目前共有 16 家机构持有 BSBK，以下按持股市值由高至低排序。
| 主要持有机构 | 总市值 | 平均占比 |
|---|---|---|
| M3F, Inc. | US$419.7万 | 1.04% |
| VANGUARD CAPITAL MANAGEMENT LLC | US$146.1万 | 0.00% |
| GEODE CAPITAL MANAGEMENT, LLC | US$42.9万 | 0.00% |
| FMR LLC | US$39.4万 | 0.00% |
| RENAISSANCE TECHNOLOGIES LLC | US$26.6万 | 0.00% |
| BANK OF AMERICA CORP /DE/ | US$26.2万 | 0.00% |
| NORTHERN TRUST CORP | US$20.9万 | 0.00% |
| VANGUARD FIDUCIARY TRUST CO | US$19.4万 | 0.00% |
| BEESE FULMER INVESTMENT MANAGEMENT, INC. | US$13.0万 | 0.01% |
| Cetera Investment Advisers | US$12.8万 | 0.00% |
| BlackRock, Inc. | US$10.3万 | 0.00% |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | US$2.7万 | 0.00% |
| UBS Group AG | US$2.3万 | 0.00% |
| Vanguard Global Advisers, LLC | US$2.0万 | 0.00% |
| Tower Research Capital LLC (TRC) | US$2354.0 | 0.00% |
| CITIGROUP INC | US$9.0 | 0.00% |