Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 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 that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Buck Robert M 2. Issuer Name and Ticker or Trading Symbol QXO Insulation, LLC [BLD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) CEO (Last) (First) (Middle) C/O TOPBUILD CORP., 475 NORTH WILLIAMSON BOULEVARD 3. Date of Earliest Transaction (Month/Day/Year) 07/01/2026 (Street) DAYTONA BEACH, FL 32114 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) 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) Code V Amount (A) or (D) Price Common Stock 07/01/2026 D 40,372(1) D $ 0 34,015(2) D Common Stock 07/01/2026 D 10,327(3) D $ 0 23,688 D Common Stock 07/01/2026 D 23,688(4) D $ 0 0 D

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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 Underlying Securities (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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Buck Robert M C/O TOPBUILD CORP. 475 NORTH WILLIAMSON BOULEVARD DAYTONA BEACH, FL 32114	X		CEO

Signatures

/s/ Luis F. Machado, Attorney-in-Fact		07/01/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Pursuant to the Agreement and Plan of Merger, dated as of April 18, 2026 (the "Merger Agreement), QXO, Inc. ("QXO") acquired TopBuild Corp. ("TopBuild") in a merger transaction (the "Merger") which became effective on July 1, 2026. At the effective time of the Merger (the "Effective Time"), each share (other than certain excluded shares, cancelled shares and dissenting shares) of TopBuild common stock was converted into the right to receive, at the holder's election, one of the following forms of merger consideration, after giving effect to proration as described in the Merger Agreement: (i) approximately $249.71 in cash and 10.211 shares of QXO common stock, subject to final calculations by the exchange agent (the "Cash Consideration"); or (ii) 20.200 shares of QXO common stock (the "Stock Consideration"). The reporting person elected the Cash Consideration.
(2)	Reflects tax withholding and performance share achievement on vesting.
(3)	Represents shares of TopBuild common stock underlying restricted stock unit ("RSU") awards. Pursuant to the terms of the Merger Agreement, each outstanding and not yet settled RSU award was converted into a restricted stock unit award relating to a number of shares of QXO common stock based on an equity award exchange ratio equal to the Stock Consideration, with any fractional shares rounded to the nearest whole number of shares.
(4)	Represents shares of TopBuild common stock underlying performance-based stock unit ("PRSU") awards. Pursuant to the terms of the Merger Agreement, each outstanding and not yet settled PRSU award was converted into a restricted stock unit award relating to a number of shares of QXO common stock based on an equity award exchange ratio equal to the Stock Consideration, with any fractional shares rounded to the nearest whole number of shares.

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