Quantum Computing Inc. (QUBT) Institutional Ownership

Ownership Summary

According to SEC filings for the period ending September 2025, Quantum Computing Inc. (NASDAQ:QUBT) is held by 257 institutional firms.

• Quantum Computing saw its institutional ownership percentage fell to 42.0% in September 2025 from 55.4% in June 2025.
• Quarterly data indicates a 80.28% shift in institutional share volume, and the annual owner count reflects an increase of 634.29%.
• Of these 257 institutional investors, 180 increased their holdings in Quantum Computing, while 48 of them reduced positions, and 29 investors maintained their exposure.
• Collectively, institutional investors increased their stake in Quantum Computing to 100.07Mn shares as of September 2025, a change that is up by 44.56Mn shares quarter on quarter and up 96.07Mn shares year over year.
• With 12.20Mn shares, VANGUARD GROUP INC commands the largest institutional position in Quantum Computing as of September 30, 2025, equating to 5.12% of the company.
• Among the most significant buyers of Quantum Computing during September 2025 were Alyeska Investment Group, L.P. (6.72Mn), CITADEL ADVISORS LLC (6.41Mn), Ghisallo Capital Management LLC (4.03Mn), Polar Asset Management Partners Inc. (3.81Mn), Tidal Investments LLC (3.77Mn).
• Leading sellers of Quantum Computing stock in September 2025 included MIRAE ASSET SECURITIES (USA) INC. (1.07Mn), BANK OF AMERICA CORP /DE/ (757.72K), Invesco Ltd. (756.73K), AMERIPRISE FINANCIAL INC (595.12K), FIRST TRUST ADVISORS LP (540.29K).
• The top 10 institutional holders of Quantum Computing for the quarter ending September 2025 included VANGUARD GROUP INC (12.20Mn), BlackRock, Inc. (10.44Mn), Alyeska Investment Group, L.P. (6.72Mn), JANE STREET GROUP, LLC (6.70Mn), CITADEL ADVISORS LLC (6.41Mn), Anson Funds Management LP (5.37Mn), Polar Asset Management Partners Inc. (5.37Mn), Ghisallo Capital Management LLC (4.03Mn), Tidal Investments LLC (3.77Mn), GEODE CAPITAL MANAGEMENT, LLC (3.14Mn).