CDIO
Cardio Diagnostics Holdings, Inc.
$1.99
-0.12 (-5.69%)
At close · Jul 2
Market Cap
$5.89M
Shares
2,959,469
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 16
Total Value: $538,893
Total Shares: 276,360
Institutional Ownership Trend
4 quarters
Holder Concentration
Across 16 13F filers · Δ vs Dec 31, 2025Top Holder
29.4%
−1.8 pts
Top 5
83.5%
−13.9 pts
Top 10
99.9%
−0.0 pts
HHI
1,794
Moderately concentrated−491
Quarterly Activity
vs Dec 31, 2025
New
6
Increased
3
Decreased
3
Sold Out
6
Unchanged
4
Holder count:
0
Institutional value:
+53.5%
Shares held:
+113.3%
Top Buyers
vs Dec 31, 2025| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega GEODE CAPITAL MANAGEMENT, LLC | +17,042 | 32,177 | |
| Mega UBS Group AG | +8,967 | 9,919 | |
| Mid Tower Research Capital LLC (TRC) | +1,415 | 2,192 |
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mega BlackRock, Inc. | −859 | 34,708 | |
| Mega CITIGROUP INC | −25 | 1 | |
| Mid SBI Securities Co., Ltd. | −16 | 10 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega JANE STREET GROUP, LLC | 81,283 | $158,501 | |
| Large HRT FINANCIAL LP | 62,482 | $121,839 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | 20,155 | $39,302 | |
| Large RENAISSANCE TECHNOLOGIES LLC | 15,348 | $29,928 | |
| Small Scientech Research LLC | 13,880 | $27,066 |
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mid DRW Securities, LLC | 40,463 | $109,654 | |
| Mega VANGUARD GROUP INC | 24,124 | $65,375 | |
| Mega CITADEL ADVISORS LLC | 10,858 | $29,425 | |
| Mega PNC FINANCIAL SERVICES GROUP, INC. | 1,350 | $3,658 | |
| Mega BANK OF AMERICA CORP /DE/ | 16 | $42 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Mega JANE STREET GROUP, LLC | $158,501 | 29.41% | 81,283 | Shares | Defined | 2026-05-12 | ||||
| Large HRT FINANCIAL LP | $121,839 | 22.61% | 62,482 | Shares | Defined | 2026-05-14 | ||||
| Mega BlackRock, Inc. | $67,680 | 12.56% | 34,708 | Shares | Sole | 2026-05-13 | ||||
| Mega GEODE CAPITAL MANAGEMENT, LLC | $62,744 | 11.64% | 32,177 | Shares | Defined | 2026-05-15 | ||||
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $39,302 | 7.29% | 20,155 | Shares | Defined | 2026-05-15 | ||||
| Large RENAISSANCE TECHNOLOGIES LLC | $29,928 | 5.55% | 15,348 | Shares | Sole | 2026-05-14 | ||||
| Small Scientech Research LLC | $27,066 | 5.02% | 13,880 | Shares | Sole | 2026-05-15 | ||||
| Mega UBS Group AG | $19,341 | 3.59% | 9,919 | Shares | Defined | 2026-05-05 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $7,739 | 1.44% | 3,969 | Shares | Defined | 2026-05-08 | ||||
| Mid Tower Research Capital LLC (TRC) | $4,274 | 0.79% | 2,192 | Shares | Defined | 2026-05-15 | ||||
| Mid WOLVERINE ASSET MANAGEMENT LLC | $202 | 0.04% | 104 | Shares | Defined | 2026-05-04 | ||||
| Mega MORGAN STANLEY | $195 | 0.04% | 100 | Shares | Defined | 2026-05-15 | ||||
| Large OSAIC HOLDINGS, INC. | $31 | 0.01% | 16 | Shares | Defined | 2026-05-15 | ||||
| Small SHP Wealth Management | $31 | 0.01% | 16 | Shares | Sole | 2026-05-08 | ||||
| Mid SBI Securities Co., Ltd. Broker-Dealer | $19 | 0.00% | 10 | Shares | Defined | 2026-04-28 | ||||
| Mega CITIGROUP INC | $1 | 0.00% | 1 | Shares | Defined | 2026-05-11 | ||||
| No holders match your search. | ||||||||||