Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in DAIO held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Kanen Wealth Management LLC | 839K | $2.1M | 0.0% | 8.935% | 0.76% |
| 2 | RENAISSANCE TECHNOLOGIES LLC | 408K | $1.0M | -6.9% | 4.339% | 0.00% |
| 3 | Penbrook Management LLC | 357K | $903K | 0.0% | 3.798% | 0.68% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 299K | $757K | β | 3.187% | 0.00% |
| 5 | Kovack Advisors, Inc. | 268K | $635K | -0.3% | 2.853% | 0.03% |
| 6 | DIMENSIONAL FUND ADVISORS LP | 141K | $356K | -21.9% | 1.498% | 0.00% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 87K | $220K | -16.9% | 0.925% | 0.00% |
| 8 | ESSEX INVESTMENT MANAGEMENT CO LLC | 75K | $189K | 0.0% | 0.795% | 0.03% |
| 9 | VANGUARD FIDUCIARY TRUST CO | 46K | $116K | β | 0.488% | 0.00% |
| 10 | Steward Partners Investment Advisory, LLC | 43K | $110K | 0.0% | 0.463% | 0.00% |
| 11 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 27K | $68K | +71.0% | 0.286% | 0.00% |
| 12 | LPL Financial LLC | 23K | $57K | β | 0.240% | 0.00% |
| 13 | JAMES INVESTMENT RESEARCH INC | 22K | $57K | 0.0% | 0.238% | 0.01% |
| 14 | Legato Capital Management LLC | 18K | $44K | 0.0% | 0.187% | 0.00% |
| 15 | BlackRock, Inc. | 17K | $43K | 0.0% | 0.181% | 0.00% |
| 16 | STATE STREET CORP | 16K | $41K | 0.0% | 0.172% | 0.00% |
| 17 | GOLDMAN SACHS GROUP INC | 14K | $35K | β | 0.147% | 0.00% |
| 18 | NORTHERN TRUST CORP | 13K | $34K | 0.0% | 0.143% | 0.00% |
| 19 | GWM Advisors LLC | 22K | $22K | 0.0% | 0.238% | 0.00% |
| 20 | Vanguard Global Advisers, LLC | 5K | $13K | β | 0.054% | 0.00% |
| 21 | SIMPLEX TRADING, LLC | 3K | $7K | +42.8% | 0.029% | 0.00% |
| 22 | Tower Research Capital LLC (TRC) | 2K | $4K | -21.1% | 0.018% | 0.00% |
| 23 | UBS Group AG | 941 | $2K | β | 0.010% | 0.00% |
| 24 | ACADIAN ASSET MANAGEMENT LLC | 124K | $313 | -0.9% | 1.321% | 0.00% |
| 25 | BARD ASSOCIATES INC | 100 | $253 | 0.0% | 0.001% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in DAIO β a direct measure of their conviction.
Filings activity in DAIO during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new DAIO position in Q1 2026
Institutions that fully closed their DAIO position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 29 | +16% | 18.47% | +1.83 pp | $7M | +11% |
| Q4 2025 | 25 | 3.8% | 16.64% | 11.54 pp | $6M | 41% |
| Q3 2025 | 26 | 3.7% | 28.18% | +3.78 pp | $10M | +15% |
| Q2 2025 | 27 | +3.8% | 24.40% | +5.46 pp | $9M | +29% |
| Q1 2025 | 26 | 10% | 18.94% | 2.95 pp | $7M | 13% |
| Q4 2024 | 29 | 3.3% | 21.89% | +1.13 pp | $8M | +5.4% |
| Q3 2024 | 30 | 6.3% | 20.76% | 2.29 pp | $8M | 9.9% |
| Q2 2024 | 32 | β | 23.05% | β | $9M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying DAIO stock.
Based on Q1 2026 13F filings, institutional ownership of Data I/O Corporation stands at 18.5%, held across 29 reporting institutions.
Kanen Wealth Management LLC is the largest reported institutional holder of DAIO, with approximately 839,421 shares worth $0.00B as of Q1 2026.
Yes β 2 widely-followed marquee investors appear among the top 25 institutional holders of DAIO, including RENAISSANCE TECHNOLOGIES LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP.
Our composite Smart Money Score for DAIO is 71 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
7 institutions opened new positions in DAIO during Q1 2026, while 3 fully exited. 3 added to existing positions and 16 trimmed.
DAIO institutional ownership rose by 1.83 percentage points quarter-over-quarter, with a net change of +4 holders.
The top 10 institutions account for 93.8% of all reported 13F value in DAIO, and the top 25 account for 100.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Data I/O Corporation (DAIO) Institutional Ownership