Quantum Computing Inc. (QUBT) Institutional Ownership

Ownership Summary

Quantum Computing Inc. (NASDAQ:QUBT) is held by 291 institutional investors per 13F filings through March 2026.

• These investors collectively held 41.5% of Quantum Computing's outstanding shares in March 2026, down from 60278.5% in December 2025.
• Their total shares held in QUBT increased 17.89% quarter over quarter, and separately, investors owning Quantum Computing increased 72.19% from a year ago.
• Among the 291 funds, 157 bought more Quantum Computing shares, 76 sold down, and 58 held their ground.
• Institutional investors collectively held 92.93Mn shares in Quantum Computing as of March 2026, up by 14.1Mn shares quarter on quarter, and up 69.61Mn shares year over year.
• BlackRock, Inc. leads ownership in QUBT with 16.14Mn shares as of March 31, 2026, equal to 7.21% of outstanding shares.
• The biggest buyers of Quantum Computing for the quarter ending March 2026 included VANGUARD CAPITAL MANAGEMENT LLC (8.76Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (6.71Mn), VANGUARD FIDUCIARY TRUST CO (1.34Mn), Defiance ETFs, LLC (1.32Mn), HRT FINANCIAL LP (1.28Mn).
• The biggest sellers of Quantum Computing for the quarter ending March 2026 included Marex Group plc (3.78Mn), SUSQUEHANNA INTERNATIONAL GROUP, LLP (1.54Mn), CITADEL ADVISORS LLC (1.53Mn), Barclays Plc (1.06Mn), Ameriprise Financial Inc (1.05Mn).
• Per Business Quant data, the top 10 holders of Quantum Computing for the quarter ending March 2026 are BlackRock, Inc. (16.14Mn), VANGUARD CAPITAL MANAGEMENT LLC (8.76Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (6.71Mn), GEODE CAPITAL MANAGEMENT, LLC (4.7Mn), State Street Corp (4.52Mn), Defiance ETFs, LLC (4.5Mn), Marex Group plc (4.49Mn), Penserra Capital Management LLC (3.35Mn), Morgan Stanley (2.32Mn), MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. (2.2Mn).