Quantum Computing Inc. (QUBT) Institutional Ownership

Ownership Summary

Quantum Computing Inc. (NASDAQ:QUBT) has 283 institutional investors that have filed 13F reports for the period ending December 2025.

• These investors collectively held 58.9% of Quantum Computing's outstanding shares in December 2025, up from 56.5% in September 2025.
• They increased total shares held in Quantum Computing by 35.86% from the prior quarter, while the number of investors in QUBT increased 128.23% year over year.
• Among the 283 funds, 214 bought more Quantum Computing shares, 46 sold down, and 23 held their ground.
• In total, institutional investors held 98.28Mn shares in Quantum Computing as of December 2025, up by 25.94Mn shares quarter on quarter, and up 75.31Mn shares year over year.
• BlackRock, Inc. is the top holder of Quantum Computing as of December 31, 2025, with 16.14Mn shares representing 9.67% of outstanding stock.
• The biggest buyers of Quantum Computing for the quarter ending December 2025 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 December 2025 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).
• According to Business Quant data, leading holders of QUBT for December 2025 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).