| Center for Nanophase Materials Sciences | Oak Ridge, Tennessee, United States |
| Center for Nanoscale Materials | Argonne, Illinois, United States |
| Center for Nanoscale Materials at Argonne National Laboratory | Argonne, Illinois, United States |
| Center for Nanoscale Systems (CNS) at Harvard University | Cambridge, Massachusetts, United States |
| Center for Nanospace Technologies Inc. | Huffman, Texas, United States |
| Center for Responsible Nanotechnology | Brooklyn, New York, United States |
| Central New York Technology Development Organization | Syracuse, New York, United States |
| Central Research Laboratories Ltd. | Middlesex, United Kingdom |
| Centre d'Elaboration de Matériaux et d'Etudes Structurales (CEMES) | Toulouse Cedex 4, France |
| Centre for Large Space Structures and Systems | Montreal, Quebec, France |
