DAIO · Insider Trading
Data I/O Corp
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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-03 | Charles Joseph DiBona | Vice President & CFO | F | −10,345 | −$29.85K |
| 2026-07-10 | Sally A. Washlow | Director | A | +16,260 | +$57.80K |
| 2026-07-10 | Edward J Smith | Director | A | +16,260 | +$57.80K |
| 2026-07-10 | Steven M Waszak | Director | A | +16,260 | +$57.80K |
| 2026-07-10 | Garrett Riley Larson | Director | A | +16,260 | +$57.80K |
| 2025-12-05 | William O. Wentworth | President | A | +1,100 | +$3.08K |
| 2025-12-05 | William O. Wentworth | President | A | +7,455 | +$20.75K |
| 2025-12-04 | Steven M Waszak | Director | A | +7,950 | +$22.19K |
| 2025-09-30 | Charles Joseph DiBona | Vice President & CFO | A | +100,000 | +$315.43K |
| 2025-05-19 | Douglas Wells Brown | Director | A | +20,300 | +$50.34K |
| 2025-05-19 | Sally A. Washlow | Director | A | +20,300 | +$50.34K |
| 2025-05-19 | Garrett Riley Larson | Director | A | +20,300 | +$50.34K |
| 2025-05-19 | Edward J Smith | Director | A | +20,300 | +$50.34K |
| 2025-05-08 | Edward J Smith | Director | Buy | +5,000 | +$12.30K |
| 2025-05-08 | William O. Wentworth | President | Buy | +10,585 | +$24.98K |
| 2025-05-07 | William O. Wentworth | President | Buy | +10,332 | +$25.00K |
| 2025-05-05 | William O. Wentworth | President | A | +10,585 | +$24.98K |
| 2025-02-12 | Gerald Yat Ng | Vice President CFO | F | −5,559 | −$15.51K |
| 2025-01-27 | Garrett Riley Larson | Director | A | +5,272 | +$15.34K |
| 2024-09-04 | William O. Wentworth | President | A | +200,000 deriv. | — |
| 2024-08-29 | Douglas Wells Brown | Director | Buy | +3,000 | +$7.98K |
| 2024-06-03 | Gerald Yat Ng | Vice President CFO | A | +18,750 | +$53.81K |
| 2024-06-03 | Michael R Tidwell | VP Mktg & Corp Bus Dev | MIXED | +6,448 | +$18.51K |
| 2024-06-03 | Rajeev Gulati | Vice President CTO | MIXED | +7,189 | +$20.63K |
| 2024-06-03 | Anthony Ambrose | President | MIXED | +12,000 | +$34.44K |
| 2024-05-21 | Michael R Tidwell | Vice President Mktg & Bus Dev | F | −2,965 | −$8.63K |
| 2024-05-21 | Rajeev Gulati | Vice President CTO | F | −2,223 | −$6.47K |
| 2024-05-21 | Anthony Ambrose | President | F | −9,978 | −$29.04K |
| 2024-05-16 | Sally A. Washlow | Director | A | +14,100 | +$41.31K |
| 2024-05-16 | Edward J Smith | Director | A | +14,100 | +$41.31K |
| 2024-05-16 | William O. Wentworth | Director | A | +14,100 | +$41.31K |
| 2024-05-16 | Douglas Wells Brown | Director | A | +14,100 | +$41.31K |
| 2024-05-15 | Anthony Ambrose | President | G | −7,500 | −$22.12K |
| 2023-07-06 | Gerald Yat Ng | Vice President Finance | A | +75,000 | +$326.63K |
| 2023-06-02 | Joel S Hatlen | Vice President CFO COO | F | −4,100 | −$17.84K |
| 2023-06-02 | Michael R Tidwell | Vice President Mktg & Bus Dev | MIXED | +16,777 | +$72.98K |
| 2023-06-02 | Anthony Ambrose | President | MIXED | +44,250 | +$192.49K |
| 2023-06-02 | Rajeev Gulati | Vice President CTO | MIXED | +16,325 | +$71.01K |
| 2023-05-26 | Anthony Ambrose | President | G | −5,000 | −$21.97K |
| 2023-05-23 | Joel S Hatlen | Vice President CFO COO | F | −2,132 | −$9.68K |
| 2023-05-23 | Rajeev Gulati | Vice President CTO | F | −1,882 | −$8.54K |
| 2023-05-23 | Anthony Ambrose | President | F | −6,300 | −$28.60K |
| 2023-05-22 | Douglas Wells Brown | Director | A | +10,400 | +$46.28K |
| 2023-05-22 | Joel S Hatlen | Vice President CFO COO | F | −3,198 | −$14.23K |
| 2023-05-22 | Edward J Smith | Director | A | +10,400 | +$46.28K |
| 2023-05-22 | Sally A. Washlow | Director | A | +10,400 | +$46.28K |
| 2023-05-22 | Michael R Tidwell | Vice President Mktg & Bus Dev | F | −2,965 | −$13.19K |
| 2023-05-22 | William O. Wentworth | Director | A | +10,400 | +$46.28K |
| 2023-05-22 | Rajeev Gulati | Vice President CTO | F | −2,823 | −$12.56K |
| 2023-05-22 | Anthony Ambrose | President | F | −9,596 | −$42.70K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Douglas Wells Brown | Director | 101,759 | $254.40K |
| Charles Joseph DiBona | Vice President & CFO | 89,655 | $224.14K |
| Sally A. Washlow | Director | 88,911 | $222.28K |
| Gerald Yat Ng | Vice President CFO | 88,191 | $220.48K |
| Edward J Smith | Director | 79,375 | $198.44K |
| William O. Wentworth | President | 52,872 | $132.18K |
| Garrett Riley Larson | Director | 46,832 | $117.08K |
| Steven M Waszak | Director | 24,210 | $60.52K |
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.
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.