FIX insider Form 4: CEO-director reports November 2025 stock sale

Q: What is the insider’s relationship to Comfort Systems USA (FIX)?

The reporting person is identified as a Director and as an Officer , serving as President/Chief Executive Officer of Comfort Systems USA.

Q: What type of SEC form was filed for this Comfort Systems USA (FIX) insider trade?

The transaction was reported on Form 4 , which is required for officers, directors, and certain shareholders to disclose changes in beneficial ownership of a company’s securities.

Filing Impact

(Very High)

Filing Sentiment

(Very Negative)

Form Type

Rhea-AI Filing Summary

Comfort Systems USA, Inc. (FIX) disclosed an insider stock sale by its President and Chief Executive Officer, who is also a director. On 11/24/2025, the reporting person sold 7,158 shares of common stock in an open market transaction coded as a sale. The filing reports an average sale price of $947.9806 per share, with a note that detailed trade prices and share breakdown are available upon request from the company’s Office of the General Counsel.

After this transaction, the insider beneficially owns 180,888 shares of Comfort Systems USA common stock in direct form. The filing is made on Form 4, which is used to report changes in the ownership of company securities by officers, directors, and other insiders.

Insider Trade Summary

Net Seller: 7,158 shares ($6,785,645)

Net Sell 1 txn

Insider Lane Brian E.

Role PRESIDENT/CHIEF EXECUTIVE OFF.

Sold 7,158 shs ($6.79M)

Type	Security	Shares	Price	Value
Sale	Common Stock	7,158	$947.9806	$6.79M

Holdings After Transaction: Common Stock — 180,888 shares (Direct)

Footnotes (1)

[object Object]

Form 4 Insider Transactions: What Each Field Means →

11/25/2025 - 11:51 AM

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

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

3. Date of Earliest Transaction (Month/Day/Year)
11/24/2025

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	11/24/2025		S		7,158	D	$947.9806⁽¹⁾	180,888	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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	11/25/2025
	** 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.

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Comfort Systems USA (FIX) report on this Form 4?

The Form 4 reports that a company insider who is both President/Chief Executive Officer and a director sold 7,158 shares of Comfort Systems USA common stock on 11/24/2025.

At what price were the Comfort Systems USA (FIX) shares sold in this insider transaction?

The filing states the shares were sold at an average price of $947.9806 per share, with full information on specific prices and share amounts available from the company’s Office of the General Counsel.

How many Comfort Systems USA (FIX) shares does the insider own after the reported sale?

Following the reported transaction, the insider beneficially owns 180,888 shares of Comfort Systems USA common stock, held directly.

What is the insider’s relationship to Comfort Systems USA (FIX)?

The reporting person is identified as a Director and as an Officer, serving as President/Chief Executive Officer of Comfort Systems USA.

What type of SEC form was filed for this Comfort Systems USA (FIX) insider trade?

The transaction was reported on Form 4, which is required for officers, directors, and certain shareholders to disclose changes in beneficial ownership of a company’s securities.

Does the filing mention a Rule 10b5-1 trading plan for the Comfort Systems USA (FIX) insider sale?

The form includes a checkbox description for indicating trades under a Rule 10b5-1(c) plan, but the excerpt does not show whether that box was checked for this transaction.