Form 8-K

8-K — COMFORT SYSTEMS USA INC

Accession: 0001104659-26-065127

Filed: 2026-05-21

Period: 2026-05-18

CIK: 0001035983

SIC: 1731 (ELECTRICAL WORK)

Item: Submission of Matters to a Vote of Security Holders

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT

REPORT

Pursuant

to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of

earliest event reported) May 18, 2026

Comfort

Systems USA, Inc.

(Exact name of registrant

as specified in its charter)

Delaware

1-13011

76-0526487

(State or other jurisdiction

(Commission

(IRS Employer

of incorporation)

File Number)

Identification No.)

9753 Katy Freeway, Suite

700

Houston,

Texas

77024

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number,

including area code (713) 830-9600

(Former name or former address, if changed

since last report.)

Check the appropriate box below if the Form 8-K

filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written

communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting

material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement

communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement

communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title

of each class

Trading

Symbol(s)

Name

of each exchange on which registered

Common

Stock, $0.01 par value

FIX

New

York Stock Exchange

Indicate by check mark whether the registrant

is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the

Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check

mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting

standards provided pursuant to Section 13(a) of the Exchange Act. ¨

ITEM 5.07 Submission of Matters to a Vote of Security

Holders.

On May 18, 2026, the Company

held its 2026 Annual Meeting of Stockholders. Of the 35,183,967 shares of common stock outstanding and entitled to vote at the Annual

Meeting, 31,221,297 shares were present in person or by proxy, constituting a 88.74% quorum. The matters submitted to the stockholders

of the Company at the Annual Meeting, and the results of the voting, were as follows:

Proposal No. 1.        Vote regarding the

election of Darcy G. Anderson, Herman E. Bulls, Rhoman J. Hardy, Gaurav Kapoor, Brian E. Lane, Pablo G. Mercado, Franklin Myers, William

J. Sandbrook, Constance E. Skidmore, and Cindy L. Wallis-Lage as members of the Board of Directors:

Nominee

Votes For

Votes For as Percentage of

Votes Cast

Votes Withheld

Darcy G. Anderson

28,500,680

96.83%

932,079

Herman E. Bulls

27,416,615

93.15%

2,016,144

Rhoman J. Hardy

28,249,108

95.98%

1,183,651

Gaurav Kapoor

29,347,139

99.71%

85,620

Brian E. Lane

29,198,093

99.20%

234,666

Pablo G. Mercado

29,181,029

99.14%

251,730

Franklin Myers

27,828,822

94.55%

1,603,937

William J. Sandbrook

27,552,098

93.61%

1,880,661

Constance E. Skidmore

28,169,131

95.71%

1,263,628

Cindy L. Wallis-Lage

26,260,153

89.22%

3,172,606

There were 1,788,538 broker non-votes as to Proposal

No. 1.

Proposal No. 2.        Vote regarding ratification

of the appointment of Deloitte & Touche LLP as the Company’s independent registered public accounting firm for the year ending

December 31, 2026:

Votes For

Votes For as a Percentage

of Votes Cast

Votes Against

Votes Abstain

31,195,684

99.97%

10,699

14,912

There were no broker non-votes as to Proposal

No. 2.

Proposal No. 3.       Advisory vote regarding

approval of the compensation paid by the Company to its named executive officers:

Votes For

Votes For as a Percentage

of Votes Cast

Votes Against

Votes Abstain

28,296,391

96.41%

1,053,045

83,323

There were 1,788,538 broker non-votes as to Proposal No. 3.

SIGNATURES

Pursuant to the requirements

of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto

duly authorized.

COMFORT SYSTEMS USA, INC.

By:

/s/ Rachel R. Eslicker

Rachel R. Eslicker, Senior Vice President and General Counsel

Date: May 21, 2026

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Entity Tax Identification Number

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Entity Incorporation, State or Country Code

Entity Address, Address Line One

9753 Katy Freeway

Entity Address, Address Line Two

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Entity Address, City or Town

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Entity Address, State or Province

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City Area Code

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Local Phone Number

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FIX

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