CHICAGO, IL
CARDIO DIAGNOSTICS HOLDINGS, INC.CDIO— Latest position per institution from SEC 13F filings
15
Institutional holders
1.63M
Total shares held
611.79K
Estimated value
81.43K
Avg. position size
WALLEYE CAPITAL LLC
CIK 1758720
Shares
234.91K
Value
9.14K
Filed
Sep 30, 2024
EHP FUNDS INC.
CIK 1927881
Shares
228.95K
Value
24.36K
Filed
Mar 31, 2024
SABA CAPITAL MANAGEMENT, L.P.
CIK 1510281
Shares
199.84K
Value
3K
Filed
Jun 30, 2026
WALLEYE TRADING LLC
CIK 1388391
Shares
132.26K
Value
5.14K
Filed
Sep 30, 2024
CLEAR STREET LLC
CIK 1708828
Shares
82.74K
Value
1.34K
Filed
Jun 30, 2025
CLEAR STREET GROUP INC.
CIK 1881567
Shares
82.34K
Value
1.50K
Filed
Jun 30, 2026
CONTEXT CAPITAL MANAGEMENT, LLC
CIK 1301396
Shares
81.50K
Value
1.22K
Filed
Jun 30, 2026
D. E. SHAW & CO., INC.
CIK 1009207
Shares
74.82K
Value
1.36K
Filed
Jun 30, 2026
HRT FINANCIAL LP
CIK 1475597
Shares
62.48K
Value
121.00
Filed
Mar 31, 2026
ATW SPAC MANAGEMENT LLC
CIK 1878495
Shares
60.54K
Value
1.24K
Filed
Sep 30, 2025
BOOTHBAY FUND MANAGEMENT, LLC
CIK 1549230
Shares
60.54K
Value
132.58K
Filed
Jun 30, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 1446194
Shares
53.25K
Value
1.09K
Filed
Sep 30, 2025
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
49.20K
Value
107.75K
Filed
Jun 30, 2026
DRW SECURITIES, LLC
CIK 1481986
Shares
40.46K
Value
109.65K
Filed
Dec 31, 2025
RIVERNORTH CAPITAL MANAGEMENT, LLC
CIK 1447578
Shares
39.83K
Value
6.77K
Filed
Dec 31, 2023
YAKIRA CAPITAL MANAGEMENT, INC.
CIK 1584639
Shares
38.50K
Value
6.69K
Filed
Dec 31, 2023
BLACKROCK, INC.
CIK 2012383
Shares
34.71K
Value
76.01K
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
26.23K
Value
57.45K
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
24.12K
Value
65.38K
Filed
Dec 31, 2025
VIRTU FINANCIAL LLC
CIK 1533964
Shares
21.28K
Value
0.00
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | WALLEYE CAPITAL LLC | 1758720 | 234.91K | 9.14K | Sep 30, 2024 |
| 2 | EHP FUNDS INC. | 1927881 | 228.95K | 24.36K | Mar 31, 2024 |
| 3 | SABA CAPITAL MANAGEMENT, L.P. | 1510281 | 199.84K | 3K | Jun 30, 2026 |
| 4 | WALLEYE TRADING LLC | 1388391 | 132.26K | 5.14K | Sep 30, 2024 |
| 5 | CLEAR STREET LLC | 1708828 | 82.74K | 1.34K | Jun 30, 2025 |
| 6 | CLEAR STREET GROUP INC. | 1881567 | 82.34K | 1.50K | Jun 30, 2026 |
| 7 | CONTEXT CAPITAL MANAGEMENT, LLC | 1301396 | 81.50K | 1.22K | Jun 30, 2026 |
| 8 | D. E. SHAW & CO., INC. | 1009207 | 74.82K | 1.36K | Jun 30, 2026 |
| 9 | HRT FINANCIAL LP | 1475597 | 62.48K | 121.00 | Mar 31, 2026 |
| 10 | ATW SPAC MANAGEMENT LLC | 1878495 | 60.54K | 1.24K | Sep 30, 2025 |
| 11 | BOOTHBAY FUND MANAGEMENT, LLC | 1549230 | 60.54K | 132.58K | Jun 30, 2026 |
| 12 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1446194 | 53.25K | 1.09K | Sep 30, 2025 |
| 13 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 49.20K | 107.75K | Jun 30, 2026 |
| 14 | DRW SECURITIES, LLC | 1481986 | 40.46K | 109.65K | Dec 31, 2025 |
| 15 | RIVERNORTH CAPITAL MANAGEMENT, LLC | 1447578 | 39.83K | 6.77K | Dec 31, 2023 |
| 16 | YAKIRA CAPITAL MANAGEMENT, INC. | 1584639 | 38.50K | 6.69K | Dec 31, 2023 |
| 17 | BLACKROCK, INC. | 2012383 | 34.71K | 76.01K | Jun 30, 2026 |
| 18 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 26.23K | 57.45K | Jun 30, 2026 |
| 19 | VANGUARD GROUP INC | 102909 | 24.12K | 65.38K | Dec 31, 2025 |
| 20 | VIRTU FINANCIAL LLC | 1533964 | 21.28K | 0.00 | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.