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| List of Subsidiaries - Acuity Inc. | | | Exhibit 21 |
| | | |
| | | State or Other Jurisdiction of | |
| Subsidiary or Affiliate | | | Incorporation or Organization | | |
| A to Z Manufacturing LLC | | | Arizona | |
| AB Netherlands Holdings B.V. | | | Netherlands | |
| ABL IP Holding LLC | | | Georgia | |
| Acuity Aviation LLC | | | Georgia | |
| Acuity Brands Insurance (Bermuda) Ltd. | | | Bermuda | |
| Acuity Brands Lighting, Inc. | | | Delaware | |
| Acuity Brands Lighting Canada, Inc. | | | Canada | |
| Acuity Brands Lighting (Hong Kong) Limited | | | Hong Kong | |
| Acuity Brands Lighting de Mexico, S. de R.L. de C.V. | | | Mexico | |
| Acuity Brands Mexico Holdings II LLC | | | Delaware | |
| Acuity Brands Netherlands B.V. | | | Netherlands | |
| Acuity Brands Services, Inc. | | | Delaware | |
| Acuity Intelligent Spaces Inc. | | | Delaware | |
| Acuity Digital Ireland Limited | | | Dublin, Ireland | |
| Acuity Intelligent Spaces UK Limited | | | United Kingdom | |
| Acuity Intelligent Spaces US Inc. | | | Missouri | |
| Acuity Mexico Holdings, LLC | | | Delaware | |
| Acuity Trading (Shanghai) Co. Ltd. | | | People's Republic of China | |
| Amerillum, LLC | | | California | |
| Arizona (Tianjin) Electronics Products Trade Co., Ltd | | | People's Republic of China | |
| Arizona Trading Company Limited | | | Hong Kong | |
| Castlight de Mexico, S.A. de C.V. | | | Mexico | |
| Distech Controls Inc. | | | British Columbia, Canada | |
| Distech Controls Energy Services (Canada) Inc. | | | Quebec, Canada | |
| Distech Controls Energy Services, Inc. | | | Texas | |
| Distech Controls Facility Solutions Inc. | | | Ontario, Canada | |
| Distech Controls SAS | | | France | |
| eldoLAB Holding B.V. | | | Netherlands | |
| eldoLED B.V. | | | Netherlands | |
| EXY Poland sp. z o.o. | | | Poland | |
| Holophane S.A. de C.V. | | | Mexico | |
| Holophane Europe Ltd. | | | United Kingdom | |
| Holophane Lighting Ltd. | | | United Kingdom | |
| HSA Acquisition Company, LLC | | | Ohio | |
| ID Limited | | | Isle of Man | |
| KE2 Connect, LLC | | | Missouri | |
| Luminaire LED, LLC | | | Delaware | |
| Luxfab Ltd | | | United Kingdom | |
| QSC, LLC | | | California | |
| QSC APAC Private Limited | | | Singapore | |
| QSC Asia, Limited | | | Hong Kong | |
| QSC Capital, LLC | | | California | |
| QSC EMEA GmbH | | | Germany | |
| QSC India Private Limited | | | India | |
| QSC MEA DMCC | | | United Arab Emirates | |
| QSC Netherlands B.V. | | | Netherlands | |
| QSC UK & Ireland Limited | | | United Kingdom | |
| Q SYS Middle East Electronics Trading L.L.C. | | | United Arab Emirates | |
| Rockpile Ventures, Inc. | | | Delaware | |
| Seervision GmbH | | | Switzerland | |
| Seervision Hellas Mon IKE | | | Greece | |
| The Luminaires Group U.S.A., LLC | | | Delaware | |