| Business | Phone |
| Assn-California Water Agencies 400 N Capitol St Nw # 357, Washington 20001 | (202) 434-4765 |
| Bae Systems 1250 24th St Nw, Washington 20037 | (202) 223-8808 |
| Battelle 901 D St Sw # 900, Washington 20024 | (202) 479-0500 |
| Carnegie Institution 5241 Broad Branch Rd Nw, Washington 20015 | (202) 686-4370 |
| Center To Protect Workers 111 Massachusetts Ave Nw # 509, Washington 20001 | (202) 962-8490 |
| Enterprise Research Institute 1001 Connecticut Ave Nw, Washington 20036 | (202) 363-6448 |
| Gas Research Institute 1331 Pennsylvania Ave Nw, Washington 20004 | (202) 662-8989 |
| Hellenic Studies Ctr 3100 Whitehaven St Nw, Washington 20008 | (202) 234-3738 |
| Lawrence Berkeley Laboratory 901 D St Sw # 950, Washington 20024 | (202) 646-7950 |
| Mathematica Policy Research 600 Maryland Ave Sw # 550, Washington 20024 | (202) 484-9220 |
| Mch Information Research Ctr 1220 L St Nw, Washington 20005 | (202) 898-5617 |
| Medlantic Research Foundation 100 Irving St Nw, Washington 20010 | (202) 877-3700 |
| Midwest Research Institute 409 12th St Sw, Washington 20024 | (202) 554-3844 |
| Nikko Research Ctr 2300 N St Nw, Washington 20037 | (202) 663-9027 |
| North Atlantic Research Inst 700 13th St Nw, Washington 20005 | (202) 434-8953 |
| Research & Policy Reform Ctr 1201 Pennsylvania Ave Nw # 300, Washington 20004 | (202) 624-3170 |
| Research Inst For Genetic 2233 Wisconsin Ave Nw, Washington 20007 | (202) 338-9580 |
| Saic Government Affairs 2020 K St Nw # 400, Washington 20006 | (202) 530-8900 |