Comfort Systems USA CFO sells 2,554 shares

COMFORT SYSTEMS USA INC (FIX) reported that its Chief Financial Officer, William George III, sold common stock in an open-market or private transaction.

Rhea-AI Filing Summary

COMFORT SYSTEMS USA INC (FIX) reported that its Chief Financial Officer, William George III, sold common stock in an open-market or private transaction. He disposed of 2,554 shares on 2026-08-17 at a footnote-qualified average price of $1,859.6513 per share, and now directly holds 30,250 shares of common stock. The reported price represents an average across multiple sale prices; detailed trade-level information is available from the company’s Office of the General Counsel upon request.

Insider Trade Summary

Net Seller: 2,554 shares

Net Sell 1 txn

Insider GEORGE WILLIAM III

Role CHIEF FINANCIAL OFFICER

Sold 2,554 shs ($4.75M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	2,554	$1,859.6513	$4.75M

Holdings After Transaction: Common Stock — 30,250 shares (Direct)

Footnotes (1)

1. F1. 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.

Key Figures

Shares sold: 2,554 shares Average sale price: $1,859.6513 per share Shares held after transaction: 30,250 shares +1 more

4 metrics

Shares sold 2,554 shares Non-derivative common stock sold by CFO on 2026-08-17

Average sale price $1,859.6513 per share Weighted average price for the reported sale transaction, footnote-qualified

Shares held after transaction 30,250 shares Direct common stock ownership by CFO following the sale

Net shares sold 2,554 shares Net buy/sell direction in transaction summary (net-sell)

Key Terms

Sale in open market or private transaction, weighted average price, non-derivative

3 terms

Sale in open market or private transaction financial

"transaction code description is “Sale in open market or private transaction”"

weighted average price financial

"Represents the average price of shares sold; full information regarding the number"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

non-derivative financial

"transaction_type is listed as non-derivative for the common stock sale"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did FIX report for its CFO William George III?

COMFORT SYSTEMS USA INC (FIX) reported that CFO William George III sold 2,554 shares of common stock on 2026-08-17. The sale was reported as a code S transaction, indicating an open-market or private sale of non-derivative securities.

At what price did the FIX CFO sell shares in this Form 4 filing?

The CFO’s sale was reported at an average price of $1,859.6513 per share. This price is a weighted average across multiple trades; the company states that detailed share amounts and individual prices are available upon request from its Office of the General Counsel.

How many COMFORT SYSTEMS USA INC (FIX) shares did the CFO retain after the sale?

After selling 2,554 shares, the CFO directly holds 30,250 shares of COMFORT SYSTEMS USA INC common stock. This figure reflects his direct ownership position immediately following the reported transaction and does not include any other potential indirect or derivative interests not shown here.

Was the FIX CFO’s share sale made under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5-1 checkbox is not checked, and there is no footnote indicating a trading plan. Based on this report, the sale is not described as being executed pursuant to a pre-arranged Rule 10b5-1 trading plan.

What is the total number of FIX shares sold by the CFO in this Form 4 filing?

The Form 4 reports that the CFO sold 2,554 shares of COMFORT SYSTEMS USA INC common stock. The transaction summary characterizes this as a net sell of 2,554 shares, with no offsetting reported purchases or derivative exercises in this particular filing.

How is the transaction in FIX stock classified in the Form 4?

The transaction is classified with code S, described as a “Sale in open market or private transaction.” It involves non-derivative common stock held directly by the CFO, rather than options or other derivative securities, according to the structured data in the filing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/18/2026 - 06:00 PM Accepted by SEC EDGAR 08/18/2026 - 06:00 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^*

GEORGE WILLIAM III

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CHIEF FINANCIAL OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/17/2026

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	08/17/2026		S		2,554	D	$1,859.6513(1)	30,250	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	08/18/2026
	** 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)