DAIO Data I/O Corporation
Data I/O Corporation (DAIO) Institutional Ownership
What the institutions did with DAIO 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.
Sign in or subscribeOwnership map
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 |
|---|---|---|
| Kanen Wealth Management LLC | 839.4K | 27.0% |
| RENAISSANCE TECHNOLOGIES LLC | 392.4K | 12.6% |
| Penbrook Management LLC | 355.9K | 11.5% |
| VANGUARD CAPITAL MANAGEMENT LLC | 323.7K | 10.4% |
| Kovack Advisors, Inc. | 285.5K | 9.2% |
| DIMENSIONAL FUND ADVISORS LP | 140.7K | 4.5% |
| GEODE CAPITAL MANAGEMENT, LLC | 115.1K | 3.7% |
| ACADIAN ASSET MANAGEMENT LLC | 108.6K | 3.5% |
| CITADEL ADVISORS LLC | 86.9K | 2.8% |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 74.6K | 2.4% |
| VANGUARD FIDUCIARY TRUST CO | 58.6K | 1.9% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 48.5K | 1.6% |
| Steward Partners Investment Advisory, LLC | 43.5K | 1.4% |
| THOMPSON DAVIS & CO., INC. | 23.5K | 0.8% |
| JAMES INVESTMENT RESEARCH, INC. | 22.4K | 0.7% |
| NewEdge Advisors, LLC | 22.4K | 0.7% |
| NORTHERN TRUST CORP | 21.8K | 0.7% |
| LPL Financial LLC | 21.0K | 0.7% |
| JANE STREET GROUP, LLC | 17.7K | 0.6% |
| Legato Capital Management LLC | 17.6K | 0.6% |
| BlackRock, Inc. | 17.0K | 0.5% |
| STATE STREET CORP | 16.2K | 0.5% |
| XTX Topco Ltd | 15.3K | 0.5% |
| HRT FINANCIAL LP | 11.3K | 0.4% |
| CITIGROUP INC | 7.2K | 0.2% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| CITADEL ADVISORS LLC | New | 0 | 86.9K | +86.9K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 86.9K | 115.1K | +28.2K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 299.4K | 323.7K | +24.3K |
| THOMPSON DAVIS & CO., INC. | New | 0 | 23.5K | +23.5K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 26.8K | 48.5K | +21.7K |
| JANE STREET GROUP, LLC | New | 0 | 17.7K | +17.7K |
| Kovack Advisors, Inc. | Increased | 268.0K | 285.5K | +17.5K |
| ACADIAN ASSET MANAGEMENT LLC | Reduced | 124.1K | 108.6K | -15.5K |
| XTX Topco Ltd | New | 0 | 15.3K | +15.3K |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 407.6K | 392.4K | -15.2K |
| GOLDMAN SACHS GROUP INC | Sold Out | 13.8K | 0 | -13.8K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 45.9K | 58.6K | +12.8K |
| HRT FINANCIAL LP | New | 0 | 11.3K | +11.3K |
| NORTHERN TRUST CORP | Increased | 13.5K | 21.8K | +8.4K |
| CITIGROUP INC | New | 0 | 7.2K | +7.2K |
| GROUP ONE TRADING LLC | Increased | 100 | 6.5K | +6.4K |
| UBS Group AG | Increased | 941 | 4.2K | +3.3K |
| LPL Financial LLC | Reduced | 22.5K | 21.0K | -1.5K |
| SIMPLEX TRADING, LLC | Increased | 2.8K | 4.3K | +1.5K |
| Tower Research Capital LLC (TRC) | Reduced | 1.7K | 314 | -1.4K |
| Penbrook Management LLC | Reduced | 356.9K | 355.9K | -1.0K |
| Point Nemo Capital, LLC | New | 0 | 500 | +500 |
| ROYAL BANK OF CANADA | Sold Out | 136 | 0 | -136 |
| BARD ASSOCIATES INC | Sold Out | 100 | 0 | -100 |
| ESSEX INVESTMENT MANAGEMENT CO LLC | Reduced | 74.6K | 74.6K | -83 |
| BARCLAYS PLC | New | 0 | 50 | +50 |
| Caitong International Asset Management Co., Ltd | New | 0 | 4 | +4 |
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.