| Abbreviation | Definition |
|---|---|
| NABLOA | National Australia Bank Limited |
| NABLOB | National Australia Bank Limited |
| NABLOC | National Australia Bank Limited |
| NABLOP | National Australia Bank Limited |
| NABLOQ | National Australia Bank Limited |
| NABLOR | National Australia Bank Limited |
| NABMMI | National Australia Bank Ltd |
| NABQRP | National Australia Bank Limited |
| NAD | North Australian Diamonds Ltd |
| NAD | North Australian Diamonds, LTD. |
| NAE | New Age Exploration Ltd |
| NAEO | New Age Exploration Limited |
| NAM | Namoi Cotton Co-operative Ltd |
| NAN | Nanosonics Ltd |
| NAV | Navigator Resources Ltd |
| NAVOB | Navigator Resources Limited |
| NBL | Noni B Ltd |
| NBS | Nexbis Limited |
| NCI | National Can Industries Ltd |
| NCK | Nick Scali Ltd |