| Chevron Corporation |
13,459 |
| Science Applications International Corporation SAIC, Inc. |
3,229 |
| Bonneville Power Administration |
2,523 |
| American Electric Power Company, Inc. |
2,358 |
| ConocoPhillips Company |
2,184 |
| Duke Energy Corporation |
2,118 |
| Cummins, Inc. |
1,993 |
| City of Seattle, WA |
1,583 |
| Entergy Corporation |
1,416 |
| Edison International |
1,365 |
| Archer-Daniels-Midland Company |
1,330 |
| Consolidated Edison Company of New York, Inc. |
1,083 |
| PG&E Corporation |
1,079 |
| El Paso Corporation |
1,053 |
| Florida Power & Light Company |
1,042 |
| Marathon Oil Corporation |
946 |
| DTE Energy Company |
913 |
| Dominion Resources, Inc. |
899 |
| Los Alamos National Laboratory (LANL) |
748 |
| Energy Resources Conservation Board |
695 |
| Westinghouse Electric Company |
598 |
| Sunoco, Inc. |
521 |
| GE Energy |
520 |
| Trinity Industries, Inc. |
481 |
| Tesoro Corporation |
477 |
| AmeriGas Partners, L.P. |
461 |
| General Atomics |
403 |
| The Lubrizol Corporation |
396 |
| E.ON North America, Inc. |
311 |
| Platts |
290 |
| National Renewable Energy Laboratory |
288 |
| AGL Resources, Inc. |
282 |
| Alstom Power |
260 |
| TNP Enterprises, Inc. |
234 |
| Flint Hills Resources, LP |
226 |
| Areva NC Inc |
218 |
| Cognex Corporation |
207 |
| Bruce Power LP |
206 |
| CONSOL Energy Inc. |
200 |
| Caterpillar Solar Turbines |
199 |
| Covanta Energy Corporation |
193 |
| Duquesne Light Holdings, Inc. |
191 |
| EnerSys Inc. |
175 |
| SunPower Corporation |
169 |
| Sai People Solutions, Inc |
140 |
| Langan Engineering and Environmental Services, Inc |
137 |
| Stowers Industrial Power |
119 |
| Terasen Gas Inc. |
113 |
| Xantrex Technology |
108 |
| Ameresco, Inc. |
108 |
| Sud-Chemie, Inc. |
103 |
| American Petroleum Institute |
102 |
| Matheson Tri-Gas, Inc. |
100 |
| Advanced Energy Corporation |
97 |
| Canberra Industries |
96 |
| Ferrellgas Partners, L.P. |
96 |
| AeroVironment, Inc. |
94 |
| Advanced Energy Industries, Inc. |
93 |
| Capstone Turbine Corporation |
92 |
| Iberdrola Renewables |
91 |
| Sonat Power Marketing LP |
85 |
| Veolia Energy North America |
85 |
| EnerNOC, Inc. |
80 |
| Chesapeake Utilities Corporation |
78 |
| Grain Processing Corporation |
78 |
| Evergreen Solar, Inc. |
74 |
| GeoEngineers |
73 |
| Horizon Wind Energy |
67 |
| Andover Controls Corporation |
67 |
| Vestas Wind Systems |
67 |
| Ballard Power Systems Inc. |
66 |
| Solatube International, Inc |
66 |
| GT Solar Incorporated |
65 |
| Energetics Inc |
62 |
| EXCO Resources, Inc. |
59 |
| Blue Rhino Corporation |
59 |
| Abound Solar, Inc. |
58 |
| W&T Offshore Inc |
56 |
| WIKA Instrument Corporation |
56 |
| Walter Energy, Inc. |
55 |
| Lee County Electric Cooperative, Inc. |
54 |
| BBI International |
54 |
| Headwaters Incorporated |
54 |
| REC Solar, Inc. |
53 |
| Invenergy LLC |
52 |
| New Jersey Resources Corporation |
51 |
| ETS-Lindgren |
51 |
| Nuvera Fuel Cells, Inc. |
50 |
| Active Power, Inc. |
49 |
| Northern Power Systems, Inc. |
46 |
| Enxco Inc. |
46 |
| Celgard, LLC |
45 |
| Wales Darby, Inc. |
45 |
| Green Mountain Energy Company |
44 |
| Energy Conversion Devices, Inc. |
44 |
| ConEdison Solutions, Inc. |
43 |
| IdaTech, LLC |
43 |
| Verenium Corporation |
42 |
| United Solar Ovonic |
41 |
| Syntroleum Corporation |
41 |
| The Baker Group |
40 |
| ATCO Electric Ltd. |
40 |
| SatCon Technology Corporation |
40 |
| Energy Focus, Inc. |
40 |
| Miasole |
40 |
| Ormat Technologies, Inc. |
39 |
| GridPoint Inc |
39 |
| Energy Federation Incorporated |
39 |
| Ecos Consulting |
38 |
| SunEdison LLC |
38 |
| Biovail |
38 |
| RES-Americas Inc |
38 |
| Renewable Energy Group Inc. |
37 |
| Wicat Systems, Inc. |
37 |
| Environmental Power Corporation |
36 |
| SunWize Technologies Inc. |
36 |
| Elk Valley Coal Corporation |
36 |
| T3 Energy Services |
36 |
| Voith Hydro |
36 |
| Teledyne Energy Systems, Inc. |
35 |
| WaterFurnace International, Inc. |
34 |
| IAP Worldwide Services |
34 |
| Conergy |
34 |
| Poet LLC |
34 |
| Energy Enterprise Solutions |
34 |
| SolarWorld |
34 |
| Capintec Instruments |
33 |
| Quicksilver Resources Inc. |
33 |
| Aventine Renewable Energy Inc. |
32 |
| Alternative Energy Systems Consulting, Inc. |
32 |
| Petroleum Development Corporation |
31 |
| Battery Enhancement Systems |
31 |
| Technology and Management Services |
31 |
| Arena Energy, LLC |
31 |
| Ausra, Inc |
31 |
| Viridian Group PLC |
30 |
| A*Star |
30 |
| Davis Instruments Corp |
30 |
| ProEnergy Services |
30 |
| Dalkia PLC |
29 |
| SolFocus Inc. |
29 |
| Suzlon Energy Limited |
29 |
| Standard Renewable Energy |
29 |
| Gro Solar |
29 |
| Energy Capital, LLC |
29 |
| ReliOn |
28 |
| Dessau-Soprin Inc. |
28 |
| Renewable Choice Energy |
28 |
| MIRATECH Corporation |
28 |
| Proton Energy corp |
27 |
| Ridgewood Renewable Power |
27 |
| Fuel Tech, Inc. |
27 |
| Aldridge Electric, Inc. |
26 |
| DayStar Technologies, Inc. |
26 |
| Nexergy |
26 |
| American Council On Renewable Energy |
26 |
| Noble Environmental Power, LLC |
26 |
| Cima Energy Ltd. |
26 |
| Sopogy |
26 |
| Pacific Ethanol Inc. |
25 |
| Heliovolt |
25 |
| Solarcity Corporation |
25 |
| American Midwest Power |
25 |
| DanMar |
25 |
| Spark Energy |
25 |
| Beacon Power Corporation |
24 |
| Kansas Wind Power |
24 |
| Holy Cross Energy |
24 |
| Bloom Energy |
24 |
| Trico Electric Cooperative |
22 |
| Akeena Solar |
22 |
| Ocean Power Technologies, Inc. |
22 |
| Solazyme, Inc. |
22 |
| EPV Solar, Inc. |
21 |
| Adaptive Materials Inc. |
21 |
| Borrego Solar Systems Inc |
21 |
| M K Battery |
21 |
| World Energy Alternatives |
21 |
| REC Group |
21 |
| GreenShift Corporation |
21 |
| Diamond Light Source Limited |
21 |
| Alteris Renewables, Inc. |
21 |
| Cobasys |
20 |
| Britannic Life |
20 |
| Infinite Power Solutions Inc. |
20 |
| Horizon Utilities Corporation |
20 |
| Thermo Fluids, Inc |
20 |
| Resource Environmental Associates Limited |
20 |
| Sterling Planet Inc |
19 |
| NRG Systems, Inc. |
19 |
| Golden Triangle Energy Coop |
19 |
| Barnhart Crane & Rigging Co. |
18 |
| Nanosolar, Inc. |
18 |
| QuestAir Technologies, Inc. |
18 |
| Mascoma Corporation |
18 |
| Northeast Energy Efficiency Partnerships, Inc. |
18 |
| Mountain Area Information Network |
18 |
| Stirling Energy Systems Inc. |
18 |
| Boston-Power, Inc. |
18 |
| SMA America, Inc. |
18 |
