目前共有 12 家機構持有 IONZ，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 |
|---|---|---|
| MYDA Advisors LLC | US$87.2萬 | 0.14% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | US$80.7萬 | 0.00% |
| CITADEL ADVISORS LLC | US$70.1萬 | 0.00% |
| Belvedere Trading LLC | US$60.2萬 | 0.00% |
| StoneX Group Inc. | US$27.6萬 | 0.01% |
| Revere Asset Management, Inc | US$24.1萬 | 0.12% |
| Optiver Holding B.V. | US$21.6萬 | 0.00% |
| UBS Group AG | US$2.1萬 | 0.00% |
| GROUP ONE TRADING LLC | US$5453.0 | 0.00% |
| OSAIC HOLDINGS, INC. | US$1245.0 | 0.00% |
| SIMPLEX TRADING, LLC | US$174.0 | 0.00% |
| CITIGROUP INC | US$25.0 | 0.00% |