Quick Takeaways
- DAIO - DATA I/O CORP has 14 insiders with reported activity on this page.
- Net insider value flow over the last year: +$62,279.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
Insider Transactions Reported by 14 Insiders of DATA I/O CORP
- Symbol
- DAIO on Nasdaq
- Location
- Redmond, WA
What Changed
- Buy value: $62,279; sell value: $0.
- Net share flow: +25,917.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsNet insider flow leans to buying over the last 12 months. Net value: +$62,279.
Buys
$62,279
Shares: 25,917
Insiders: 2
Sells
$0
Shares: 0
Insiders: 0
Net
+$62,279
Shares: +25,917
Insiders: 2
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 25,917 | 0 | $62,279 | $0 | +$62,279 |
DATA I/O CORP executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Anthony Ambrose | President, Director | $1,351,908 | Mixed | 01 Jun 2024 | ||
| Joel S. Hatlen | Vice President CFO COO | $774,818 | Mixed | 01 Jun 2023 | ||
| Rajeev Gulati | Vice President CTO | $481,864 | Mixed | 01 Jun 2024 | ||
| Michael R. Tidwell | VP Mktg & Corp Bus Dev | $424,111 | Mixed | 01 Jun 2024 | ||
| Charles Joesph DiBona | Vice President & CFO | $315,430 | Mixed | 01 Sep 2025 | ||
| Mark J. Gallenberger | Director | $302,364 | Mixed | 20 May 2021 | ||
| Douglas Wells Brown | Director | $252,362 | Mixed | 15 May 2025 | ||
| Gerald Yat Ng | Vice President CFO | $246,053 | Mixed | 03 Jul 2024 | ||
| Sally A. Washlow | Director | $180,174 | Mixed | 15 May 2025 | ||
| Edward J. Smith | Director | $156,525 | +$12,300 | +8.5% | Mixed | 15 May 2025 |
| Wentworth William O | President, Director | $147,195 | +$49,979 | +51% | Mixed | 03 Dec 2025 |
| Garrett Riley Larson | Director | $75,818 | Mixed | 15 May 2025 | ||
| Cheemin Bo-Linn | Director | $66,994 | Mixed | 19 May 2022 | ||
| Steven M. Waszak | Director | $22,192 | Mixed | 03 Dec 2025 |
Top shareholders of DATA I/O CORP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| Philotimo Fund, LP |
13D/G
|
Kanen David |
9.1%
|
839,421
|
$1,939,063 | $0 | 22 May 2025 | |
| Kanen Wealth Management LLC |
13F
|
Company |
8.9%
|
839,421
|
$1,732,000 | — | 31 Dec 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
13D/G
|
Company |
4.7%
from 13D/G
|
437,637
|
$1,387,309 | — | 31 Dec 2025 | |
| Anthony Ambrose |
3/4/5
|
President, Director |
—
class O/S missing
|
471,048
|
$1,351,908 | — | 01 Jun 2024 | |
| Penbrook Management LLC |
13F
|
Company |
3.8%
|
356,850
|
$1,131,215 | — | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
3.7%
|
350,374
|
$1,110,685 | — | 31 Dec 2025 | |
| Kovack Advisors, Inc. |
13F
|
Company |
2.9%
|
268,906
|
$852,432 | — | 31 Dec 2025 | |
| Joel S. Hatlen |
3/4/5
|
Vice President CFO COO |
—
class O/S missing
|
178,119
|
$774,818 | — | 01 Jun 2023 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1.9%
|
180,249
|
$571,389 | — | 31 Dec 2025 | |
| Rajeev Gulati |
3/4/5
|
Vice President CTO |
—
class O/S missing
|
167,897
|
$481,864 | — | 01 Jun 2024 | |
| Michael R. Tidwell |
3/4/5
|
VP Mktg & Corp Bus Dev |
—
class O/S missing
|
147,774
|
$424,111 | — | 01 Jun 2024 | |
| ACADIAN ASSET MANAGEMENT LLC |
13F
|
Company |
1.3%
|
125,219
|
$396,000 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.1%
|
104,582
|
$331,593 | — | 31 Dec 2025 | |
| Charles Joesph DiBona |
3/4/5
|
Vice President & CFO |
1.1%
|
100,000
|
$315,430 | — | 01 Sep 2025 | |
| Mark J. Gallenberger |
3/4/5
|
Director |
—
class O/S missing
|
69,509
|
$302,364 | — | 20 May 2021 | |
| Douglas Wells Brown |
3/4/5
|
Director |
1.1%
|
101,759
|
$252,362 | — | 15 May 2025 | |
| Gerald Yat Ng |
3/4/5
|
Vice President CFO |
—
class O/S missing
|
88,191
|
$246,053 | — | 03 Jul 2024 | |
| ESSEX INVESTMENT MANAGEMENT CO LLC |
13F
|
Company |
0.79%
|
74,641
|
$236,612 | — | 31 Dec 2025 | |
| Sally A. Washlow |
3/4/5
|
Director |
0.77%
|
72,651
|
$180,174 | — | 15 May 2025 | |
| Edward J. Smith |
3/4/5
|
Director |
0.67%
|
63,115
|
$156,525 | +$12,300 | 15 May 2025 | |
| Wentworth William O |
3/4/5
|
President, Director |
0.56%
|
52,872
|
$147,195 | +$49,979 | 03 Dec 2025 | |
| Steward Partners Investment Advisory, LLC |
13F
|
Company |
0.46%
|
43,472
|
$137,806 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.35%
|
32,882
|
$104,236 | — | 31 Dec 2025 | |
| Garrett Riley Larson |
3/4/5
|
Director |
0.33%
|
30,572
|
$75,818 | — | 15 May 2025 | |
| JAMES INVESTMENT RESEARCH, INC. |
13F
|
Company |
0.24%
|
22,402
|
$71,014 | — | 31 Dec 2025 | |
| NewEdge Advisors, LLC |
13F
|
Company |
0.24%
|
22,402
|
$71,014 | — | 31 Dec 2025 | |
| Cheemin Bo-Linn |
3/4/5
|
Director |
—
class O/S missing
|
15,401
|
$66,994 | — | 19 May 2022 | |
| Legato Capital Management LLC |
13F
|
Company |
0.19%
|
17,550
|
$55,633 | — | 31 Dec 2025 | |
| BlackRock, Inc. |
13F
|
Company |
0.18%
|
17,015
|
$53,938 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
0.17%
|
16,170
|
$51,259 | — | 31 Dec 2025 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
0.17%
|
15,697
|
$49,759 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.14%
|
13,476
|
$42,719 | — | 31 Dec 2025 | |
| DRW Securities, LLC |
13F
|
Company |
0.12%
|
11,731
|
$37,187 | — | 31 Dec 2025 | |
| Steven M. Waszak |
3/4/5
|
Director |
0.08%
|
7,950
|
$22,192 | — | 03 Dec 2025 | |
| Tower Research Capital LLC (TRC) |
13F
|
Company |
0.02%
|
2,131
|
$6,755 | — | 31 Dec 2025 | |
| SIMPLEX TRADING, LLC |
13F
|
Company |
0.02%
|
1,932
|
$6,124 | — | 31 Dec 2025 | |
| Capital Analysts, LLC |
13F
|
Company |
0%
|
159
|
$1,000 | — | 31 Dec 2025 | |
| BARD ASSOCIATES INC |
13F
|
Company |
0%
|
100
|
$317 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0%
|
87
|
$275 | — | 31 Dec 2025 | |
| HUNTINGTON NATIONAL BANK |
13F
|
Company |
0%
|
1
|
$3 | — | 31 Dec 2025 | |
| SBI Securities Co., Ltd. |
13F
|
Company |
0%
|
1
|
$3 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for DATA I/O CORP
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Wentworth William O | DAIO | Common Stock | Award | 2.08% | 1,100 | 53,972 | 03 Dec 2025 | Direct | ||
| Steven M. Waszak | DAIO | Common Stock | Award | 7,950 | 7,950 | 03 Dec 2025 | Direct | |||
| Wentworth William O | DAIO | Common Stock | Award | 16.4% | 7,455 | 52,872 | 02 Dec 2025 | Direct | ||
| Charles Joesph DiBona | DAIO | Common Stock | Award | 100,000 | 100,000 | 01 Sep 2025 | Direct | |||
| Edward J. Smith | DAIO | Common Stock | Award | 47.4% | 20,300 | 63,115 | 15 May 2025 | Direct | ||
| Garrett Riley Larson | DAIO | Common Stock | Award | 197.6% | 20,300 | 30,572 | 15 May 2025 | Direct | ||
| Douglas Wells Brown | DAIO | Common Stock | Award | 24.9% | 20,300 | 101,759 | 15 May 2025 | Direct | ||
| Sally A. Washlow | DAIO | Common Stock | Award | 38.8% | 20,300 | 72,651 | 15 May 2025 | Direct | ||
| Edward J. Smith | DAIO | Common Stock | Purchase | 13.2% | $12,300 | $2.46 | 5,000 | 42,815 | 07 May 2025 | Direct |
| Wentworth William O | DAIO | Common Stock | Purchase | 29.4% | $24,998 | $2.42 | 10,332 | 45,417 | 06 May 2025 | Direct |
| Wentworth William O | DAIO | Common Stock | Award | 43.2% | 10,585 | 35,085 | 02 May 2025 | Direct | ||
| Wentworth William O | DAIO | Common Stock | Purchase | 43.2% | $24,981 | $2.36 | 10,585 | 35,085 | 01 May 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.