As of November 5, 2026, Data I/o Corp. is a publicly traded company (Nasdaq: DAIO); its largest reported holder is Red Oak Partners, LLC, with 11.2% on Schedule 13G of October 27, 2026, then Lytton Laurence W (9.9%) (Schedule 13G, October 27, 2026).
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Is Data I/o Corp. a real, registered company?
- Data I/O Corp files with the SEC under CIK 351998 (its SEC filings).
- Its shares are listed under the ticker DAIO on Nasdaq (SEC company record).
- Incorporated in Washington; business address in Redmond, Washington, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under DATA I/O CORP in our court records and SEC 8-K records (as of 2026-11-05).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Red Oak Partners, LLC (filed 2026-10-27).
Who are Data I/o Corp.'s owners and officers?
Data I/o Corp.: incorporated in Washington; business address in Redmond, Washington; industry Instruments For Meas & Testing of Electricity & Elec Signals (Form D, 2026-11-04).
Officers and directors, each with the role and the filing that names them:
- : Executive Officer, Director (Form D, 2026-11-04)
- : Executive Officer (Form D, 2026-11-04)
- : Director (Form D, 2026-11-04)
- : Director (Form D, 2026-11-04)
- : Director (Form D, 2026-11-04)
- : Director (Form D, 2026-11-04)
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-10-27 | Red Oak Partners, LLC | 11.2% |
| Schedule 13G, 2026-06-23 | Lytton Laurence W | 9.9% |
| Schedule 13G/A, 2026-02-12 | Renaissance Technologies LLC | 4.66% |
Questions about who owns Data I/o Corp.
Who owns Data I/o Corp.?
On this page, 2 holders' latest ownership filings report 5% or more of Data I/o Corp.: Red Oak Partners, LLC (11.2%, Schedule 13G, filed 2026-10-27) and Lytton Laurence W (9.9%, Schedule 13G, filed 2026-06-23).
Who are the largest shareholders of Data I/o Corp.?
By the share each holder's latest filing reports, the largest holders of Data I/o Corp. on this page are Red Oak Partners, LLC (11.2%) and Lytton Laurence W (9.9%).
When did Red Oak Partners, LLC buy into Data I/o Corp.?
The filings give report dates, not purchase dates. The earliest filing from Red Oak Partners, LLC on this page is the Schedule 13G, filed 2026-10-27, reporting 11.2%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 3 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Which insiders own Data I/o Corp. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , a 10% owner: 373,133 shares (3.6% of shares outstanding), held indirectly through By The Red Oak Fund, LP directly and 1 other, on a joint filing (Form 4, 2026-10-27).
- Red Oak Long Fund, LP, a 10% owner: 373,133 shares (3.6% of shares outstanding), held indirectly through By The Red Oak Fund, LP directly and 1 other, on a joint filing (Form 4, 2026-10-27).
- Red Oak Partners, LLC, a 10% owner: 373,133 shares (3.6% of shares outstanding), held indirectly through By The Red Oak Fund, LP directly and 1 other, on a joint filing (Form 4, 2026-10-27).
- Red Oak Fund, LP, a 10% owner: 373,133 shares (3.6% of shares outstanding), held indirectly through By The Red Oak Fund, LP directly and 1 other, on a joint filing (Form 4, 2026-10-27).
- , a director: 101,759 shares (0.98% of shares outstanding) (Form 4, 2025-05-19).
Shares outstanding: 10,395,627 as of 2026-07-31, from the company's latest SEC cover page.
How much has Data I/o Corp. raised?
| Filed | Sold | Offered |
|---|---|---|
| Form D, 2026-11-04 | $3M | $3M |
| Form D, 2026-11-03 | $13.25M | $13.25M |
Latest IPO step: Data I/o Corp. amended its IPO registration (S-1/A, 2026-08-11).
IPO filings: S-1/A, 2026-08-11, S-1, 2026-07-31.
Acquisitions reported on Form 8-K, Item 2.01: completed an acquisition (2026-10-22).
Keep reading
More on Data I/o Corp. and the records around it.
Data I/o Corp. elsewhere on the record
- Company profile and every filing Nov 2026
- Form D filing Nov 2026
- 5%+ stake filings Oct 2026
Companies that share a holder
- Red Oak Partners, LLC also filed stake reports on 2 other companies: Motorsport Games Inc. (Jul 2026), Global Crossing Airlines Group Inc. (Nov 2025)
- LYTTON LAURENCE W also filed stake reports on 28 other companies: Retension Pharmaceuticals, Inc. (Oct 2026), Rank One Computing Corp (Aug 2026), MDxHealth SA (Aug 2026)
- Renaissance Technologies LLC also filed stake reports on 46 other companies: AMERICAN PUBLIC EDUCATION INC (Aug 2026), Bolt Biotherapeutics, Inc. (Aug 2026), Commercial Vehicle Group, Inc. (Aug 2026)
Related pages
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