| Spectra -Blue Water Resort & Casino | Parker | 85344 |  | Apr 01, 2019 | WARN | 
| Specialty Textile | Phoenix | 85007 | 5 - ARIZONA@WORK - City of Phoenix | Mar 30, 2020 | WARN | 
| Specialized Bicycle Components, Inc. | Morgan Hill | 95037 | 7 - ARIZONA@WORK - Maricopa County | Jan 11, 2023 | WARN | 
| Southwest Key Programs, Inc. | Phoenix | 85007 | 7 - ARIZONA@WORK - Maricopa County | Sep 04, 2020 | WARN | 
| Southwest Key Programs Inc. | Youngtown AZ | 85363 | 7 - ARIZONA@WORK - Maricopa County | Oct 31, 2018 | WARN | 
| Southwest Key Programs Inc. | Phoenix | 85007 | 5 - ARIZONA@WORK - City of Phoenix | Oct 31, 2018 | WARN | 
| Southwest Key Programs | Phoenix | 85007 | 7 - ARIZONA@WORK - Maricopa County | Aug 06, 2025 | WARN | 
| Southwest Key Programs | Mesa | 85204 | 7 - ARIZONA@WORK - Maricopa County | Jul 31, 2025 | WARN | 
| Southwest Airlines |  |  | 5 - ARIZONA@WORK - City of Phoenix | Nov 06, 2020 | WARN | 
| Sound Physicians, Inc. | Tucson | 85711 | 6 - ARIZONA@WORK - Pima | Jul 30, 2024 | WARN | 
| SOSi International LLC | Reston | 20191 | 9 - ARIZONA@WORK - Yuma County | Mar 13, 2025 | Non-WARN | 
| SOSi | Tucson | 85710 | 8 - ARIZONA@WORK - Santa Cruz County | Mar 10, 2025 | Non-WARN | 
| SOLON Corporation |  |  | 6 - ARIZONA@WORK - Pima | Aug 15, 2011 | WARN | 
| Solari Crisis and Human Services | Tempe | 85288 | 7 - ARIZONA@WORK - Maricopa County | Jan 27, 2023 | Non-WARN | 
| Sodexo, Inc and Affiliates | Glendale | 85306 | 7 - ARIZONA@WORK - Maricopa County | Jul 02, 2025 | WARN | 
| Sodexo | Phoenix | 85034 | 5 - ARIZONA@WORK - City of Phoenix | Jan 18, 2019 | WARN | 
| Sodexo |  |  | 7 - ARIZONA@WORK - Maricopa County | Nov 06, 2020 | WARN | 
| Sodexo |  |  | 7 - ARIZONA@WORK - Maricopa County | Jul 30, 2014 | WARN | 
| Snapon Optics | Phoenix | 85017 | 5 - ARIZONA@WORK - City of Phoenix | Apr 14, 2020 | Non-WARN | 
| Sky High Crane & Rigging Inc | Lake Havasu City | 86404 | 11 - ARIZONA@WORK - Mohave and La Paz Counties | May 24, 2023 | Non-WARN | 
| Sion Power Corporation | Tucson | 85756 | 6 - ARIZONA@WORK - Pima | Mar 30, 2023 | Non-WARN | 
| Sheraton Phoenix Downtown | Phoenix | 85022 | 5 - ARIZONA@WORK - City of Phoenix | Jun 02, 2020 | WARN | 
| ShelterClean of Arizona, Inc. |  |  | 7 - ARIZONA@WORK - Maricopa County | Aug 15, 2011 | WARN | 
| Shaw Industries Group Inc. | Dalton | 30720 | 9 - ARIZONA@WORK - Yuma County | Sep 19, 2023 | WARN | 
| Shamrock Farms | Phoenix | 85009 | 5 - ARIZONA@WORK - City of Phoenix | Apr 02, 2020 | WARN |