Data I/O Corp
DAIO- Exchange
- Nasdaq
- Industry
- Instruments For Meas & Testing of Electricity & Elec Signals
- SEC CIK
- 0000351998
In the last 90 days, Data I/O Corp insiders filed 1 open-market purchase and 0 sales; 35 institutions reported holding it in 13F filings for Q2 2026, worth $12.2M in total; no superinvestor holds it.
Holders of 5% or more of DAIO
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Data I/O Corp, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Red Oak Partners, LLC | 13G | 11.20%1.49M shares | New | Oct 27, 20261 filing | Oct 27, 2026 | SEC |
| Lytton Laurence W | 13G | 9.90%1.03M shares | New | Jun 23, 20261 filing | Jun 23, 2026 | SEC |
| Philotimo Fund, LP | 13G/A | 9.10%839.4K shares | – | Nov 16, 20216 filings | May 22, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
15 Schedule 13D and 13G filings on Data I/O Corp, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Oct 27, 20264:30 PM ET | Red Oak Partners, LLCand 3 others | 13G | 11.20%1.49M shares | New | Oct 20, 2026 | SEC |
| Jun 23, 20265:01 PM ET | Lytton Laurence Wand 2 others | 13G | 9.90%1.03M shares | New | Jun 17, 2026 | SEC |
| Feb 12, 20262:12 PM ET | Renaissance Technologies LLCand 1 other | 13G/A | 4.66%437.6K shares | –Below 5% | Dec 31, 2025 | SEC |
| May 22, 20255:02 PM ET | Philotimo Fund, LPand 3 others | 13G/A | 9.10%839.4K shares | – | May 22, 2025 | SEC |
| Feb 13, 2024 | Renaissance Technologies LLC | 13G/AOld format | – | – | – | SEC |
| Jan 5, 2024 | Philotimo Fund, LP | 13GOld format | – | – | – | SEC |
| Dec 5, 2023 | Philotimo Fund, LP | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2023 | Renaissance Technologies LLC | 13G/AOld format | – | – | – | SEC |
| Jan 11, 2023 | Philotimo Fund, LP | 13G/AOld format | – | – | – | SEC |
| Dec 13, 2022 | Philotimo Fund, LP | 13G/AOld format | – | – | – | SEC |
| Feb 11, 2022 | Renaissance Technologies LLC | 13G/AOld format | – | – | – | SEC |
| Nov 16, 2021 | Philotimo Fund, LP | 13GOld format | – | New | – | SEC |
| Feb 12, 2021 | Select Equity Group, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 12, 2021 | Dimensional Fund Advisors LP | 13G/AOld format | – | – | – | SEC |
| Feb 11, 2021 | Renaissance Technologies LLC | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Data I/O Corp shares.
No Form 144 notices for Data I/O Corp are on file.