Latest Period
Q1 2026
Security Snapshot
DATA I/O CORP - Common Stock (DAIO) Institutional Ownership
CUSIP: 237690102
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
28
Shares (Excl. Options)
2,869,815
Price
$2.53
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- Security type / class
- Equity / Common Stock
- Symbol
- DAIO on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 2,869,815
- Total 13F value
- $7,216,791
- Portfolio coverage rank
- 0%
- Share change
- -85,113
- Value change
- -$243,798
- Number of holders
- 28
- Shares outstanding
- 9,391,352
- SEC-reported price per share
- $2.76
- Insider filing price
- $2.76
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- DAIO - DATA I/O CORP - Common Stock is tracked under CUSIP 237690102.
- 28 institutions reported positions in Q1 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 25 to 28 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $8,437,277 to $7,216,791.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 28 institutions filings for Q1 2026.
Security key
237690102
Latest holder period
Q1 2026
13F holders
28
13D/G owners
2
CIK / CUSIP context first
Open Q1 2026 holders
DAIO full holder history
DATA I/O CORP SEC filings
DATA I/O CORP company facts
DATA I/O CORP insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 237690102:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
DAIO
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Philotimo Fund, LP | 9.1% | $1,939,063 | 839,421 | Kanen David | 22 May 2025 | |||
| RENAISSANCE TECHNOLOGIES LLC | 4.7% | $1,321,664 | 437,637 | Renaissance Technologies LLC | 31 Dec 2025 |
As of 31 Mar 2026, 28 institutional investors reported holding 2,869,815 shares of DATA I/O CORP - Common Stock (DAIO). This represents 31% of the company’s total 9,391,352 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
31%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Kanen Wealth Management LLC | 8.9% | 839,421 | 0% | 0.76% | $2,123,735 |
| RENAISSANCE TECHNOLOGIES LLC | 4.3% | 407,643 | -6.9% | 0% | $1,031,337 |
| Penbrook Management LLC | 3.8% | 356,850 | 0% | 0.68% | $902,830 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.2% | 299,397 | 0% | 0% | $757,474 |
| Kovack Advisors, Inc. | 2.9% | 267,981 | -0.34% | 0.03% | $635,115 |
| DIMENSIONAL FUND ADVISORS LP | 1.5% | 140,679 | -22% | 0% | $355,918 |
| ACADIAN ASSET MANAGEMENT LLC | 1.3% | 124,119 | -0.88% | 0% | $313,000 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.92% | 86,867 | -17% | 0% | $219,831 |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 0.79% | 74,641 | 0% | 0.03% | $188,842 |
| VANGUARD FIDUCIARY TRUST CO | 0.49% | 45,853 | 0% | 0% | $116,008 |
| Steward Partners Investment Advisory, LLC | 0.46% | 43,472 | 0% | 0% | $109,984 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0.29% | 26,837 | +71% | 0% | $67,897 |
| LPL Financial LLC | 0.24% | 22,545 | 0% | $57,039 | |
| NewEdge Advisors, LLC | 0.24% | 22,402 | 0% | 0% | $56,677 |
| JAMES INVESTMENT RESEARCH, INC. | 0.24% | 22,402 | 0% | 0.01% | $56,677 |
| Legato Capital Management LLC | 0.19% | 17,550 | 0% | 0% | $44,401 |
| BlackRock, Inc. | 0.18% | 17,015 | 0% | 0% | $43,048 |
| STATE STREET CORP | 0.17% | 16,170 | 0% | 0% | $40,910 |
| GOLDMAN SACHS GROUP INC | 0.15% | 13,788 | 0% | $34,884 | |
| NORTHERN TRUST CORP | 0.14% | 13,476 | 0% | 0% | $34,094 |
| Vanguard Global Advisers, LLC | 0.05% | 5,124 | 0% | 0% | $12,964 |
| SIMPLEX TRADING, LLC | 0.03% | 2,759 | +43% | 0% | $6,980 |
| Tower Research Capital LLC (TRC) | 0.02% | 1,681 | -21% | 0% | $4,253 |
| UBS Group AG | 0.01% | 941 | 0% | $2,381 | |
| BARD ASSOCIATES INC | 0% | 100 | 0% | 0% | $253 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 2,869,815 | $7,216,791 | -$243,798 | $2.53 | 28 |
| 2025 Q4 | 2,954,928 | $8,437,277 | -$769,403 | $3.17 | 25 |
| 2025 Q3 | 3,191,255 | $10,670,616 | -$71,807 | $3.34 | 25 |
| 2025 Q2 | 3,214,683 | $9,925,095 | +$472,848 | $3.10 | 26 |
| 2025 Q1 | 3,065,390 | $7,508,872 | -$197,843 | $2.45 | 26 |
| 2024 Q4 | 3,137,498 | $8,689,633 | -$61,863 | $2.77 | 29 |
| 2024 Q3 | 3,165,684 | $8,135,386 | -$293,772 | $2.57 | 28 |
| 2024 Q2 | 3,283,498 | $9,061,247 | -$195,452 | $2.76 | 30 |
| 2024 Q1 | 3,353,666 | $11,803,495 | +$1,760,101 | $3.52 | 31 |
| 2023 Q4 | 2,853,608 | $8,386,497 | -$1,522,372 | $2.94 | 29 |
| 2023 Q3 | 3,366,189 | $12,823,685 | -$26,972 | $3.81 | 29 |
| 2023 Q2 | 3,354,304 | $14,389,215 | +$368,710 | $4.29 | 28 |
| 2023 Q1 | 3,287,639 | $16,343,591 | +$2,507,149 | $4.97 | 30 |
| 2022 Q4 | 2,762,237 | $10,962,571 | -$1,359,122 | $3.97 | 29 |
| 2022 Q3 | 3,204,718 | $8,940,502 | -$425,465 | $2.79 | 24 |
| 2022 Q2 | 3,357,503 | $10,305,366 | +$154,333 | $3.07 | 24 |
| 2022 Q1 | 3,306,975 | $14,049,845 | +$380,201 | $4.25 | 25 |
| 2021 Q4 | 3,216,116 | $14,823,855 | -$2,918,941 | $4.61 | 27 |
| 2021 Q3 | 3,582,648 | $23,382,000 | -$276,203 | $6.53 | 30 |
| 2021 Q2 | 3,605,835 | $24,555,000 | +$1,393,223 | $6.81 | 26 |
| 2021 Q1 | 3,423,528 | $18,553,000 | +$762,966 | $5.42 | 27 |
| 2020 Q4 | 3,328,064 | $13,712,260 | -$1,140,252 | $4.12 | 26 |
| 2020 Q3 | 3,418,500 | $10,871,561 | +$18,088 | $3.18 | 22 |
| 2020 Q2 | 3,409,662 | $11,517,112 | +$2,225,160 | $3.38 | 26 |
| 2020 Q1 | 2,502,327 | $7,030,567 | -$206,788 | $2.81 | 24 |