InsiderTrades

Form 4 for EROC ERock, Inc.

Accepted 2026-06-12 18:18:03 ET · period of report 2026-06-11 · accession 0001193125-26-269848 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X Filed Traded Ticker Insider Title Type Price Qty Owned ΔOwn Value
D 2026-06-12 18:18 2026-06-11 EROC Amthor Corey Pres D - Sale to Iss — -617.4K 4.09M -13% —
D 2026-06-12 18:18 2026-06-11 EROC Amthor Corey Pres D - Sale to Iss $19.85 -617.4K 4.09M -13% -$12.26M

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Class B Common Stock 2026-06-11 D D 617,442 — 4,088,432 D — — (F1) Represents Class B Units of Enchanted Rock Holdings, LLC sold by the Reporting Person to the Issuer in connection with the closing of the Issuer's initial public offering ("IPO") at a price per Class B Unit of $19.85 (the per-share price paid by the underwriters for shares of the Class A Common Stock in the IPO, less the Reporting Person's share of offering expenses). In connection with such sale, the Issuer automatically cancelled an equivalent number of shares of Class B Common Stock held by the Reporting Person. (F1) Represents Class B Units of Enchanted Rock Holdings, LLC sold by the Reporting Person to the Issuer in connection with the closing of the Issuer's initial public offering ("IPO") at a price per Class B Unit of $19.85 (the per-share price paid by the underwriters for shares of the Class A Common Stock in the IPO, less the Reporting Person's share of offering expenses). In connection with such sale, the Issuer automatically cancelled an equivalent number of shares of Class B Common Stock held by the Reporting Person.
2 Derivative Class B Units 2026-06-11 D D 617,442 $19.85 4,088,432 D — · — to — 617,442 Class A Common Stock (F2) The Class B Units are exchangeable, at the holder's option, on a one-for-one basis into shares of Class A Common Stock of the Issuer or cash (at the Issuer's election). Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock will be automatically cancelled. (F1) Represents Class B Units of Enchanted Rock Holdings, LLC sold by the Reporting Person to the Issuer in connection with the closing of the Issuer's initial public offering ("IPO") at a price per Class B Unit of $19.85 (the per-share price paid by the underwriters for shares of the Class A Common Stock in the IPO, less the Reporting Person's share of offering expenses). In connection with such sale, the Issuer automatically cancelled an equivalent number of shares of Class B Common Stock held by the Reporting Person. (F1) Represents Class B Units of Enchanted Rock Holdings, LLC sold by the Reporting Person to the Issuer in connection with the closing of the Issuer's initial public offering ("IPO") at a price per Class B Unit of $19.85 (the per-share price paid by the underwriters for shares of the Class A Common Stock in the IPO, less the Reporting Person's share of offering expenses). In connection with such sale, the Issuer automatically cancelled an equivalent number of shares of Class B Common Stock held by the Reporting Person. (F2) The Class B Units are exchangeable, at the holder's option, on a one-for-one basis into shares of Class A Common Stock of the Issuer or cash (at the Issuer's election). Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock will be automatically cancelled. (F2) The Class B Units are exchangeable, at the holder's option, on a one-for-one basis into shares of Class A Common Stock of the Issuer or cash (at the Issuer's election). Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock will be automatically cancelled.