| 1 | NGCX | National Gypsum (Canada) Ltd. | added 10/2003; eliminated 4/2004; 7/2005 (not listed) | | NAKINA |
| 2 | NGCX | Suburban Propane Nat-Gas Co. of New Jersey | added 1/1955; eliminated 1/1956 | | NAKINA |
| 3 | NGCX | Natural Gas Co. | 4/1947-7/1954; eliminated 1/1955 | | NAKINA |
| 4 | NGCX | Natural Gas Co. of N.J. | 1/1945-1/1946 | | NAKINA |
| 5 | NGCX | Natural Gas Co. | Jan-52 | | NRHS |
| 6 | NGCX | *SUBURBAN PROPANE NAT-GAS CO. OF NEW JERSEY [NATURAL GAS CO.] | | | PWRC |
| 7 | NGCX | +NATIONAL GYPSUM (CANADA) LIMITED | | | PWRC |
| 8 | NGCX | NATIONAL GYPSUM (CANADA) LTD | | | SCAC4 |
