Exhibit 21
nVent Electric plc subsidiaries as of December 31, 2025

Name of Company |  | Jurisdiction of Incorporation
1642 Burlington Lease LLC |  | United States
Alberta Electronic Company Limited |  | Hong Kong
Asia Pacific CIS (Thailand) Co., Ltd. |  | Thailand
Asia Pacific CIS (Wuxi) Co., Ltd. |  | China
Atkinson Industries LLC |  | United States
Bergen Industries, LLC |  | United States
BESM Holdings, LLC |  | United States
Central Electric Company LLC |  | United States
Central Electric Manufacturing Company LLC |  | United States
CGIT Systems LLC |  | United States
CIS Global LLC |  | United States
CIS Holding Corp. |  | United States
CISWW Engineering India Private Limited |  | India
Critical Power Equipment & Solutions, Inc. |  | United States
ECM (Shanghai) Trading Co., Ltd. |  | China
ECM Holdings Inc. |  | United States
ECM Industries, LLC |  | United States
ECM Investors, LLC |  | United States
ECMI Holdings, LLC |  | United States
Eldon AB |  | Sweden
Eldon AS |  | Norway
Eldon Austria GmbH |  | Austria
Eldon Electric Limited |  | United Kingdom
Eldon Espana, S.A.U. |  | Spain
Eldon GmbH |  | Germany
Eldon Holding AB |  | Sweden
Eldon NV |  | Netherlands
Eldon SRL |  | Romania
Electrical Power Systems LLC |  | United States
Electronic Enclosures, LLC |  | United States
Enclosures Inc. |  | United States
ERICO Canada Inc. |  | Canada
ERICO do Brasil Ltda. |  | Brazil
ERICO Europe B.V. |  | Netherlands
ERICO France Sarl |  | France
ERICO GLOBAL COMPANY |  | United States
ERICO International Corporation |  | United States
ERICO Italia S.r.l. |  | Italy
ERICO Limited |  | Hong Kong
ERICO Ltd. |  | China
ERICO Mexico, S.A. de C.V. |  | Mexico
ERICO Poland SP. Z.o.o. |  | Poland
ERICO Products Australia Pty. Ltd |  | Australia
Everest Blocker Holding, Inc. |  | United States
FTZ Holdco LLC |  | United States
GCP CIS Blocker Inc. |  | United States
GCP CIS Holdings, LLC |  | United States
Hoffman Enclosures (Mex.), LLC |  | United States
Hoffman Enclosures Mexico, S. de R.L. de C.V. |  | Mexico
Hoffman Enclosures Inc. |  | United States

Hoffman Schroff Asia Pte Ltd |  | Singapore
Hoffman Schroff de Mexico S.a.r.l. |  | Mexico
Hoffman Schroff GmbH |  | Switzerland
Hoffman Schroff Holdings, Inc. |  | United States
Hoffman Schroff Manufacturing S. de R.L. de C.V. |  | Mexico
Hoffman Schroff Poland Sp.z.o.o. |  | Poland
Hoffman Schroff PTE Ltd |  | Singapore
Hoffman Schroff Sales S. de R.L. de C.V. |  | Mexico
Iceotope Group Limited* |  | Canada
Ilsco Canada Newco ULC |  | Canada
ILSCO de Mexico, S. de R.L. de C.V. |  | Mexico
ILSCO Extrusions, LLC |  | United States
ILSCO International, LLC |  | United States
ILSCO, LLC |  | United States
King Technology of Missouri, LLC |  | United States
Limited Liability Company nVent Rus |  | Russian Federation
Lionel Acquisition Co. |  | United States
nVent Armaturen Holding GmbH |  | Germany
nVent Belgium B.V. |  | Belgium
nVent Bus LLC |  | United States
nVent do Brasil Ltda. |  | Brazil
nVent E&S Operating LLC |  | United States
nVent EBS Holding LLC |  | United States
nVent EFS Investments 1, LLC |  | United States
nVent EFS Investments 2, LLC |  | United States
nVent EFS Investments LP |  | United States
nVent Electrical Products (Shanghai) Co., Ltd. |  | China
nVent Electrical Products China Co., Ltd. |  | China
nVent Electrical Products India Private Limited |  | India
nVent Enclosure Systems LLC |  | United States
nVent Enclosures & Switchgear LLC |  | United States
nVent Enclosures India Private Limited |  | India
nVent Enclosures Italia Srl |  | Italy
nVent Enclosures Systems - Chattanooga LLC |  | United States
nVent Finance Group GmbH |  | Switzerland
nVent Finance S.a.r.l. |  | Luxembourg
nVent Global S.a.r.l. |  | Luxembourg
nVent Holding NL B.V. |  | Netherlands
nVent Holdings S.A. |  | France
nVent Holdings, Inc. |  | United States
nVent International (UK) Ltd. |  | United Kingdom
nVent International Holding S.a.r.l. |  | Luxembourg
nVent International Holdings, Inc. |  | United States
nVent Japan Co., Ltd. |  | Japan
nVent Low Voltage LLC |  | United States
nVent Luxembourg S.a.r.l. |  | Luxembourg
nVent Management Company |  | United States
nVent Middle East FZE |  | United Arab Emirates
nVent Power & Data Infrastructure India Private Limited |  | India
nVent Services Canada Limited |  | Canada
nVent Services GmbH |  | Switzerland
nVent Services Holding GmbH |  | Switzerland
nVent Summit Holdings LLC |  | United States
nVent Teknoloji Sistemleri Ticaret Limited Sirketi |  | Turkey
nVent UK Holdings Limited |  | United Kingdom

Parkline Field Services LLC |  | United States
Parkline Parent Company, Inc. |  | United States
Parkline, Inc. |  | United States
Powergrid Solutions LLC |  | United States
Schroff Co. Ltd. Taiwan |  | Taiwan
Schroff GmbH |  | Germany
Schroff Holdings Germany GmbH |  | Germany
Schroff SAS |  | France
Schroff, Inc. |  | United States
Steinhauer GmbH |  | Germany
Surge Suppression, LLC |  | United States
Texa Industries S.r.l. |  | Italy
The Calvert Company LLC |  | United States
The Patent Store, LLC |  | United States
Tonka Bay Insurance Company |  | United States
Torgoterm AD* |  | Bulgaria
Trachte Acquisition Sub, LLC |  | United States
Trachte Associates Southeast LLC |  | United States
Trachte Associates, L.L.P. |  | United States
Trachte Southeast LLC |  | United States
Trachte, LLC |  | United States
Warrior Acquisition Parent, Inc. |  | United States
Warrior Acquisition, Inc. |  | United States
Warrior Intermediate Parent, LLC |  | United States
Warrior Power Structures, Inc. |  | United States
WCPS Holdings Inc. |  | United States
Yabaida Electronics (Shenzhen) Company Limited |  | China

All entities are 100% owned subsidiaries, unless otherwise indicated.
* Iceotope is 5.2% owned. Torgoterm AD is 19% owned.