SEC Form 3 · accession 0001493152-26-041631

ERock, Inc. · EROC

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

10% Owner

Period of report

Jun 9, 2026

Accepted (ET)

Sep 4, 2026 · 8:35 pm EDT

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0002110029

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Class B common stock, par value $0.01^F1	holding	—	—		—	6,368,562	D
Class B common stock, par value $0.01^F1,F2	holding	—	—		—	16,633,122	I	By McAndrew Holdings, Ltd.

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Class B Units^F3	—	holding	—	—	—	—	—	Class A common stock, par value $0.01	6,368,562	—	D
Class B Units^F2,F3	—	holding	—	—	—	—	—	Class A common stock, par value $0.01	16,633,122	—	I

F1Shares of the Class B common stock, par value $0.01 per share (such shares, "Class B Shares"), of ERock, Inc. (the "Issuer") have no economic value and entitle the holder to one vote per Class B Share held. One Class B Share was issued for each Class B membership interest (each, a "Class B Unit") of Enchanted Rock Holdings, LLC ("ER Holdings") held.
F2These securities are owned directly by McAndrew Holdings, Ltd. ("Holdings"). Walter Thomas McAndrew, Jr. ("Mr. McAndrew") may be deemed to share voting and investment power over the securities held by Holdings in his capacity as a manager of McAndrew Holdings, LLC, the general partner of Holdings. Mr. McAndrew disclaims beneficial ownership of the securities held by Holdings except to the extent of his pecuniary interest therein.
F3The Class B Units of ER Holdings are exchangeable, at the holder's option, on a one-for-one basis into shares of the Issuer's Class A common stock, par value $0.01 per share (such shares, "Class A Shares"). Upon the exchange of Class B Units into Class A Shares, an equivalent number of Class B Shares will be automatically cancelled.