Data I/ODAIO
13F holders, Q2 2025 (June 30)At the end of Q2 2025, 26 institutions reported holding Data I/O Corp. (DAIO) in their 13F filings, unchanged from Q1 2025. 3 opened new positions and 3 sold out. The largest holders were Kanen Wealth Management LLC ($2.6M), Renaissance Technologies ($1.5M) and Vanguard Group Inc. ($1.1M). 2 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Data I/O Corp.
- CUSIP
- 237690102
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 3 | $138K |
| Exits | 3 | $40K |
All 13F filers, Q1 2025 → Q2 2025: 195,908 shares bought and 46,615 shares sold, net +149,293 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 26 holders
| Kanen Wealth Management LLC | 0.99% | No change | 839,421 | $2.6M |
| Renaissance Technologies | 0.00% | Reduce -0.7% | 476,343 | $1.5M |
| Vanguard Group Inc. | 0.00% | No change | 358,458 | $1.1M |
| Penbrook Management LLC | 0.82% | Add +29.8% | 349,750 | $1.1M |
| Kovack Advisors, Inc. | 0.08% | Reduce -4.5% | 269,431 | $835K |
| Dimensional Fund Advisors LP | 0.00% | Add +5.0% | 270,110 | $829K |
| Acadian Asset Management LLC | 0.00% | Reduce -9.1% | 133,221 | $408K |
| Bank of New York Mellon Corp | 0.00% | No change | 116,751 | $362K |
| Geode Capital Management, LLC | 0.00% | Reduce -0.1% | 97,599 | $300K |
| Essex Investment Management Co. LLC | 0.04% | Add +70.8% | 74,641 | $231K |
| Citadel Advisors | 0.00% | Add +2.8% | 42,369 | $130K |
| Susquehanna International Group, LLP | 0.00% | New | 22,708 | $70K |
| James Investment Research, Inc. | 0.01% | Add +45.5% | 22,402 | $69K |
| NewEdge Advisors, LLC | 0.00% | Add +45.5% | 22,402 | $69K |
| Bard Associates Inc. | 0.02% | Reduce -2.0% | 21,738 | $67K |
| Steward Partners Investment Advisory, LLC | 0.00% | New | 20,917 | $65K |
| Northern Trust Corp. | 0.00% | Add +14.1% | 18,277 | $57K |
| Legato Capital Management LLC | 0.01% | Add +64.4% | 17,550 | $54K |
| BlackRock, Inc. | 0.00% | No change | 17,015 | $53K |
| State Street Corp. | 0.00% | No change | 16,170 | $50K |
| Simplex Trading, LLC | 0.00% | Add +136.1% | 5,181 | $16K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -28.8% | 1,144 | $4K |
| Raymond James Financial Inc. | 0.00% | New | 1,000 | $3K |
| Bank of America Corp. | 0.00% | Add +18.6% | 83 | $258 |
| Huntington National Bank | 0.00% | No change | 1 | $3 |
| SBI Securities Co., Ltd. | 0.00% | No change | 1 | $3 |
"% of holder's portfolio" is DAIO's weight in each manager's 13F, not the share of Data I/O Corp. the manager owns.