Quantum Computing Inc. (QUBT) Institutional Ownership

Ownership Summary

Quantum Computing Inc. (NASDAQ:QUBT) showed up in the 13F filings of 283 institutional investors as of December 2025.

• They owned 58.9% of outstanding stock in December 2025, up from 56.5% the prior quarter.
• They increased total shares held in QUBT by 35.86% quarter over quarter, and investors in Quantum Computing increased 128.23% from a year ago.
• Of these 283 holders, 214 added to their stakes in Quantum Computing, 46 trimmed positions, and 23 made no changes.
• 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.
• As of December 31, 2025, BlackRock, Inc. held the largest stake in Quantum Computing with 16.14Mn shares, accounting for 9.67% of total shares outstanding.
• Leading buyers of Quantum Computing shares for the quarter ending December 2025 were 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 largest sales of QUBT for the quarter ending December 2025 came from 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 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).