| Naics index | Naics index description |
|---|---|
| 523999 | Deposit brokers |
| 523999 | Exchange clearinghouses, commodities or securities |
| 523999 | Gas lease brokers' offices |
| 523999 | Oil lease brokers' offices |
| 523999 | Protective committees, security holders |
| 523999 | Quotation services, securities |
| 523999 | Quotation services, stock |
| 523999 | Securities holders' protective services |
| 523999 | Securities transfer agencies |
| 523999 | Stock quotation services |