CDIO CARDIO DIAG HLD
CARDIO DIAG HLD (CDIO) Institutional Ownership
What the institutions did with CDIO last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC | 49.2K | 25.5% |
| BlackRock, Inc. | 34.7K | 18.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 26.2K | 13.6% |
| VANGUARD CAPITAL MANAGEMENT LLC | 20.2K | 10.4% |
| CITADEL ADVISORS LLC | 19.1K | 9.9% |
| XTX Topco Ltd | 16.1K | 8.3% |
| JANE STREET GROUP, LLC | 11.9K | 6.2% |
| STATE STREET CORP | 10.1K | 5.2% |
| VANGUARD FIDUCIARY TRUST CO | 2.8K | 1.5% |
| Tower Research Capital LLC (TRC) | 1.8K | 0.9% |
| UBS Group AG | 656 | 0.3% |
| WOLVERINE ASSET MANAGEMENT LLC | 104 | 0.1% |
| MORGAN STANLEY | 100 | 0.1% |
| OSAIC HOLDINGS, INC. | 16 | 0.0% |
| SHP Wealth Management | 16 | 0.0% |
| SBI Securities Co., Ltd. | 10 | 0.0% |
| WELLS FARGO & COMPANY/MN | 2 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| JANE STREET GROUP, LLC | Reduced | 81.3K | 11.9K | -69.4K |
| HRT FINANCIAL LP | Sold Out | 62.5K | 0 | -62.5K |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 15.3K | 49.2K | +33.9K |
| CITADEL ADVISORS LLC | New | 0 | 19.1K | +19.1K |
| XTX Topco Ltd | New | 0 | 16.1K | +16.1K |
| Scientech Research LLC | Sold Out | 13.9K | 0 | -13.9K |
| STATE STREET CORP | New | 0 | 10.1K | +10.1K |
| UBS Group AG | Reduced | 9.9K | 656 | -9.3K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 32.2K | 26.2K | -5.9K |
| VANGUARD FIDUCIARY TRUST CO | Reduced | 4.0K | 2.8K | -1.1K |
| Tower Research Capital LLC (TRC) | Reduced | 2.2K | 1.8K | -383 |
| WELLS FARGO & COMPANY/MN | New | 0 | 2 | +2 |
| CITIGROUP INC | Sold Out | 1 | 0 | -1 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.