Comfort Systems director sells 2,500 shares

Comfort Systems USA director William J. Sandbrook sold shares in an open-market transaction.

Rhea-AI Filing Summary

Comfort Systems USA director William J. Sandbrook sold shares in an open-market transaction. On this transaction date, he sold 2,500 shares of common stock at an average price of $1,443.3177 per share, as noted in a footnote.

After the sale, Sandbrook directly owned 9,166 shares, which the footnotes state includes 170 shares held indirectly by him. The filing explains that the sale price represents an average price, and that full details on the number of shares sold at each specific price are available on request from the company’s Office of the General Counsel.

Insider Trade Summary

Net Seller: 2,500 shares

Net Sell 1 txn

Insider SANDBROOK WILLIAM J

Role Director

Sold 2,500 shs ($3.61M)

Type	Security	Shares	Price	Value
Sale	Common Stock	2,500	$1,443.3177	$3.61M

Holdings After Transaction: Common Stock — 9,166 shares (Direct)

Footnotes (2)

1. F1. Represents the average price of shares sold; full information regarding the number of shares sold and specific prices will be made available upon request to the Company's Office of the General Counsel.
2. F2. Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person.

FAQ

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What insider transaction did Comfort Systems USA (FIX) disclose?

Comfort Systems USA disclosed that director William J. Sandbrook completed an open-market sale of common stock. He sold 2,500 shares in a single reported transaction, according to the Form 4 insider filing and accompanying footnotes detailing the nature of the sale.

How many COMFORT SYSTEMS USA (FIX) shares did William J. Sandbrook sell and at what price?

William J. Sandbrook sold 2,500 shares of Comfort Systems USA common stock. The reported transaction used an average sale price of $1,443.3177 per share, with the filing noting that more detailed price and share breakdowns are available from the company’s Office of the General Counsel.

How many COMFORT SYSTEMS USA (FIX) shares does William J. Sandbrook own after this sale?

After the reported sale, William J. Sandbrook directly owned 9,166 shares of Comfort Systems USA common stock. A footnote clarifies this figure includes 170 shares held indirectly by him, consolidating his direct and certain indirect holdings into a single post-transaction total.

What do the footnotes in the COMFORT SYSTEMS USA (FIX) Form 4 reveal about Sandbrook’s sale price?

The footnotes state that the reported sale price of $1,443.3177 per share is an average price. They further explain that full information on the exact number of shares sold and the specific prices received is available upon request from the company’s Office of the General Counsel.

Is William J. Sandbrook’s COMFORT SYSTEMS USA (FIX) transaction a direct or indirect holding change?

The Form 4 indicates that the 2,500-share sale involved directly held common stock. Following the transaction, Sandbrook’s 9,166-share balance is still classified as directly held, with a footnote clarifying that this balance includes 170 shares that are held indirectly by him.

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

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 02/26/2026 - 11:51 AM EST Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED 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^*

SANDBROOK WILLIAM J

(Last) (First) (Middle)

C/O COMFORT SYSTEMS USA, INC.

9753 KATY FREEWAY, SUITE 700

(Street)

HOUSTON TX 77024

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
COMFORT SYSTEMS USA INC [ FIX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
02/24/2026

4. If Amendment, Date of 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

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	02/24/2026		S		2,500	D	$1,443.3177(1)	9,166(2)	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents the average price of shares sold; full information regarding the number of shares sold and specific prices will be made available upon request to the Company's Office of the General Counsel.

2. Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person.

	/s/ Rachel R. Eslicker, Attorney-in-Fact	02/26/2026
	** Signature of Reporting Person	Date
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.