目前共有 8 家機構持有 MBSX，以下依持股市值由高至低排序。
| 主要持有機構 | 總市值 | 平均佔比 |
|---|---|---|
| Castleview Partners, LLC | US$844.3萬 | 4.33% |
| Auour Investments LLC | US$340.5萬 | 1.07% |
| Camarda Financial Advisors, LLC | US$188.4萬 | 0.99% |
| BlackDiamond Wealth Management, LLC | US$89.2萬 | 0.43% |
| CITADEL ADVISORS LLC | US$43.3萬 | 0.00% |
| JANE STREET GROUP, LLC | US$32.7萬 | 0.00% |
| Diesslin Group, Inc. | US$25.6萬 | 0.12% |
| JPMORGAN CHASE & CO | US$5322.0 | 0.00% |