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, Q1 2023
Institutional positions in Cardio Diagnostics Holdings, Inc. as of Mar 31, 2023. 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
- 16
- −5 vs. Q4 2022
- Shares held
- 1.31M
- −212.8K (−13.9%) vs. Q4 2022
- Total value
- $400.2K
- +$333.3K (+498.6%) vs. Q4 2022
- New holders
- 3
- 4 more added
- Sold out
- 8
- 6 more reduced
Compare with Q4 2022: 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, Q1 2023
Shares, value and share of portfolio for each institution holding Cardio Diagnostics Holdings, Inc.; share changes are against Q4 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EHP Funds Inc. | 228,952 | $73.2K | 0.02% | −135,540−37.2% | Reduced |
| Walleye Capital LLC | 224,355 | $71.8K | 0.00% | +181,440+422.8% | Added |
| Saba Capital Management, L.P. | 199,839 | $63.9K | 0.00% | −35,758−15.2% | Reduced |
| Walleye Trading LLC | 126,199 | $40.4K | 0.00% | +102,060+422.8% | Added |
| Clear Street LLC | 87,107 | $27.9K | 0.00% | +87,107 | New |
| Context Capital Management, LLC | 81,500 | $26.0K | 0.00% | +81,500 | New |
| D. E. Shaw & Co., Inc. | 74,822 | $25.1K | 0.00% | 00.0% | Unchanged |
| Atw Spac Management LLC | 60,540 | $19.4K | 0.01% | −39,460−39.5% | Reduced |
| Rivernorth Capital Management, LLC | 49,999 | $16.0K | 0.00% | 00.0% | Unchanged |
| Yakira Capital Management, Inc. | 38,499 | $12.3K | 0.00% | −31,000−44.6% | Reduced |
| HRT Financial LP | 36,291 | $10.0K | 0.00% | +91+0.3% | Added |
| CNH Partners LLC | 17,235 | $5.51K | 0.00% | −29,207−62.9% | Reduced |
| Virtu Financial LLC | 15,469 | $5.00K | 0.00% | +15,469 | New |
| Castle Creek Arbitrage, LLC | 11,710 | $3.57K | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 622 | $199 | 0.00% | +570+1,096.2% | Added |
| Boothbay Fund Management, LLC | 60,540 | – | – | −39,460−39.5% | Reduced |
| K2 Principal Fund, L.P. | 0 | $0 | 0.00% | −92,500−100.0% | Sold out |
| Polar Asset Management Partners Inc. | 0 | $0 | 0.00% | −89,943−100.0% | Sold out |
| Shaolin Capital Management LLC | 0 | $0 | 0.00% | −47,000−100.0% | Sold out |
| Wolverine Asset Management LLC | 0 | $0 | 0.00% | −29,959−100.0% | Sold out |
| Gabelli Funds LLC | 0 | $0 | 0.00% | −26,290−100.0% | Sold out |
| Gabelli & Co Investment Advisers, Inc. | 0 | $0 | 0.00% | −22,410−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −12,483−100.0% | Sold out |
| Radcliffe Capital Management, L.P. | 0 | $0 | 0.00% | −50,000−100.0% | Sold out |