undamentalytics Newsletter
Sign in

Cardio Diagnostics Holdings, Inc.: which funds bought and sold

Institutions that bought and sold Cardio Diagnostics Holdings shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 5 institutions that filed 13F reports for both quarters added to or opened positions in Cardio Diagnostics Holdings, and 8 cut or closed them. Together they sold a net 83K shares, −30.1% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 53K shares (+344.8%); index fund managers were net buyers of 3,010 shares (+3.3%). 4 opened a new position and 3 sold out entirely.

Bought, Q2 2026 5 institutions, 4 of them new holders Sold, Q2 2026 8 institutions, 3 of them sold out
Net change, all compared −83K shares (−30.1%)
Net change, active managers +53K shares (+344.8%), 2 bought, 0 sold

Buyers versus sellers

institutions compared, 20
Active managers and hedge funds 2 bought · 0 sold · +53K
Index fund managers 1 bought · 2 sold · +3,010
Other institutions 2 bought · 6 sold · −139K

Biggest buyers

by change in shares held
Institution Change in shares Shares June 30, 2026 Value
Renaissance Technologies LLC Hedge fund +34K +220.6% 49K $107,748
Citadel Advisors LLC Hedge fund +19K New position 19K $41,765
Xtx Topco Ltd +16K New position 16K $35,244
State Street Corp Index funds +10K New position 10K $22,117
Wells Fargo & Company +2 New position 2 $4

Biggest sellers

by change in shares held
Institution Change in shares Shares June 30, 2026 Value
Jane Street Group, LLC −69K −85.3% 12K $26,133
HRT Financial LP −62K Sold out 0 —
Scientech Research LLC −14K Sold out 0 —
UBS Group AG −9,263 −93.4% 656 $1,437
Geode Capital Management, LLC Index funds −5,944 −18.5% 26K $57,449
Vanguard Fiduciary Trust Co Index funds −1,145 −28.8% 2,824 $6,185
Tower Research Capital LLC (TRC) −383 −17.5% 1,809 $3,962
Citigroup Inc −1 Sold out 0 —

New positions

largest by value
InstitutionSharesValue June 30, 2026
Citadel Advisors LLCHedge fund 19K $41,765
Xtx Topco Ltd 16K $35,244
State Street CorpIndex funds 10K $22,117
Wells Fargo & Company 2 $4

Sold out

largest by value
InstitutionSharesValue March 31, 2026
HRT Financial LP 62K $121,000
Scientech Research LLC 14K $27,066
Citigroup Inc 1 $2

Who holds the shares

13F holdings at June 30, 2026
Institutions reporting
17
Ten largest holders
99.5%
of 13F-reported shares
Index fund managers
48.7%
of 13F-reported shares
Active managers and hedge funds
35.4%
of 13F-reported shares
Buying and selling by type of institution, March 31, 2026 to June 30, 2026
TypeBoughtSoldNewSold outNet change in sharesNet %
Active managers and hedge funds 2 0 1 0 +53K +344.8%
Index fund managers 1 2 1 0 +3,010 +3.3%
Other institutions 2 6 2 3 −139K −81.9%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

← Back to Cardio Diagnostics Holdings, Inc. · Insiders · Politicians