Data I/ODAIO
13F holders, Q4 2025 (December 31)At the end of Q4 2025, 27 institutions reported holding Data I/O Corp. (DAIO) in their 13F filings, up 1 from Q3 2025. 3 opened new positions and 2 sold out. The largest holders were Kanen Wealth Management LLC ($1.7M), Renaissance Technologies ($1.4M) and Penbrook Management LLC ($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 Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 3 | $39K |
| Exits | 2 | $399K |
All 13F filers, Q3 2025 → Q4 2025: 34,754 shares bought and 270,826 shares sold, net −236,072 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 27 holders
| Kanen Wealth Management LLC | 0.53% | No change | 839,421 | $1.7M |
| Renaissance Technologies | 0.00% | Reduce -8.2% | 437,637 | $1.4M |
| Penbrook Management LLC | 0.78% | Add +1.2% | 356,850 | $1.1M |
| Vanguard Group Inc. | 0.00% | Reduce -2.3% | 350,374 | $1.1M |
| Kovack Advisors, Inc. | 0.04% | Add +2.2% | 268,906 | $852K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -31.0% | 180,249 | $571K |
| Acadian Asset Management LLC | 0.00% | Reduce -6.0% | 125,219 | $396K |
| Geode Capital Management, LLC | 0.00% | Add +2.9% | 104,582 | $332K |
| Essex Investment Management Co. LLC | 0.04% | No change | 74,641 | $237K |
| Steward Partners Investment Advisory, LLC | 0.00% | Add +24.5% | 43,472 | $138K |
| Citadel Advisors | 0.00% | Reduce -20.9% | 32,882 | $104K |
| James Investment Research, Inc. | 0.01% | No change | 22,402 | $71K |
| NewEdge Advisors, LLC | 0.00% | No change | 22,402 | $71K |
| Legato Capital Management LLC | 0.00% | No change | 17,550 | $56K |
| BlackRock, Inc. | 0.00% | No change | 17,015 | $54K |
| State Street Corp. | 0.00% | No change | 16,170 | $51K |
| Susquehanna International Group, LLP | 0.00% | Add +1.7% | 15,697 | $50K |
| Northern Trust Corp. | 0.00% | Reduce -29.5% | 13,476 | $43K |
| DRW Securities, LLC | 0.00% | New | 11,731 | $37K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +106.7% | 2,131 | $7K |
| Simplex Trading, LLC | 0.00% | Reduce -31.3% | 1,932 | $6K |
| Capital Analysts, LLC | 0.00% | New | 159 | $1K |
| Bard Associates Inc. | 0.00% | New | 100 | $317 |
| Bank of America Corp. | 0.00% | Add +2.4% | 87 | $275 |
| 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% | Add +685.7% | 110 | $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.