DAIO (Data I/O Corp)
Insider Trading Activity
Every open-market purchase and sale reported by DAIO officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-03 | Charles Joseph DiBona | Vice President & CFO | F | — | — |
| 2026-07-10 | Sally A. Washlow | Director | A | — | — |
| 2026-07-10 | EDWARD J SMITH | Director | A | — | — |
| 2026-07-10 | STEVEN M WASZAK | Director | A | — | — |
| 2026-07-10 | Garrett Riley Larson | Director | A | — | — |
| 2025-12-05 | William O. Wentworth | President | A | — | — |
| 2025-12-05 | William O. Wentworth | President | A | — | — |
| 2025-12-04 | STEVEN M WASZAK | Director | A | — | — |
| 2025-09-30 | Charles Joseph DiBona | Vice President & CFO | A | — | — |
| 2025-05-19 | Douglas Wells Brown | Director | A | — | — |
| 2025-05-19 | Sally A. Washlow | Director | A | — | — |
| 2025-05-19 | Garrett Riley Larson | Director | A | — | — |
| 2025-05-19 | EDWARD J SMITH | Director | A | — | — |
| 2025-05-08 | EDWARD J SMITH | Director | Buy | — | — |
| 2025-05-08 | William O. Wentworth | President | Buy | — | — |
| 2025-05-07 | William O. Wentworth | President | Buy | — | — |
| 2025-05-05 | William O. Wentworth | President | A | — | — |
| 2025-02-12 | Gerald Yat Ng | Vice President CFO | F | — | — |
| 2025-01-27 | Garrett Riley Larson | Director | A | — | — |
| 2024-09-04 | William O. Wentworth | President | A | — | — |
| 2024-08-29 | Douglas Wells Brown | Director | Buy | — | — |
| 2024-06-03 | Gerald Yat Ng | Vice President CFO | A | — | — |
| 2024-06-03 | Michael R Tidwell | VP Mktg & Corp Bus Dev | MIXED | — | — |
| 2024-06-03 | Rajeev Gulati | Vice President CTO | MIXED | — | — |
| 2024-06-03 | Anthony Ambrose | President | MIXED | — | — |
| 2024-05-21 | Michael R Tidwell | Vice President Mktg & Bus Dev | F | — | — |
| 2024-05-21 | Rajeev Gulati | Vice President CTO | F | — | — |
| 2024-05-21 | Anthony Ambrose | President | F | — | — |
| 2024-05-16 | Sally A. Washlow | Director | A | — | — |
| 2024-05-16 | EDWARD J SMITH | Director | A | — | — |
| 2024-05-16 | William O. Wentworth | Director | A | — | — |
| 2024-05-16 | Douglas Wells Brown | Director | A | — | — |
| 2024-05-15 | Anthony Ambrose | President | G | — | — |
| 2023-07-06 | Gerald Yat Ng | Vice President Finance | A | — | — |
| 2023-06-02 | JOEL S HATLEN | Vice President CFO COO | F | — | — |
| 2023-06-02 | Michael R Tidwell | Vice President Mktg & Bus Dev | MIXED | — | — |
| 2023-06-02 | Anthony Ambrose | President | MIXED | — | — |
| 2023-06-02 | Rajeev Gulati | Vice President CTO | MIXED | — | — |
| 2023-05-26 | Anthony Ambrose | President | G | — | — |
| 2023-05-23 | JOEL S HATLEN | Vice President CFO COO | F | — | — |
| 2023-05-23 | Rajeev Gulati | Vice President CTO | F | — | — |
| 2023-05-23 | Anthony Ambrose | President | F | — | — |
| 2023-05-22 | Douglas Wells Brown | Director | A | — | — |
| 2023-05-22 | JOEL S HATLEN | Vice President CFO COO | F | — | — |
| 2023-05-22 | EDWARD J SMITH | Director | A | — | — |
| 2023-05-22 | Sally A. Washlow | Director | A | — | — |
| 2023-05-22 | Michael R Tidwell | Vice President Mktg & Bus Dev | F | — | — |
| 2023-05-22 | William O. Wentworth | Director | A | — | — |
| 2023-05-22 | Rajeev Gulati | Vice President CTO | F | — | — |
| 2023-05-22 | Anthony Ambrose | President | F | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 1,020,312 | — |
| — | Director | 744,814 | — |
| — | President | 471,048 | — |
| — | President | 185,864 | — |
| — | Vice President CFO COO | 182,897 | — |
| — | Vice President CTO | 155,397 | — |
| — | VP Mktg & Corp Bus Dev | 147,774 | — |
| — | Director | 101,759 | — |
| — | Vice President & CFO | 89,655 | — |
| — | Director | 88,911 | — |
| — | Vice President CFO | 88,191 | — |
| — | Director | 79,375 | — |
| — | Director | 69,509 | — |
| — | Director | 69,461 | — |
| — | Director | 65,832 | — |
| — | President | 52,872 | — |
| — | Director | 50,556 | — |
| — | Director | 46,832 | — |
| — | Director | 34,200 | — |
| — | Vice President World Wide Sale | 24,889 | — |
| — | Director | 24,210 | — |
| — | Director | 21,876 | — |
| — | Vice President Operations | 19,241 | — |
| — | Director | 18,516 | — |
| — | Director | 17,400 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the DAIO quote page; the site-wide leaderboard is on the insider transactions hub.