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Public ownership evidence

Data I/O Corp (DAIO) Ownership Disclosures

Read DAIO insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

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2026-10-272026-10-20Red Oak Fund, LP, Red Oak Long Fund, LP, Red Oak Partners, LLC, Sandberg DavidP130,199Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-10-20 and its public availability date is 2026-10-27. Subtracting those calendar dates gives 7 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code P: a purchase. A purchase code is only one eligibility check. Confirm reporting-owner role, amendment lineage and coverage before treating it as a strategy input.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC 0001325533-26-000012 ↗SEC 0001325533-26-000012 ↗SEC 0001325533-26-000012 ↗

Recent Form 4 activity

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2026-10-272026-10-20Red Oak Fund, LP, Red Oak Long Fund, LP, Red Oak Partners, LLC, Sandberg DavidP130,199Not reported
2026-10-272026-10-20Red Oak Fund, LP, Red Oak Long Fund, LP, Red Oak Partners, LLC, Sandberg DavidPNot reported$1,046,808
2026-10-272026-10-20Red Oak Fund, LP, Red Oak Long Fund, LP, Red Oak Partners, LLC, Sandberg DavidP242,934Not reported
2026-10-272026-10-20Red Oak Fund, LP, Red Oak Long Fund, LP, Red Oak Partners, LLC, Sandberg DavidPNot reported$1,953,192.04

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 25 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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XTX Topco Ltd2026-06-302026-08-1515,284$60,219None
JANE STREET GROUP, LLC2026-06-302026-08-152,496$9,834None
JANE STREET GROUP, LLC2026-06-302026-08-1515,231$60,010None
HRT FINANCIAL LP2026-06-302026-08-1511,288$44,000None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1548,548$191,279None
CITADEL ADVISORS LLC2026-06-302026-08-1586,869$342,264None
GROUP ONE TRADING LLC2026-06-302026-08-156,450$25,413None
BARCLAYS PLC2026-06-302026-08-1550$197None
VANGUARD CAPITAL MANAGEMENT LLC2026-06-302026-08-14323,672$1,275,268None
Vanguard Global Advisers, LLC2026-06-302026-08-145,124$20,189None
Steward Partners Investment Advisory, LLC2026-06-302026-08-1443,472$171,280None
Kanen Wealth Management LLC2026-06-302026-08-14839,421$3,287,675None
UBS Group AG2026-06-302026-08-144,222$16,635None
ACADIAN ASSET MANAGEMENT LLC2026-06-302026-08-14108,582$427,000None
RENAISSANCE TECHNOLOGIES LLC2026-06-302026-08-14392,443$1,546,225None
VANGUARD FIDUCIARY TRUST CO2026-06-302026-08-1458,643$231,053None
NORTHERN TRUST CORP2026-06-302026-08-1421,827$85,998None
HUNTINGTON NATIONAL BANK2026-06-302026-08-141$4None
SIMPLEX TRADING, LLC2026-06-302026-08-134,279$16,859None
GEODE CAPITAL MANAGEMENT, LLC2026-06-302026-08-1315,451$60,876None
GEODE CAPITAL MANAGEMENT, LLC2026-06-302026-08-1399,606$392,544None
NewEdge Advisors, LLC2026-06-302026-08-1322,402$88,264None
Tower Research Capital LLC (TRC)2026-06-302026-08-12314$1,237None
DIMENSIONAL FUND ADVISORS LP2026-06-302026-08-123,073$12,108None
DIMENSIONAL FUND ADVISORS LP2026-06-302026-08-12137,606$542,168None

90-day public filing window, up to 50 source positions.

XTX Topco Ltd ↗JANE STREET GROUP, LLC ↗JANE STREET GROUP, LLC ↗HRT FINANCIAL LP ↗SUSQUEHANNA INTERNATIONAL GROUP, LLP ↗CITADEL ADVISORS LLC ↗GROUP ONE TRADING LLC ↗BARCLAYS PLC ↗VANGUARD CAPITAL MANAGEMENT LLC ↗Vanguard Global Advisers, LLC ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.