Quantum Computing, Inc. (QUBT) Ownership
QUBT ownership summary
as of October 17, 2026- Institutions
- 47.9% of shares outstanding
- Insiders
- 12.16% of shares outstanding
- Shares outstanding
- 226.3M
- Float
- 200.6M shares available to trade
- Short interest
- 33.63% 67.3M shares short
- Days to cover
- 9.86 short interest up 4.1% vs prior month
- Institutions 47.90%
- Insiders 12.16%
- Other investors 39.94%
QUBT top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 7.83% | 17.7M | $112.8M | +1.6M (+9.9%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 3.91% | 8.8M | $56.3M | +86,586 (+1.0%) | June 30, 2026 |
| 3 | Defiance ETFs, LLC | 3.11% | 7.0M | $44.7M | +2.5M (+56.5%) | June 30, 2026 |
| 4 | Penserra Capital Management, LLC | 3.08% | 7.0M | $44.4M | +3.6M (+108.3%) | June 30, 2026 |
| 5 | Vanguard Portfolio Management, LLC | 2.90% | 6.6M | $41.8M | −143,542 (−2.1%) | June 30, 2026 |
| 6 | Geode Capital Management, LLC | 2.35% | 5.3M | $33.9M | +622,343 (+13.2%) | June 30, 2026 |
| 7 | State Street Corp | 2.17% | 4.9M | $31.3M | +404,497 (+9.0%) | June 30, 2026 |
| 8 | Morgan Stanley - Brokerage Accounts | 1.45% | 3.3M | $20.9M | +971,285 (+41.9%) | June 30, 2026 |
| 9 | Marex Group Ltd | 1.02% | 2.3M | $14.6M | −2.2M (−48.7%) | June 30, 2026 |
| 10 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 1.00% | 2.3M | $14.5M | +69,232 (+3.1%) | June 30, 2026 |
| 11 | UBS Group AG | 0.90% | 2.0M | $13.0M | +729,508 (+55.4%) | June 30, 2026 |
| 12 | Bank of New York Mellon Corp | 0.87% | 2.0M | $12.6M | +953,093 (+93.2%) | June 30, 2026 |
| 13 | Northern Trust Corp | 0.80% | 1.8M | $11.5M | +126,010 (+7.5%) | June 30, 2026 |
| 14 | Charles Schwab Investment Management Inc | 0.73% | 1.6M | $10.4M | +149,534 (+10.0%) | June 30, 2026 |
| 15 | Mubadala Investment Company PJSC | 0.70% | 1.6M | $10.1M | — | June 30, 2026 |
| 16 | Capital Fund Management SA | 0.67% | 1.5M | $9.6M | −195,702 (−11.5%) | June 30, 2026 |
| 17 | NATIONAL BANK OF CANADA /FI/ | 0.64% | 1.5M | $9.3M | +1.3M (+948.0%) | June 30, 2026 |
| 18 | Clear Street Group Inc | 0.63% | 1.4M | $9.1M | +585,780 (+69.6%) | June 30, 2026 |
| 19 | Van Eck Associates Corporation | 0.58% | 1.3M | $8.4M | +345,750 (+35.6%) | June 30, 2026 |
| 20 | Vanguard Fiduciary Trust Co | 0.58% | 1.3M | $8.3M | −41,906 (−3.1%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 15 holders added 14.1M shares and 4 cut 2.6M.
QUBT top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Defiance Quantum ETF | 3.03% | 6.9M | $43.6M | +36,640 (+0.5%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.86% | 6.5M | $41.1M | +6,550 (+0.1%) | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.36% | 5.3M | $34.0M | −61,632 (−1.1%) | September 30, 2026 |
| 4 | Vanguard Information Technology ETF | 2.24% | 5.1M | $32.3M | −7,389 (−0.1%) | August 31, 2026 |
| 5 | Global X Artfcl Intlgc & Tech ETF | 1.55% | 3.5M | $22.3M | — | September 30, 2026 |
| 6 | VanEck Quantum Cmptg ETF A USD Acc | 1.04% | 2.4M | $15.0M | — | September 30, 2026 |
| 7 | Fidelity Small Cap Index | 1.00% | 2.3M | $14.4M | +17,495 (+0.8%) | July 31, 2026 |
| 8 | iShares Russell 2000 Value ETF | 0.73% | 1.6M | $10.5M | +2,496 (+0.2%) | September 30, 2026 |
| 9 | WisdomTree Quantum Computing ETF USD Acc | 0.72% | 1.6M | $10.3M | +22,057 (+1.4%) | September 30, 2026 |
| 10 | Vanguard Russell 2000 ETF | 0.52% | 1.2M | $7.5M | +27,984 (+2.4%) | August 31, 2026 |
| 11 | Schwab US Small-Cap ETF™ | 0.47% | 1.1M | $6.8M | +720 (+0.1%) | September 30, 2026 |
| 12 | Fidelity Extended Market Index | 0.42% | 942K | $6.0M | −7,108 (−0.7%) | August 31, 2026 |
| 13 | WisdomTree Quantum Computing Fund | 0.38% | 869K | $5.5M | +7,924 (+0.9%) | September 30, 2026 |
| 14 | iShares Quantum Computing ETF $ Acc | 0.34% | 762K | $4.8M | — | September 30, 2026 |
| 15 | Jupiter Merian Glb Eq Abs Rt I USD Acc | 0.28% | 638K | $4.1M | +638,349 (0.0%) | December 31, 2025 |
| 16 | Fidelity MSCI Information Tech ETF | 0.28% | 629K | $4.0M | +425 (+0.1%) | September 30, 2026 |
| 17 | Schwab Small Cap Index | 0.22% | 501K | $3.2M | — | August 31, 2026 |
| 18 | Permanent Portfolio Permanent I | 0.22% | 500K | $3.2M | — | September 30, 2026 |
| 19 | Permanent Portfolio Aggressive Growth I | 0.22% | 500K | $3.2M | — | September 30, 2026 |
| 20 | First Trust Small Cap Gr AlphaDEX® ETF | 0.18% | 397K | $2.5M | +701 (+0.2%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
QUBT insider transactions
latest 19| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-11 | Christopher Bruce Roberts | Sell | $7.85 | 9,360 | $73,476 |
| 2026-03-10 | Christopher Bruce Roberts | Sell | $7.85 | 68,902 | $540,881 |
| 2026-01-07 | Milan Begliarbekov | Sell | $11.85 | 2,860 | $33,891 |
| 2025-09-15 | Robert B Fagenson | Sell | $16.88 | 5,000 | $84,400 |
| 2025-09-12 | Robert B Fagenson | Sell | $15.62 | 15,000 | $234,300 |
| 2025-09-11 | Robert B Fagenson | Sell | $15.63 | 30,000 | $468,900 |
| 2025-09-10 | Robert B Fagenson | Sell | $15.52 | 35,000 | $543,200 |
| 2025-09-09 | Robert B Fagenson | Sell | $15.02 | 15,000 | $225,300 |
| 2025-09-08 | Javad Shabani | Sell | $15.26 | 17,474 | $266,653 |
| 2025-09-05 | Javad Shabani | Sell | $15.30 | 20,000 | $306,000 |
| 2025-09-04 | Yuping Huang | Sell | $14.41 | 1,000,000 | $14.4M |
| 2025-08-25 | Pouya Dianat | Sell | $15.53 | 17,175 | $266,728 |
| 2025-06-12 | Christopher Boehmler | Sell | $20.00 | 46,440 | $928,800 |
| 2025-06-11 | Christopher Boehmler | Sell | $19.92 | 83,495 | $1.7M |
| 2025-06-10 | Christopher Boehmler | Sell | $15.96 | 96,679 | $1.5M |
| 2025-06-09 | Christopher Boehmler | Sell | $15.00 | 92,271 | $1.4M |
| 2025-06-09 | Michael C. Turmelle | Sell | $14.18 | 200,986 | $2.8M |
| 2025-05-19 | Javad Shabani | Sell | $11.66 | 39,973 | $466,085 |
| 2025-05-19 | Yuping Huang | Sell | $11.70 | 500,000 | $5.8M |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
QUBT shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns QUBT
Institutional investors own 47.9% of Quantum Computing's shares and insiders 12.16%. The largest holder is BlackRock Inc with 7.83% of the shares (17.7M), as of June 30, 2026. Among the top 20 institutions, 15 added shares and 4 reduced their stake in the latest filings. Short interest is 33.63% of the float, or 9.86 days of average trading volume. The share count rose 61,543.4% since 2010.
Related: QUBT analyst forecast, QUBT key metrics. See the QUBT stock overview for the latest quote and news.
QUBT ownership FAQ
Who owns the most Quantum Computing stock?
The largest shareholders of Quantum Computing are BlackRock Inc (7.83%), Vanguard Capital Management, LLC (3.91%), Defiance ETFs, LLC (3.11%), Penserra Capital Management, LLC (3.08%), Vanguard Portfolio Management, LLC (2.90%).
What percentage of Quantum Computing is owned by institutions?
Institutions hold 47.9% of Quantum Computing's shares outstanding; insiders hold 12.16%.
Which funds own Quantum Computing?
The largest fund holders of Quantum Computing are Defiance Quantum ETF (3.03%), Vanguard MStar Total Stk Mkt Idx Invest (2.86%), iShares Russell 2000 ETF (2.36%), Vanguard Information Technology ETF (2.24%), Global X Artfcl Intlgc & Tech ETF (1.55%).
What is Quantum Computing's short interest?
67.3M shares of Quantum Computing were sold short, 33.63% of the float; at the average daily volume it would take 9.86 days to cover.
Are insiders buying or selling Quantum Computing?
Of the latest 19 reported insider transactions in Quantum Computing (since May 19, 2025), 0 were purchases and 19 were sales.
How many shares of Quantum Computing are outstanding?
Quantum Computing has 226.3M shares outstanding, of which 200.6M are in the public float.