[Form 4] Comfort Systems USA, Inc. Insider Trading Activity

Rhea-AI Filing Summary

What happened: Lane Brian E., who is both a director and the President/Chief Executive Officer of Comfort Systems USA, Inc., reported an insider sale of company common stock.

Key details: The Form 4 shows a disposition on 08/07/2025, reporting 10,000 shares sold at an average price listed as $691.7439, and a remaining beneficial ownership of 188,046 shares after the transaction. The filing was signed by an attorney-in-fact on 08/08/2025. The form publicly records the sale and the insider's updated stake.

Positive

• Transaction was publicly disclosed on Form 4, providing transparency about insider activity

Negative

• Insider disposition of 10,000 shares reported, reducing holdings to 188,046 shares

Insights

Securities Analyst

TL;DR: CEO sold 10,000 shares, leaving 188,046 shares; sale disclosed on Form 4, impact depends on context not provided here.

The filing documents a direct sale by Lane Brian E. on 08/07/2025 of 10,000 shares at an average price recorded as $691.7439, leaving a post-transaction holding of 188,046 shares. The form does not provide market context, reasons for the sale, or confirm use of a trading plan, so the economic impact on valuation or investor sentiment cannot be determined from this filing alone.

Corporate Governance Expert

TL;DR: Insider sale properly disclosed; governance record shows transaction and signature by an attorney-in-fact.

The report identifies Lane Brian E. as both a director and the company’s President/Chief Executive Officer and registers the 08/07/2025 disposition. The Form 4 is signed by an attorney-in-fact, confirming procedural completion. The filing does not indicate that the sale was made under a 10b5-1 trading plan, and it provides an average price with a note that more detailed price information is available upon request. Investors should track subsequent filings for patterns or additional context.

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.

675 BERING DRIVE, SUITE 400

(Street)

HOUSTON TX 77057

(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)
08/07/2025

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/07/2025		S		10,000	D	$691.7439(1)	188,046	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	08/08/2025
	** 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.

FAQ

What did Lane Brian E. report in the Form 4 for FIX?

He reported a sale on 08/07/2025 of 10,000 shares of Comfort Systems USA, Inc. common stock, with an average price listed as $691.7439.

How many Comfort Systems (FIX) shares does Lane Brian E. own after the sale?

The Form 4 shows a post-transaction beneficial ownership of 188,046 shares.

When was the Form 4 signed and who signed it?

The filing is signed by attorney-in-fact Rachel R. Eslicker on 08/08/2025.

Was the sale reported as part of a 10b5-1 trading plan?

The filing includes the standard checkboxes but does not indicate that the transaction was made pursuant to a 10b5-1 trading plan.

Where can I get more detailed pricing information about the sale?

The filing states that 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.