STOCK TITAN

ERock (EROC) president sells 617K Class B Units to issuer in IPO

Filing Impact
(Very High)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

ERock, Inc. president Corey Amthor reported IPO-related transactions involving the company’s dual-class structure. On June 11, 2026, he disposed of 617,442 Class B Units of Enchanted Rock Holdings, LLC to the issuer at $19.85 per unit in connection with the closing of ERock’s initial public offering. In conjunction with this sale, an equivalent 617,442 shares of Class B Common Stock held by Amthor were automatically cancelled. After these moves, he held 4,088,432 shares of Class B Common Stock directly and 1,534,876 shares indirectly through Amthor Family Holdings, Ltd., while the Class B Units remain exchangeable one-for-one into Class A Common Stock or cash at the issuer’s election.

Positive

  • None.

Negative

  • None.
Insider Amthor Corey
Role President
Type Security Shares Price Value
Disposition Class B Units 617,442 $19.85 $12.26M
Disposition Class B Common Stock 617,442 $0.00 --
holding Class B Common Stock -- -- --
Holdings After Transaction: Class B Units — 4,088,432 shares (Direct, null); Class B Common Stock — 4,088,432 shares (Direct, null); Class B Common Stock — 1,534,876 shares (Indirect, By Amthor Family Holdings, Ltd.)
Footnotes (1)
  1. 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. 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.
Units disposed 617,442 Class B Units Disposed to issuer at closing of IPO
Disposition price $19.85 per Class B Unit Price equals underwriters’ Class A share price less expenses
Shares cancelled 617,442 Class B Common shares Automatically cancelled upon unit sale to issuer
Direct Class B holdings after 4,088,432 shares Class B Common Stock held directly by Corey Amthor
Indirect Class B holdings after 1,534,876 shares Class B Common Stock via Amthor Family Holdings, Ltd.
Class B Units financial
"Represents Class B Units of Enchanted Rock Holdings, LLC sold by the Reporting Person to the Issuer"
initial public offering financial
"sold by the Reporting Person to the Issuer in connection with the closing of the Issuer's initial public offering"
An initial public offering (IPO) is when a private company first sells its shares to the public and becomes a stock-listed company. It matters because it allows the company to raise money from a wide range of investors, helping it grow, while giving early shareholders a way to sell some of their ownership.
disposition to issuer financial
"transaction_code_description": "Disposition to issuer""
exchangeable financial
"The Class B Units are exchangeable, at the holder's option, on a one-for-one basis"
Class A Common Stock financial
"into shares of Class A Common Stock of the Issuer or cash"
Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.
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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Amthor Corey

(Last)(First)(Middle)
C/O EROCK, INC.
1113 VINE STREET, SUITE 101

(Street)
HOUSTON TEXAS 77002

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
ERock, Inc. [ EROC ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
President
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/11/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Class B Common Stock06/11/2026D(1)617,442D(1)4,088,432D
Class B Common Stock1,534,876IBy Amthor Family Holdings, Ltd.
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Class B Units(2)06/11/2026D(1)617,442 (2) (2)Class A Common Stock617,442$19.85(1)4,088,432D
Explanation of Responses:
1. 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. 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.
/s/ Davis Zapffe, Attorney-in-Fact for Corey Amthor06/12/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did ERock (EROC) president Corey Amthor report?

Corey Amthor reported disposing of 617,442 Class B Units to ERock at $19.85 per unit. In connection with this sale, the company automatically cancelled 617,442 related shares of Class B Common Stock that he held directly.

How is Corey Amthor’s ERock (EROC) transaction linked to the IPO?

The sale of 617,442 Class B Units occurred in connection with the closing of ERock’s initial public offering. The price matched the underwriters’ per-share price for Class A Common Stock, adjusted for Amthor’s share of offering expenses.

What are ERock (EROC) Class B Units and how can they be exchanged?

ERock’s Class B Units are exchangeable at the holder’s option on a one-for-one basis into Class A Common Stock or cash. When a Class B Unit is exchanged, the corresponding share of Class B Common Stock is automatically cancelled by the issuer.

How many ERock (EROC) Class B Common shares does Corey Amthor hold after the filing?

Following the reported transactions, Corey Amthor holds 4,088,432 shares of Class B Common Stock directly. He also has indirect ownership of 1,534,876 additional Class B Common shares through Amthor Family Holdings, Ltd., as disclosed in the Form 4.

Was Corey Amthor’s ERock (EROC) transaction an open-market sale?

No. The Form 4 describes a disposition to the issuer, not an open-market sale. Amthor sold 617,442 Class B Units directly to ERock, which then automatically cancelled an equivalent number of his Class B Common Stock shares.

What transaction code was used in Corey Amthor’s ERock (EROC) Form 4?

The Form 4 uses transaction code “D,” indicating a disposition to the issuer. This code applies both to the 617,442 Class B Units sold to ERock and to the related reduction in Class B Common Stock that was automatically cancelled.