DATA I O CORP (DAIO)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
33
Reporting holders
$11.8M
Reported value
28.7%
Of shares outstanding
0.8%
Held as options
+5
Holder change
Institutions report 2,987,724 shares against 10,395,627 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| Kanen Wealth Management LLC | $3.3M | 839,421 | 0.80% | 21q | HELD |
| RENAISSANCE TECHNOLOGIES LLC | $1.5M | 392,443 | 0.00% | 31q | -3.7%-$59.9K |
| Penbrook Management LLC | $1.4M | 355,850 | 0.89% | 31q | HELD |
| VANGUARD CAPITAL MANAGEMENT LLC | $1.3M | 323,672 | 0.00% | 2q | +8.1%+$95.6K |
| Kovack Advisors, Inc. | $1.1M | 285,481 | 0.05% | 23q | +6.5%+$67.9K |
| DIMENSIONAL FUND ADVISORS LP | $554.3K | 140,679 | 0.00% | 31q | HELD |
| GEODE CAPITAL MANAGEMENT, LLC | $453.4K | 115,057 | 0.00% | 31q | +32.5%+$111.1K |
| CITADEL ADVISORS LLC | $342.3K | 86,869 | 0.00% | 15q | HELD |
| ESSEX INVESTMENT MANAGEMENT CO LLC | $293.8K | 74,558 | 0.04% | 14q | HELD |
| VANGUARD FIDUCIARY TRUST CO | $231.1K | 58,643 | 0.00% | 2q | +27.9%+$50.4K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $191.3K | 48,548 | 0.00% | 5q | +80.9%+$85.5K |
| Steward Partners Investment Advisory, LLC | $171.3K | 43,472 | 0.00% | 5q | HELD |
| THOMPSON DAVIS & CO., INC. | $92.7K | 23,533 | 0.06% | new | NEW |
| JAMES INVESTMENT RESEARCH, INC. | $88.3K | 22,402 | 0.01% | 31q | HELD |
| NewEdge Advisors, LLC | $88.3K | 22,402 | 0.00% | 28q | HELD |
| NORTHERN TRUST CORP | $86.0K | 21,827 | 0.00% | 31q | +62.0%+$32.9K |
| LPL Financial LLC | $82.7K | 21,000 | 0.00% | 2q | -6.9%-$6.1K |
| GROUP ONE TRADING LLC | $79.0K | 6,450 | 0.00% | 4q | +6350.0%+$77.8K |
| JANE STREET GROUP, LLC | $69.8K | 17,727 | 0.00% | new | NEW |
| Legato Capital Management LLC | $69.1K | 17,550 | 0.01% | 7q | HELD |
| BlackRock, Inc. | $67.0K | 17,015 | 0.00% | 8q | HELD |
| STATE STREET CORP | $63.7K | 16,170 | 0.00% | 15q | HELD |
| XTX Topco Ltd | $60.2K | 15,284 | 0.00% | new | NEW |
| SIMPLEX TRADING, LLC | $55.1K | 4,279 | 0.00% | new | NEW |
| CITIGROUP INC | $28.3K | 7,176 | 0.00% | new | NEW |
| Vanguard Global Advisers, LLC | $20.2K | 5,124 | 0.00% | 2q | HELD |
| UBS Group AG | $16.6K | 4,222 | 0.00% | 2q | +348.7%+$12.9K |
| Point Nemo Capital, LLC | $2.0K | 500 | 0.00% | new | NEW |
| Tower Research Capital LLC (TRC) | $1.2K | 314 | 0.00% | 20q | -81.3%-$5.4K |
| ACADIAN ASSET MANAGEMENT LLC | $427 | 108,582 | 0.00% | 31q | -12.5% |
| BARCLAYS PLC | $197 | 50 | 0.00% | new | NEW |
| HRT FINANCIAL LP | $44 | 11,288 | 0.00% | new | NEW |
| Caitong International Asset Management Co., Ltd | $16 | 4 | 0.00% | new | NEW |
| HUNTINGTON NATIONAL BANK | $4 | 1 | 0.00% | 15q | HELD |
| SBI Securities Co., Ltd. | $4 | 1 | 0.00% | 7q | HELD |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 33 | $11.8M | 2,987,724 | 8 | 9 | 3 | 0.8% |
| Q1 2026 | 28 | $7.1M | 2,745,696 | 4 | 2 | 5 | 3.8% |
| Q4 2025 | 24 | $7.6M | 1,990,288 | 2 | 7 | 6 | 16.5% |
| Q3 2025 | 24 | $10.5M | 3,055,222 | 2 | 4 | 6 | 2.5% |
| Q2 2025 | 24 | $10.2M | 3,345,731 | 3 | 9 | 4 | 0.0% |
| Q1 2025 | 25 | $7.2M | 2,916,656 | 0 | 6 | 4 | 0.3% |
| Q4 2024 | 28 | $8.3M | 2,977,458 | 4 | 2 | 6 | 0.3% |
| Q3 2024 | 27 | $7.7M | 3,005,712 | 2 | 5 | 6 | 0.0% |
| Q2 2024 | 28 | $8.6M | 3,122,264 | 3 | 4 | 9 | 0.2% |
| Q1 2024 | 27 | $9.4M | 2,667,196 | 2 | 11 | 7 | 0.1% |
| Q4 2023 | 27 | $6.3M | 2,150,171 | 3 | 7 | 8 | 0.4% |
| Q3 2023 | 25 | $10.1M | 2,650,027 | 2 | 4 | 10 | 0.1% |
| Q2 2023 | 25 | $11.1M | 2,581,169 | 1 | 9 | 3 | 0.0% |
| Q1 2023 | 23 | $12.2M | 2,450,018 | 1 | 4 | 7 | 0.1% |
| Q4 2022 | 21 | $6.4M | 1,608,377 | 8 | 3 | 3 | 0.2% |
| Q3 2022 | 24 | $8.9M | 3,204,718 | 0 | 6 | 9 | 0.0% |
| Q2 2022 | 24 | $10.3M | 3,357,503 | 0 | 8 | 6 | 0.0% |
| Q1 2022 | 25 | $14.0M | 3,306,975 | 0 | 3 | 12 | 0.0% |
| Q4 2021 | 28 | $15.0M | 3,216,116 | 0 | 11 | 8 | 1.2% |
| Q3 2021 | 33 | $23.7M | 3,582,738 | 5 | 7 | 8 | 1.4% |
| Q2 2021 | 28 | $24.7M | 3,624,388 | 4 | 11 | 8 | 0.0% |
| Q1 2021 | 27 | $18.6M | 3,423,528 | 3 | 10 | 8 | 0.0% |
| Q4 2020 | 26 | $13.7M | 3,328,215 | 4 | 2 | 7 | 0.0% |
| Q3 2020 | 22 | $10.9M | 3,419,131 | 0 | 3 | 3 | 0.0% |
| Q2 2020 | 26 | $11.5M | 3,409,862 | 2 | 5 | 7 | 0.0% |
| Q1 2020 | 25 | $8.1M | 2,717,246 | 1 | 6 | 6 | 0.0% |
| Q4 2019 | 31 | $11.8M | 2,803,766 | 1 | 8 | 10 | 0.0% |
| Q3 2019 | 31 | $10.0M | 2,563,341 | 4 | 3 | 10 | 0.0% |
| Q2 2019 | 30 | $11.8M | 2,616,249 | 1 | 7 | 10 | 0.0% |
| Q1 2019 | 41 | $16.3M | 2,930,845 | 6 | 13 | 9 | 0.0% |
| Q4 2018 | 35 | $14.7M | 2,932,315 | 1 | 0 | 1 | 0.0% |