Cardio Diagnostics Holdings, Inc. (CDIO) Institutional Ownership

Ownership Summary

Recent 13F filings as of December 2025 show that 15 institutional investors hold a position in Cardio Diagnostics Holdings, Inc. (NASDAQ:CDIO).

• Cardio Diagnostics Holdings saw its institutional ownership percentage rose to 6.4% in December 2025 from 5.7% in September 2025.
• The company experienced a 12.65% quarterly change in institutional shares held, alongside a decrease of 37.50% in total owners annually.
• A review of institutional activity for Cardio Diagnostics Holdings shows 5 of 15 filers increasing their positions, while 5 reduced their stake, and 5 remained unchanged.
• Collectively, institutional investors increased their stake in Cardio Diagnostics Holdings to 129.52K shares as of December 2025, a change that is up by 14.54K shares quarter on quarter and up 43.82K shares year over year.
• DRW Securities, LLC's holding of 40.46K shares as of December 31, 2025 makes it the primary institutional investor in Cardio Diagnostics Holdings, owning 1.99% of the stock.
• Among the most significant buyers of Cardio Diagnostics Holdings during December 2025 were DRW Securities, LLC (22.30K), UBS Group AG (952), GEODE CAPITAL MANAGEMENT, LLC (37), CITIGROUP INC (26), BANK OF AMERICA CORP /DE/ (1).
• Leading sellers of Cardio Diagnostics Holdings stock in December 2025 included CITADEL ADVISORS LLC (8.66K), OSAIC HOLDINGS, INC. (73), MORGAN STANLEY (23), Tower Research Capital LLC (TRC) (11), SBI Securities Co., Ltd. (1).
• The top 10 institutional holders of Cardio Diagnostics Holdings for the quarter ending December 2025 included DRW Securities, LLC (40.46K), BlackRock, Inc. (35.57K), VANGUARD GROUP INC (24.12K), GEODE CAPITAL MANAGEMENT, LLC (15.13K), CITADEL ADVISORS LLC (10.86K), PNC FINANCIAL SERVICES GROUP, INC. (1.35K), UBS Group AG (952), Tower Research Capital LLC (TRC) (777), WOLVERINE ASSET MANAGEMENT LLC (104), MORGAN STANLEY (100).