Comfort Systems USA (FIX) director reports sale of 500 shares

Rhea-AI Filing Summary

Comfort Systems USA director Pablo G. Mercado reported an open-market sale of 500 shares of Common Stock. The transaction took place on February 23, 2026 at an average price of $1,405.00 per share, with the price described as an average in a footnote.

After this sale, Mercado directly owns 3,500 shares of Comfort Systems USA Common Stock. The company notes that detailed price and share-breakdown information for this trade is available upon request from its Office of the General Counsel.

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

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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^*

Mercado, Pablo G.

(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)
02/23/2026

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	02/23/2026		S		500	D	$1,405(1)	3,500	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	02/24/2026
	** 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.

FAQ

What insider transaction did Pablo G. Mercado report at COMFORT SYSTEMS USA INC (FIX)?

Pablo G. Mercado reported selling 500 shares of Comfort Systems USA Common Stock in an open-market transaction. The sale occurred on February 23, 2026, at an average price of $1,405.00 per share, as disclosed in the Form 4 filing and related footnote.

At what price did the COMFORT SYSTEMS USA INC (FIX) director sell his shares?

The director’s reported sale used an average price of $1,405.00 per share. A footnote explains this is an average price and that more detailed information on individual trade prices and share amounts is available upon request from the company’s Office of the General Counsel.

How many COMFORT SYSTEMS USA INC (FIX) shares does Pablo G. Mercado own after the sale?

After the reported sale, Pablo G. Mercado directly holds 3,500 shares of Comfort Systems USA Common Stock. This post-transaction ownership figure is disclosed in the Form 4 and reflects the remaining stake following the 500-share open-market sale on February 23, 2026.

What does the Form 4 footnote say about the COMFORT SYSTEMS USA INC (FIX) share sale price?

The footnote states the reported $1,405.00 per share reflects the average sale price. It further notes that complete details on the exact number of shares sold at each specific price are available upon request from the company’s Office of the General Counsel.

Was the COMFORT SYSTEMS USA INC (FIX) insider transaction a buy or a sell?

The transaction reported by Pablo G. Mercado was a sale of Common Stock. It is classified as an open-market or private sale under transaction code “S,” with 500 shares sold and the transaction direction indicated as a sell in the Form 4 data.