Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
612 institutional managers reported holding IONQ for the quarter ended Mar 31, 2026. Together they hold about 54% of shares outstanding; the top 10 hold 35%. 80 opened new positions; 113 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 33.31M | 8.97% | $960.4M | trimmed -4.3% | 2021 Q4 |
| BlackRock | 29.87M | 8.05% | $861.2M | trimmed -0.7% | 2021 Q4 |
| Morgan Stanley | 21.16M | 5.70% | $610.0M | added +8.1% | 2021 Q4 |
| Defiance ETFs, LLC | 9.70M | 2.61% | $279.7M | added +1155.2% | 2025 Q4 |
| State Street | 9.27M | 2.50% | $267.3M | added +3.4% | 2021 Q4 |
| Geode Capital | 8.44M | 2.27% | $243.3M | added +4.5% | 2021 Q4 |
| UBS | 6.93M | 1.87% | $199.8M | added +30.6% | 2021 Q4 |
| Marex Group plc | 4.01M | 1.08% | $115.5M | trimmed -1.9% | 2025 Q1 |
| Goldman Sachs | 3.55M | 0.96% | $102.5M | added +93.8% | 2021 Q4 |
| Northern Trust | 3.24M | 0.87% | $93.3M | trimmed -1.3% | 2021 Q4 |
| Charles Schwab Investment Management | 2.90M | 0.78% | $83.7M | trimmed -0.6% | 2021 Q4 |
| Two Sigma | 2.34M | 0.63% | $67.6M | added +1241.5% | 2024 Q4 |
| D. E. Shaw | 1.90M | 0.51% | $54.8M | added +116.2% | 2024 Q4 |
| Clear Street Group INC. | 1.83M | 0.49% | $52.8M | trimmed -42.7% | 2025 Q3 |
| BNY Mellon | 1.82M | 0.49% | $52.3M | added +4.5% | 2021 Q4 |
| Bank OF America CORP /DE/ | 1.81M | 0.49% | $52.1M | trimmed -15.4% | 2021 Q4 |
| FMR (Fidelity) | 1.70M | 0.46% | $48.9M | trimmed -14.4% | 2021 Q4 |
| Legal & General Group PLC | 1.59M | 0.43% | $45.9M | added +17% | 2022 Q1 |
| HRT Financial LP | 1.46M | 0.39% | $42.2M | opened | 2025 Q1 |
| Jane Street | 1.45M | 0.39% | $41.9M | added +15990.7% | 2025 Q3 |
| T. Rowe Price | 1.44M | 0.39% | $41.4M | trimmed -64.2% | 2022 Q2 |
| Westfield Capital Management CO LP | 1.37M | 0.37% | $39.6M | added +23.2% | 2025 Q2 |
| National Bank OF Canada /FI/ | 1.33M | 0.36% | $38.4M | added +7219.8% | 2021 Q4 |
| Nuveen | 1.29M | 0.35% | $37.1M | trimmed -16.2% | 2022 Q2 |
| BNP Paribas Financial Markets | 1.25M | 0.34% | $36.2M | added +52.6% | 2024 Q4 |
| Nomura Asset Management International INC. | 1.25M | 0.34% | $36.0M | added +39.5% | 2025 Q4 |
| VAN ECK Associates CORP | 1.25M | 0.34% | $36.0M | added +59.9% | 2025 Q1 |
| Alyeska Investment Group | 1.12M | 0.30% | $32.2M | opened | 2026 Q1 |
| Cantor Fitzgerald, L. P. | 1.08M | 0.29% | $31.1M | trimmed -45.2% | 2025 Q3 |
| Susquehanna International Group | 1.08M | 0.29% | $31.0M | trimmed -32% | 2021 Q4 |
| Bank OF Montreal /CAN/ | 1.04M | 0.28% | $29.9M | trimmed -2.8% | 2023 Q4 |
| Wellington Management | 1.02M | 0.27% | $29.3M | trimmed -28.8% | 2025 Q1 |
| Dimensional Fund Advisors | 930.3k | 0.25% | $26.8M | added +19.7% | 2023 Q1 |
| Amundi | 927.0k | 0.25% | $26.7M | trimmed -0.9% | 2025 Q1 |
| Voya Investment Management LLC | 886.3k | 0.24% | $25.6M | trimmed -2.1% | 2022 Q2 |
| Swiss National Bank | 866.6k | 0.23% | $25.0M | added +7.1% | 2022 Q2 |
| Penserra Capital Management LLC | 816.2k | 0.22% | $23.5M | added +5.3% | 2021 Q4 |
| Heights Capital Management, INC | 815.5k | 0.22% | $23.5M | opened | 2026 Q1 |
| Deutsche Bank AG\ | 815.0k | 0.22% | $23.5M | trimmed -33% | 2022 Q2 |
| Lansdowne Partners (UK) LLP (focused) | 795.6k | 0.21% | $22.9M | added +23.8% | 2021 Q4 |
| Unicom Systems, INC. (focused) | 768.9k | 0.21% | $22.2M | unchanged | 2024 Q4 |
| Ghisallo Capital Management LLC | 750.0k | 0.20% | $21.6M | opened | 2026 Q1 |
| Chevy Chase Trust Holdings, LLC | 731.8k | 0.20% | $21.1M | added +20.7% | 2024 Q4 |
| LPL Financial LLC | 657.1k | 0.18% | $18.9M | unchanged | 2022 Q3 |
| Victory Capital Management INC | 647.5k | 0.17% | $18.7M | trimmed -64.7% | 2021 Q4 |
| Clearbridge Investments, LLC | 615.7k | 0.17% | $17.8M | trimmed -1.2% | 2025 Q2 |
| Sumitomo Mitsui Trust Group, INC. | 567.6k | 0.15% | $16.4M | trimmed -0.8% | 2025 Q4 |
| Quadrature Capital LTD | 565.3k | 0.15% | $16.3M | trimmed -1% | 2025 Q1 |
| Rockefeller Capital Management L.p. | 552.3k | 0.15% | $15.9M | added +8.1% | 2021 Q4 |
| Invesco | 545.8k | 0.15% | $15.7M | trimmed -10.8% | 2022 Q1 |
Largest 50 of 612 shown; the full ranked, searchable register is at boothcheck.com/holders/IONQ. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.