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Exhibit 21.1
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Resideo Technologies, Inc. |
Subsidiaries of the Registrant as of December 31, 2025 |
Subsidiary Name | | Country of Incorporation |
Ademco 1 B.V. | | Netherlands |
Ademco 1 GmbH | | Germany |
ADEMCO 1 LIMITED | | United Kingdom |
Ademco 2 GmbH | | Germany |
ADEMCO 2 LIMITED | | United Kingdom |
ADEMCO 4 LIMITED | | United Kingdom |
Ademco Adi Global Distribution, S.L. | | Spain |
Ademco Australia Pty Limited | | Australia |
Ademco Comercial y Centro de Investigación y Desarrollo, S. de R.L. de C.V. | | Mexico |
Ademco CZ s.r.o. | | Czechia (Czech Republic) |
ADEMCO FZE | | United Arab Emirates |
Ademco I LLC | | United States |
ADEMCO III Ltd. | | Canada |
Ademco Manufacturing Holding Mexico, S. de R.L. de C.V. | | Mexico |
Ademco Otomasyon Limited Şirketi | | Turkey |
ADEMCO SRL | | Argentina |
Ademco Supply S.r.l. | | Romania |
ADI Global Distribution AB | | Sweden |
ADI Global Distribution Denmark A/S | | Denmark |
ADI Global Distribution Inc. |
| United States |
ADI Global Germany GmbH | | Germany |
ADI of Puerto Rico, Inc. | | Puerto Rico |
ADI-Gardiner SAS | | France |
ADI-Gardiner EMEA SAS | | France |
ADI-Gardiner Ireland Limited | | Ireland |
ADI-Gardiner Limited | | United Kingdom |
ADI-GARDINER Netherlands B.V. | | Netherlands |
ADI-Gardiner NV | | Belgium |
AlarmNet, Inc. | | United States |
BRK Brands LLC |
| United States |
Control4 India Private Limited |
| India |
Control4 Switzerland AG | | Switzerland |
Electronica BRK de Mexico S.A. de C.V. | | Mexico |
Mexhon, S. de R.L. de C.V. | | Mexico |
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Pittway BV | | Belgium |
Pittway Sarl | | Switzerland |
Radio Systemes Ingénierie Video Technologies SAS | | France |
Resideo Funding Inc. | | United States |
Resideo Holding Inc. | | United States |
Resideo Intermediate Holding Inc. | | United States |
Resideo International (India) Private Limited | | India |
Resideo Korea Co., Ltd. | | South Korea |
Resideo Korlátolt Felelősségű Társaság (Resideo Kft.) | | Hungary |
Resideo LLC | | United States |
Resideo Overseas Limited | | United Kingdom |
Resideo Overseas, LLC |
| United States |
Resideo Plumbing Limited | | United Kingdom |
Resideo S.r.l. | | Italy |
Resideo s.r.o. | | Slovakia |
Resideo Sarl | | France |
Resideo Singapore Pte. Ltd. | | Singapore |
Resideo Smart Home Technologies (India) Private Limited | | India |
Resideo Smart Homes Technology (Tianjin) Co., Ltd | | China |
Resideo Technologies, Inc. |
| United States |
Resideo USA LLC |
| United States |
RSI Participations SAS |
| France |
Satamatics Global Limited |
| United Kingdom |
Satcom1 Integration Services ApS | | Denmark |
Securite Communications SAS | | France |
SFTY AS | | Norway |
SNAP ONE APAC PTY LTD | | Australia |
SNAP ONE AUSTRALIA HOLDINGS PTY LTD | | Australia |
SNAP ONE AUSTRALIA PTY LTD | | Australia |
Snap One doo Beograd | | Serbia |
Snap One EMEA LTD | | United Kingdom |
Snap One Holdings Corp. | | United States |
Snap One, LLC | | United States |
Snap One, LLC (Taiwan Branch) | | China |
Staub Electronics Ltd | | Canada |
SunBrite Holding Corp | | United States |
SUNBRITETV LLC | | United States |
Teknique Limited | | New Zealand |
Ultrak Security Systems Sp.z o.o. | | Poland |
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From: Foster, Joshua
To: Hawk, Rand; Barner, Brian; Rode, Tyler; Killham, Carol
Cc: Sele, Brittany
Subject: Re: 2025 10K Listings Exhibit
Date: Monday, February 23, 2026 5:56:10 PM
No.
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From: Hawk, Rand
Sent: Monday, February 23, 2026 4:53:32 PM
To: Barner, Brian; Rode, Tyler; Killham, Carol; Foster, Joshua
Cc: Sele, Brittany
Subject: RE: 2025 10K Listings Exhibit
Thanks, Brian – we'll push that through. @Foster, Joshua anything else from your end? Thanks,
Rand Hawk
Senior Manager
SEC Reporting | Technical Accounting
Resideo
16100 N 71st St
Scottsdale, AZ 85245
M 480.74
0.6124
This email and any accompanying attachments are intended for the addressee(s) only and may be confidential. If received in error, please keep contents confidential, notify the sender, and delete this email (and any copies and attachments).
From: Barner, Brian
Sent: Monday, February 23, 2026 2:42 PM
To: Rode, Tyler; Hawk, Rand; Killham, Carol
Cc: Foster, Joshua; Sele, Brittany
Subject: RE: 2025 10K Listings Exhibit
ADI-Gardiner should have "SAS" at the end of the name. The rest looks fine.
Brian Elliott Barner, BA, JD, LLM, EMBA
Tax Planning Leader
Resideo Technologies Inc.
(+1) 202-500-2802
1985 Douglas Drive N Golden Valley, MN 55422
From: Rode, Tyler
Sent: Friday, February 20, 2026 5:56 PM
To: Hawk, Rand; Barner, Brian; Killham, Carol
Cc: Foster, Joshua; Sele, Brittany
Subject: RE: 2025 10K Listings Exhibit
Hello, good evening.
Attached updated exhibit listing.
Please note this does not include Control4 Smart Control Technology Shanghai Co Ltd – China given it was liquidated in 2025.
Can you review and confirm approval? Thanks,
Tyler
From: Hawk, Rand
Sent: Friday, February 20, 2026 5:58 PM
To: Barner, Brian; Killham, Carol; Rode, Tyler
Cc: Foster, Joshua; Sele, Brittany
Subject: RE: 2025 10K Listings Exhibit
Thanks, Brian.
@Rode, Tyler can you please make those updates and send the draft back to Brian and
Josh for final review?
Thanks,
Rand Hawk
Senior Manager
SEC Reporting | Technical Accounting
Resideo
16100 N 71st St
Scottsdale, AZ 85245
M 480.74
0.6124
This email and any accompanying attachments are intended for the addressee(s) only and may be confidential. If received in error, please keep contents confidential, notify the sender, and delete this email (and any copies and attachments).
From: Barner, Brian
Sent: Friday, February 20, 2026 3:29 PM
To: Killham, Carol; Hawk, Rand
Cc: Rode, Tyler; Foster, Joshua; Sele, Brittany
Subject: RE: 2025 10K Listings Exhibit
Rand,
See comments below in red text.
Brian Elliott Barner, BA, JD, LLM, EMBA
Tax Planning Leader
Resideo Technologies Inc.
1985 Douglas Drive N Golden Valley, MN 55422 Brian.Barner@resideo.com
From: Killham, Carol
Sent: Friday, February 20, 2026 9:38 AM
To: Barner, Brian
Cc: Rode, Tyler; Hawk, Rand; Foster, Joshua; Sele, Brittany
Subject: RE: 2025 10K Listings Exhibit
Hi Brian
As requested I have compared the two documents and the differences are:-
Companies not appearing on the Dec 31 2025 Org Chart:-
ADI Gardiner Holding Ltd – UK Dissolved 14 November 2025. This company did not exist at year end and should be removed from the list.
LLC Resideo – Russia Will be liquidated in March 2026. This company was liquidated on December 12, 2025, and should be removed from the list.
Resideo Manufacturas de Chihuahua, S. de R.L. de C.V. – Mexico. This company was sold in 2024 and should be removed from the list.
Companies on Org Chart not appearing on the list:-
Control4 Smart Control Technology Shanghai Co Ltd – China. Let's add Control4 Smart Control Technology Shanghai Co Ltd to the list please. It was liquidated on the last day of 2025.
Hope this helps Carol
Carol Killham
Legal Project Management Specialist (EMEA/APAC)
Resideo
3 Waterside Drive Arlington Business Park Theale
Reading RG7 4SW
From: Barner, Brian
Sent: Thursday, February 19, 2026 1:26 PM
To: Hawk, Rand; Sele, Brittany; Foster, Joshua; Killham, Carol
Cc: Rode, Tyler
Subject: RE: 2025 10K Listings Exhibit
Carol,
Do you mind comparing the attached listing of entities with the attached 2025 year-end org chart and let us know any differences?
Brian Elliott Barner, BA, JD, LLM, EMBA
Tax Planning Leader
Resideo Technologies Inc.
1985 Douglas Drive N Golden Valley, MN 55422
From: Hawk, Rand
Sent: Wednesday, February 18, 2026 10:01 PM
To: Sele, Brittany; Foster, Joshua; Barner, Brian
Cc: Rode, Tyler
Subject: RE: 2025 10K Listings Exhibit
Thanks, Brittany!
@Barner, Brian can you please take a look and let us know if you are in agreement?
Thanks,
Rand Hawk
Senior Manager
SEC Reporting | Technical Accounting
Resideo
16100 N 71st St
Scottsdale, AZ 85245
M 480.74
0.6124
This email and any accompanying attachments are intended for the addressee(s) only and may be confidential. If received in error, please keep contents confidential, notify the sender, and delete this email (and any copies and attachments).
From: Sele, Brittany
Sent: Wednesday, February 18, 2026 2:23 PM
To: Foster, Joshua; Hawk, Rand
Subject: 2025 10K Listings Exhibit
Hi Josh and Rand,
Please see attached for Rezi entities as of 12-31-25. Thanks,
Brittany