| Glendora Grand INC | Health Care and Social Assistance | $2,866,108 | $2,897,517 | 381 | $119.6M |  Research |
| Nhra | Other Services (except Public Administration) | $2,388,000 | $2,421,039 | 222 | $42.4M | Research |
| P B S Engineers, Inc. | Professional, Scientific, and Technical Services | $1,999,500 | $1,922,989 | 86 | $10.6M | Research |
| Oasis Medical, Inc. | Manufacturing | $1,647,500 | $1,665,851 | 56 | $15.6M | Research |
| California Commercial Pools, Inc. | Construction | $1,609,000 | $1,624,076 | 90 | $102.5M | Research |
| P B S Engineers Inc. | Administrative and Support and Waste Management | $1,583,586 | $1,593,695 | 75 | $11.8M | Research |
| Building Electronic Controls, Inc. | Administrative and Support and Waste Management | $1,561,244 | $1,572,023 | 100 | $14.6M | Research |
| Foothill Church of Glendora | Other Services (except Public Administration) | $1,500,000 | $1,508,096 | 164 | N/A | Research |
| Building Electronic Controls Inc. | Administrative and Support and Waste Management | $1,479,396 | $1,489,286 | 100 | $14.6M | Research |
| Oasis Medical INC | Manufacturing | $1,444,945 | $1,459,354 | 87 | $24.3M | Research |
| Foothill Church of Glendora | Other Services (except Public Administration) | $1,375,000 | $1,397,490 | 176 | N/A | Research |
| Seidner-Miller, Inc. | Retail Trade | $1,333,000 | $1,254,004 | 106 | $26.7M | Research |
| B.r. Building Resources Company | Construction | $1,256,318 | $1,261,377 | 103 | $117.4M | Research |
| Kew Enterprises, INC | Professional, Scientific, and Technical Services | $1,222,800 | $1,442,600 | 64 | $6.6M | Research |
| Martin Automotive INC | Retail Trade | $1,180,540 | $1,196,255 | 60 | $15.1M | Research |
| Saint Paul Enterprises INC | Retail Trade | $1,049,600 | $1,057,422 | 79 | $13.8M | Research |
| B.r. & Sons Co | Construction | $1,000,000 | $1,025,775 | 135 | $153.8M | Research |
| Colley Auto Cars INC | Retail Trade | $1,000,000 | $927,456 | 71 | $17.9M | Research |
| Golden Bear Transportation & Marketing Co INC | Transportation and Warehousing | $998,000 | $835,305 | 39 | $9.9M | Research |
| Route 66 Post Acute LLC | Health Care and Social Assistance | $970,395 | $0 | 143 | $24.3M | Research |
| Wgj Enterprises, Inc. | Construction | $957,313 | $963,074 | 41 | $12.7M | Research |
| St Lucy's Priory High School | Educational Services | $844,202 | $852,343 | 68 | N/A | Research |
| Golden Bear Transportion & Marketing Co INC | Transportation and Warehousing | $759,802 | $763,528 | 33 | $8.8M | Research |
| Sb Distribution LLC | Transportation and Warehousing | $748,955 | $753,161 | 100 | $23.3M | Research |
| Chestnut Automotive of Glendora | Retail Trade | $696,564 | $683,515 | 49 | $12.3M | Research |