| 2006 Rank | 2005 Rank | Name of Operation | Headquarters | # Sows 2006 | # Sows 2005 | Comments |
| 1 | 1 | Smithfield Foods | Smithfield, VA | 1,200,115 | 960,000 | 995,325 in U.S., rest international. Bought Premium Standard Farms in Sept. |
| 2 | NA | Seaboard Foods | Shawnee Mission, KS | 213,600 | 213,600 | Includes Christensen, Hanor, TriOak, New Fashion, Eichelberger, Allied Producers’. |
| 3 | 3 | Seaboard Farms | Shawnee Mission, KS | 213,600 | 213,600 | No plans for more sows. Marketing pork for Triumph Foods. |
| 4 | 4 | Iowa Select Farms | Iowa Falls, IA | 150,000 | 150,000 | Building finishing barns. No plans for sow growth. |
| 5 | 6 | Prestage Farms | Clinton, NC | 140,000 | 140,000 | Building finishing barns in Iowa. Shipping weaned pigs from MS to IA. |
| 6 | 8 | The Pipestone System | Pipestone, MN | 130,000 | 110,000 | Most growth comes from existing sites that Pipestone is now managing. |
| 7 | 13 | The Maschhoffs | Carlyle, IL | 116,000 | 115,000 | Added one 6,000-sow farm, but removed some old Land O’Lakes farms. |
| 8 | 9 | Cargill | Minneapolis, MN | 87,000 | 94,000 | Sow reduction due to natural attrition. |
| 9 | 10 | Maxwell Foods, Inc. | Goldsboro, NC | 76,000 | 76,000 | Plan to build three 5,000-sow farms in Indiana by late 2007..Òr |
| 10 | 13 | AMVC Management | Audubon, IA. | 75,000 | 65,000 | Includes Natural Pork Production II. Acquired a sow farm in Indiana. |
| 11 | 12 | Tyson Foods | Springdale, AR | 70,000 | 70,000 | No changes |
| 12 | 15 | Progressive Swine Tech. | Columbus, NE | 55,200 | 50,000 | Built a 5,200-sow farm. Also adding finishing.r |
| 13 | 14 | Hormel Foods | Austin, MN | 51,000 | 51,000 | Adding 10,000 sows in Wyoming. |
| 14 | 16 | Nebraska Pork Partners | Columbus, NE | 45,000 | 45,000 | No plans for expansion, but looking for opportunities. |
| 15 | 18 | Wakefield Pork | Gaylord, MN | 41,000 | 38,600 | Added one 2,400-sow farm. |
| 16 | 17 | Hatfield Quality Meats | Hatfield, PA | 36,100 | 41,100 | Exited some farms. Sow expansion planned for PA and IN in 2007. |
| 17 | 20 | Whitestone Farms | Burnsville, MN | 35,000 | 35,000 | No expansion planned.h. |
| 18 | 22 | Texas Farm | Perryton, TX | 33,500 | 29,000 | Not expanding at this time. |
| 19 | 21 | Holden Farms | Northfield, MN | 32,000 | 30,000 | Added 2,000 sows |
| 20 | 22 | Coharie Farms | Clinton, NC | 31,000 | 29,000 | All growth is internal. |
| TOTALS | 3,017,315 | 2,693,650 | Growth of 323,665 sows. | |||
| Source: Successful Farming | ||||||