| RANK | COMPANY NAME | 3-YEAR % GROWTH | REVENUE (millions) | INDUSTRY | EMPLOYEES | CITY | STATE |
|---|---|---|---|---|---|---|---|
| 143 | Zumasys | 1,234% | $11.7 million | ■ IT Services | 26 | Irvine | CA |
| 4295 | ZTS Construction | 39% | $2.7 million | ■ Construction | 2 | Windsor | CO |
| 836 | Zorbit Resources | 354% | $45 million | ■ Manufacturing | 95 | New York | NY |
| 877 | Zobmondo!! Entertainment | 344% | $5.9 million | ■ Consumer Products & Services | 1 | Los Angeles | CA |
| 1488 | ZirMed | 216% | $34 million | ■ Health | 204 | Louisville | KY |
| 375 | Zipcar | 675% | $105.9 million | ■ Consumer Products & Services | 350 | Cambridge | MA |
| 1082 | Zillion Technologies | 288% | $3.5 million | ■ IT Services | 30 | Falls Church | VA |
| 1126 | Ziller Electric | 279% | $8.9 million | ■ Construction | 26 | Orion | MI |
| 816 | Zieta Technologies | 361% | $6.5 million | ■ IT Services | 70 | Wilmington | DE |
| 2211 | Zia Engineering | 142% | $5.2 million | ■ Engineering | 94 | Las Cruces | NM |
| 1347 | Zhena's Gypsy Tea | 237% | $3.5 million | ■ Consumer Products & Services | 11 | Ojai | CA |
| 848 | Zeus Mortgage | 352% | $4.8 million | ■ Financial Services | 21 | Houston | TX |
| 1116 | ZeroChaos | 281% | $664 million | ■ Human Resources | 7995 | Orlando | FL |
| 103 | Zeon Solutions | 1,506% | $4.5 million | ■ IT Services | 19 | Milwaukee | WI |
| 9999 | ZenPrint | 775% | $2.9 million | ■ Software | 16 | Salt Lake City | UT |
| 646 | Zemoga | 429% | $4.9 million | ■ Advertising & Marketing | 70 | New York | NY |
| 3355 | Zekiah Technologies | 75% | $3.7 million | ■ Government Services | 28 | La Plata | MD |
| 9999 | Zee Law Group | 662% | $3.2 million | ■ Business Products & Services | 18 | Alhambra | CA |
| 348 | Zebra Imaging | 713% | $17 million | ■ Business Products & Services | 48 | Austin | TX |
| 2052 | Zebra Construction Company | 155% | $38.8 million | ■ Construction | 165 | Suwanee | GA |
| 3889 | ZAP Engineering & Construction Services | 56% | $7.5 million | ■ Energy | 3 | Lakewood | CO |
| 4071 | Z Corporation | 48% | $46.1 million | ■ Manufacturing | 150 | Burlington | MA |
| 1043 | YoungWilliams Child Support Services | 295% | $25.2 million | ■ Government Services | 575 | Jackson | MS |
| 4522 | Youngsoft | 30% | $15.2 million | ■ IT Services | 128 | Wixom | MI |
| 1811 | Yerba Buena Engineering & Construction | 176% | $14.6 million | ■ Construction | 35 | San Francisco | CA |
| 9999 | Yash Solutions | 1,171% | $8.6 million | ■ IT Services | 125 | Cumming | GA |
| 662 | YapStone | 418% | $17.5 million | ■ Financial Services | 57 | Walnut Creek | CA |
| 4634 | Yantis | 24% | $92.6 million | ■ Construction | 544 | San Antonio | TX |
| 1698 | Xylo Technologies | 188% | $10.1 million | ■ IT Services | 63 | Rochester | MN |
| 41 | Xtreme Consulting Group | 3,092% | $21.5 million | ■ Business Products & Services | 185 | Kirkland | WA |
| 1435 | Xtreme Communications | 223% | $4.7 million | ■ Telecommunications | 28 | Wood Village | OR |
| 3790 | Xtiva Financial Systems | 59% | $9.7 million | ■ Software | 44 | New York | NY |
| 1168 | Xterprise | 273% | $9 million | ■ Software | 55 | Carrollton | TX |
| 3609 | Xtensible Solutions | 65% | $3.1 million | ■ Energy | 15 | Greenwood Village | CO |
| 3049 | Xtelesis | 90% | $5.4 million | ■ Telecommunications | 30 | Burlingame | CA |
| 451 | XT Global | 576% | $13.8 million | ■ IT Services | 160 | Dallas | TX |
| 964 | XPO | 317% | $34 million | ■ Logistics & Transportation | 100 | Torrance | CA |
| 1708 | Xplane | 186% | $5.3 million | ■ Business Products & Services | 43 | Portland | OR |
| 952 | Xperience Days | 320% | $2.7 million | ■ Retail | 10 | Hoboken | NJ |
| 701 | XMLaw | 403% | $3.4 million | ■ Software | 25 | Braintree | MA |
| 3922 | XL Associates | 54% | $7.3 million | ■ Government Services | 110 | McLean | VA |
| 2613 | XIFIN | 113% | $9.1 million | ■ Software | 73 | San Diego | CA |
| 3209 | XeteX | 82% | $6.7 million | ■ Manufacturing | 35 | Minneapolis | MN |
| 3169 | XEI Scientific | 84% | $2.1 million | ■ Manufacturing | 8 | Redwood City, CA 94061 | CA |
| 1940 | Xchange Telecom | 164% | $19.6 million | ■ Telecommunications | 54 | Brooklyn | NY |
| 3674 | Xcentric | 63% | $4 million | ■ IT Services | 30 | Alpharetta | GA |
| 139 | XCEND Group | 1,266% | $5.3 million | ■ IT Services | 22 | Brighton | MI |
| 1701 | XCEL Solutions | 187% | $7.4 million | ■ Software | 100 | MATAWAN | NJ |
| 3414 | X-nth | 72% | $62.4 million | ■ Engineering | 361 | Maitland | FL |
| 2575 | Wynne Sedan & Limousine Group | 116% | $8.7 million | ■ Logistics & Transportation | 75 | Dallas | TX |
| 3067 | Wyatt Management | 88% | $9.1 million | ■ Construction | 16 | Hopkins | MN |
| 4832 | Wunderlich-Malec | 11% | $42.1 million | ■ Engineering | 170 | Minnetonka | MN |
| 1690 | Wright Total Indoor Comfort | 189% | $5.6 million | ■ Construction | 30 | Colorado Springs | CO |
| 2004 | Wpromote | 159% | $7.1 million | ■ Advertising & Marketing | 49 | El Segundo | CA |
| 616 | Worldwide Travel Staffing | 444% | $22.2 million | ■ Health | 239 | Tonawanda | NY |
| 916 | Worldwide Information Network Systems | 330% | $33.7 million | ■ Government Services | 200 | Seabrook | MD |
| 1767 | Worldways Social Marketing | 179% | $5.5 million | ■ Advertising & Marketing | 18 | Greenwood Village | CO |
| 1378 | WorldLink | 232% | $12 million | ■ Human Resources | 110 | Frisco | TX |
| 1477 | WorldDoc | 217% | $7.1 million | ■ Health | 59 | Las Vegas | NV |
| 1642 | WorldAPP | 196% | $4.3 million | ■ Software | 90 | Braintree | MA |
| 4540 | World Testing | 29% | $2.6 million | ■ Business Products & Services | 28 | Mount Juliet | TN |
| 155 | World Pac Paper | 1,182% | $25.5 million | ■ Business Products & Services | 15 | Cincinnati | OH |
| 4061 | World Micro Components | 48% | $17.4 million | ■ Business Products & Services | 45 | Roswell | GA |
| 4805 | World Emblem International | 14% | $18.8 million | ■ Business Products & Services | 500 | N. Miami | FL |
| 64 | Workway | 2,058% | $75.9 million | ■ Human Resources | 85 | Glendale | CA |
| 2028 | Worktank | 157% | $6.8 million | ■ Advertising & Marketing | 60 | Seattle | WA |
| 3604 | WorkSmart | 66% | $3.2 million | ■ IT Services | 25 | Durham | NC |
| 931 | Working Person's Store | 328% | $14.4 million | ■ Retail | 40 | Lakeville | IN |
| 20 | Working Media Group | 4,782% | $12.3 million | ■ Advertising & Marketing | 14 | New York | NY |
| 2528 | WorkForce Software | 118% | $15.8 million | ■ Software | 120 | Livonia | MI |
| 4590 | Woodruff-Sawyer | 27% | $61.2 million | ■ Insurance | 283 | San Francisco | CA |
| 3227 | Wongdoody | 81% | $23.6 million | ■ Advertising & Marketing | 146 | Culver City | CA |
| 1643 | Wolfmotell | 195% | $6.2 million | ■ Advertising & Marketing | 51 | Minneapolis | MN |
| 561 | Wolde Flooring | 482% | $5.2 million | ■ Construction | 15 | Madison | AL |
| 4604 | Wolcott Architecture Interiors | 26% | $8.1 million | ■ Consumer Products & Services | 50 | Culver City | CA |
| 2346 | Wojan Window & Door | 131% | $21.3 million | ■ Manufacturing | 150 | Charlevoix | MI |
| 1944 | WMPH Vacations | 164% | $5.2 million | ■ Travel & Hospitality | 51 | Delray Beach | FL |
| 3622 | WMK | 65% | $66.1 million | ■ Retail | 202 | Akron | OH |
| 2975 | WLX | 93% | $24.2 million | ■ Logistics & Transportation | 128 | Riverside | MO |
| 3124 | Wishon & Carter Builders | 86% | $40 million | ■ Construction | 55 | Yadkinville | NC |
| 1255 | Wise Payment Systems | 253% | $1.3 million | ■ Financial Services | 65 | Fishers | IN |
| 445 | Wise Men Consultants | 581% | $20.6 million | ■ IT Services | 250 | Houston | TX |
| 4892 | Wisdom InfoTech | 4% | $14.1 million | ■ IT Services | 105 | Brookfield | WI |
| 3781 | Wireless Zone | 59% | $201.2 million | ■ Retail | 95 | Middletown | CT |
| 1889 | Wireless World | 169% | $9.5 million | ■ Retail | 49 | Marion | NY |
| 1685 | Wireless Emporium | 190% | $3 million | ■ Telecommunications | 15 | Orange | CA |
| 1953 | Wireless Connection | 163% | $3.9 million | ■ Telecommunications | 34 | Hamilton | MT |
| 1998 | Wiredrive | 160% | $2.9 million | ■ Software | 22 | Marina del Rey | CA |
| 3585 | Winter, Wyman | 66% | $62 million | ■ Human Resources | 156 | Waltham | MA |
| 290 | Winshuttle | 801% | $8.7 million | ■ Software | 70 | Bothell | WA |
| 2883 | Wing Zone Franchise | 98% | $3.9 million | ■ Food & Beverage | 14 | Atlanta | GA |
| 2731 | Winery Exchange | 106% | $67.4 million | ■ Food & Beverage | 61 | Novato | CA |
| 4297 | Wineman Technology | 39% | $7.9 million | ■ Engineering | 42 | Saginaw | MI |
| 740 | WineCommune | 390% | $21.3 million | ■ Food & Beverage | 35 | Oakland | CA |
| 3059 | Windy City Wire | 89% | $76.4 million | ■ Manufacturing | 120 | Bolingbrook | IL |
| 3792 | Windy City Fieldhouse Corporate Events | 59% | $5.4 million | ■ Business Products & Services | 216 | Chicago | IL |
| 1144 | Windy City Distribution | 277% | $5.9 million | ■ Food & Beverage | 16 | Warrenville | IL |
| 1938 | Windmill International | 164% | $39.8 million | ■ Engineering | 125 | Nashua | NH |
| 4001 | Windham & McDonald Construction | 51% | $10.4 million | ■ Construction | 20 | Cordova | TN |
| 3530 | Winco | 68% | $14.2 million | ■ Health | 83 | Ocala | FL |
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