Comfort Systems USA director sells 1,500 shares

COMFORT SYSTEMS USA INC director William J. Sandbrook completed an open-market sale of Common Stock.

Rhea-AI Filing Summary

COMFORT SYSTEMS USA INC director William J. Sandbrook completed an open-market sale of Common Stock. On April 29, 2026, he sold 1,500 shares at an average price of $1,732.6667 per share. Following the sale, he holds 7,666 shares, including 170 shares held indirectly, as disclosed in the filing.

Insider Trade Summary

Net Seller: 1,500 shares

Net Sell 1 txn

Insider SANDBROOK WILLIAM J

Role Director

Sold 1,500 shs ($2.60M)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,500	$1,732.6667	$2.60M

Holdings After Transaction: Common Stock — 7,666 shares (Direct)

Footnotes (2)

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.
2. F2. Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person.

Key Figures

Shares sold: 1,500 shares Average sale price: $1,732.6667 per share Shares held after transaction: 7,666 shares +2 more

5 metrics

Shares sold 1,500 shares Open-market sale on April 29, 2026

Average sale price $1,732.6667 per share Form 4, footnote explaining averaged price

Shares held after transaction 7,666 shares Post-sale holdings including indirect shares

Indirectly held shares 170 shares Included within total 7,666 shares held

Net shares sold 1,500 shares Net-sell direction per transactionSummary

Key Terms

open-market sale, Common Stock, transaction code "S", indirectly, +1 more

5 terms

open-market sale financial

"Transaction action described as an open-market sale of Common Stock"

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 for the reported transaction is 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.

transaction code "S" financial

"Transaction uses code "S" indicating a sale transaction"

indirectly financial

"Footnote notes 170 shares are held indirectly by the reporting person"

beneficial ownership financial

"Footnote language reflects direct and indirect beneficial ownership structure"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

FAQ

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

What insider transaction did Comfort Systems USA (FIX) report for William J. Sandbrook?

Comfort Systems USA reported that director William J. Sandbrook executed an open-market sale of Common Stock. He sold 1,500 shares on April 29, 2026, at an average price of $1,732.6667 per share, according to the Form 4 filing’s transaction details and footnotes.

How many Comfort Systems USA (FIX) shares does William J. Sandbrook hold after the sale?

After the reported sale, William J. Sandbrook holds a total of 7,666 Comfort Systems USA shares. The filing states this figure includes 170 shares held indirectly, meaning not all of his beneficial ownership is in a direct personal account.

Was the Comfort Systems USA (FIX) insider transaction an open-market sale?

Yes, the Form 4 identifies the transaction as an open-market sale of Common Stock. The transaction code is “S,” with the narrative description specifying a sale in an open market or private transaction, consistent with a discretionary sale rather than a grant or tax withholding.

What price did William J. Sandbrook receive per Comfort Systems USA (FIX) share?

The Form 4 discloses an average sale price of $1,732.6667 per share for the 1,500 shares sold. A footnote explains this figure is an average, and more detailed price and share breakdowns are available from the company’s Office of the General Counsel upon request.

Does the Comfort Systems USA (FIX) Form 4 mention indirect share ownership for William J. Sandbrook?

Yes. A footnote explains that the 7,666 shares reported as held by William J. Sandbrook include 170 shares held indirectly. This indicates a portion of his beneficial ownership is held through another account or arrangement rather than solely in his direct name.

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

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

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

SANDBROOK WILLIAM J

(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)
04/29/2026

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	04/29/2026		S		1,500	D	$1,732.6667(1)	7,666(2)	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.

2. Shares held directly by the Reporting Person, including 170 shares held indirectly by the Reporting Person.

	/s/ Rachel R. Eslicker, Attorney-in-Fact	04/30/2026
	** 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)