| Abbreviation | Definition |
|---|---|
| BKST | Brookstone, Inc. |
| BKTI | Bank of Tidewater, Virginia |
| BKUNA | BankUnited Financial Corporation Class A |
| BKUNZ | Bank United Capital |
| BKUT | Bank of Utica, New York |
| BKVZY | Bank Vozrozhdeniye |
| BKWP | Bank of Westport Connecticut |
| BKYF | Bank Kentucky Financial Corporation |
| BLCA | Borel Bank & Trust of San Mateo |
| BLCI | Brookdale Living Communities, Inc. |
| BLDP | Ballard Power Systems, Inc. |
| BLGMY | Buffelsfontein Gold Mines |
| BLKVO | Blackstone Valley Electric |
| BLKVP | Blackstone Valley Electric Preferred |
| BLLS | Billserv.com, Inc. |
| BLMT | Belmont Bancorp |
| BLND | British Land Company Research |
| BLOCA | Block Drug Company, Inc. Class A |
| BLPG | Boron, Lepore, and Associates |
| BLPT | BluePointLinux |