| Company | State | Location | Workers | Notice date |
| Ascent Classical Academy of Douglas County | CO | Arapahoe/Douglas | 149 | 2023-12-28 |
| HMSHost | IL | Chicago, O'Hare Airport, 10000 W. Balmoral Ave. | 127 | 2023-12-29 |
| REXAM Beverage Can Company (Ball Corp) | WA | Kent | 121 | 2023-12-28 |
| Sleep Number | UT | Salt Lake City | 92 | 2023-12-29 |
| Ascent Classical Academy of Northern Colorado | CO | Larimer | 87 | 2023-12-28 |
| Boeing | CA | Los Angeles County | 68 | 2023-12-27 |
| eReplacement Parts | UT | Salt Lake City | 65 | 2023-12-29 |
| Western Digital | CA | Santa Clara County | 60 | 2023-12-27 |
| Pennymac | CA | Los Angeles County | 51 | 2023-12-29 |
| Blue Shield of California | CA | Alameda County | 49 | 2023-12-29 |
| Pac-12 Conference | CA | Contra Costa County | 46 | 2023-12-27 |
| Ascent Classical Academy of Grand Junction | CO | Mesa | 37 | 2023-12-28 |
| Ascent Classical Academy of Norther Denver | CO | Adams | 33 | 2023-12-28 |
| Blue Shield of California | CA | El Dorado County | 31 | 2023-12-29 |
| Sunrun | CA | Contra Costa County | 26 | 2023-12-27 |