| #1 Door Stop INC | Freitas Susana De | — | (209) 647 2853 | Other | Manteca · San Joaquin County | — | — |
| 1st Class Blinds And Shutters | 1st Class Blinds And Shutters | — | (209) 838 8278 | Other | Escalon · San Joaquin County | — | — |
| 1st Class Plumbing And Drains LLC | Carlos L Del Toro | — | (510) 220 8523 | Other | Tracy · San Joaquin County | — | — |
| 209 Lath & Plastering | 209 Lath & Plastering | — | (209) 401 3849 | Other | Stockton · San Joaquin County | — | — |
| 209 Plumbing | 209 Plumbing | — | (209) 687 4367 | Other | Ripon · San Joaquin County | — | — |
| 4 J Sectional Doors | 4 J Sectional Doors | — | (925) 383 8428 | Other | Ripon · San Joaquin County | — | — |
| 4G Concrete Specialties INC | Kristin Julia Paulazzo | — | (925) 667 7257 | Other | French Camp · San Joaquin County | — | — |
| A & M Tile Company | Raymond Lee Jr Ausban | — | (209) 481 5929 | Other | Stockton · San Joaquin County | — | — |
| A & S Concrete | A & S Concrete | — | (209) 652 0955 | Other | Stockton · San Joaquin County | — | — |
| A - Dependable Overhead Door Co | Christopher Michael Green | — | (209) 484 8977 | Other | Ripon · San Joaquin County | — | — |
| A B E Lath & Plastering INC | Diaz Raul Candelas | — | (209) 321 1436 | Other | Manteca · San Joaquin County | — | — |
| A E I Plumbing | A E I Plumbing | — | (209) 471 8281 | Other | Stockton · San Joaquin County | — | — |
| A F I Construction | Antonio Franco Inocencio | — | (209) 835 9702 | Other | Tracy · San Joaquin County | — | — |
| A G 7 Tile Natural Stone INC | Jose De Jesus Aguirre | — | (650) 722 0444 | Other | Tracy · San Joaquin County | — | — |
| A H Fencing | A H Fencing | — | (209) 430 9787 | Other | Victor · San Joaquin County | — | — |
| A I S INC | Michael Patrick Lavelle | — | (925) 455 1800 | Other | Tracy · San Joaquin County | — | — |
| A M Backhoe | A M Backhoe | — | (209) 597 5363 | Other | Tracy · San Joaquin County | — | — |
| A M Stephens Concrete INC | Gina Sherene Ostlund | — | (209) 333 0136 | Other | Lodi · San Joaquin County | — | — |
| A M Stephens Construction Co INC | Jennifer Lynn Cairns | — | (209) 333 0136 | Other | Lodi · San Joaquin County | — | — |
| A One Hoe Rental | Dennis Jay Letteer | — | (510) 760 2695 | Other | Manteca · San Joaquin County | — | — |
| A Romero Fence | A Romero Fence | — | (209) 610 3206 | Other | Stockton · San Joaquin County | — | — |
| A Touch Of Stone And Tile | Shad Shokralla | — | (650) 787 6255 | Other | Manteca · San Joaquin County | — | — |
| A W Manufacturing Specialist INC | Michael Eugene Petrunt | — | (209) 931 6805 | Other | Stockton · San Joaquin County | — | — |
| A West Concrete Specialist | A West Concrete Specialist | — | (510) 385 3064 | Other | Tracy · San Joaquin County | — | — |
| A-1 Plumbing Company | Barragan Francisco Chavez | — | (209) 430 2730 | Other | Stockton · San Joaquin County | — | — |
| A1 Backflow Service INC | Cary James White | — | (209) 607 7383 | Other | Manteca · San Joaquin County | — | — |
| Aa Plumbing | Aa Plumbing | — | (510) 723 4561 | Other | Tracy · San Joaquin County | — | — |
| Aa Sign Image INC | Domingo Valenzuela Gamez | — | (209) 983 5023 | Other | Stockton · San Joaquin County | — | — |
| Aa Sign Image Services | Domingo Valenzuela Gamez | — | (209) 983 5023 | Other | Stockton · San Joaquin County | — | — |
| Aaa Backflow Prevention INC | Jordan Cameron Lee | — | (877) 226 3569 | Other | Stockton · San Joaquin County | — | — |
| Aaa Locksmith | Daniel Wayne Batty | — | (209) 599 1975 | Other | Ripon · San Joaquin County | — | — |
| Aaa Septic And Rooter | Aaa Septic And Rooter | — | (209) 351 5969 | Other | French Camp · San Joaquin County | — | — |
| Aaa Septic INC | Cameron Michael Fontana | — | (209) 983 5009 | Other | French Camp · San Joaquin County | — | — |
| Aaa Sweeping Solutions INC | Julio Cesar Fernandez Jimenez | — | (408) 417 9563 | Other | Manteca · San Joaquin County | — | — |
| Absolute Plumbing Of San Joaquin County | Howard Wayne Woolems | — | (209) 369 0584 | Other | Stockton · San Joaquin County | — | — |
| Ac/dc Ornamental Iron Works | Ac/dc Ornamental Iron Works | — | (209) 914 4179 | Other | Tracy · San Joaquin County | — | — |
| Accent Carpets | Aldo Anthony Brocchini | — | (209) 835 9763 | Other | Tracy · San Joaquin County | — | — |
| Accomplish Water Heater Service | Peni Langoia Bourke | — | (925) 705 5554 | Other | Tracy · San Joaquin County | — | — |
| Accurate Storage Systems | Bryan Keith Chavis | — | (209) 562 9243 | Other | Lodi · San Joaquin County | — | — |
| Acevedo Lath & Plastering INC | Acevedo Galvan Luis | — | (209) 298 7974 | Other | Stockton · San Joaquin County | — | — |