Comfort Systems CEO sells 11,113 shares

COMFORT SYSTEMS USA INC director and chief executive officer Brian E. Lane reported an open-market sale of Common Stock.

Rhea-AI Filing Summary

COMFORT SYSTEMS USA INC director and chief executive officer Brian E. Lane reported an open-market sale of Common Stock. On May 5, 2026, he sold 11,113 shares at an average price of $1969.838 per share, as noted in a footnote. Following this transaction, Lane directly holds 161,089 shares of the company’s common stock, indicating he retained a substantial equity position after the sale.

Insights

Equity compensation and insider-trading analyst

CEO Brian Lane’s sale is a modest, routine trim of his FIX holdings.

CEO and director Brian E. Lane executed an open-market sale of 11,113 Common Stock shares at an average price of $1969.838 per share. The footnote states this is an average price, with detailed trade data available from the company’s Office of the General Counsel.

After the sale, Lane directly holds 161,089 shares, so the transaction represents a relatively small portion of his visible stake. There are no derivative positions listed in this filing, and no reference to a Rule 10b5-1 plan in the provided excerpt, making this look like a straightforward discretionary sale of a minority slice of his holdings.

Insider Trade Summary

Net Seller: 11,113 shares

Net Sell 1 txn

Insider Lane Brian E.

Role CHIEF EXECUTIVE OFF.

Sold 11,113 shs ($21.89M)

Type	Security	Shares	Price	Value
Sale	Common Stock	11,113	$1,969.838	$21.89M

Holdings After Transaction: Common Stock — 161,089 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: 11,113 shares Average sale price: $1969.838 per share Shares held after sale: 161,089 shares

3 metrics

Shares sold 11,113 shares Open-market sale of Common Stock on May 5, 2026

Average sale price $1969.838 per share Average price for shares sold in the reported transaction

Shares held after sale 161,089 shares Direct ownership following the reported sale

Key Terms

open-market sale, average price, Office of the General Counsel, transaction code

4 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.

average price financial

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

Office of the General Counsel regulatory

"made available upon request to the Company's Office of the General Counsel."

transaction code regulatory

""transaction_code": "S","transaction_type": "non-derivative""

FAQ

What insider transaction did COMFORT SYSTEMS USA (FIX) report for Brian E. Lane?

COMFORT SYSTEMS USA reported that CEO and director Brian E. Lane executed an open-market sale of common stock. He sold 11,113 shares on May 5, 2026, at an average price of $1969.838 per share, according to the Form 4 filing and accompanying footnote.

How many COMFORT SYSTEMS USA (FIX) shares did Brian Lane sell in this Form 4?

Brian Lane sold 11,113 shares of COMFORT SYSTEMS USA common stock. The sale was reported as an open-market transaction, with the Form 4 indicating this as a single non-derivative sale and summarizing the total number of shares disposed of in that transaction.

At what average price were Brian Lane’s FIX shares sold?

The shares were sold at an average price of $1969.838 per share. A footnote explains this is an average price and that full details of the number of shares sold at each specific price are available on request from the company’s Office of the General Counsel.

How many COMFORT SYSTEMS USA (FIX) shares does Brian Lane hold after the sale?

After the reported sale, Brian Lane directly holds 161,089 shares of COMFORT SYSTEMS USA common stock. This post-transaction ownership figure indicates he continues to maintain a substantial equity position in the company despite the open-market sale disclosed in the filing.

Was Brian Lane’s COMFORT SYSTEMS USA (FIX) sale a buy, sell, or other type of transaction?

The transaction was a sell. The Form 4 uses transaction code “S” and describes it as an open-market sale, with the normalized transaction fields confirming it as a sell transaction rather than a purchase, option exercise, gift, or tax-withholding disposition.

Does the Form 4 for COMFORT SYSTEMS USA (FIX) mention any derivative positions for Brian Lane?

The Form 4 excerpt shows no derivative transactions or remaining derivative positions for Brian Lane. The derivativeSummary section is empty, indicating that, in this filing, only a non-derivative open-market sale of common stock was reported, with no options or similar securities listed.

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Accepted by SEC EDGAR 05/06/2026 - 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^*

Lane Brian E.

(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
X	Officer (give title below)		Other (specify below)
	CHIEF EXECUTIVE OFF.

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/05/2026

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	05/05/2026		S		11,113	D	$1,969.838(1)	161,089	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	05/06/2026
	** 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)