| AgReliant Genetics | breeder, producer | 2000 | Corn |
| Ball Horticultural / PanAmerican Seed | breeder, distributor | 1905 | Tomato |
| BASF | Nunhems | breeder | - | Watermelon, Cucumber, Melon, Tomato |
| Bayer Crop Science | breeder, producer | - | Corn, Tomato, Watermelon, Cucumber |
| Beck's Hybrids | breeder, producer, distributor | 1937 | Corn, Wheat |
| Bejo Seeds | breeder | - | Cucumber |
| Campbell Soup Company (breeding, historical) | breeder | - | Tomato |
| Cornell Plant Breeding and Genetics | breeder, agency | - | Pepper, Tomato |
| Corteva Agriscience | breeder, producer | 2019 | Corn, Wheat |
| Enza Zaden | breeder | 1938 | Tomato, Cucumber |
| High Mowing Organic Seeds | breeder, retailer | 1996 | Tomato, Cucumber |
| Johnny's Selected Seeds | breeder, retailer | 1973 | Tomato, Cucumber, Melon |
| KWS | breeder | 1856 | Corn, Wheat |
| Limagrain / Vilmorin-Mikado & HM.CLAUSE | breeder, producer | - | Tomato, Melon |
| LSU AgCenter | research-institution, breeder | 1886 | Pepper |
| NC State Tomato Breeding Program | breeder, agency | - | Tomato |
| NMSU Chile Pepper Institute | breeder, agency | 1992 | Pepper |
| Petoseed (historical) | breeder | - | Tomato |
| Rijk Zwaan | breeder | 1924 | Tomato, Cucumber |
| Rutgers NJAES | breeder, agency | - | Tomato |
| Sakata Seed | breeder | 1913 | Tomato, Melon |
| Seminis Vegetable Seeds | breeder | - | Tomato, Watermelon, Cucumber, Melon |
| Syngenta Vegetable Seeds | breeder, producer | - | Tomato, Corn, Watermelon, Melon |
| Takii & Co. | breeder | 1835 | Tomato |
| Texas A&M AgriLife Research | research-institution, breeder | 1876 | Pepper |
| USDA Agricultural Research Service | agency, breeder | - | Tomato, Corn, Wheat |
| Victory Seed Company | retailer, breeder | - | Tomato |
| W. Atlee Burpee & Co. | breeder, retailer | 1876 | Tomato, Cucumber, Watermelon |
| Wyffels Hybrids | breeder, producer | 1946 | Corn |