Comfort Systems USA (NYSE: FIX) director reports open-market sale of 500 shares

Rhea-AI Filing Summary

COMFORT SYSTEMS USA INC director Pablo G. Mercado reported an open-market sale of company stock. He sold 500 shares of Common Stock on April 30, 2026 at an average price of $1,779.7801 per share, and held 3,000 shares directly after the transaction.

The reported price represents an average for multiple trades; the company notes that detailed share amounts and specific prices for each trade are available from its Office of the General Counsel upon request.

Insider Trade Summary

Net Seller: 500 shares ($889,890)

Net Sell 1 txn

Insider Mercado, Pablo G.

Role null

Sold 500 shs ($890K)

Type	Security	Shares	Price	Value
Sale	Common Stock	500	$1,779.7801	$890K

Holdings After Transaction: Common Stock — 3,000 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 500 shares Average sale price: $1,779.7801 per share Shares held after transaction: 3,000 shares

3 metrics

Shares sold 500 shares Open-market sale of Common Stock on April 30, 2026

Average sale price $1,779.7801 per share Average price for multiple trades in the reported sale

Shares held after transaction 3,000 shares Direct ownership following the April 30, 2026 sale

Key Terms

open-market sale, Common Stock, average price

3 terms

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"security_title: "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

average price financial

"Represents the average price of shares sold"

Form 4 Insider Transactions: What Each Field Means →

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^*

Mercado, Pablo G.

(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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/30/2026

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	04/30/2026		S		500	D	$1,779.7801(1)	3,000	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	05/01/2026
	** 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)

FAQ

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

COMFORT SYSTEMS USA director Pablo G. Mercado reported an open-market sale of 500 shares of Common Stock. The transaction occurred on April 30, 2026, and was disclosed in a Form 4 filing with the SEC as a routine insider sale.

At what price did Pablo G. Mercado sell COMFORT SYSTEMS USA (FIX) shares?

Pablo G. Mercado sold 500 COMFORT SYSTEMS USA Common Stock shares at an average price of $1,779.7801 per share. The filing states this figure is an average; detailed trade prices and share breakdowns are available from the company’s Office of the General Counsel.

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

After selling 500 shares, Pablo G. Mercado directly holds 3,000 shares of COMFORT SYSTEMS USA Common Stock. This post-transaction balance is reported in the Form 4 and reflects his direct ownership position following the April 30, 2026 sale.

Was Pablo G. Mercado’s COMFORT SYSTEMS USA (FIX) trade an open-market sale?

Yes. The Form 4 describes the transaction as an open-market sale of Common Stock, using transaction code “S.” This code indicates a sale in the open market or a private transaction, rather than a grant, option exercise, tax withholding, or gift.

Does the COMFORT SYSTEMS USA (FIX) Form 4 mention multiple trade prices for the sale?

Yes. The filing explains the reported $1,779.7801 price is an average of multiple trade prices. It notes that full details on the exact number of shares sold at each specific price are available from the company’s Office of the General Counsel upon request.