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Top Energy Companies on the Inc. 5000
| RANK | COMPANY | 3 YEAR % GROWTH | REVENUE (millions) | STATE |
| 15 | Greenspring Energy | 8730% | $10.5 million | MD |
| 24 | re2g | 7493% | $10.6 million | PA |
| 38 | SunDurance Energy | 5126% | $45.3 million | NJ |
| 42 | OnForce Solar | 4493% | $9.2 million | NY |
| 46 | FLS Energy | 4303% | $17.6 million | NC |
| 79 | K2 Energy Solutions | 2984% | $5.5 million | NV |
| 100 | Check-6 | 2661% | $14.8 million | OK |
| 181 | Standard Solar | 1686% | $23 million | MD |
| 196 | Clean Currents | 1548% | $2.4 million | MD |
| 286 | Realgy | 1147% | $14.9 million | CT |
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