Data as of 5 Nov 2026

COMPANY RESEARCH

DATA I/O CORP

DAIO · United States · Technology

Insider Signal

Snapshot: 05 Nov 2026 · 180-day research window

Data quality under review

Insider Signal: 56.0 / 100
Reported buyers: 1
Net purchases: 1,000.0k USD
Latest disclosure: 2026-10-27

What stands out

Red Oak Fund, LP; Red Oak Long Fund, LP; Red Oak Partners, LLC; Sandberg David accounts for 100% of comparable reported purchase value; buyer breadth and value are different measures.

Price vs insider buying

DAIO · USD

● Purchase　× Sale　◇ Public disclosure　▥ 15-day cluster ·

Circles and crosses mark trade dates; diamonds below the axis mark later public disclosures. The trade became public on its disclosure date. Prices are nearest-session closes, not insider execution prices. Marker sizes are not compared when values or currencies differ.

BULL VS BEAR

Two readings of this buying

The same filings, read two ways. Each line is a fact stored for this company with the number behind it, and appears only when that number crosses a fixed threshold. Neither side is a forecast and no winner is declared.

Where the evidence comes from

The insider purchases themselvesBearone buyer only5 checked, under the threshold · 3 missing
Share price and trading2 checked, under the threshold
Short sellers2 checked, under the threshold
Company results2 missing
Company actionsno data held

Bull case · the buying is informative

Nothing held here goes beyond the fact that an insider bought.

Bear case · discount it

Only one insider bought. A single purchase can reflect that person's own finances rather than a view on the company.

Evidence still missing

No buyer here has 5 or more completed earlier purchases on record, so there is no track record to weigh.
The company's market value is not captured, so the purchases cannot be stated as a share of the business or of its trading volume.
No earnings, margin or cash-flow figures are captured for this company. The latest annual and interim reports are where to check whether the business is improving or deteriorating.
The 10b5-1 box of these Form 4 filings has not been read, so whether the purchases followed a pre-arranged plan is not known.
Form 4 states the shares held after each trade. This site reads that from the SEC's quarterly data, which is published after a quarter ends, so it does not have it yet for these filings. Whether a purchase added 1% to a personal stake or doubled it is in the filing, not on this page.

Checked and under the threshold: 9, 3 close to it

EitherNet purchases of $1000k in 180 days. Bull from $1.0M, bear when all purchases total under $25k. close to the threshold
EitherThe latest purchase is 16 days old. Bull up to 14 days, bear from 90. close to the threshold
BearThe share price changed −16% over six months (three months −20%, one month −18%) and stands 47% below its 52-week high. Counted for the bear side from a fall of 20%. close to the threshold
Either1 insider bought in the last 180 days and 0 in the 180 days before. Bull when the number at least doubles and rises by two; bear when at least two bought before and no more buy now.
BearNo insider sale is recorded in the same 180 days.
BearOver three months the share price changed −20% and the median of 84 Technology companies changed −26%: ahead by 5 points. Counted for the bear side from 20 points behind.
BearOver the last 5 trading days to 2026-11-05, 33% of this stock's off-exchange volume was sold short; over the 60 days before, 32%. The market's median is 47%. This is trading volume, not a position: a market maker who sells short and covers the same day is counted, so about half of all volume is short on an ordinary day. It is shown for comparison and counts for neither side.
BearNo insider filing in the last 180 days opened a hedge on this stock.
BearFINRA short interest on 2026-10-15 equals 1.0 days of average trading volume and 0.07% of the 10,395,627 shares outstanding, down 55% from the previous report. Counted for the bear side from 10 days, or from 10% of the shares outstanding.

Both columns arrange stored facts only. They do not change the insider score or the ranking and are not investment advice.

Who is trading?

Named filings in 180 days. Purchase values are summed only when complete and in one currency.

Role Activity

Insider

Transaction activity

Purchase value

Latest trade

Details

Red Oak Fund, LP; Red Oak Long Fund, LP; Red Oak Partners, LLC; Sandberg DavidTenPercentOwner

2 buy · 0 sell

1,000.0k USD

2026-10-20

View transactions · 2

Trade date	Disclosure	Type	Shares	Price	Currency	Reported value	Source
2026-10-20	2026-10-27	Open market purchase	242934	2.68	USD	651063.12	Source ↗
2026-10-20	2026-10-27	Open market purchase	130199	2.68	USD	348933.32	Source ↗

DiBona Charles JosephCEO / chair

0 buy · 0 sell

No purchases

2026-09-01

View transactions · 1

Trade date	Disclosure	Type	Shares	Price	Currency	Reported value	Source
2026-09-01	2026-09-03	Shares withheld for tax or exercise price	10345.0	2.89	USD	29897.050000000003	Source ↗

Larson Garrett RileyBoard member

0 buy · 0 sell

No purchases

2026-07-08

View transactions · 1

Trade date	Disclosure	Type	Shares	Price	Currency	Reported value	Source
2026-07-08	2026-07-10	Grant or award	16260.0	3.56	USD	57885.6	Source ↗

SMITH EDWARD JBoard member

0 buy · 0 sell

No purchases

2026-07-08

View transactions · 1

Trade date	Disclosure	Type	Shares	Price	Currency	Reported value	Source
2026-07-08	2026-07-10	Grant or award	16260.0	3.56	USD	57885.6	Source ↗

WASZAK STEVEN MBoard member

0 buy · 0 sell

No purchases

2026-07-08

View transactions · 1

Trade date	Disclosure	Type	Shares	Price	Currency	Reported value	Source
2026-07-08	2026-07-10	Grant or award	16260.0	3.56	USD	57885.6	Source ↗

Washlow Sally A.Board member

0 buy · 0 sell

No purchases

2026-07-08

View transactions · 1

Trade date	Disclosure	Type	Shares	Price	Currency	Reported value	Source
2026-07-08	2026-07-10	Grant or award	16260.0	3.56	USD	57885.6	Source ↗

INSIDER SIGNAL

Score breakdown：56.0 / 100

1 insiders · 1 purchase events · $1000k net purchases

US #410 · United States #410

WHY THIS SIGNAL?

Score anatomy

Each bar is that part's points in the score; the five parts add up to the score.

Number of buyers+7.0 / 35

How many different insiders bought within 15 days

Amount bought+17.4 / 25

The value bought, net of any insider sales

Buyers' roles+14.0 / 20

Lower in the company scores higher: in the backtest, purchases by the most senior insiders did worse

How recent+7.7 / 10

How long ago the latest purchase took place

Buying against selling+10.0 / 10

Lower when insiders also sold

What is holding the score back?

⚠ Few buyers · fewer than 4 different insiders
✓ Buyers' roles add a lot · the buyers are below the top of the company
✓ Recent buying · latest purchase 2026-10-20

Buyers' roles follow the US order of roles: CEOs, chairs and 10% owners score lowest.

BUYING PROFILE

1 events · 1 insiders · 180d

Cluster 0%Repeat 0%Independent 100%Large 0%

Percentages are mutually exclusive and sum to 100%.

Buying concentration

100%

Largest buyer：Red Oak Fund, LP; Red Oak Long Fund, LP; Red Oak Partners, LLC; Sandberg David · 1000k USD
Purchases counted, before sales：1000k USD

The amount at the top of the page is purchases minus sales; this one counts purchases only, in the filing currency, so the two can differ. The score counts how many people bought; this shows separately who bought the most.

This is a ranking under the current US screening rules—not a probability of gain, return forecast, or buy recommendation.

Key purchase quotes (filing currency)

Filer	Price per unit	Trade date
Red Oak Fund, LP; Red Oak Long Fund, LP; Red Oak Partners, LLC; Sandberg David	2.68 USD	Oct 20, 2026

Model details

Cluster breakdown (does not change the score)

15-day buyer breadth (count): 1 distinct reported filers
Peak time window: 2026-10-20 to 2026-10-20
Current breadth input: 0.200 (capped at 4+ buyers)
Buyer independence: Not yet measured; related-party fields are not cross-market comparable

What the filings show

🟢 Latest purchase counted
Red Oak Fund, LP; Red Oak Long Fund, LP; Red Oak Partners, LLC; Sandberg David · 1000k USD · Price 2.68 USD · Oct 20, 2026
🔴 5 other line(s) are not counted, as they are not purchases the insider chose to make; 0 have a price of zero

Filing and data quality

These checks are auditable context; they do not change the rank or score.

Identity match: REVIEW
Ticker / ISIN: Ticker or ISIN missing
Filing source links: 10 / 10
Median disclosure lag: 2 days
Latest disclosure age: 9 days at snapshot
Corrections / revisions: 0
Score-factor detail: Saved

Insider timeline

One insider bought, once (20 Oct). The share closed at 2.58 that day and at 2.37 most recently (−8.1%).

Tap an item for what it means.

●A purchase: the bigger the dot, the more was bought

Each dot is one insider's purchases on one day. The dot's area follows the amount: the largest purchase here gets the largest dot. Hold the pointer over a dot to see the date and the amount.

Blue line: this share's price, −18.6% over these six months

The closing price of each day, from 2.91 on 2026-05-11 to 2.37 on 2026-11-05. The line has no scale; read it for high and low: a dot on a low stretch was bought cheaply, a dot on a high stretch was not.

Dashed line: the typical stock on the same exchange, −9.6%

Taken from the 1610 other stocks on the same exchange that this site holds prices for. Each is measured from the first day of the window, and every day the middle one is drawn. It starts where the blue line starts, so the gap between the two is the difference: this share −18.6%, the typical one −9.6%, 8.9 points behind. It is not an index and not a comparison within one industry.

▂Grey bars: companies across United States disclosing purchases each week

A taller bar is a week in which more companies disclosed insider purchases.

This company: insiders buying per month, last 12 months

Dec

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

1Oct

Nov

Darker bars are inside the 180-day window above.

Who traded

Insider	Role	Purchases	Sales	Bought	First purchase	Share price since
Red Oak Fund, LP; Red Oak Long Fund, LP; Red Oak Partners, LLC; Sandberg David	Associated person	1	—	1,000.0k USD	2026-10-20	−8.1%

Insiders' buying price vs the latest close

Insiders paid 2.68 USD a share on average (2 purchase lines, 1 buyer, 2026-10-20 – 2026-10-20). The close on 2026-11-05 was 11.6% below that price.

Prices paid are weighted by shares and taken from the filings; dividends are not counted. Not scored.

Buying size vs market trading

Complete price and volume history is not yet available.

Market-data coverage: 0 verified sessions · Latest session: — · Ratio status: Unavailable

Traded value is estimated as close × shares traded, in major currency units. Includes disclosed qualifying purchases; disclosures may lag. Contractual or planned acquisitions are not necessarily discretionary. Ratios describe relative trading size, not market participation or score contributions.

Sector context

Technology

Buying breadth: 2.9% (22 / 759 issuers)
Sector rank: #12 / 13

This is sector-level research context. It does not affect the Insider Signal or ranking.

View US sector research →

Insider profile outcomes

Historical performance following insider filings. The company role is translated below each name while preserving the original title.

Excess return = stock return − S&P 500 ETF (SPY adjusted close) return over the same period.
Hit rate = completed events with positive excess return ÷ total completed events.
Price coverage = valid point-in-time prices ÷ events mature enough for that period.
Returns start on the first shared trading session on or after publication.
Small-sample rule: n<5 is shown for transparency and is not scored.

Events are disclosure-level observations; related disclosures published on the same date may share a return path and may not be statistically independent. This research enrichment does not affect the insider score or ranking.

Red Oak Partners, LLCTenPercentOwner

First purchase in 12M

2/7

Large purchase ≥ $100k

5/8

Cluster buying · 15D

1/8

Buying the dip · ≥20% below prior 52W high

Not classifiable

Routine / opportunistic

Not classifiable

Wentworth William O.President

First purchase in 12M

0/1

Large purchase ≥ $100k

0/2

Cluster buying · 15D

1/2

Buying the dip · ≥20% below prior 52W high

Not classifiable

Routine / opportunistic

Not classifiable

Red Oak Fund, LPTenPercentOwner

First purchase in 12M

1/1

Large purchase ≥ $100k

1/1

Cluster buying · 15D

1/1

Buying the dip · ≥20% below prior 52W high

Not classifiable

Routine / opportunistic

Not classifiable

Signal outcomes

Calculated from immutable US ranking snapshots; excess return is stock return minus SPY return. Newly saved snapshots remain pending until each forward horizon matures. This never affects the US score.

Horizon	Status	Result
5D	Awaiting maturity	—
20D	Awaiting maturity	—
60D	Awaiting maturity	—
120D	Awaiting maturity	—

Market context

PRICE PERFORMANCE

-18.3%

-20.5%

-16.3%

12M

-21.3%

VOLATILITY & LIQUIDITY

Volatility: 49.9%
Beta: —
Avg daily volume: $71,878.0
20-session drawdown: -19.2%
60-session drawdown: -27.0%
Latest volume / prior median: 3.4×

VALUATION

Market cap: —
P/E: —

FUNDAMENTALS

Revenue: $21.5M
Net income: $-5.2M
Operating profit: $-5.1M
Equity: $13.5M
Cash: $7.9M
Debt: —
Operating cash flow: $-2.2M
Free cash flow: $-2.8M
Profit margin: —
ROE: —
Industry: —

Prices to 05 Nov 2026: price cache (yfinance). From OpenBB/yfinance, captured 01 Oct 2026: Revenue, Net income, Equity, Operating profit, Cash, Operating cash flow, Free cash flow. It does not affect the insider score or rank.

Dividends

No cash dividend in the last five years.

Yahoo Finance: cash dividends by ex-dividend date, the latest close, the payout ratio (dividends ÷ 12-month earnings per share) and announced dates; special dividends included, stock dividends and splits not. Not part of any score.

Insiders and institutions

Insiders, ranking window: $1,000.0k net bought · buyers: 1 · last 2026-10-20

Holders of more than 5% (SEC Schedules 13D and 13G)

Holder	Of the class	Schedule	As of	Change
Red Oak Partners, LLC	11.20%	13G	2026-10-20	—
LYTTON LAURENCE W	9.90%	13G	2026-06-17	—
Kanen David	9.10%	13G	2025-05-22 · over a year ago	—

Filings in the last 12 months

2 new · 0 raised · 0 cut · 1 fell to 5% or less

As of	Holder	Schedule	Stake	What happened
2026-10-20	Red Oak Partners, LLC	13G	— → 11.20%	new holding
2026-06-17	LYTTON LAURENCE W	13G	— → 9.90%	new holding
2025-12-31	Renaissance Technologies LLC	13G	— → 4.66%	5% or less

Source: SEC, Schedules 13D and 13G, filed in a structured format since 18 December 2024; earlier filings are not read, so a holder that has not filed since then is not shown. 13D: the holder may seek to influence the company (activists, founders, strategic holders); it must amend within two business days of a change of 1% or more. 13G: the holder states it holds passively; it amends within 45 days after the quarter in which its holding changed materially, so a figure can be months old. The percentage is the filer's own, of the class of shares it names. Context only; not part of the score.

Institutional managers (SEC Form 13F)

Held on 2026-06-30: $11.7M35 managers · 3.1M shares · 29.9% of the shares outstanding (SEC cover page, 2026-07-31)
Shares held, change on the quarter: +8.3%since 2026-03-31
Change on the year: −10.8%since 2025-06-30
Managers: 9 new · 9 added · 6 cut · 3 sold out

13F managers held more shares at the quarter end than a quarter earlier.

Source: SEC Form 13F, filed within 45 days of each quarter end by managers with $100 million or more in US-listed shares; long positions only (no short positions, options left out). Late filers of the quarter are not counted. A parent and a subsidiary can both report the same shares, so the total can count some twice. The quarter end (2026-06-30) and the insiders' purchases (last 2026-10-20) are different periods. Context only; not part of the score.

Regulatory filings

Insider filing announcement · published 2026-10-27 · trade date 2026-10-20
Insider filing announcement · published 2026-09-03 · trade date 2026-09-01
Insider filing announcement · published 2026-07-10 · trade date 2026-07-08

Unfold all 9 filings

Insider filing announcement · published 2026-10-27 · trade date 2026-10-20
Insider filing announcement · published 2026-09-03 · trade date 2026-09-01
Insider filing announcement · published 2026-07-10 · trade date 2026-07-08
Insider filing announcement · published 2026-07-10 · trade date 2026-07-08
Insider filing announcement · published 2026-07-10 · trade date 2026-07-08
Insider filing announcement · published 2026-07-10 · trade date 2026-07-08
Insider filing announcement · published 2025-12-05 · trade date 2025-12-03
Insider filing announcement · published 2025-12-05 · trade date 2025-12-02
Insider filing announcement · published 2025-12-04 · trade date 2025-12-03

Results and insider purchases

Results (8-K)	Bought within 5 sessions	Bought within 20 sessions
2026-08-1216:39 ET · after the closeFirst session 2026-08-13	None	None
2026-07-3017:04 ET · after the closeFirst session 2026-07-31	None	None
2026-05-1516:45 ET · after the closeFirst session 2026-05-18	None	None
2026-02-2717:17 ET · after the closeFirst session 2026-03-02	None	None

Results dates are the company's 8-K filings to the SEC under Item 2.02 (results of operations); one filed after the close counts from the next session. Purchases are open-market buys reported on Form 4 (code P), by trade date; a Form 4 can arrive two business days after the trade, so the latest days can still fill in. Facts only; this does not change the score or rank.

Ownership and trading-plan context

Direct / indirect ownership	Indirect
10b5-1 filing evidence	Not declared in filing field
Evidence retrieved	2026-10-28T23:57:43+00:00

These are accession-level filing fields. Unavailable means the evidence was not fetched or parsed; it is never inferred as “No” and does not adjust the US score.

Filing evidence

These are underlying national-feed records from the 365-day window ending on the saved ranking snapshot. The score uses only the latest 180 days; older qualifying equity purchases remain visible for audit but do not enter the current score. The original filer, role, transaction classification, instrument, price, volume, value and source fields are retained. The first three rows are shown; remaining records can be unfolded for audit. Other transaction types are retained but excluded from the score.

Excluded transactions & classification

1 qualifying purchase disclosure(s) · 2 transaction line(s)

Trade Oct 20, 2026Open market purchase

Red Oak Fund, LP; Red Oak Long Fund, LP; Red Oak Partners, LLC; Sandberg David · TenPercentOwner

Published Oct 27, 2026 · Common Stock · 242934 shares × 2.68 USD · 651063.12 USD

Open filing

Trade Oct 20, 2026Open market purchase

Red Oak Fund, LP; Red Oak Long Fund, LP; Red Oak Partners, LLC; Sandberg David · TenPercentOwner

Published Oct 27, 2026 · Common Stock · 130199 shares × 2.68 USD · 348933.32 USD

Open filing

Showing 2 of 2 matching raw-feed row(s) from the current 365-day research window. Prices and reported values remain in the filing currency and its major unit (for example, UK pence are parsed as GBP). The screen-level $ aggregate is separately FX-normalised for research ranking, not a trade-date conversion.

Other disclosed transactions · excluded from score

View 8 other transaction(s)

Trade Dec 3, 2025Grant or award

Wentworth William O. · President

Published Dec 5, 2025 · Common Stock · 1100.0 shares × 2.8 USD · 3080.0 USD

Open filing

Trade Dec 3, 2025Grant or award

WASZAK STEVEN M · Director

Published Dec 4, 2025 · Common Stock · 7950.0 shares × 2.79 USD · 22180.5 USD

Open filing

Trade Dec 2, 2025Grant or award

Wentworth William O. · President

Published Dec 5, 2025 · Common Stock · 7455.0 shares × 2.78 USD · 20724.899999999998 USD

Open filing

Unfold all 5 remaining filing row(s)

Transaction date	Published	Filer	Role	Transaction	Instrument	Price (local currency)	Quote currency	Volume	Reported value (local currency)	Source
2026-09-01	2026-09-03	DiBona Charles Joseph	Vice President & CFO	Shares withheld for tax or exercise price	Common Stock	2.89 USD	USD	10345.0	29897.050000000003 USD	Open filing
2026-07-08	2026-07-10	Larson Garrett Riley	Director	Grant or award	Common Stock	3.56 USD	USD	16260.0	57885.6 USD	Open filing
2026-07-08	2026-07-10	SMITH EDWARD J	Director	Grant or award	Common Stock	3.56 USD	USD	16260.0	57885.6 USD	Open filing
2026-07-08	2026-07-10	Washlow Sally A.	Director	Grant or award	Common Stock	3.56 USD	USD	16260.0	57885.6 USD	Open filing
2026-07-08	2026-07-10	WASZAK STEVEN M	Director	Grant or award	Common Stock	3.56 USD	USD	16260.0	57885.6 USD	Open filing

Showing 8 of 8 matching raw-feed row(s) from the current 365-day research window. Prices and reported values remain in the filing currency and its major unit (for example, UK pence are parsed as GBP). The screen-level $ aggregate is separately FX-normalised for research ranking, not a trade-date conversion.

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Model & Sources

Signal history

56.0 / 100

Latest recorded score

↓ -1.0 ptssince the first recorded snapshot on 2026-10-28; 8 calendar days observed

Recorded snapshots: 5
First snapshot: 2026-10-28

There is not yet a 30-calendar-day comparison; earlier scores are not reconstructed. These are raw signal scores saved when each full scoring run completed. They describe changes in research ranking, not price performance or returns.

Why did it change?

Less than 30 days of comparable history is available, so factor movement is not yet decomposed.

Signal score history

Fixed 0–100 scale; dates are spaced by calendar time.

Recent recorded points

Oct 28, 202657.0
Oct 29, 202656.9
Nov 3, 202656.3
Nov 4, 202656.2
Nov 5, 202656.0

View all recorded scores

Snapshot date	Signal score
2026-10-28	57.0
2026-10-29	56.9
2026-11-03	56.3
2026-11-04	56.2
2026-11-05	56.0

Why this score? · Model details

Priority = 100 × Σ(fixed weight × 0–1 rule-based input)

Factor	Weight	This company input	Point contribution
15-day buyer breadth (count)	35%	0.200	7.0
Qualified-buy size	25%	0.694	17.4
Role informativeness (inverted)	20%	0.700	14.0
Recency	10%	0.766	7.7
Buy/sell conviction	10%	1.000	10.0

This is a heuristic ordering under the current rules, not a calibrated return forecast. It explains why candidates rank differently; the public-filing evidence and data limits are shown below.

Snapshot & identity

Snapshot date: 2026-11-05
Ticker: DAIO
ISIN: —
Sector: Technology
Industry: —

Company logos by Parqet

How to read Form 4 transaction codes

Code	Interpretation	Screen treatment
P	Open-market / private purchase	Buy evidence when the security is qualifying equity
S	Sale	Sell evidence when the security is qualifying equity
A	Grant / award	Context only
F	Tax-related withholding	Context only
M	Option exercise	Context only
G	Gift	Context only
J / L	Other / non-directional	Context only

P/S rows for options, warrants, compensation units and debt remain visible for audit but are excluded from equity scores and quotes.