| GREAT LAKES DREDGE & DOCK CORPORATION | HECHT LATHAM SPENCER & ASSOCIATES, INC., FORMERLY KNOWN AS HECHT SPENCER & ASSOC | Q4 2011 | Transportation, Marine/Maritime/Boating/Fisheries, Budget/Appropriations |
| CLEAN ENERGY FUELS CORPORATION | HECHT LATHAM SPENCER & ASSOCIATES, INC., FORMERLY KNOWN AS HECHT SPENCER & ASSOC | Q1 2011 | Transportation, Taxation/Internal Revenue Code, Fuel/Gas/Oil |
| 3M COMPANY | HECHT LATHAM SPENCER & ASSOCIATES, INC., FORMERLY KNOWN AS HECHT SPENCER & ASSOC | Q4 2010 | Environment/Superfund, Health Issues, Transportation |
| LEADING BUILDERS OF AMERICA, INC. | HECHT LATHAM SPENCER & ASSOCIATES, INC., FORMERLY KNOWN AS HECHT SPENCER & ASSOC | Q3 2010 | Environment/Superfund, Real Estate/Land Use/Conservation, Banking |
| EMERGENT BIOSOLUTIONS | HECHT LATHAM SPENCER & ASSOCIATES, INC., FORMERLY KNOWN AS HECHT SPENCER & ASSOC | Q3 2010 | Homeland Security, Health Issues, Disaster Planning/Emergencies |
| FIX HOUSING FIRST COALITION | HECHT LATHAM SPENCER & ASSOCIATES, INC., FORMERLY KNOWN AS HECHT SPENCER & ASSOC | Q4 2009 | Taxation/Internal Revenue Code, Banking, Housing |
| HOMES FOR AMERICA ALLIANCE, INC. | HECHT LATHAM SPENCER & ASSOCIATES, INC., FORMERLY KNOWN AS HECHT SPENCER & ASSOC | Q4 2009 | Taxation/Internal Revenue Code |
| DRIFTWOOD PROPERTIES LLC | HECHT LATHAM SPENCER & ASSOCIATES, INC., FORMERLY KNOWN AS HECHT SPENCER & ASSOC | Q4 2008 | Clean Air and Water (quality), Real Estate/Land Use/Conservation |
| CASPIAN TRUST | HECHT LATHAM SPENCER & ASSOCIATES, INC., FORMERLY KNOWN AS HECHT SPENCER & ASSOC | Q4 2008 | Foreign Relations, Civil Rights/Civil Liberties, Law Enforcement/Crime/Criminal Justice |