Data I/ODAIO
13F holders, Q3 2025 (September 30)At the end of Q3 2025, 26 institutions reported holding Data I/O Corp. (DAIO) in their 13F filings, unchanged from Q2 2025. 2 opened new positions and 2 sold out. The largest holders were Kanen Wealth Management LLC ($2.8M), Renaissance Technologies ($1.6M) and Vanguard Group Inc. ($1.2M). 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 Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 2 | $9K |
| Exits | 2 | $70K |
All 13F filers, Q2 2025 → Q3 2025: 25,068 shares bought and 48,482 shares sold, net −23,414 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 26 holders
| Kanen Wealth Management LLC | 0.94% | No change | 839,421 | $2.8M |
| Renaissance Technologies | 0.00% | Add +0.1% | 476,834 | $1.6M |
| Vanguard Group Inc. | 0.00% | No change | 358,458 | $1.2M |
| Penbrook Management LLC | 0.82% | Add +0.9% | 352,750 | $1.2M |
| Kovack Advisors, Inc. | 0.08% | Reduce -2.3% | 263,231 | $879K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -3.3% | 261,125 | $872K |
| Acadian Asset Management LLC | 0.00% | No change | 133,221 | $444K |
| Bank of New York Mellon Corp | 0.00% | No change | 116,751 | $390K |
| Geode Capital Management, LLC | 0.00% | Add +4.1% | 101,615 | $339K |
| Essex Investment Management Co. LLC | 0.04% | No change | 74,641 | $249K |
| Citadel Advisors | 0.00% | Reduce -1.9% | 41,572 | $139K |
| Steward Partners Investment Advisory, LLC | 0.00% | Add +66.9% | 34,917 | $117K |
| James Investment Research, Inc. | 0.01% | No change | 22,402 | $75K |
| NewEdge Advisors, LLC | 0.00% | No change | 22,402 | $75K |
| Northern Trust Corp. | 0.00% | Add +4.5% | 19,106 | $64K |
| Legato Capital Management LLC | 0.01% | No change | 17,550 | $59K |
| BlackRock, Inc. | 0.00% | No change | 17,015 | $57K |
| State Street Corp. | 0.00% | No change | 16,170 | $54K |
| Susquehanna International Group, LLP | 0.00% | Reduce -32.1% | 15,428 | $52K |
| UBS Group AG | 0.00% | New | 2,716 | $9K |
| Simplex Trading, LLC | 0.00% | Reduce -45.7% | 2,812 | $9K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -9.9% | 1,031 | $3K |
| Bank of America Corp. | 0.00% | Add +2.4% | 85 | $284 |
| Huntington National Bank | 0.00% | No change | 1 | $3 |
| SBI Securities Co., Ltd. | 0.00% | No change | 1 | $3 |
| Royal Bank of Canada | 0.00% | New | 14 | $0 |
"% of holder's portfolio" is DAIO's weight in each manager's 13F, not the share of Data I/O Corp. the manager owns.