| PGR | Progressive |
| ALL | Allstate |
| TRV | Travelers Companies |
| CINF | Cincinnati Financial |
| RLI | RLI |
| STC | Stewart Information Services |
| HMN | Horace Mann Educators |
| GBLI | Global Indemnity Group |
| CNA | CNA Financial |
| CB | Chubb |
| SIGI | Selective Insurance Group |
| DGICA | Donegal Group |
| KMPR | Kemper |
| WRB | W. R. Berkley |