17 institutions reported holding $141.7M of IONQ INC (IONQ.WS) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($61.3M), SIMPLEX TRADING, LLC ($37.6M), GROUP ONE TRADING LLC ($27.0M), JPMORGAN CHASE & CO ($7.2M), FLOW TRADERS U.S. LLC ($3.0M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $61.3M | 2.1M | Trimmed |
| 2 | SIMPLEX TRADING, LLC | $37.6M | 1.3M | Trimmed |
| 3 | GROUP ONE TRADING LLC | $27.0M | 935,700 | Trimmed |
| 4 | JPMORGAN CHASE & CO | $7.2M | 268,900 | New |
| 5 | FLOW TRADERS U.S. LLC | $3.0M | 175,698 | Added |
| 6 | Aristides Capital LLC | $2.9M | 100,000 | Trimmed |
| 7 | HRT FINANCIAL LP | $1.5M | 51,000 | New |
| 8 | MILLENNIUM MANAGEMENT LLC | $778,500 | 45,000 | Hold |
| 9 | Saba Capital Management, L.P. | $568,855 | 32,248 | Hold |
| 10 | Financial Connections Group, Inc. | $18,000 | 650 | Hold |
| 11 | UBS Group AG | $5,311 | 307 | New |
| 12 | Royal Bank of Canada | $4,000 | 250 | New |
| 13 | OSAIC HOLDINGS, INC. | $855 | 1 | Hold |
| 14 | Markin Volterra Fund LP | $0 | 0 | Exited |
| 15 | Virtu Financial LLC | $0 | 0 | Exited |
| 16 | LMR Partners LLP | $0 | 0 | Exited |
| 17 | UNICOM Systems, Inc. | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31