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Energy Impact Partners–affiliated funds reported a major ownership stake in ERock, Inc. on a Form 3. EIP Flagship Fund I ER Holdings LLC directly holds Class B Units of Enchanted Rock Holdings LLC that correspond to 89,396,416 shares of Class A Common Stock on an exchange basis.
The same group also indirectly holds 107,739 Class M Units, which are fully vested “profits interests” that can convert into Class B Units and then into Class A Common Stock under a formula tied to distribution values. The related Class B Common Stock carries voting rights but no economic value and is issued one share per Class B Unit.
ERock, Inc. Chief Financial Officer Robert Ian Blakely filed an initial Form 3 reporting his equity holdings. He directly holds 4,936,761 shares of Class B Common Stock, which carry voting rights but no economic value and are paired one-for-one with Class B Units of Enchanted Rock Holdings.
He also holds several tranches of Class M and Class B Units in Enchanted Rock Holdings that are exchangeable into Class A Common Stock, with underlying amounts including 630,574 and 2,901,038 Class A-equivalent shares at stated threshold amounts. Portions of these Class M Units have already vested, with the remainder vesting in monthly installments from mid‑2026 through late 2028, subject to his continued service.
ERock, Inc. President Corey Amthor filed an initial ownership report showing significant equity interests in different share classes and units. He holds 4,705,874 Class B Units and an equivalent number of Class B Common Stock shares directly, plus 1,534,876 Class B Units and related Class B Common Stock indirectly through Amthor Family Holdings, Ltd.
The filing also lists indirect holdings of Class M Units in Enchanted Rock Holdings, LLC that are convertible into Class B Units and ultimately Class A Common Stock at exercise prices of $1.61 and $0.15 per unit. Footnotes explain that Class B Common Stock carries voting power but no economic value, and describe detailed vesting schedules for portions of the Class M Units through July 2028, contingent on continued service.
ERock, Inc. director and officer John Eugene Carrington filed an initial ownership report showing holdings of derivative securities tied to Class A Common Stock. He reports Class M Units that can ultimately relate to Class B Units and then to Class A Common Stock.
The filing shows Class M Units corresponding to 11,349,822 underlying shares of Class A Common Stock held directly, 516,713 underlying shares held indirectly through a trust, and an additional 644,002 underlying shares held directly. Footnotes explain that Class M Units are profits interests, some fully vested and others vesting in monthly installments beginning on June 26, 2026, subject to continued service.
ERock, Inc. plans an initial public offering of 27,906,977 shares of Class A common stock, expected to price between $20.00 and $23.00 per share and list on the NYSE under “EROC.” The company uses an UP‑C structure, with ERock holding Class A units of Enchanted Rock Holdings, LLC and pre‑IPO owners retaining most economic and voting power through Class B stock and LLC units. ERock provides natural‑gas‑fueled distributed power systems and software, reporting 2025 revenue of $183.1 million and a net loss of $59.0 million, plus a $1.3 billion contracted power system sales backlog as of March 31, 2026. A Tax Receivable Agreement could require substantial future cash payments to pre‑IPO holders based on tax benefits realized after the IPO.