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Data I/O Corporation (DAIO) institutional ownership

Latest close $2.92 Jul 30, 2026
Market cap$25M 52-week range SectorTechnology
Funds holding · Q1 2026
17
reported DAIO position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
7 buyers · 10 sellers

Data I/O Corporation (DAIO) price and institutional activity

Dates

Q1 2026

$0 bought by 7 investors
Lpl Financial LLCGoldman Sachs Group Inc +5 more
$0 sold by 10 investors
DimensionalCitadel Advisors LLC +8 more
Bought Sold Totals per quarter; hover a bar for the names.

Data I/O Corporation (DAIO) institutional activity · 17

Investor Type Est. change Change Δ Own Date
Dimensional · Reduced
Change −40K Date Q1 2026
Dimensional Reduced· Q1 2026 −40K Q1 2026
Citadel Advisors LLC Exited· Q1 2026 −33K −100.0% Q1 2026
Renaissance Technologies LLC Reduced· Q1 2026 −30K −6.9% Q1 2026
Lpl Financial LLC · New
Change +23K Date Q1 2026
Lpl Financial LLC New· Q1 2026 +23K Q1 2026
Geode · Reduced
Change −18K Date Q1 2026
Geode Reduced· Q1 2026 −18K Q1 2026
Goldman Sachs Group Inc · New
Change +14K Date Q1 2026
Goldman Sachs Group Inc New· Q1 2026 +14K Q1 2026
Drw Securities, LLC · Exited
Change −12K Δ Own −100.0% Date Q1 2026
Drw Securities, LLC Exited· Q1 2026 −12K −100.0% Q1 2026
Susquehanna International Group, LLP · Added
Change +11K Date Q1 2026
Susquehanna International Group, LLP Added· Q1 2026 +11K Q1 2026
Acadian Asset Management LLC · Reduced
Change −1K Date Q1 2026
Acadian Asset Management LLC Reduced· Q1 2026 −1K Q1 2026
UBS Group AG · New
Change +941 Date Q1 2026
UBS Group AG New· Q1 2026 +941 Q1 2026
Kovack Advisors, Inc. · Reduced
Change −925 Date Q1 2026
Kovack Advisors, Inc. Reduced· Q1 2026 −925 Q1 2026
Simplex Trading, LLC · Added
Change +827 Date Q1 2026
Simplex Trading, LLC Added· Q1 2026 +827 Q1 2026
Tower Research Capital LLC (trc) · Reduced
Change −450 Date Q1 2026
Tower Research Capital LLC (trc) Reduced· Q1 2026 −450 Q1 2026
Capital Analysts, LLC · Exited
Change −159 Δ Own −100.0% Date Q1 2026
Capital Analysts, LLC Exited· Q1 2026 −159 −100.0% Q1 2026
Group One Trading LLC · New
Change +100 Date Q1 2026
Group One Trading LLC New· Q1 2026 +100 Q1 2026
Data through Q1 2026 · filed Jun 3, 2026
15 of 17

Famous investor activity in Data I/O Corporation (DAIO)

Data I/O Corporation (DAIO) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Larson Garrett Riley · Director Grant (A) $58K
Price $3.56 Qty 16K Owned 47K ΔOwn +53.2% Trade date Jul 8, 2026 Filed date Jul 10, 2026
Larson Garrett Riley Director Grant (A) $3.56 16K $58K 47K +53.2% Jul 8, 2026 Jul 10, 2026
Smith Edward J. · Director Grant (A) $58K
Price $3.56 Qty 16K Owned 79K ΔOwn +25.8% Trade date Jul 8, 2026 Filed date Jul 10, 2026
Smith Edward J. Director Grant (A) $3.56 16K $58K 79K +25.8% Jul 8, 2026 Jul 10, 2026
Washlow Sally A. · Director Grant (A) $58K
Price $3.56 Qty 16K Owned 89K ΔOwn +22.4% Trade date Jul 8, 2026 Filed date Jul 10, 2026
Washlow Sally A. Director Grant (A) $3.56 16K $58K 89K +22.4% Jul 8, 2026 Jul 10, 2026
Waszak Steven M. · Director Grant (A) $58K
Price $3.56 Qty 16K Owned 24K ΔOwn +204.5% Trade date Jul 8, 2026 Filed date Jul 10, 2026
Waszak Steven M. Director Grant (A) $3.56 16K $58K 24K +204.5% Jul 8, 2026 Jul 10, 2026
Wentworth William O. · Director, Officer Grant (A) $3K
Price $2.80 Qty 1K Owned 54K Trade date Dec 3, 2025 Filed date Dec 5, 2025
Wentworth William O. Director, Officer Grant (A) $2.80 1K $3K 54K Dec 3, 2025 Dec 5, 2025
Waszak Steven M. · Director Grant (A) $22K
Price $2.79 Qty 8K Owned 8K Trade date Dec 3, 2025 Filed date Dec 4, 2025
Waszak Steven M. Director Grant (A) $2.79 8K $22K 8K Dec 3, 2025 Dec 4, 2025
Wentworth William O. · Director, Officer Grant (A) $21K
Price $2.78 Qty 7K Owned 53K Trade date Dec 2, 2025 Filed date Dec 5, 2025
Wentworth William O. Director, Officer Grant (A) $2.78 7K $21K 53K Dec 2, 2025 Dec 5, 2025
Dibona Charles Joseph · Officer Grant (A) $315K
Price $3.15 Qty 100K Owned 100K Trade date Sep 1, 2025 Filed date Sep 30, 2025
Dibona Charles Joseph Officer Grant (A) $3.15 100K $315K 100K Sep 1, 2025 Sep 30, 2025
8 of 8

Data I/O Corporation (DAIO) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Lytton Laurence W 1.0M
% of shares outstanding 9.9% Filing date Jun 23, 2026
Lytton Laurence W 1.0M 9.9% Jun 23, 2026
Philotimo Fund, LP 487K
% of shares outstanding 5.3% Filing date May 22, 2025
Philotimo Fund, LP 487K 5.3% May 22, 2025
Renaissance Technologies LLC 438K
% of shares outstanding 4.7% Filing date Feb 12, 2026
Renaissance Technologies LLC 438K 4.7% Feb 12, 2026
3 of 3

Data I/O Corporation (DAIO) ownership FAQ

Who owns DAIO?

17 reporting institutions disclosed DAIO position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.