Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Class A Common Stock^F2,F1,F4,F5	Jun 11, 2026	J	19,350,897	—	A	19,350,897	I	See Footnotes
Class B Common Stock^{F7,F6,F3,F4,F5}	Jun 11, 2026	J	6,041,206	—	D	83,355,210	I	See Footnotes

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Class B Units^{F6,F3,F4,F5,F8}	—	Jun 11, 2026	S	6,041,206	D	—	—	Class A Common Stock	6,041,206	83,355,210	I

Explanation of responses

F1These securities are directly held by Energy Impact Fund (FT-B) LP ("FT-B").
F2In connection with the Issuer's initial public offering of Class A common stock (the "Offering"), EIF ER Blocker LLC ("EIF ER Blocker") merged with and into the Issuer pursuant to the Blocker Mergers (as defined in the Issuer's prospectus filed with Securities and Exchange Commission on June 10, 2026 (the "Prospectus")). As a result of the merger, 20,751,551 Class A Units held by EIF ER Blocker were cancelled, and, as consideration pursuant to the Blocker Mergers, FT-B received 19,350,897 shares of Class A common stock of the Issuer and approximately $27.8 million in cash from the net proceeds from the closing of the Offering.
F3These securities are directly held by EIP Flagship Fund I ER Holdings LLC ("Flagship").
F4Each of EIF ER Holdings LLC ("EIF ER Holdings", as the sole owner of Flagship), Energy Impact Fund (FT-D) LP ("FT-D", as owner of EIF ER Holdings), Energy Impact Partners LLC ("EIP LLC", as the managing member of EIF ER Holdings and the general partner of FT-D) and Hans Kobler, a nominee to the Issuer's Board of Directors ("Board") (as 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 Flagship. Each of FT-B, EIP LLC (as the general partner of FT-B) and Mr. Kobler (as 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 Form 4 are made by the investment committee of EIP LLC, which is comprised of seven individuals,
F5(Continued from footnote 4) including Mr. Kobler, Lindsay Luger and Sameer Reddy, each of whom is a nominee to the Issuer's Board. Each member of this investment committee disclaims beneficial ownership of all securities described by this Form 4 except to the extent of his or her pecuniary interest therein.
F6The Issuer used approximately $119.9 million of the net proceeds from the closing of the Offering to purchase 6,041,206 Class B Units from Flagship. An equal number of shares of the Issuer's Class B common stock were cancelled in connection with the repurchase of the Class B Units.
F7Shares of the Issuer's Class B common stock ("Class B Common Stock") have no economic value and have one vote per share. One share of Class B Common Stock is issued for each Class B Unit ("Class B Units") of Enchanted Rock Holdings, LLC ("ER Holdings") held. Upon an exchange of Class B Units for shares of the Issuer's Class A common stock ("Class A Common Stock"), an equivalent number of shares of Class B Common Stock held by such holder will be automatically cancelled.
F8The Class B Units are exchangeable, at the holder's option, on a one-for-one basis into shares of Class A Common Stock.