Comfort Systems USA director receives stock grant

Mercado, Pablo G. reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Mercado, Pablo G. reported acquisition or exercise transactions in this Form 4 filing.

Comfort Systems USA director Pablo G. Mercado received an annual equity award of 105 shares of common stock, reported at $0.00 per share because it is a compensation grant rather than a market purchase. The grant was issued under the 2017 Omnibus Incentive Plan following the company’s annual stockholders’ meeting and is described as equal to $200,000, based on the average of the high and low share price on the meeting date. After this award, Mercado directly holds 3,105 shares of Comfort Systems USA common stock.

Insider Trade Summary

Grant/Award: 105 shares

Grant/Award 1 txn

Insider Mercado, Pablo G.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	105	$0.00	$0.00

Holdings After Transaction: Common Stock — 3,105 shares (Direct)

Footnotes (1)

1. F1. Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017. Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection at the Company's annual stockholders' meeting. This year's grant is equal to $200,000, as rounded up to the nearest whole share, based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting.

Key Figures

Shares granted: 105 shares Shares owned after grant: 3,105 shares Grant value: $200,000 +1 more

4 metrics

Shares granted 105 shares Annual equity award to Pablo G. Mercado

Shares owned after grant 3,105 shares Direct holdings following the Form 4 transaction

Grant value $200,000 Value of this year’s non-employee director grant

Price per share (reporting) $0.00/share Reported transaction price, reflecting a compensation grant

Key Terms

2017 Omnibus Incentive Plan, non-employee directors, annual stockholders' meeting, average of the high and low price

4 terms

2017 Omnibus Incentive Plan financial

"Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017."

non-employee directors financial

"Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection."

Non-employee directors are board members who do not work for the company as salaried employees and usually do not hold day-to-day management roles. They act like outside referees or independent coaches, providing oversight, asking tough questions, and protecting shareholders’ interests; investors care because these directors help ensure management is accountable, reduce conflicts of interest, and influence decisions that affect company strategy and long-term value.

annual stockholders' meeting financial

"following election or reelection at the Company's annual stockholders' meeting."

average of the high and low price financial

"based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting."

FAQ

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

COMFORT SYSTEMS USA reported that director Pablo G. Mercado received a grant of 105 shares of common stock as equity compensation. The award was made after the annual stockholders’ meeting under the company’s 2017 Omnibus Incentive Plan.

How many COMFORT SYSTEMS USA (FIX) shares did Pablo G. Mercado receive and what are his holdings now?

Pablo G. Mercado received 105 shares of COMFORT SYSTEMS USA common stock as an equity grant. Following this award, the Form 4 shows he directly owns a total of 3,105 shares of the company’s common stock.

Was Pablo G. Mercado’s COMFORT SYSTEMS USA (FIX) share grant an open-market purchase?

No, the transaction was not an open-market purchase. It was coded as a grant or award, with a reported price of $0.00 per share, reflecting equity compensation provided to Mercado as a non-employee director.

What is the reported dollar value of Pablo G. Mercado’s COMFORT SYSTEMS USA (FIX) equity grant?

The footnote states that this year’s non-employee director grant is equal to $200,000. The number of shares is based on rounding to the nearest whole share using the average of the daily high and low stock price.

Under which plan was Pablo G. Mercado’s COMFORT SYSTEMS USA (FIX) stock grant made?

The stock grant was made under COMFORT SYSTEMS USA’s 2017 Omnibus Incentive Plan. This plan, approved by stockholders on May 23, 2017, provides annual grants of common stock to non-employee directors after each annual stockholders’ meeting.

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Accepted by SEC EDGAR 05/19/2026 - 04:30 PM 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^*

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)
05/18/2026

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	05/18/2026		A		105	A	$0(1)	3,105	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. Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017. Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection at the Company's annual stockholders' meeting. This year's grant is equal to $200,000, as rounded up to the nearest whole share, based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting.

	/s/ Rachel R. Eslicker, Attorney-in-Fact	05/19/2026
	** 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)