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Cardio Diagnostics
CDIO

16 hedge funds and large institutions have $538K invested in Cardio Diagnostics in 2026 Q1 according to their latest regulatory filings, with 6 funds opening new positions, 3 increasing their positions, 3 reducing their positions, and 5 closing their positions.

New
Increased
Maintained
Reduced
Closed

53% more capital invested

Capital invested by funds: $351K → $538K (+$187K)

20% more first-time investments, than exits

New positions opened: 6 | Existing positions closed: 5

2.24% more ownership

Funds ownership: 7.09% → 9.34% (+2.2%)

0% more funds holding

Funds holding: 16 → 16 (0)

0% more repeat investments, than reductions

Existing positions increased: 3 | Existing positions reduced: 3

Holders
16
Holders Change
–
Holders Change %
0%
% of All Funds
0.2%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
6
Increased
3
Reduced
3
Closed
5
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Jane Street
Jane Street
New York
+$213K
2
HF
HRT Financial
New York
+$163K
3
Geode Capital Management
Geode Capital Management
Massachusetts
+$44.6K
4
Renaissance Technologies
Renaissance Technologies
New York
+$40.2K
5
SRL
Scientech Research LLC
New Jersey
+$36.3K

Top Sellers

Rank Fund Capital Flow
1
DS
DRW Securities
Illinois
-$110K
2
Citadel Advisors
Citadel Advisors
Florida
-$29.4K
3
PNC Financial Services Group
PNC Financial Services Group
Pennsylvania
-$3.66K
4
BlackRock
BlackRock
New York
-$2.25K
5
Citigroup
Citigroup
New York
-$65
Name Holding Trade Value Shares
Change 		Change in
Stake
Jane Street
1
Jane Street
New York
$159K +$213K +81,283 New
HF
2
HRT Financial
New York
$121K +$163K +62,482 New
BlackRock
3
BlackRock
New York
$67.7K -$2.25K -859 -2%
Geode Capital Management
4
Geode Capital Management
Massachusetts
$62.7K +$44.6K +17,042 +113%
VCM
5
Vanguard Capital Management
Pennsylvania
$39.3K +$52.7K +20,155 New
Renaissance Technologies
6
Renaissance Technologies
New York
$29.9K +$40.2K +15,348 New
SRL
7
Scientech Research LLC
New Jersey
$27.1K +$36.3K +13,880 New
UBS Group
8
UBS Group
Switzerland
$19.3K +$23.5K +8,967 +942%
VFT
9
Vanguard Fiduciary Trust
Pennsylvania
$7.74K +$10.4K +3,969 New
TRCT
10
Tower Research Capital (TRC)
New York
$4.27K +$3.7K +1,415 +182%
WAM
11
Wolverine Asset Management
Illinois
$203 – – –
Morgan Stanley
12
Morgan Stanley
New York
$195 – – –
Osaic Holdings
13
Osaic Holdings
Arizona
$31 – – –
SWM
14
SHP Wealth Management
Massachusetts
$31 – – –
SS
15
SBI Securities
Japan
$20 -$42 -16 -62%
Citigroup
16
Citigroup
New York
$2 -$65 -25 -96%
DS
17
DRW Securities
Illinois
– -$110K -40,463 Closed
Citadel Advisors
18
Citadel Advisors
Florida
– -$29.4K -10,858 Closed
PNC Financial Services Group
19
PNC Financial Services Group
Pennsylvania
– -$3.66K -1,350 Closed
Bank of America
20
Bank of America
North Carolina
– -$43 -16 Closed
AAP
21
Arax Advisory Partners
Colorado
– -$17 -6 Closed

CDIO Hedge Fund Activity: Q1 2026 in Review

16 of the 8,130 institutional investors tracked by Wall St. Rank reported a position in Cardio Diagnostics (CDIO) for Q1 2026, worth a combined $538K — up 53% from $351K a quarter earlier.

Buyers outnumbered sellers: 6 funds opened new CDIO positions and 5 closed out — a net gain of 1 holder — while 3 added to existing stakes and 3 trimmed.

The largest buyer was Jane Street, opening a new position worth an estimated $213K. The largest seller was DRW Securities, exiting entirely with an estimated $110K sold.

  • 16 institutional investors held Cardio Diagnostics (CDIO) as of Q1 2026, unchanged from Q4 2025.
  • Funds reported $538K of Cardio Diagnostics stock for Q1 2026, up 53% quarter-over-quarter.
  • 6 funds opened new Cardio Diagnostics positions in Q1 2026 and 5 closed out, a net change of +1 holder.
  • The largest Cardio Diagnostics buyer in Q1 2026 was Jane Street, an estimated $213K added.
  • The largest Cardio Diagnostics seller in Q1 2026 was DRW Securities, an estimated $110K sold.

Based on aggregated 13F filings for Q1 2026.