Comfort Systems CEO sells 16,024 shares at $1,608

COMFORT SYSTEMS USA INC (FIX) reported that Chief Executive Officer and director Brian E. Lane sold 16,024 shares of common stock on 2026-08-26 in an open-market or private transaction.

Rhea-AI Filing Summary

COMFORT SYSTEMS USA INC (FIX) reported that Chief Executive Officer and director Brian E. Lane sold 16,024 shares of common stock on 2026-08-26 in an open-market or private transaction. The shares were sold at an average price of $1,608.2079 per share, and Lane now holds 145,065 shares directly.

The reported price represents the average of multiple sale prices; more detailed trade-level pricing is available from the company’s Office of the General Counsel. The transaction was not reported as made pursuant to a Rule 10b5-1 trading plan.

Insider Trade Summary

Net Seller: 16,024 shares

Net Sell 1 txn

Insider Lane Brian E.

Role CHIEF EXECUTIVE OFF.

Sold 16,024 shs ($25.77M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	16,024	$1,608.2079	$25.77M

Holdings After Transaction: Common Stock — 145,065 shares (Direct)

Footnotes (1)

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.

Key Figures

Shares sold: 16,024 shares of Common Stock Average sale price: $1,608.2079 per share Shares owned after transaction: 145,065 shares of Common Stock

3 metrics

Shares sold 16,024 shares of Common Stock Sale by CEO Brian E. Lane on 2026-08-26

Average sale price $1,608.2079 per share Average price of shares sold on 2026-08-26, per footnote

Shares owned after transaction 145,065 shares of Common Stock Direct holdings of Brian E. Lane following the reported sale

Key Terms

average price, open market or private transaction, Office of the General Counsel, Rule 10b5-1

4 terms

average price financial

"Represents the average price of shares sold; full information regard"

open market or private transaction financial

"transaction code description: Sale in open market or private tran"

Office of the General Counsel regulatory

"prices will be made available upon request to the Company's Offic"

Rule 10b5-1 regulatory

"aff_10b5_one checkbox indicates Rule 10b5-1 trading plan status"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

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

What insider transaction did FIX disclose for Brian E. Lane?

Brian E. Lane, Chief Executive Officer and director, sold 16,024 shares of Comfort Systems USA common stock on 2026-08-26 in an open-market or private transaction, according to the Form 4 filing.

At what price were the shares of FIX sold by Brian E. Lane?

The reported sale price was an average of $1,608.2079 per share. A footnote states this is an average price; full details of the number of shares sold at each specific price are available from the company’s Office of the General Counsel.

How many FIX shares does Brian E. Lane own after this transaction?

After selling 16,024 shares, Brian E. Lane directly owns 145,065 shares of Comfort Systems USA common stock, as reported in the Form 4.

Was Brian E. Lane’s FIX stock sale under a Rule 10b5-1 trading plan?

No. The Form 4’s Rule 10b5-1 checkbox is not marked, indicating this transaction was not reported as made pursuant to a Rule 10b5-1 trading plan.

What does the Form 4 footnote say about the FIX sale price?

The footnote explains that the reported price represents the average price of shares sold. The company states that detailed information on the number of shares sold and specific prices is available upon request from its Office of the General Counsel.

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

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Available on EDGAR 08/27/2026 - 04:31 PM EDT Accepted by SEC EDGAR 08/27/2026 - 04:30 PM EDT 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^*

Lane Brian E.

(Last) (First) (Middle)

C/O COMFORT SYSTEMS USA, INC.

9753 KATY FREEWAY, SUITE 700

(Street)

HOUSTON TEXAS 77024

(City) (State) (Zip)

UNITED STATES

(Country)

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
X	Officer (give title below)		Other (specify below)
	CHIEF EXECUTIVE OFF.

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/26/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/26/2026		S		16,024	D	$1,608.2079(1)	145,065	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.

	/s/ Rachel R. Eslicker, Attorney-in-Fact	08/27/2026
	** 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.
* Form 4: SEC 1474 (03-26)