IonQ, Inc. (IONQ) Institutional Ownership
As of the Mar 31, 2026 13F filing cycle, 530 institutions reported holding IonQ, Inc. (IONQ), together worth $5.46B. Compared to Dec 31, 2025: 258 increased their position, 0 opened a new one, 177 trimmed, and 0 fully exited, a net addition of 13.23M shares. The 10 largest institutional holders control +86% of all institutionally-held shares. Notable names on the list include TWO SIGMA INVESTMENTS, LP, MILLENNIUM MANAGEMENT LLC, CITADEL ADVISORS LLC.
As of the Mar 31, 2026 13F filing cycle, compared to Dec 31, 2025. Institutions have up to 45 days after quarter-end to file, so this can lag real-time positioning.
The largest position increases, new positions, decreases, and confirmed exits this cycle. Percent-change lists below require at least a $1M prior-quarter position, so a fund going from a handful of shares to a few thousand does not crowd out real, sized moves.
A small, non-exhaustive list of well-known funds and passive index giants we checked for by name, not a comprehensive classification of every institution on record.
These alone represent about +27% of total institutional value on record, a rough floor for index-driven (not conviction-driven) ownership.
"Since prior quarter" return uses each holder's prior-quarter value divided by prior-quarter shares as a rough implied entry price, not their real cost basis, which is not disclosed in 13F filings.
| Institution | Status | Shares | Value | Change | Since Prior Qtr |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | Unclear (Last Known) | 34.77M | $1.56B | — | -12.6% |
| BlackRock, Inc. | Decreased | 29.87M | $861.18M | -0.69% | -12.6% |
| MORGAN STANLEY | Increased | 21.16M | $610.04M | +8.14% | -12.6% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 12.44M | $358.68M | +14.92% | -12.6% |
| Defiance ETFs, LLC | Increased | 9.70M | $279.72M | +1155.19% | -13.5% |
| STATE STREET CORP | Increased | 9.27M | $267.28M | +3.44% | -12.6% |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 8.44M | $242.92M | +4.53% | -12.5% |
| GOLDMAN SACHS GROUP INC | Increased | 6.30M | $181.74M | +243.82% | -12.6% |
| UBS Group AG | Increased | 6.13M | $176.79M | +43.14% | -12.6% |
| JANE STREET GROUP, LLC | Increased | 5.33M | $153.59M | +84.91% | -12.6% |
| Marex Group plc | Decreased | 4.01M | $115.49M | -1.90% | -12.6% |
| CITADEL ADVISORS LLC | Decreased | 3.30M | $95.10M | -15.04% | -12.6% |
| NORTHERN TRUST CORP | Decreased | 3.24M | $93.27M | -1.28% | -12.6% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Decreased | 2.90M | $83.66M | -0.60% | -12.6% |
| D. E. Shaw & Co., Inc. | Increased | 2.56M | $73.72M | +21.69% | -12.6% |
| TWO SIGMA INVESTMENTS, LP | Increased | 2.47M | $71.13M | +483.05% | -12.6% |
| CANTOR FITZGERALD, L. P. | Decreased | 2.32M | $66.81M | -44.70% | -12.6% |
| NOMURA HOLDINGS INC | Increased | 2.17M | $62.43M | +54.77% | -12.6% |
| BANK OF MONTREAL /CAN/ | Decreased | 1.87M | $53.82M | -1.35% | -12.6% |
| Clear Street Group Inc. | Decreased | 1.83M | $52.80M | -42.69% | -12.6% |
How many institutions hold IONQ stock?
530 institutions reported a position in IonQ, Inc. as of the Mar 31, 2026 13F filing cycle, worth a combined $5.46B.
Are institutions buying or selling IONQ?
Comparing Mar 31, 2026 to Dec 31, 2025: 258 institutions increased their position and 0 opened new ones, while 177 decreased and 0 fully exited. Net share change: 13.23M.
How concentrated is institutional ownership of IONQ?
The top 10 institutional holders control +86% of all shares held by institutions on record, a fairly concentrated group of holders.
How current is this institutional ownership data?
This reflects the Mar 31, 2026 13F filing cycle. Institutional investors have up to 45 days after quarter-end to file, so this data can lag real-time positioning by 1-3 months, and only U.S.-registered institutional managers above the SEC's reporting threshold are required to file at all.