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 |
|---|---|---|---|---|---|
| Royal Bank of Canada | 136 | $0 | 0.00% | +26+23.6% | Added |
| Huntington National Bank | 1 | $3 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 1 | $3 | 0.00% | 00.0% | Unchanged |
| Bard Associates Inc | 100 | $253 | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 100 | $253 | 0.00% | +100 | New |
| UBS Group AG | 941 | $2.38K | 0.00% | +941 | New |
| Tower Research Capital LLC (TRC) | 1,681 | $4.25K | 0.00% | −450−21.1% | Reduced |
| Simplex Trading, LLC | 2,759 | $6.98K | 0.00% | +827+42.8% | Added |
| Vanguard Global Advisers, LLC | 5,124 | $13.0K | 0.00% | +5,124 | New |
| Northern Trust Corp | 13,476 | $34.1K | 0.00% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 13,788 | $34.9K | 0.00% | +13,788 | New |
| State Street Corp | 16,170 | $40.9K | 0.00% | 00.0% | Unchanged |
| BlackRock, Inc. | 17,015 | $43.0K | 0.00% | 00.0% | Unchanged |
| Legato Capital Management LLC | 17,550 | $44.4K | 0.00% | 00.0% | Unchanged |
| 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 |
| LPL Financial LLC | 22,545 | $57.0K | 0.00% | +22,545 | New |
| Susquehanna International Group, LLP | 26,837 | $67.9K | 0.00% | +11,140+71.0% | Added |
| Steward Partners Investment Advisory, LLC | 43,472 | $110.0K | 0.00% | 00.0% | Unchanged |
| Vanguard Fiduciary Trust Co | 45,853 | $116.0K | 0.00% | +45,853 | New |
| Essex Investment Management Co LLC | 74,641 | $188.8K | 0.03% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 86,867 | $219.8K | 0.00% | −17,715−16.9% | Reduced |
| Acadian Asset Management LLC | 124,119 | $313.0K | 0.00% | −1,100−0.9% | Reduced |
| Dimensional Fund Advisors LP | 140,679 | $355.9K | 0.00% | −39,570−22.0% | Reduced |
| Kovack Advisors, Inc. | 267,981 | $635.1K | 0.03% | −925−0.3% | Reduced |
| Vanguard Capital Management LLC | 299,397 | $757.5K | 0.00% | +299,397 | New |
| Penbrook Management LLC | 356,850 | $902.8K | 0.68% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 407,643 | $1.03M | 0.00% | −29,994−6.9% | Reduced |
| Kanen Wealth Management LLC | 839,421 | $2.12M | 0.76% | 00.0% | Unchanged |
| 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 |