CDIO · Cardio Diagnostics Holdings, Inc. · Shareholders & Ownership
Every disclosed holder of CDIO in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns CDIO
13F quarter Jun 30, 2026| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 718,912 | 24.29% |
| Insiders (Forms 3, 4, 5) | 0 | 0.00% |
| 13D/G-only blocks | 0 | 0.00% |
| Remaining | 2,240,557 | 75.71% |
| Registered funds (N-PORT, not summed) | 42,719 | 1.44% |
Shares outstanding: 2,959,469, the issuer's latest cover-page count restated onto today's split basis.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of CDIO
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
Saba Capital Management, L.P.
13F
CIK 1510281 · Registered investment adviser · Jun 30, 2026
|
199,839 | ||
| 2 |
Clear Street Group Inc.
13F
CIK 1881567 · Unknown · Jun 30, 2026
|
82,342 | ||
| 3 |
Context Capital Management, LLC
13F
CIK 1301396 · Registered investment adviser · Jun 30, 2026
|
81,500 | ||
| 4 |
D. E. Shaw & Co., Inc.
13F
CIK 1009207 · Unknown · Jun 30, 2026
|
74,822 | ||
| 5 |
BOOTHBAY FUND MANAGEMENT, LLC
13F
CIK 1549230 · Registered investment adviser · Jun 30, 2026
|
60,540 | ||
| 6 |
RENAISSANCE TECHNOLOGIES LLC
13F
CIK 1037389 · Registered investment adviser · Jun 30, 2026
|
49,200 | ||
| 7 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
|
34,708 | ||
| 8 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
|
26,233 | ||
| 9 |
Virtu Financial LLC
13F
CIK 1533964 · Unknown · Jun 30, 2026
|
21,279 | ||
| 10 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
|
20,155 | ||
| 11 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
20,155 | ||
| 12 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
|
19,071 | ||
| 13 |
Fidelity Extended Market Index Fund
Fund
S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
17,089 | ||
| 14 |
XTX Topco Ltd
13F
CIK 1828301 · Unknown · Jun 30, 2026
|
16,093 | ||
| 15 |
JANE STREET GROUP, LLC
13F
CIK 1595888 · Unknown · Jun 30, 2026
|
11,933 | ||
| 16 |
STATE STREET CORP
13F
CIK 93751 · Bank · Jun 30, 2026
|
10,099 | ||
| 17 |
|
6,217 | ||
| 18 |
Fidelity Series Total Market Index Fund
Fund
S000065248 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
2,826 | ||
| 19 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
|
2,824 | ||
| 20 |
Fidelity Total Market Index Fund
Fund
S000006026 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
2,251 | ||
| 21 |
Tower Research Capital LLC (TRC)
13F
CIK 1533421 · Unknown · Jun 30, 2026
|
1,809 | ||
| 22 |
Fidelity Nasdaq Composite Index Fund
Fund
S000055366 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
398 | ||
| 23 |
WOLVERINE ASSET MANAGEMENT LLC
13F
CIK 1279891 · Registered investment adviser · Jun 30, 2026
|
104 | ||
| 24 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
|
100 | ||
| 25 |
OSAIC HOLDINGS, INC.
13F
CIK 1677044 · Holding company · Jun 30, 2026
|
16 | ||
| 26 |
SHP Wealth Management
13F
CIK 1807060 · Registered investment adviser · Jun 30, 2026
|
16 | ||
| 27 |
SBI Securities Co., Ltd.
13F
CIK 1851815 · Non-US institution · Jun 30, 2026
|
10 | ||
| 28 |
WELLS FARGO & COMPANY/MN
13F
CIK 72971 · Bank · Jun 30, 2026
|
2 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.