Mark R. Matteson - 20 Apr 2026 Form 4 Insider Report for Suncrete, Inc. (RMIX)

Reporting relationship: Director
Issuer ticker: RMIX
Reported as of: 20 Apr 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 22 Apr 2026, 18:01:25 UTC
Prior SEC filing: 26 Aug 2024
Source filing: View source filing
Reporting owner signature: /s/ Mark R. Matteson

Key filing fact

Mark R. Matteson filed Form 4 for Suncrete, Inc. (RMIX) on 22 Apr 2026.

Key facts

This page summarizes Mark R. Matteson's Form 4 filing for Suncrete, Inc. (RMIX).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 22 Apr 2026, 18:01.

Change

Previous filing in this sequence was filed on 26 Aug 2024.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001739134 Primary reporting owner

Matteson Mark R

Relationship: Director
Address: 5420 LBJ FREEWAY, SUITE 950, DALLAS
Signature: /s/ Mark R. Matteson
Signature date: 22 Apr 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

RMIX transaction Derivative

Class B Common Stock

Award

Transaction value
Shares: +96,000
Change %
Price: $0.000000^*
Shares after: 96,000
Date: 20 Apr 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 96,000
Exercise price
Footnotes: F1, F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Each share of Class B Common Stock, par value $0.0001 per share ("Class B Common Stock"), of Suncrete, Inc. (the "Issuer") is convertible at any time at the option of the holder thereof into one share of Class A Common Stock, par value $0.0001 per share, of the Issuer ("Class A Common Stock"). In addition, upon the election of the holders of a majority of the then-outstanding shares of Class B Common Stock, all outstanding shares of Class B Common Stock will be converted into shares of Class A Common Stock. Further, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock upon any transfer, whether or not for value, except upon certain transfers described in the Issuer's amended and restated certificate of incorporation. The holders of Class A Common Stock and Class B Common Stock vote as a single class on all matters submitted to a vote of stockholders.

Footnote F2

The holders of Class A Common Stock are entitled to one vote per share and the holders of the Class B Common Stock are entitled to 10 votes per share. The shares of Class B Common Stock do not expire.

Footnote F3

Represents 96,000 restricted shares of Class B Common Stock with time-based vesting criteria granted to Mr. Matteson under the Suncrete, Inc. 2026 Omnibus Incentive Plan that vest as follows: (i) 64,000 shares on April 20, 2028, and (ii) 32,000 shares on April 20, 2029; provided, that Mr. Matteson is providing services to the Issuer through each such date. Under the terms of the award agreement, Mr. Matteson has sole voting power with respect to the shares.

SEC remarks

On April 8, 2026, Mr. Matteson filed a Form 3 which reported that he may be deemed to beneficially own securities of the Issuer directly held by Dothan Concrete Investors, LLC due to his position as an executive officer of SunTx Capital Management Corp. Mr. Matteson was not an executive officer of SunTx Management Corp. as of April 8, 2026, and does not beneficially own any securities of the Issuer directly held by SunTx Capital Management Corp. As a result, such securities are not included on this Form 4.