| Abbreviation | Definition |
|---|---|
| NHTBP | New Hampshire Thrift Bancshares Preferred |
| NHTC | Natural Health Trends Corporation |
| NIAG | Niagara Corporation |
| NIAR | North American Resorts, Inc. |
| NIBMF | Mighty Beaut Minerals, Inc. |
| NICE | N I C E Systems, LTD. |
| NICH | Nitches, Inc. |
| NICK | Nicholas Financial, Inc. |
| NICO | NetHoldings.com, Inc. |
| NIFS | ational Integrated Food |
| NIFS | National Integrated Food |
| NIGI | Nightwing Group, Inc. |
| NIKU | Niku Corporation |
| NIMU | Non Invasive Monitor Systems |
| NINE | Number Nine Visual Technology Corporation |
| NIPNY | N E C Corporation |
| NIPSM | Northern Industries Public Service Company |
| NIPSM | Northern Industries Public Service Company (de-listed) |
| NIPSM | Northern Industries Public Service Company (de-listed) |
| NIPSN | Northern Industries Public Service Company |