SEC Form 4 · Updated Daily

DAIO

DATA I/O CORPORATION Ownership

Insider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.

FinancialsOwnership

Current Reporting Owners

OwnerRoleShares OwnedAs OfLast Activity
Ambrose AnthonyDirector · Officer471,0482024-06-01A
HATLEN JOEL SOfficer178,1192023-06-01F
Gulati RajeevOfficer167,8972024-06-01A
Tidwell Michael ROfficer147,7742024-06-01A
Brown Douglas WellsDirector101,7592025-05-15A
DiBona Charles JosephOfficer89,6552026-09-01F
Washlow Sally A.Director88,9112026-07-08A
Ng Gerald YatOfficer88,1912024-07-03F
SMITH EDWARD JDirector79,3752026-07-08A
Wentworth William O.Director53,9722025-12-03A
Larson Garrett RileyDirector46,8322026-07-08A
WASZAK STEVEN MDirector24,2102026-07-08A

Recent Filings

DateOwnerActivitySharesPriceOwned After
2026-09-01DiBona Charles JosephTax withholding10,345$2.8889,655
2026-07-08WASZAK STEVEN MGrant / award16,260$3.5624,210
2026-07-08Washlow Sally A.Grant / award16,260$3.5688,911
2026-07-08SMITH EDWARD JGrant / award16,260$3.5679,375
2026-07-08Larson Garrett RileyGrant / award16,260$3.5646,832
2025-12-03WASZAK STEVEN MGrant / award7,950$2.797,950
2025-12-03Wentworth William O.Grant / award1,100$2.8053,972
2025-12-02Wentworth William O.Grant / award7,455$2.7852,872
2025-09-01DiBona Charles JosephGrant / award100,000$3.15100,000
2025-05-15Washlow Sally A.Grant / award20,300$2.4872,651
2025-05-15Brown Douglas WellsGrant / award20,300$2.48101,759
2025-05-15Larson Garrett RileyGrant / award20,300$2.4830,572
2025-05-15SMITH EDWARD JGrant / award20,300$2.4863,115
2025-05-07SMITH EDWARD JOpen-market buy5,000$2.4642,815
2025-05-06Wentworth William O.Open-market buy10,332$2.4245,417
2025-05-02Wentworth William O.Grant / award10,585$2.3635,085
2025-05-01Wentworth William O.Open-market buy10,585$2.3635,085
2025-01-23Larson Garrett RileyGrant / award5,272$2.915,272
2024-09-03Wentworth William O.Grant / award (derivative)200,000$2.39200,000
2024-08-26Brown Douglas WellsOpen-market buy3,000$2.6681,459
2024-07-03Ng Gerald YatTax withholding5,559$2.7988,191
2024-06-01Ambrose AnthonyGrant / award37,500$2.87471,048
2024-06-01Ambrose AnthonyTax withholding8,870$2.87433,548
2024-06-01Ambrose AnthonyTax withholding9,978$2.87442,418
2024-06-01Ambrose AnthonyTax withholding6,652$2.87452,396
2024-06-01Ng Gerald YatGrant / award18,750$2.8793,750
2024-06-01Tidwell Michael RGrant / award12,500$2.87147,774
2024-06-01Tidwell Michael RTax withholding1,976$2.87135,274
2024-06-01Tidwell Michael RTax withholding1,853$2.87137,250
2024-06-01Tidwell Michael RTax withholding2,223$2.87139,103
2024-06-01Gulati RajeevGrant / award12,500$2.87167,897
2024-06-01Gulati RajeevTax withholding1,976$2.87155,397
2024-06-01Gulati RajeevTax withholding1,853$2.87157,373
2024-06-01Gulati RajeevTax withholding1,482$2.87159,226
2024-05-18Tidwell Michael RTax withholding2,965$2.91141,326
2024-05-18Gulati RajeevTax withholding2,223$2.91160,708
2024-05-18Ambrose AnthonyTax withholding9,978$2.91459,058
2024-05-16Washlow Sally A.Grant / award14,100$2.9352,351
2024-05-16Brown Douglas WellsGrant / award14,100$2.9378,459
2024-05-16SMITH EDWARD JGrant / award14,100$2.9337,815

Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.