ASP Isotopes ASPI Institutional Ownership

Updated Oct 11, 2026

ASP Isotopes Inc. (NASDAQ:ASPI) appeared in the 13F filings of 186 institutional investors for the quarter ended June 30, 2026.

• These investors held 50.27% of outstanding shares in Q2 2026, down from 50.31% the quarter before.
• Total holdings of ASP Isotopes shares rose 3.30% from Q1 2026, and the number of holders rose 46.46% from Q2 2025.
• Of the 186 holders of ASPI in Q2 2026, 113 added to their positions, 53 reduced their stakes and 20 left their positions unchanged.
• Institutional investors held 65.43Mn shares of ASP Isotopes in total at the end of Q2 2026, up 2.09Mn from the prior quarter and up 24.51Mn from a year earlier.
• As of June 30, 2026, the biggest holder of ASP Isotopes was BlackRock, Inc. with 9.22Mn shares, or 7.08% of shares outstanding.
• Among holders that already owned ASP Isotopes, the biggest buyers in Q2 2026 were BlackRock, Inc. (+889.05K shares), Philadelphia Financial Management of San Francisco, LLC (+694.67K shares), BNP Paribas Asset Management Holding S.A. (+689.77K shares), Bank of America Corp (+540.06K shares) and UBS Group AG (+405.92K shares).
• The biggest cuts to ASPI positions during Q2 2026 came from Jane Street Group, LLC (-663.38K shares), AWM Investment Company, Inc. (-543.01K shares), Diametric Capital, LP (-414.99K shares), Morgan Stanley (-414.09K shares) and Citadel Advisors LLC (-410.42K shares).
• ASP Isotopes' 10 largest institutional shareholders as of Q2 2026 were BlackRock, Inc. (9.22Mn shares), Encompass Capital Advisors LLC (6.56Mn shares), Vanguard Capital Management LLC (4.98Mn shares), Rovida Investment Management Ltd (4.1Mn shares), UBS Group AG (3.25Mn shares), Geode Capital Management, LLC (2.95Mn shares), Alyeska Investment Group, L.P. (2.84Mn shares), State Street Corp (2.6Mn shares), Exchange Traded Concepts, LLC (2.26Mn shares) and AWM Investment Company, Inc. (1.58Mn shares), per Business Quant data.