目前共有 23 家機構持有 SS91，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 |
|---|---|---|
| Pacific Ridge Capital Partners, LLC | US$37.4萬 | 0.08% |
| GEODE CAPITAL MANAGEMENT, LLC | US$26.1萬 | 0.00% |
| VANGUARD CAPITAL MANAGEMENT LLC | US$22.1萬 | 0.00% |
| RENAISSANCE TECHNOLOGIES LLC | US$8.4萬 | 0.00% |
| VANGUARD FIDUCIARY TRUST CO | US$6.3萬 | 0.00% |
| BlackRock, Inc. | US$3.3萬 | 0.00% |
| NORTHERN TRUST CORP | US$2.2萬 | 0.00% |
| STATE STREET CORP | US$1.8萬 | 0.00% |
| TWO SIGMA SECURITIES, LLC | US$1.6萬 | 0.00% |
| RAYMOND JAMES FINANCIAL INC | US$1.4萬 | 0.00% |
| CITADEL ADVISORS LLC | US$1.2萬 | 0.00% |
| Virtu Financial LLC | US$9000.0 | 0.00% |
| WELLS FARGO & COMPANY/MN | US$7731.0 | 0.00% |
| UBS Group AG | US$7193.0 | 0.00% |
| GROUP ONE TRADING LLC | US$3218.0 | 0.00% |
| Vanguard Global Advisers, LLC | US$1815.0 | 0.00% |
| OSAIC HOLDINGS, INC. | US$30.0 | 0.00% |
| New England Capital Financial Advisors LLC | US$23.0 | 0.00% |
| MORGAN STANLEY | US$8.0 | 0.00% |
| JPMORGAN CHASE & CO | US$7.0 | 0.00% |
| DANSKE BANK A/S | US$1.0 | 0.00% |
| SBI Securities Co., Ltd. | US$1.0 | 0.00% |
| Russell Investments Group, Ltd. | US$1.0 | 0.00% |