FMR discloses 5.4% stake in Comfort Systems USA (FIX) via 13G

FMR LLC filed a Schedule 13G reporting a passive ownership stake in Comfort Systems USA, Inc. (FIX).

Rhea-AI Filing Summary

FMR LLC filed a Schedule 13G reporting a passive ownership stake in Comfort Systems USA, Inc. (FIX). FMR beneficially owns 1,892,021.47 shares of common stock, representing 5.4% of the class as of 09/30/2025. FMR reports sole voting power over 1,878,665.40 shares and sole dispositive power over 1,892,021.47 shares.

Abigail P. Johnson is also listed as a reporting person with sole dispositive power over 1,892,021.47 shares and no voting power. The filing certifies the securities were acquired and are held in the ordinary course of business and not to change or influence control. Item 6 notes one or more other persons may have rights to dividends or sale proceeds, with no single person over five percent.

Insights

Equity ownership & governance analyst

Passive 5.4% 13G stake; no control intent stated.

FMR LLC reports beneficial ownership of 1,892,021.47 shares (5.4%) of Comfort Systems USA as of 09/30/2025. It holds sole voting power over 1,878,665.40 shares and sole dispositive power over 1,892,021.47 shares. Abigail P. Johnson is a reporting person with sole dispositive power and no voting power.

The Schedule 13G certification states the position is held in the ordinary course and not for the purpose of influencing control. Item 6 indicates others may have dividend or sale proceeds rights, with no single person above five percent.

This is an ownership disclosure rather than a transaction. Actual market impact depends on holder decisions; subsequent ownership updates, if any, would appear in later filings.

FAQ

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

What stake in FIX did FMR LLC report on Schedule 13G?

FMR LLC reported beneficial ownership of 1,892,021.47 shares of Comfort Systems USA common stock, or 5.4% of the class as of 09/30/2025.

Does the filing indicate an intent to influence control at Comfort Systems USA (FIX)?

No. The certification states the securities were acquired and are held in the ordinary course of business and not to change or influence control.

What voting and dispositive powers did FMR report over FIX shares?

FMR reported sole voting power over 1,878,665.40 shares and sole dispositive power over 1,892,021.47 shares.

What did Abigail P. Johnson report regarding FIX ownership?

She reported sole dispositive power over 1,892,021.47 shares and no voting power.

Are others entitled to dividends or proceeds from the FIX shares?

Item 6 notes that one or more other persons may have such rights, with no single person over five percent.

What is the date of the event triggering this ownership report for FIX?

The event date is 09/30/2025.

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

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Accepted by SEC EDGAR 11/05/2025 - 11:30 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

COMFORT SYSTEMS USA INC

(Name of Issuer)

COMMON STOCK

(Title of Class of Securities)

199908104

(CUSIP Number)

09/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 199908104

1

Names of Reporting Persons

FMR LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,878,665.40
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,892,021.47
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,892,021.47

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.4 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP No. 199908104

1

Names of Reporting Persons

Abigail P. Johnson

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,892,021.47
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,892,021.47

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.4 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: COMFORT SYSTEMS USA INC
(b)	Address of issuer's principal executive offices: 675 BERING DRIVE,SUITE 400,HOUSTON,TX,USA,77057
Item 2.
(a)	Name of person filing: FMR LLC
(b)	Address or principal business office or, if none, residence: 245 Summer Street, Boston, Massachusetts 02210
(c)	Citizenship: Not applicable
(d)	Title of class of securities: COMMON STOCK
(e)	CUSIP No.: 199908104
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 1892021.47
(b)	Percent of class: 5.4 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Please see the responses to Items 5 and 6 on the cover page.
	(ii) Shared power to vote or to direct the vote: 0.00
	(iii) Sole power to dispose or to direct the disposition of: 1892021.47
	(iv) Shared power to dispose or to direct the disposition of: 0.00
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. One or more other persons are known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the COMMON STOCK of COMFORT SYSTEMS USA INC. No one other person's interest in the COMMON STOCK of COMFORT SYSTEMS USA INC is more than five percent of the total outstanding COMMON STOCK.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See attached Exhibit 99.
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

FMR LLC

Signature:	Stephanie J. Brown
Name/Title:	Duly authorized under Power of Attorney effective as of January 3, 2023, by and on behalf of FMR LLC and its direct and indirect subsidiaries*
Date:	11/04/2025

Abigail P. Johnson

Signature:	Stephanie J. Brown
Name/Title:	Duly authorized under Power of Attorney effective as of January 26, 2023, by and on behalf of Abigail P. Johnson**
Date:	11/04/2025

Comments accompanying signature: * This power of attorney is incorporated herein by reference to Exhibit 24 to the Schedule 13G filed by FMR LLC on January 10, 2023, accession number: 0000315066-23-000003. ** This power of attorney is incorporated herein by reference to Exhibit 24 to the Schedule 13G filed by FMR LLC on January 31, 2023, accession number: 0000315066-23-000038.

Exhibit Information

Please see Exhibit 99 for 13d-1(k) (1) agreement.