Cardio Diagnostics
CDIO
16 hedge funds and large institutions have $351K invested in Cardio Diagnostics in 2025 Q4 according to their latest regulatory filings, with 3 funds opening new positions, 3 increasing their positions, 5 reducing their positions, and 1 closing their positions.
200% more first-time investments, than exits
New positions opened: 3 | Existing positions closed: 1
14% more funds holding
Funds holding: 14 → 16 (+2)
0.57% more ownership
Funds ownership: 6.53% → 7.09% (+0.57%)
24% less capital invested
Capital invested by funds: $462K → $351K (-$111K)
40% less repeat investments, than reductions
Existing positions increased: 3 | Existing positions reduced: 5
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
DS
DRW Securities
Chicago,
Illinois
|
+$81.1K |
| 2 |
UBS Group
Zurich,
Switzerland
|
+$3.46K |
| 3 |
Geode Capital Management
Boston,
Massachusetts
|
+$135 |
| 4 |
Citigroup
New York
|
+$95 |
| 5 |
Bank of America
Charlotte,
North Carolina
|
+$4 |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
-$31.5K |
| 2 |
Osaic Holdings
Scottsdale,
Arizona
|
-$265 |
| 3 |
Morgan Stanley
New York
|
-$84 |
| 4 |
TRCT
Tower Research Capital (TRC)
New York
|
-$40 |
| 5 |
SS
SBI Securities
Tokyo,
Japan
|
-$4 |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
DS
1
DRW Securities
Chicago,
Illinois
| $110K | +$81.1K | +22,298 | +123% |
|
2
BlackRock
New York
| $96.4K | – | – | – |
|
3
Vanguard Group
Malvern,
Pennsylvania
| $65.4K | – | – | – |
|
|
4
Geode Capital Management
Boston,
Massachusetts
| $41K | +$135 | +37 | +0.2% |
|
|
5
Citadel Advisors
Miami,
Florida
| $29.4K | -$31.5K | -8,662 | -44% |
|
6
PNC Financial Services Group
Pittsburgh,
Pennsylvania
| $3.66K | – | – | – |
|
|
7
UBS Group
Zurich,
Switzerland
| $2.58K | +$3.46K | +952 | New |
|
|
TRCT
8
Tower Research Capital (TRC)
New York
| $2.11K | -$40 | -11 | -1% |
|
|
WAM
9
Wolverine Asset Management
Chicago,
Illinois
| $282 | – | – | – |
|
|
10
Morgan Stanley
New York
| $271 | -$84 | -23 | -19% |
|
|
SS
11
SBI Securities
Tokyo,
Japan
| $70 | -$4 | -1 | -4% |
|
|
12
Citigroup
New York
| $70 | +$95 | +26 | New |
|
|
13
Osaic Holdings
Scottsdale,
Arizona
| $43 | -$265 | -73 | -82% |
|
|
14
Bank of America
Charlotte,
North Carolina
| $43 | +$4 | +1 | +7% |
|
|
SWM
15
SHP Wealth Management
Plymouth,
Massachusetts
| $43 | +$58 | +16 | New |
|
|
AAP
16
Arax Advisory Partners
Denver,
Colorado
| $17 | – | – | – |
|
CDIO Hedge Fund Activity: Q4 2025 in Review
16 of the 8,238 institutional investors tracked by Wall St. Rank reported a position in Cardio Diagnostics (CDIO) for Q4 2025, worth a combined $351K — down 24% from $462K a quarter earlier.
Buyers outnumbered sellers: 3 funds opened new CDIO positions and 1 closed out — a net gain of 2 holders — while 3 added to existing stakes and 5 trimmed.
The largest buyer was DRW Securities, adding an estimated $81.1K. The largest seller was Citadel Advisors, cutting an estimated $31.5K.
- 16 institutional investors held Cardio Diagnostics (CDIO) as of Q4 2025, up from 14 in Q3 2025.
- Funds reported $351K of Cardio Diagnostics stock for Q4 2025, down 24% quarter-over-quarter.
- 3 funds opened new Cardio Diagnostics positions in Q4 2025 and 1 closed out, a net change of +2 holders.
- The largest Cardio Diagnostics buyer in Q4 2025 was DRW Securities, an estimated $81.1K added.
- The largest Cardio Diagnostics seller in Q4 2025 was Citadel Advisors, an estimated $31.5K sold.
Based on aggregated 13F filings for Q4 2025.