| Oliver Packaging and Equipment Company | Manufacturing / Machinery manufacturing | MI | 245 | $1.2M to $4.3M | · | 57 | 10 | 86 | 2024-01-01 | 23 |
| Olympic Controls Corp. | Manufacturing / Electronics manufacturing | IL | 86 | $862,000 to $3.7M | · | 77 | 10 | 94 | 2024-01-01 | 31 |
| Omeat Inc. | Manufacturing / Food manufacturing | CA | 54 | $532,000 to $2.3M | · | 49 | 10 | 73 | 2024-01-01 | 18 |
| O•••• E••••••••• I••• | Manufacturing / Electronics manufacturing | CT | 636 | $11.2M to $48.1M | · | 23 | 0 | 83 | 2024-01-01 | 8 |
| O••• P••••••••• T••••••••• L•• | Manufacturing / Machinery manufacturing | TX | 50 | $640,000 to $2.3M | · | 63 | 10 | 56 | 2024-01-01 | 22 |
| O• S••••••••• C••••••••• | Manufacturing / Electronics manufacturing | AZ | 4,060 | $68.9M to $296M | · | 39 | 10 | 73 | 2024-01-01 | 14 |
| O••• E••••••• C•••••• | Manufacturing / Food manufacturing | WA | 59 | $588,000 to $2.5M | · | 54 | 10 | 73 | 2024-01-01 | 20 |
| O•••• L•••• I••• | Manufacturing / Food manufacturing | TX | 108 | $1.1M to $4.7M | · | 65 | 0 | 53 | 2024-01-01 | 19 |
| O•••••• C••• S•••••••• L•• | Manufacturing / Paper manufacturing | IL | 51 | $1.0M to $3.7M | · | 79 | 10 | 76 | 2024-01-01 | 30 |
| O••••• M•• H•••••••• L•• | Manufacturing / Fabricated metal products | MI | 2,173 | $18.6M to $65.5M | · | 49 | 10 | 40 | 2024-01-01 | 15 |
| O•• D••••••• I••• | Manufacturing / Nonmetallic mineral products | UT | 100 | $1.5M to $5.6M | · | 64 | 0 | 56 | 2024-01-01 | 19 |
| O••••• R•••• W•••••••• W••• C•••••• | Manufacturing / Beverage manufacturing | OR | 50 | $875,000 to $3.5M | · | 57 | 10 | 56 | 2024-01-01 | 19 |
| O••••••••• L•• | Manufacturing / Chemical manufacturing | FL | 53 | $840,000 to $3.4M | · | 64 | 10 | 56 | 2024-01-01 | 22 |
| O••••••• F•••••• C•••••••• C••• I••• | Manufacturing / Food manufacturing | NY | 57 | $672,000 to $2.9M | · | 71 | 10 | 73 | 2024-01-01 | 26 |
| O•••• L•••••• L•• | Manufacturing / Printing | WI | 56 | $455,000 to $1.6M | · | 60 | 10 | 76 | 2024-01-01 | 22 |
| O•••• O••••••••• I••• | Manufacturing / Miscellaneous manufacturing | CA | 100 | $3.1M to $13.0M | · | 57 | 10 | 37 | 2024-01-01 | 18 |
| O••••• H•••••• I••• | Manufacturing / Transportation equipment | CA | 117 | $1.2M to $5.3M | · | 68 | 10 | 73 | 2024-01-01 | 25 |
| O• S••••• I••••••••• I•• | Manufacturing / Apparel manufacturing | NC | 86 | $570,000 to $2.7M | · | 51 | 10 | 73 | 2024-01-01 | 19 |
| O••••••••• L•• | Manufacturing / Chemical manufacturing | AR | 50 | $1.3M to $5.3M | · | 63 | 10 | 56 | 2024-01-01 | 22 |
| O•••• R•••• I•• | Manufacturing / Apparel manufacturing | CA | 52 | $270,000 to $1.3M | · | 30 | 10 | 53 | 2024-01-01 | 10 |
| O••••••• I••••••••• I••• | Manufacturing / Plastics rubber products | NJ | 127 | $1.5M to $5.2M | Family owned | 89 | 15 | 96 | 2024-01-01 | 39 |
| O•••••• U••• I••• | Manufacturing / Furniture manufacturing | TN | 75 | $722,000 to $2.8M | · | 60 | 15 | 96 | 2024-01-01 | 27 |
| O•••••••• I•••••• L•• | Manufacturing / Miscellaneous manufacturing | OR | 62 | $640,000 to $2.7M | · | 56 | 10 | 94 | 2024-01-01 | 23 |
| O•••• B••••••• M•••••••• L•• | Manufacturing / Nonmetallic mineral products | MO | 53 | $900,000 to $3.4M | · | 60 | 10 | 56 | 2024-01-01 | 21 |
| P• • J• M••••••••• I••• | Manufacturing / Machinery manufacturing | WA | 94 | $656,000 to $2.4M | · | 71 | 17 | 76 | 2024-01-01 | 30 |
| P•• E••••••••• o• O••• L•• | Manufacturing / Printing | OH | 55 | $400,000 to $1.4M | · | 38 | 10 | 56 | 2024-01-01 | 13 |
| P•• I•••••• L•• | Manufacturing / Miscellaneous manufacturing | CA | 59 | $653,000 to $2.8M | · | 58 | 10 | 73 | 2024-01-01 | 22 |
| P•• I••••••••• | Manufacturing / Plastics rubber products | IL | 74 | $1.5M to $5.2M | · | 58 | 10 | 76 | 2024-01-01 | 22 |
| P•••••• C•••• I••••••••• | Manufacturing / Food manufacturing | CA | 52 | $574,000 to $2.5M | · | 52 | 10 | 37 | 2024-01-01 | 16 |
| P•••••• R••••••••• O•••••••• | Manufacturing / Machinery manufacturing | WA | 61 | $480,000 to $1.7M | · | 44 | 10 | 76 | 2024-01-01 | 16 |
| P••••••• T••••••••• I••• | Manufacturing / Machinery manufacturing | CA | 68 | $1.0M to $3.7M | · | 65 | 10 | 56 | 2024-01-01 | 22 |
| P••••••• U•• L•• | Manufacturing / Food manufacturing | CA | 54 | $728,000 to $3.1M | · | 54 | 10 | 73 | 2024-01-01 | 20 |
| P••••• U•• E••••••••• S•••••••• | Manufacturing / Fabricated metal products | OH | 92 | $299,000 to $1.1M | · | 23 | 10 | 86 | 2024-01-01 | 9 |
| P••••• R••••••• C••••••••• | Manufacturing / Wood products | MN | 52 | $718,000 to $2.7M | · | 67 | 10 | 76 | 2024-01-01 | 25 |
| P•••• W••••• a•• D•••• • O••••••••• | Manufacturing / Fabricated metal products | NV | 113 | $1.4M to $4.8M | · | 58 | 10 | 76 | 2024-01-01 | 22 |
| P•••• P••••••• C••••••• I••• | Manufacturing / Miscellaneous manufacturing | IL | 61 | $1.0M to $4.3M | · | 62 | 15 | 73 | 2024-01-01 | 25 |
| P••••••• P•••••••• • D•••••• | Manufacturing / Textile products | FL | 109 | $981,000 to $3.7M | · | 57 | 10 | 56 | 2024-01-01 | 20 |
| P••••••• V•••••••• I••• | Manufacturing / Fabricated metal products | AZ | 59 | $299,000 to $1.1M | · | 40 | 10 | 86 | 2024-01-01 | 16 |
| P•••••• C••••••••• | Manufacturing / Electrical equipment | CA | 479 | $7.6M to $29.0M | · | 54 | 10 | 76 | 2024-01-01 | 20 |
| P•••• C••••••••• o• N•• J••••• | Manufacturing / Wood products | NJ | 102 | $995,000 to $3.8M | · | 84 | 17 | 76 | 2024-01-01 | 35 |
| P••••• L••••••••• I••• | Manufacturing / Chemical manufacturing | NJ | 95 | $2.3M to $9.4M | · | 79 | 17 | 56 | 2024-01-01 | 30 |
| P••••• T••••• M•• I••••••••• | Manufacturing / Fabricated metal products | TN | 121 | $1.5M to $5.3M | · | 77 | 0 | 56 | 2024-01-01 | 22 |
| P••••• T••••••••• I••• | Manufacturing / Electronics manufacturing | TX | 60 | $933,000 to $4.0M | · | 57 | 10 | 83 | 2024-01-01 | 22 |
| P•••• C••• H••••••• I•• | Manufacturing / Printing | NJ | 4,797 | $35.0M to $124M | · | 47 | 10 | 40 | 2024-01-01 | 15 |
| P••••••••• S••••••• I••• | Manufacturing / Machinery manufacturing | MO | 59 | $576,000 to $2.1M | · | 66 | 10 | 56 | 2024-01-01 | 23 |
| P••• R••••• C••••• I••• | Manufacturing / Furniture manufacturing | NC | 51 | $286,000 to $1.1M | · | 43 | 10 | 56 | 2024-01-01 | 15 |
| P•••• P••••••• C•••••• | Manufacturing / Fabricated metal products | MO | 95 | $218,000 to $768,000 | · | 45 | 10 | 76 | 2024-01-01 | 17 |
| P•• M••••• I••• | Manufacturing / Fabricated metal products | PA | 131 | $1.6M to $5.6M | · | 50 | 0 | 96 | 2024-01-01 | 0 |
| P•••• V••••••• I••••••••• I••• | Manufacturing / Primary metal | CA | 55 | $987,000 to $3.6M | · | 70 | 10 | 76 | 2024-01-01 | 26 |
| P•••••• I••••••••• I••• | Manufacturing / Miscellaneous manufacturing | GA | 118 | $1.5M to $6.4M | · | 57 | 10 | 73 | 2024-01-01 | 21 |