Greenhouse reports 13,342,649 shares (4.1%) in Mister Car Wash

Mister Car Wash, Inc. Schedule 13G/A reports that Greenhouse Funds LLLP, Greenhouse GP LLC and Joseph Milano each beneficially own 13,342,649 shares of common stock, representing 4.1% of the class as disclosed.

Rhea-AI Filing Summary

Mister Car Wash, Inc. Schedule 13G/A reports that Greenhouse Funds LLLP, Greenhouse GP LLC and Joseph Milano each beneficially own 13,342,649 shares of common stock, representing 4.1% of the class as disclosed.

The filing shows shared power to vote of 12,031,835 shares and shared dispositive power of 13,342,649 shares. The address and citizenship of the reporting persons are provided, and joint filing and control-person exhibits are attached.

Insights

Institutional Ownership Analyst

Greenhouse-related entities report a modest sub-5% stake with shared voting and dispositive power.

The excerpt lists a beneficial ownership position of 13,342,649 shares (4.1%). It also reports shared voting power of 12,031,835 shares and identical shared dispositive power. These are explicit holdings reported on the Schedule 13G/A.

Cash‑flow treatment and timing of any transactions are not included in the excerpt; subsequent filings would show changes. The filing includes a Joint Filing Agreement and control-person identification exhibit.

Key Figures

Beneficially owned shares: 13,342,649 shares Percent of class: 4.1% Shared voting power: 12,031,835 shares +1 more

4 metrics

Beneficially owned shares 13,342,649 shares Item 4(a) reported for each reporting person

Percent of class 4.1% Item 4(b) percent of class for each reporting person

Shared voting power 12,031,835 shares Item 4(c)(ii) shared power to vote

Shared dispositive power 13,342,649 shares Item 4(c)(iv) shared power to dispose

Key Terms

Schedule 13G/A, Beneficial ownership, Shared voting power, Dispositive power

4 terms

Schedule 13G/A regulatory

"Item 1. Name of issuer: Mister Car Wash, Inc."

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficial ownership regulatory

"Item 4. Ownership (a) Amount beneficially owned: Greenhouse Funds LLLP - 13,342,649"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Shared voting power regulatory

"Item 4(c)(ii) Shared power to vote or to direct the vote: 12,031,835"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

Dispositive power regulatory

"Item 4(c)(iv) Shared power to dispose or to direct the disposition of: 13,342,649"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does Greenhouse Funds report in MCW?

Greenhouse Funds LLLP reports 13,342,649 shares, equal to 4.1% of Mister Car Wash common stock, with shared dispositive power of 13,342,649 shares.

How much voting power do the Greenhouse reporting persons hold in MCW?

The filing shows shared voting power of 12,031,835 shares for Greenhouse Funds LLLP, Greenhouse GP LLC, and Joseph Milano as reported in Item 4(c)(ii).

Are these holdings reported individually or jointly for MCW?

The report is a joint filing: Greenhouse Funds LLLP, Greenhouse GP LLC, and Joseph Milano each list the same 13,342,649 shares beneficially owned and executed a Joint Filing Agreement.

Does the filing indicate sole voting or dispositive power for the reporting persons?

No. Each reporting person indicates 0 shares of sole voting power and sole dispositive power, with the disclosed powers listed as shared authority.

What exhibits accompany this Schedule 13G/A for MCW?

The filing references Exhibit A (Joint Filing Agreement) and Exhibit B (Control Person Identification) attached to the Schedule 13G/A.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/15/2026 - 04:12 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Mister Car Wash, Inc.

(Name of Issuer)

Common stock, par value $0.01 per share

(Title of Class of Securities)

60646V105

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 60646V105

1

Names of Reporting Persons

Greenhouse Funds LLLP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 12,031,835.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 13,342,649.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

13,342,649.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.1 %

12

Type of Reporting Person (See Instructions)

IA, OO

SCHEDULE 13G

CUSIP Number(s): 60646V105

1

Names of Reporting Persons

Greenhouse GP LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 12,031,835.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 13,342,649.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

13,342,649.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.1 %

12

Type of Reporting Person (See Instructions)

HC, OO

SCHEDULE 13G

CUSIP Number(s): 60646V105

1

Names of Reporting Persons

Joseph Milano

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 12,031,835.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 13,342,649.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

13,342,649.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.1 %

12

Type of Reporting Person (See Instructions)

HC, IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Mister Car Wash, Inc.
(b)	Address of issuer's principal executive offices: 222 E. 5th Street, Tucson, Arizona 85705
Item 2.
(a)	Name of person filing: Greenhouse Funds LLLP Greenhouse GP LLC Joseph Milano
(b)	Address or principal business office or, if none, residence: Greenhouse Funds LLLP 605 S Eden St. Suite 250 Baltimore, MD 21231 Greenhouse GP LLC 605 S. Eden St. Suite 250 Baltimore, MD 21231 Joseph Milano 605 S. Eden St. Suite 250 Baltimore, MD 21231
(c)	Citizenship: Greenhouse Funds LLLP - Delaware Greenhouse GP LLC - Delaware Joseph Milano - United States
(d)	Title of class of securities: Common stock, par value $0.01 per share
(e)	CUSIP No.: 60646V105
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: Greenhouse Funds LLLP - 13,342,649 Greenhouse GP LLC - 13,342,649 Joseph Milano - 13,342,649
(b)	Percent of class: Greenhouse Funds LLLP - 4.1% Greenhouse GP LLC - 4.1% Joseph Milano - 4.1%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Greenhouse Funds LLLP - 0 Greenhouse GP LLC - 0 Joseph Milano - 0
	(ii) Shared power to vote or to direct the vote: Greenhouse Funds LLLP - 12,031,835 Greenhouse GP LLC - 12,031,835 Joseph Milano - 12,031,835
	(iii) Sole power to dispose or to direct the disposition of: Greenhouse Funds LLLP - 0 Greenhouse GP LLC - 0 Joseph Milano - 0
	(iv) Shared power to dispose or to direct the disposition of: Greenhouse Funds LLLP - 13,342,649 Greenhouse GP LLC - 13,342,649 Joseph Milano - 13,342,649
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. All of the securities reported in this Schedule 13G are directly owned by advisory clients of Greenhouse Funds LLLP. None of those advisory clients may be deemed to beneficially own more than 5% of the Common Stock, par value $0.01 per share.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. Please see Exhibit B attached hereto.
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Greenhouse Funds LLLP

Signature:	/s/ Joseph Milano*
Name/Title:	Joseph Milano, Authorized Person of the general partner
Date:	05/15/2026

Greenhouse GP LLC

Signature:	/s/ Joseph Milano*
Name/Title:	Joseph Milano, Authorized Person
Date:	05/15/2026

Joseph Milano

Signature:	/s/ Joseph Milano*
Name/Title:	Joseph Milano
Date:	05/15/2026

Comments accompanying signature: * Each Reporting Person disclaims beneficial ownership of the reported securities except to the extent of his, her or its pecuniary interest therein, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose. To the extent that "ownership of 5 percent or less of a class" was indicated in Item 5, such response only applies to the Reporting Person(s) that indicated elsewhere herein that it beneficially owns five percent (5%) or less of the class.

Exhibit Information

Exhibit A - Joint Filing Agreement Exhibit B - Control Person Identification