Cardio Diagnostics Holdings, Inc.
CDIOW- Exchange
- Nasdaq
- Industry
- In Vitro & In Vivo Diagnostic Substances
- SEC CIK
- 0001870144
No open-market purchases or sales by Cardio Diagnostics Holdings, Inc. insiders were filed in the last 90 days; 7 institutions reported holding it in 13F filings for Q2 2026, worth $139.7K in total; no superinvestor holds it.
Other share classesCDIO
13F holders, Q3 2025
Institutional positions in Cardio Diagnostics Holdings, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 10
- +1 vs. Q2 2025
- Shares held
- 623.9K
- +121.3K (+24.1%) vs. Q2 2025
- Total value
- $254.3K
- +$29.7K (+13.2%) vs. Q2 2025
- New holders
- 1
- 1 more added
- Sold out
- 0
- 3 more reduced
1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting CDIOW on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 7 | $139.7K |
| Q1 2026 | 7 | $126.1K |
| Q4 2025 | 6 | $175.1K |
| Q3 2025 | 10 | $254.3K |
| Q2 2025 | 10 | $225.9K |
| Q1 2025 | 7 | $39.6K |
| Q4 2024 | 6 | $96.7K |
| Q3 2024 | 10 | $34.6K |
| Q2 2024 | 9 | $65.5K |
| Q1 2024 | 12 | $118.6K |
| Q4 2023 | 13 | $201.7K |
| Q3 2023 | 13 | $45.4K |
| Q2 2023 | 13 | $222.7K |
| Q1 2023 | 16 | $400.2K |
| Q4 2022 | 21 | $66.9K |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Cardio Diagnostics Holdings, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Boothbay Fund Management, LLC | 60,540 | $242.8K | 0.01% | 00.0% | Unchanged |
| Saba Capital Management, L.P. | 199,839 | $4.09K | 0.00% | 00.0% | Unchanged |
| Clear Street Group Inc. | 82,642 | $1.69K | 0.00% | +82,642 | New |
| Context Capital Management, LLC | 81,500 | $1.66K | 0.00% | 00.0% | Unchanged |
| D. E. Shaw & Co., Inc. | 74,822 | $1.53K | 0.00% | 00.0% | Unchanged |
| Atw Spac Management LLC | 60,540 | $1.24K | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 53,246 | $1.09K | 0.00% | +39,540+288.5% | Added |
| Two Sigma Securities, LLC | 10,526 | $215 | 0.00% | −35−0.3% | Reduced |
| UBS Group AG | 151 | $3 | 0.00% | −774−83.7% | Reduced |
| Toronto Dominion Bank | 100 | $2 | 0.00% | −100−50.0% | Reduced |
| Clear Street LLC | – | – | – | – | Not filed |