Data I/O Corp
DAIO- Exchange
- Nasdaq
- Industry
- Instruments For Meas & Testing of Electricity & Elec Signals
- SEC CIK
- 0000351998
No open-market purchases or sales by Data I/O Corp insiders were filed in the last 90 days; 35 institutions reported holding it in 13F filings for Q2 2026, worth $12.2M in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Data I/O Corp as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 29
- +3 vs. Q4 2025
- Shares held
- 2.87M
- +265.1K (+10.2%) vs. Q4 2025
- Total value
- $7.22M
- −$110.8K (−1.5%) vs. Q4 2025
- New holders
- 7
- 3 more added
- Sold out
- 4
- 6 more reduced
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting DAIO on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 35 | $12.2M |
| Q1 2026 | 29 | $7.22M |
| Q4 2025 | 27 | $8.44M |
| Q3 2025 | 26 | $10.7M |
| Q2 2025 | 26 | $9.93M |
| Q1 2025 | 26 | $7.51M |
| Q4 2024 | 29 | $8.69M |
| Q3 2024 | 29 | $8.14M |
| Q2 2024 | 32 | $9.06M |
| Q1 2024 | 32 | $11.8M |
| Q4 2023 | 30 | $8.39M |
| Q3 2023 | 29 | $12.8M |
| Q2 2023 | 29 | $14.4M |
| Q1 2023 | 30 | $16.2M |
| Q4 2022 | 30 | $11.1M |
| Q3 2022 | 28 | $8.94M |
| Q2 2022 | 28 | $10.3M |
| Q1 2022 | 29 | $14.0M |
| Q4 2021 | 29 | $14.8M |
| Q3 2021 | 32 | $23.4M |
| Q2 2021 | 30 | $24.7M |
| Q1 2021 | 30 | $18.6M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Data I/O Corp; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Kanen Wealth Management LLC | 839,421 | $2.12M | 0.76% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 407,643 | $1.03M | 0.00% | −29,994−6.9% | Reduced |
| Penbrook Management LLC | 356,850 | $902.8K | 0.68% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 299,397 | $757.5K | 0.00% | +299,397 | New |
| Kovack Advisors, Inc. | 267,981 | $635.1K | 0.03% | −925−0.3% | Reduced |
| Dimensional Fund Advisors LP | 140,679 | $355.9K | 0.00% | −39,570−22.0% | Reduced |
| Acadian Asset Management LLC | 124,119 | $313.0K | 0.00% | −1,100−0.9% | Reduced |
| Geode Capital Management, LLC | 86,867 | $219.8K | 0.00% | −17,715−16.9% | Reduced |
| Essex Investment Management Co LLC | 74,641 | $188.8K | 0.03% | 00.0% | Unchanged |
| Vanguard Fiduciary Trust Co | 45,853 | $116.0K | 0.00% | +45,853 | New |
| Steward Partners Investment Advisory, LLC | 43,472 | $110.0K | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 26,837 | $67.9K | 0.00% | +11,140+71.0% | Added |
| LPL Financial LLC | 22,545 | $57.0K | 0.00% | +22,545 | New |
| James Investment Research Inc | 22,402 | $56.7K | 0.01% | 00.0% | Unchanged |
| GWM Advisors LLC | 22,402 | $56.7K | 0.00% | 00.0% | Unchanged |
| Legato Capital Management LLC | 17,550 | $44.4K | 0.00% | 00.0% | Unchanged |
| BlackRock, Inc. | 17,015 | $43.0K | 0.00% | 00.0% | Unchanged |
| State Street Corp | 16,170 | $40.9K | 0.00% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 13,788 | $34.9K | 0.00% | +13,788 | New |
| Northern Trust Corp | 13,476 | $34.1K | 0.00% | 00.0% | Unchanged |
| Vanguard Global Advisers, LLC | 5,124 | $13.0K | 0.00% | +5,124 | New |
| Simplex Trading, LLC | 2,759 | $6.98K | 0.00% | +827+42.8% | Added |
| Tower Research Capital LLC (TRC) | 1,681 | $4.25K | 0.00% | −450−21.1% | Reduced |
| UBS Group AG | 941 | $2.38K | 0.00% | +941 | New |
| Bard Associates Inc | 100 | $253 | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 100 | $253 | 0.00% | +100 | New |
| Huntington National Bank | 1 | $3 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 1 | $3 | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 136 | $0 | 0.00% | +26+23.6% | Added |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −32,882−100.0% | Sold out |
| DRW Securities, LLC | 0 | $0 | 0.00% | −11,731−100.0% | Sold out |
| Capital Analysts, LLC | 0 | $0 | 0.00% | −159−100.0% | Sold out |
| Bank of America Corp | 0 | $0 | 0.00% | −87−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |