目前共有 16 家機構持有 PROSY，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 |
|---|---|---|
| S&CO INC | US$2243.4萬 | 1.39% |
| Boston Common Asset Management, LLC | US$263.5萬 | 0.17% |
| RHUMBLINE ADVISERS | US$161.8萬 | 0.00% |
| DRW Securities, LLC | US$70.2萬 | 0.01% |
| YOUSIF CAPITAL MANAGEMENT, LLC | US$58.4萬 | 0.01% |
| GAMMA Investing LLC | US$40.6萬 | 0.02% |
| Calydon Capital | US$15.3萬 | 0.03% |
| Canopy Partners, LLC | US$10.9萬 | 0.04% |
| PNC FINANCIAL SERVICES GROUP, INC. | US$10.5萬 | 0.00% |
| Westside Investment Management, Inc. | US$3.5萬 | 0.01% |
| KELLEHER FINANCIAL ADVISORS | US$1.4萬 | 0.00% |
| Salomon & Ludwin, LLC | US$1.0萬 | 0.00% |
| Ascentis Wealth Management, LLC | US$3616.0 | 0.00% |
| IMA Advisory Services, Inc. | US$2016.0 | 0.00% |
| First Command Advisory Services, Inc. | US$352.0 | 0.00% |
| HANTZ FINANCIAL SERVICES, INC. | US$0.0 | 0.00% |