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DAIO · Data I/O Corp
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DAIO Data I/o (DAIO) Insider Trading, Ownership & Congress Trades

Industrials · Instruments for meas & testing of electricity & elec signals · CIK 0000351998
Quote by TradingView
SEC filings
Insider buyers, 180 days
0
House members buying, 1 year
0
STOCK Act, US House only, disclosed up to 45 days after the trade
Funds added, last quarter
17
13F, latest reported quarter

Data I/o insider trades (Form 4)

Form 4 buys and sells (codes P and S). Grants, option exercises and conversions excluded.

No insider purchases or sales are on record for DATA I/O CORP in the period covered. Source: SEC Form 4 filings, as of 2026-10-28.

Insider
Filed
Shares
Value
Since filing
Red Oak Partners, LLC
BUY
2026-10-27 SECtraded 2026-10-20
242,934
$651.1K
n/a
Context
  • First Form 4 purchase or sale (code P or S) here by this insider on our record.
  • The trade is 100.0% of the 242,934 shares held after it.
  • No other insider bought within 30 days.
  • 17 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Insider Red Oak Partners, LLC bought about $651.1K of DAIO on Oct 20, 2026, the largest insider purchase at the company on our record; 17 funds added in the latest 13F quarter.
Red Oak Partners, LLC
BUY
2026-10-27 SECtraded 2026-10-20
130,199
$348.9K
n/a
Context
  • First Form 4 purchase or sale (code P or S) here by this insider on our record.
  • The trade is 100.0% of the 130,199 shares held after it.
  • No other insider bought within 30 days.
  • 17 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Insider Red Oak Partners, LLC bought about $348.9K of DAIO on Oct 20, 2026, the largest insider purchase at the company on our record; 17 funds added in the latest 13F quarter.
SMITH EDWARD J
Director
BUY
2025-05-08 SECtraded 2025-05-07
5,000
$12.3K
+0.8%
Context
  • First Form 4 purchase or sale (code P or S) here by this insider on our record.
  • The trade is 11.7% of the 42,815 shares held after it.
  • 1 other insider bought within 30 days.
  • 17 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director SMITH EDWARD J bought about $12.3K of DAIO on May 7, 2025; 1 other insider bought within 30 days and 17 funds added in the latest 13F quarter.
Wentworth William O.
President
BUY
2025-05-07 SECtraded 2025-05-06
10,332
$25.0K
+0.8%
Context
  • 1 earlier Form 4 trade (code P or S) here by this insider (1 buy), the last on May 1, 2025.
  • The trade is 22.7% of the 45,417 shares held after it.
  • 1 other insider bought within 30 days.
  • 17 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: President Wentworth William O. bought about $25.0K of DAIO on May 6, 2025, the largest insider purchase at the company on our record; 1 other insider bought within 30 days and 17 funds added in the latest 13F quarter.
Wentworth William O.
President
BUY
2025-05-08 SECtraded 2025-05-01
10,585
$25.0K
+0.8%
Context
  • First Form 4 purchase or sale (code P or S) here by this insider on our record.
  • The trade is 30.2% of the 35,085 shares held after it.
  • 1 other insider bought within 30 days.
  • 17 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: President Wentworth William O. bought about $25.0K of DAIO on May 1, 2025, the largest insider purchase at the company on our record; 1 other insider bought within 30 days and 17 funds added in the latest 13F quarter.
24 transactions on record
Since filing: total return from the first close after the filing to the latest close, dividend-adjusted. Not a forecast.
Context lines are counts over the filings above and returns from our own price history, never a price level. Not investment advice.
See all insider buying · insider selling
Showing the latest few. to see 19 more transactions and use the screener and CSV export. We store only your email; there is no password.
Seven facts, ranked against the sector · Rank is not a forecast
Insiders
no insider buys or sells on file
Congress
no House purchase disclosed in the last 12 months
Funds
17 funds bought in last quarter
below 86% of Industrials
Revenue
-1.2% year over year
below 71% of Industrials
Margin
-24.4% net margin
below 86% of Industrials
Buybacks
no share repurchases reported
Short interest
0.2% of the float short (float per yahoo 2026-10-26) · 1.0 days to cover · settled 2026-09-30
below 89% of Industrials
What changed in the last 30 days
Oct 27Insider Red Oak Partners, LLC bought $1,000.0K (Oct 20)

Watch DAIO

A free account keeps a watchlist and can send one email a day when insiders, funds or Congress file on the names in it. No password and no card.

The year, with the filings on it
Total return over 12 months. Each marker is a filing; hover or tap one for the detail.
-17.8%12M
-29%-6%+17%+40%2025-102025-122026-022026-042026-062026-082026-10 2026-10-20 · Red Oak Partners, LLC bought $651.1K2026-10-20 · Red Oak Partners, LLC bought $348.9K
Insider buy
Indexed to 100, dividend-adjusted, not a price chart. When a name files heavily, the largest trades are drawn first.

Who owns DAIO: institutional holders (13F)

13F holdings, latest reported quarter
Kanen Wealth Management LLC
839,421 sh
$3.3M
RENAISSANCE TECHNOLOGIES LLC
392,443 sh
$1.5M
Penbrook Management LLC
355,850 sh
$1.4M
VANGUARD CAPITAL MANAGEMENT LLC
323,672 sh
$1.3M
Kovack Advisors, Inc.
285,481 sh
$1.1M

Congress trades in DAIO

No Congress trades reported
No House member has disclosed a trade in this stock. See what Congress is buying.

Activist and 5% holders (13D/13G)

No 5%+ ownership filings
Nobody has filed for crossing 5%. That is a fact, not missing data.

DAIO planned insider sales (Form 144)

No planned-sale notices
No insider has filed to sell. Watch this after a run-up.

DAIO mutual fund holders (N-PORT)

Funds ranked by the share of their own portfolio in this stock (N-PORT).
Philotimo Focused Growth & Income
$1.3M position · as of 2026-06-30
0.9%
LVIP Dimensional U.S. Core Equity 2 Fund
$28.2K position · as of 2026-06-30
0.0%
U.S. MICRO CAP PORTFOLIO
$131.0K position · as of 2026-07-31
0.0%
U.S. SMALL CAP PORTFOLIO
$89.9K position · as of 2026-07-31
0.0%
Dimensional US Sustainability Core 1 ETF
$9.8K position · as of 2026-07-31
0.0%
VANGUARD EXTENDED MARKET INDEX FUND
$355.5K position · as of 2026-06-30
0.0%
SEC N-PORT, monthly, about 60 days late · funds ≥ $10M · % is the share of the fund's own portfolio
Executive pay vs shareholder return · William Wentworth
CEO pay, headline and as actually paid, against the company's return and its chosen peers' (DEF 14A).
FY
CEO total
Actually paid
Other execs, avg
TSR
Peer TSR
2025
$593.9K
$507.8K
$302.9K
-31%
n/a
2024
$926.8K
$520.4K
$333.6K
-39%
n/a
2023
$709.3K
$676.3K
$399.9K
-36%
n/a
2022
$634.7K
$519.0K
$336.7K
n/a
n/a
Tagged by the company under SEC Item 402(v). Returns are cumulative from the start of the disclosure period. Green where the company beat its own peer group.
Live price
Daily candles from TradingView, under their licence. No filings marked.
Why this name is on the desk
The complete filing record, in one place.
The record shows 17 funds added last quarter. Each figure is a federal filing, dated the day it went public.
Backtest this pattern Open the screener
Same sector, ranked by filing activity
Sector by SEC SIC code
AXONTMOROKPKOHOFLXXPELSYMLIIITRIWABSNASXI

DAIO financials

Revenue growth
-1.2%
XBRL, annual
Net margin
-24.4%
Ratios from the company's XBRL filings, latest filings
Revenue, TTM
$17.8M
four quarters, 2025-07-01 to 2026-06-30
Net margin, TTM
-50.1%
net income over revenue, 2025-07-01 to 2026-06-30
Free cash flow, TTM
-$7.6M
operating cash flow minus capex, 2025-07-01 to 2026-06-30
Debt to equity
n/a
no debt line filed
Cash flow to debt
n/a
no debt line filed
Return on equity
-61.2%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on assets
-36.6%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on invested capital
n/a
tax provision or pre-tax income not filed for the four quarters
Return on capital employed
-48.2%
operating income (EBIT proxy) over average of 2025-06-30 and 2026-06-30 minus current liabilities
P/E, trailing
n/a
trailing loss, a multiple of a loss is not meaningful
Enterprise value
n/a
no debt line filed
FCF yield
-29.2%
TTM free cash flow over market value at close 2026-10-26
PEG, trailing
n/a
trailing loss, a multiple of a loss is not meaningful
Price as of 2026-10-26. Hover or tap a tile for its yearly and quarterly history.
Method
TTM is four consecutive fiscal quarters; Q4 is the year minus nine months when not filed. Returns use the average of opening and closing balances. EBIT is approximated by operating income. PEG uses trailing EPS growth.
Fundamentals
Annual figures from XBRL filings. Pick a past date to see them as known then.
2025-122024-122023-122022-12
Revenue$21.5M$21.8M$28.1M$24.2M
Gross profit$10.6M$11.6M$16.2M$13.2M
Operating income-$5.1M-$3.0M$448.0K-$749.0K
Net income-$5.2M-$3.1M$486.0K-$1.1M
EPS (diluted)-0.56-0.340.05-0.13
Operating cash flow-$2.2M-$995.0K$2.4M-$1.1M
Cashn/an/an/a$11.5M
SEC XBRL, fiscal years, as known on 2026-10-28

DAIO Stock Sonar score 4/7 axes

Find similar shapesCompare

DAIO ranks highest on risk and compliance (63rd percentile) and growth (29th), and lowest on profitability (11th), among Industrials peers.

Profitability
11
Inputs
  • Return on equity-61.2% · 9 pct, sector of 198
  • Return on assets-36.6% · 13 pct, sector of 224
  • Return on invested capitaltax provision or pre-tax income not filed for the four quarters
  • Return on capital employed-48.2% · 10 pct, sector of 195
Growth
29
Inputs
  • Revenue growth, YoY-1.2% · 29 pct, sector of 254
  • Backlog growth, YoYno backlog line filed, or no year-earlier backlog
Institutional and government
14
Inputs
  • Funds adding, latest quarter17 · 14 pct, sector of 201
  • Congress net buyers, 365dno Congress trades in 365 days
  • Federal contracts, 180dno federal contracts in 180 days
  • Lobbying spend, 4 quartersno lobbying filings in the last four quarters
Risk and compliance
63
Inputs
  • Short interest, % of float+0.2% · 92 pct, sector of 269
  • Recalls per $1B revenue, 3yrevenue under $50M or not filed, so a count cannot be scaled to size
  • EPA cases per $1B revenue, 5yrevenue under $50M or not filed, so a count cannot be scaled to size
  • New text in Risk Factors, latest 10-K+16.7% · 33 pct, sector of 197
3 not measured: Financial health, Insider conviction, US patents
  • Financial health needs 1 of 2 inputs, 0 present: no debt line filed
  • Insider conviction needs 1 of 2 inputs, 0 present: no Form 4 purchase or sale (code P or S) in 180 days; no insider trades in 180 days
  • US patents needs 1 of 2 inputs, 0 present: patent data not loaded yet

4 of 7 axes scored. Each is a percentile against sector peers (all companies when the sector is thin); higher is better. An unscored axis is unmeasured, not low. How it is scored

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