NYSE · Common Stock · Electrical Work
92 entities across 26 jurisdictions, 1 in offshore financial centres. Read directly from the company’s own 10-K EX-21 filed 2026-02-19 — see the exhibit.
Which other public companies file entities in the same places:
| Entity | Jurisdiction | Note |
|---|---|---|
| ACI Mechanical, Inc. | Delaware | |
| Air Systems Engineering, Inc. | Washington | |
| AirTemp, Inc. | Maine | |
| Altrax Tool and Equipment Co LLC | Tennessee | |
| Amteck Holdco LLC | Delaware | |
| Amteck Sprinkler LLC | Delaware | |
| Amteck, LLC | Kentucky | |
| Armani East LLC | New York | |
| Associated Boiler Systems, Inc. | Indiana | |
| Atlantic Electric, LLC | South Carolina | |
| BCH Holdings, Inc. | Florida | |
| BCH Leasing, LLC | Florida | |
| BCH Mechanical, L.L.C. | Florida | |
| BCM Controls Corporation | Massachusetts | |
| Billone West LLC | New York | |
| Brick & Mortar Ventures II, L.P. | Delaware | |
| Brick & Mortar Ventures III, L.P. | Delaware | |
| Century Contractors, LLC | North Carolina | |
| ColonialWebb Contractors Company | Virginia | |
| Comfort Systems USA (Arkansas), Inc. | Arkansas | |
| Comfort Systems USA (Central Texas), Inc. | Texas | |
| Comfort Systems USA (Intermountain), Inc. | Utah | |
| Comfort Systems USA (Kentucky), Inc. | Kentucky | |
| Comfort Systems USA (Mid South), Inc. | Alabama | |
| Comfort Systems USA (MidAtlantic), LLC | Virginia | |
| Comfort Systems USA (Northwest), Inc. | Washington | |
| Comfort Systems USA (Ohio), Inc. | Ohio | |
| Comfort Systems USA (South Central), Inc. | Texas | |
| Comfort Systems USA (Southeast), Inc. | Delaware | |
| Comfort Systems USA (Southwest), Inc. | Arizona | |
| Comfort Systems USA (Syracuse), Inc. | New York | |
| Comfort Systems USA (Texas), L.P. | Texas | |
| Comfort Systems USA G.P., Inc. | Delaware | |
| Comfort Systems USA Shoffner, Inc. | Tennessee | |
| Comfort Systems USA Strategic Accounts, LLC | Indiana | |
| ConServ Building Services of Alabama, LLC | Alabama | |
| ConServ Building Services of Georgia, LLC | Georgia | |
| ConServ Building Services of North Carolina, LLC | North Carolina | |
| ConServ Building Services of Tennessee, LLC | Tennessee | |
| ConServ Building Services, LLC | Florida | |
| Control Concepts Mechanical Services, LLC | Georgia | |
| Control Concepts, LLC | Georgia | |
| DECCO, Inc. | Massachusetts | |
| Dilling Group, Inc. | Indiana | |
| Dilling, LLC | Indiana | |
| Dyna Ten Corporation | Texas | |
| E Solutions LLC | Indiana | |
| Eastern Heating & Cooling, Inc. | New York | |
| Edwards Electrical & Mechanical, Inc. | Indiana | |
| Eldeco, Inc. | South Carolina | |
| Environmental Air Systems, LLC | North Carolina | |
| Envirotrol, LLC | North Carolina | |
| Feyen-Zylstra, LLC | Michigan | |
| Feyen-Zylstra Holdings, LLC | Michigan | |
| F. W. Dilling, LLC | Indiana | |
| Granite State Plumbing & Heating, LLC | New Hampshire | |
| Hayes & Lunsford Electric, LLC | South Carolina | |
| Hess Mechanical, LLC | Maryland | |
| HVACRedu.net LLC | Idaho | |
| Ivey Mechanical Company, LLC | Mississippi | |
| J & S Mechanical Contractors, Inc. | Utah | |
| Kodiak Labor Solutions, LLC | Delaware | |
| Meisner Electric, Inc. | Florida | |
| MEP Holding Co., Inc. | Indiana | |
| MJ Mechanical Services, Inc. | Virginia | |
| N471VY Trust | Utah | |
| North American Mechanical, Inc. | Delaware | |
| OFF, LLC | Indiana | |
| Post Oak Insurance Co. Ltd. | Cayman Islands | offshore centre |
| Precision Plumbing and Service, LLC | Delaware | |
| Premier Prefabrication Solutions, LLC | Texas | |
| Quality Air Heating & Cooling, Inc. | Michigan | |
| Riddleberger Brothers, Inc. | Virginia | |
| Right Way Plumbing & Mechanical LLC | Florida | |
| Royalaire Holdings, LLC | Florida | |
| Royalaire Mechanical Services, LLC | Florida | |
| S.I. Goldman Company, Inc. | Florida | |
| S.M. Lawrence Company, Inc. | Tennessee | |
| Seasonair, LLC | Maryland | |
| Smith Farm Properties, LLC | North Carolina | |
| Summit Industrial Construction, LLC | Delaware | |
| TAS Energy Inc. | Delaware | |
| TAS Modular Data Limited | Ireland | |
| Temp Right Service, Inc. | Delaware | |
| Tennessee Electric Company, Inc. | Tennessee | |
| TES Controls, LLC | Kentucky | |
| Thermal Service, LLC | Kentucky | |
| Trinity Contractors, LLC | Alabama | |
| Walker Electrical Contractors, LLC | Texas | |
| Walker Engineering, Inc. | Texas | |
| Walker Industrial, LLC | Texas | |
| Western States Mechanical, Inc. | Utah |
Two standard screens, computed from the XBRL in FY2025 against FY2024. Every test shows the numbers behind it — a score with its inputs hidden is a number you cannot check.
| Year | Revenue | Net income | Free cash flow | Gross margin | Shares |
|---|---|---|---|---|---|
| FY2020 | $2.9B | $150.1M | $262.4M | 19.1% | 36,738,000 |
| FY2021 | $3.1B | $143.3M | $157.8M | 18.3% | 36,450,000 |
| FY2022 | $4.1B | $245.9M | $253.2M | 17.9% | 36,046,000 |
| FY2023 | $5.2B | $323.4M | $544.7M | 19.0% | 35,895,000 |
| FY2024 | $7.0B | $522.4M | $738.0M | 21.0% | 35,775,000 |
| FY2025 | $9.1B | $1.0B | $1.0B | 24.1% | 35,413,000 |
2 institutions tracked — 0 added, 2 reduced.
| Manager | Kind | Shares | Change | Value |
|---|---|---|---|---|
| GEODE CAPITAL MANAGEMENT, LLC | Index | 1,151,350 | −87,269 | $2.3B |
| BAILLIE GIFFORD & CO | Value | 212,655 | −12,463 | $421.5M |
From 13F filings, which cover institutions managing over $100m and are filed up to 45 days after the quarter ends — so this is a considered position, not a live one, and it is not the whole shareholder register.
What the company actually paid out and bought back, as reported — the record behind any yield figure.
Ownership percentages are a vendor aggregate, not a filing — unlike everything else on this page.
COMFORT SYSTEMS USA INC files under SIC 1731 — all 3 electrical work companies compared on assets and F-score.
The structure map above is the Corporate Blueprint, and in the desktop it is interactive — click any entity to re-centre the map on it and walk the ownership chain. It sits alongside the screener, the scorecard and the filings lab on one desk, on your machine.
Sourced from SEC EDGAR primary filings. Figures are as reported by the company and are not investment advice. Scores are standard published screens computed from those filings; every input is shown above so you can check the arithmetic.
