| Chevron Corporation |
13,634 |
| Science Applications International Corporation SAIC, Inc. |
2,944 |
| Bonneville Power Administration |
2,536 |
| American Electric Power Company, Inc. |
2,202 |
| ConocoPhillips Company |
2,052 |
| Duke Energy Corporation |
2,011 |
| Cummins, Inc. |
1,902 |
| City of Seattle, WA |
1,596 |
| Edison International |
1,365 |
| Archer-Daniels-Midland Company |
1,269 |
| Entergy Corporation |
1,113 |
| PG&E Corporation |
1,058 |
| Consolidated Edison Company of New York, Inc. |
1,038 |
| Florida Power & Light Company |
973 |
| Marathon Oil Corporation |
969 |
| El Paso Corporation |
932 |
| DTE Energy Company |
932 |
| Dominion Resources, Inc. |
808 |
| Los Alamos National Laboratory (LANL) |
737 |
| Energy Resources Conservation Board |
721 |
| GE Energy |
524 |
| Sunoco, Inc. |
499 |
| Trinity Industries, Inc. |
448 |
| Tesoro Corporation |
439 |
| AmeriGas Partners, L.P. |
416 |
| The Lubrizol Corporation |
406 |
| Westinghouse Electric Company |
399 |
| General Atomics |
372 |
| E.ON North America, Inc. |
288 |
| AGL Resources, Inc. |
282 |
| National Renewable Energy Laboratory |
273 |
| Alstom Power |
245 |
| Flint Hills Resources, LP |
220 |
| Bruce Power LP |
216 |
| TNP Enterprises, Inc. |
208 |
| Areva NC Inc |
205 |
| Cognex Corporation |
198 |
| Caterpillar Solar Turbines |
193 |
| CONSOL Energy Inc. |
193 |
| Covanta Energy Corporation |
191 |
| BNFL |
166 |
| EnerSys Inc. |
153 |
| Duquesne Light Holdings, Inc. |
151 |
| SunPower Corporation |
145 |
| Sai People Solutions, Inc |
135 |
| Langan Engineering and Environmental Services, Inc |
120 |
| Xantrex Technology |
105 |
| Ameresco, Inc. |
105 |
| Terasen Gas Inc. |
105 |
| American Petroleum Institute |
104 |
| Matheson Tri-Gas, Inc. |
103 |
| Ferrellgas Partners, L.P. |
93 |
| Sud-Chemie, Inc. |
93 |
| Canberra Industries |
91 |
| Capstone Turbine Corporation |
90 |
| Iberdrola Renewables |
89 |
| Veolia Energy North America |
84 |
| AeroVironment, Inc. |
82 |
| Advanced Energy Industries, Inc. |
81 |
| Grain Processing Corporation |
81 |
| Stowers Industrial Power |
78 |
| EnerNOC, Inc. |
72 |
| Ballard Power Systems Inc. |
72 |
| Horizon Wind Energy |
69 |
| GeoEngineers |
69 |
| Solatube International, Inc |
67 |
| Chesapeake Utilities Corporation |
65 |
| Evergreen Solar, Inc. |
64 |
| Walter Energy, Inc. |
61 |
| Andover Controls Corporation |
61 |
| GT Solar Incorporated |
61 |
| EXCO Resources, Inc. |
61 |
| Vestas Wind Systems |
60 |
| Advanced Energy Corporation |
57 |
| Lee County Electric Cooperative, Inc. |
56 |
| Dalkia PLC |
55 |
| Blue Rhino Corporation |
55 |
| W&T Offshore Inc |
55 |
| British Nulcear Group |
55 |
| Headwaters Incorporated |
54 |
| BBI International |
53 |
| WIKA Instrument Corporation |
51 |
| Energetics Inc |
51 |
| Invenergy LLC |
50 |
| The Baker Group |
49 |
| REC Solar, Inc. |
49 |
| New Jersey Resources Corporation |
48 |
| Elk Valley Coal Corporation |
48 |
| Wales Darby, Inc. |
48 |
| Northern Power Systems, Inc. |
47 |
| Energy Conversion Devices, Inc. |
45 |
| ATCO Electric Ltd. |
44 |
| ETS-Lindgren |
43 |
| ConEdison Solutions, Inc. |
43 |
| Enxco Inc. |
43 |
| IdaTech, LLC |
42 |
| Ecos Consulting |
41 |
| Syntroleum Corporation |
39 |
| Teledyne Energy Systems, Inc. |
39 |
| T3 Energy Services |
39 |
| Biovail |
39 |
| Energy Federation Incorporated |
38 |
| Active Power, Inc. |
36 |
| Ormat Technologies, Inc. |
36 |
| Nuvera Fuel Cells, Inc. |
36 |
| Green Mountain Energy Company |
35 |
| United Solar Ovonic |
34 |
| WaterFurnace International, Inc. |
34 |
| Environmental Power Corporation |
34 |
| SatCon Technology Corporation |
34 |
| Miasole |
34 |
| Davis Instruments Corp |
34 |
| Energy Enterprise Solutions |
34 |
| IAP Worldwide Services |
33 |
| SunEdison LLC |
33 |
| Aventine Renewable Energy Inc. |
33 |
| Celgard, LLC |
32 |
| Verenium Corporation |
32 |
| Capintec Instruments |
31 |
| Dessau-Soprin Inc. |
31 |
| Quicksilver Resources Inc. |
31 |
| Technology and Management Services |
31 |
| Arena Energy, LLC |
31 |
| SolarWorld |
31 |
| Petroleum Development Corporation |
30 |
| Conergy |
30 |
| SunWize Technologies Inc. |
30 |
| Proton Energy corp |
29 |
| Battery Enhancement Systems |
29 |
| Britannic Life |
29 |
| Renewable Choice Energy |
29 |
| Energy Capital, LLC |
29 |
| Energy Focus, Inc. |
28 |
| GridPoint Inc |
28 |
| Ridgewood Renewable Power |
28 |
| Renewable Energy Group Inc. |
28 |
| Cima Energy Ltd. |
28 |
| SolFocus Inc. |
27 |
| Solarcity Corporation |
27 |
| Suzlon Energy Limited |
27 |
| Standard Renewable Energy |
27 |
| DayStar Technologies, Inc. |
26 |
| Poet LLC |
26 |
| American Midwest Power |
26 |
| Ausra, Inc |
26 |
| Spark Energy |
26 |
| Gro Solar |
26 |
| Aldridge Electric, Inc. |
25 |
| Akeena Solar |
25 |
| Nexergy |
25 |
| ProEnergy Services |
25 |
| Voith Hydro |
25 |
| Viridian Group PLC |
24 |
| Noble Environmental Power, LLC |
24 |
| Sopogy |
24 |
| MIRATECH Corporation |
24 |
| Fuel Tech, Inc. |
24 |
| Bloom Energy |
24 |
| DanMar |
24 |
| RES-Americas Inc |
24 |
| Pacific Ethanol Inc. |
23 |
| Beacon Power Corporation |
23 |
| American Council On Renewable Energy |
23 |
| Holy Cross Energy |
23 |
| Heliovolt |
23 |
| ReliOn |
22 |
| EPV Solar, Inc. |
22 |
| Diamond Light Source Limited |
21 |
| QUANTUM FUEL SYSTEMS TECHNOLOGIES WORLDWIDE INC |
20 |
| Northeast Energy Efficiency Partnerships, Inc. |
20 |
| Horizon Utilities Corporation |
20 |
| Aircogen CHP Solutions |
20 |
| Gamesa Technology Corp |
20 |
| Cobasys |
19 |
| Kansas Wind Power |
19 |
| Midnight Solar |
19 |
| Adaptive Materials Inc. |
19 |
| M K Battery |
19 |
| Ocean Power Technologies, Inc. |
19 |
| NRG Systems, Inc. |
19 |
| Thermo Fluids, Inc |
19 |
| e-Solar, Inc. |
19 |
| Resource Environmental Associates Limited |
19 |
| Barnhart Crane & Rigging Co. |
18 |
| Alternative Energy Systems Consulting, Inc. |
18 |
| QuestAir Technologies, Inc. |
18 |
| Primary Energy |
18 |
| Mascoma Corporation |
18 |
| Stirling Energy Systems Inc. |
18 |
| REC Group |
18 |
| WGL Holdings, Inc. |
17 |
| Trico Electric Cooperative |
17 |
| Sterling Planet Inc |
17 |
| Infinite Power Solutions Inc. |
17 |
| SMA America, Inc. |
17 |
| National Power Corp |
17 |
| GreenShift Corporation |
17 |
| YuMe Networks |
17 |
| Yamaha Motor Canada Ltd. |
17 |
| Electrovaya Inc. |
16 |
