Stock symbols range in length from 1 to 5 characters, and can be further broken down by exchange. There are many types of stocks, ranging from common to preferred, and with different classes.
For OTC Markets/PinkSheets Quotation service (Premium Service), you must enter the symbol as SYMBOL.PK. This symbol will contain only
the PinkSheet real time Quote data while entering the underlying stock symbol without the .PK will contain the trade information.
| Description | Suffix |
| Class A Stock | A |
| Class B Stock | B |
| Exempt from NASDAQ listing qualifications for a limited period | C |
| New issue of the base stock (i.e. result of a split) | D |
| Delinquent in required filings with SEC | E |
| Foreign | F |
| Convertible bond of base company | G |
| 2nd convertible | H |
| 3rd convertible | I |
| Voting share | J |
| Non-voting share | K |
| Misc. | L |
| 4th preferred of base company | M |
| 3rd preferred of base company | N |
| 2nd preferred of base company | O |
| 1st preferred of base company | P |
| In bankruptcy | Q |
| Rights | R |
| Shares of beneficial interest | S |
| With warrants or rights | T |
| Units | U |
| When issued and when distributed | V |
| Warrants | W |
| ADR - American Depositary Receipt | Y |
| Miscellaneous situations | Z |