ticker: 
CIK: 2110029
Filing Type: DRS/A
Document Type: DRS/A
Date Filed: 2026-04-24
Accession Number: 0001193125-26-177695
Exchange: 
SIC Code: 3620
SIC Description: Electrical Industrial Apparatus
URL: https://www.sec.gov/Archives/edgar/data/2110029/000119312526177695/filename1.htm

Chunk 2 of 107
Word Count: 1500
Character Count: 9996

Document Content:

the context, all references to “ERock,” “Enchanted Rock,” the “Company,” “we,” “our” and “us” or similar terms refer to (i) ER Holdings and its consolidated subsidiaries before the Reorganization and (ii) ERock and its consolidated subsidiaries after the Reorganization. Except as otherwise indicated or the context otherwise requires, references to “common stock” refer to our Class A common stock and Class B common stock, collectively. Except as otherwise indicated, all information contained in this prospectus (i) assumes an initial public offering price of $ per share of Class A common stock (the midpoint of the price range set forth on the cover of this prospectus) and (ii) assumes that the underwriters do not exercise their option to purchase additional shares. For the definitions of certain terms and abbreviations used in this prospectus, see “Glossary of Industry and ERock Terms” beginning on page iii of this prospectus. Industry and Market Data

Certain market and industry data and forecasts used in this prospectus have been obtained from the following independent
industry publications or reports: (i) International Energy Agency; (ii) North American Electric Reliability Corporation; (iii) Institute for Energy Economics and Financial Analysis; (iv) Wood Mackenzie; and (v) publicly available
reports and data. Some market data and statistical information contained in this prospectus are also based on management’s estimates and calculations, which are derived from our review and interpretation of publicly available industry
publications, our internal research and our knowledge of the markets in which we currently, and will in the future, operate. This information involves a number of assumptions and limitations, and you are cautioned not to give undue weight to such
information. Forecasts and other forward-looking information obtained from these sources are subject to the same qualifications and uncertainties as the other forward-looking statements in this prospectus. Statements as to our market position are
based on market data currently available to us, as well as management’s estimates and assumptions regarding the size of our markets within our industry. While we are not aware of any misstatements regarding our industry data presented herein,
our estimates involve risks and uncertainties and are subject to change based on various factors, including those discussed under the headings “Risk Factors” and “Cautionary Statement Regarding Forward-Looking Statements” in
this prospectus. Neither we nor the underwriters can guarantee the accuracy or completeness of such information contained in this prospectus.

Trademarks and Trade Names

We own or have rights to various trademarks, service marks and trade names that we use in connection with the operation of our
business. This prospectus may also contain trademarks, service marks and trade names of third parties, which are the property of their respective owners. Our use or display of third parties’ trademarks, service marks, trade names or products
in this prospectus is not intended to, and does not imply, a relationship with us or an endorsement or sponsorship by or of us. Solely for convenience, the trademarks, service marks and trade names referred to in this prospectus may appear without
the ®, ™ or SM symbols, but such references are not intended to indicate, in any way, that we will not assert, to the fullest extent
under applicable law, our rights or the right of the applicable licensor to these trademarks, service marks and trade names.

Table of Contents

GLOSSARY OF INDUSTRY AND EROCK TERMS

The terms and abbreviations defined in this section are used throughout this prospectus:

• “AI” refers to artificial intelligence.

• “Annualized Recurring Service Revenue” refers to the annualized value of recurring revenue under
contracted operations and maintenance service and asset management agreements as of the measurement date, including both fixed contractual payments and variable payments based on typical utilization of such services.

• “backup power” or “resiliency” refers to a mode in which our power systems provide
continuity for operations during grid disruptions and extreme weather events.

• “Blocked Unitholders” refers to certain pre-IPO owners that will receive shares of Class A common
stock of us pursuant to the Blocker Mergers (including Energy Impact Fund (FT-B) LP) as defined and described in “Organizational Structure—Blocker Mergers.”

• “bridge power” refers to a mode in which our power systems provide temporary generation to meet
customer needs during the period before full grid interconnection becomes available.

• “C&I” refers to commercial and industrial.

• “CAISO” refers to the California Independent System Operator.

• “CARB” refers to the California Air Resources Board.

• “CARB-DG” refers to the California Air Resources Board
Distributed Generation certification standard.

• “CO” refers to carbon monoxide.

• “CO2” refers to carbon dioxide.

• “Common Units” refers to the interests in ER Holdings called “Common Units” that are
outstanding prior to the Reclassification.

• “Compensatory Units” refers to the interests in ER Holdings called “Compensatory
Units” that are outstanding prior to the Reclassification.

• “conditional firm interconnections” refers to firm service except during certain identified system
conditions.

• “Continuing Equity Unitholders” refers to certain pre-IPO holders of Common and/or Preferred Units
who will hold Class B Units following the Reclassification (including Energy Impact Fund (FT-D) LP), as described under “Organizational Structure.”

• “Continuing Profits Interest Unitholders” refers to certain current or former employees of ER
Holdings who will hold Class M Units following the Reclassification.

• “Contracted Power System Sales Backlog” refers to the actual contracted value for purchases of
power systems and ESI services, whether invoiced or not, to be invoiced and recognized as revenue as a result of performing our obligations over the term of the contract, assuming no exceptions or contingencies are exercised, and includes
adjustments for contract modifications entered into after period-end and prior to the issuance of the related financial disclosures.

• “dispatchable power” or “flexible capacity” refers to a mode in which our power
systems are configured as on-demand, fast-response resources.

• “ECU” refers to electronic control unit.

• “ERCOT” refers to the Electric Reliability Council of Texas.

Table of Contents

• “ESI” refers to equipment, supply and installation.

• “Exchange” refers to an exchange by the Continuing Equity Unitholders and/or the Continuing
Profits Interest Unitholders pursuant to which ER Holdings acquires Class B Units (and Class B Units converted from Class M Units), along with, in the case of the Continuing Equity Unitholders, the cancellation of an equal number of shares
of Class B common stock, for shares of our Class A common stock on a one-for-one basis or, at our election, for cash.

• “FERC” refers to the Federal Energy Regulatory Commission.

• “GHG” refers to greenhouse gases.

• “Gigawatt” or “GW” refers to one billion watts.

• “Grid Support Event” refers to any period during which the electrical grid is experiencing actual
or anticipated constraints and the Company utilizes customer-owned power systems to provide power to support grid stability. Grid Support Events may occur pursuant to a direct request from the grid operator or through participation in incentive
based programs that compensate generators for providing such support.

• “IEA” refers to the International Energy Agency.

• “IPO” or this “offering” refers to the initial public offering of shares of
Class A common stock by us.

• “ISO” refers to Independent System Operator.

• “ISO 8528-5 G3” refers to the International Organization
for Standardization standard for reciprocating internal combustion engine driven generating sets, Part 5: Generating sets, specifically the G3 classification for transient performance.

• “installed base” refers to the total installed watt capacity of our power systems that have been
deployed and are currently operational.

• “Megawatt” or “MW” refers to one million watts.

• “MISO” refers to the Midcontinent Independent System Operator.

• “NERC” refers to the North American Electric Reliability Corporation.

• “NMHC” refers to non-methane hydrocarbons.

• “NOCs” refers to network operations centers.

• “NOx” refers to nitrous oxides, including nitric oxide and nitrogen dioxide.

• “O&M” refers to operations and maintenance.

• “PJM” refers to PJM Interconnection, the regional transmission organization coordinating the
wholesale electricity market in all or parts of 13 states and the District of Columbia.

• “Preferred Units” refers to the interests in ER Holdings called “Preferred Units” that
are outstanding prior to the Classification.

• “prime power rating” refers to, as defined by the industry standard
ISO8528-1, is the maximum power which a generating set is capable of delivering continuously while supplying a variable electrical load when operated for an unlimited number of hours per year under the agreed
operating conditions with the maintenance intervals and procedures being carried out as prescribed by the manufacturer.

• “RTO” refers to regional transmission organization.

• “SCADA” refers to supervisory control and data acquisition systems.

• “Tier 2” refers to capacity additions that include capacity that has been requested but that has
not received approval for planning requirements.

Table of Contents

• “transient performance” refers to our power systems’ ability to respond to sudden changes in
electrical load, including how quickly and how stably it can adjust its output and maintain voltage and frequency when the load increases or decreases unexpectedly.

• “TRIR” refers to total recordable incident rate.

• “TWh” refers to terawatt-hour.