Data I/O Corp (DAIO) Institutional Ownership

Ownership Summary

Data I/O Corp (NASDAQ:DAIO) currently has 25 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

• Data I saw its institutional ownership percentage fell to 22.8% in December 2025 from 34.8% in September 2025.
• Institutional share ownership changed by -5.28% QoQ, while the number of institutional owners saw a decrease of 13.79% YoY.
• The latest 13F cycle for Data I reveals that of 25 total investors, 11 funds grew their exposure, whereas 7 reduced theirs and 7 made no changes.
• The aggregate institutional position in Data I now stands at 2.09Mn shares as of December 2025, after investors decreased their holdings (down by 116.61K shares quarter on quarter which is down 1.03Mn shares year over year).
• With 437.64K shares, RENAISSANCE TECHNOLOGIES LLC commands the largest institutional position in Data I as of December 31, 2025, equating to 4.77% of the company.
• Among the most significant buyers of Data I during December 2025 were DRW Securities, LLC (11.73K), Steward Partners Investment Advisory, LLC (8.55K), Kovack Advisors, Inc. (5.67K), Penbrook Management LLC (4.10K), GEODE CAPITAL MANAGEMENT, LLC (2.97K).
• Leading sellers of Data I stock in December 2025 included DIMENSIONAL FUND ADVISORS LP (80.88K), RENAISSANCE TECHNOLOGIES LLC (39.20K), CITADEL ADVISORS LLC (8.69K), VANGUARD GROUP INC (8.08K), ACADIAN ASSET MANAGEMENT LLC (8.00K).
• The top 10 institutional holders of Data I for the quarter ending December 2025 included RENAISSANCE TECHNOLOGIES LLC (437.64K), Penbrook Management LLC (356.85K), VANGUARD GROUP INC (350.37K), Kovack Advisors, Inc. (268.91K), DIMENSIONAL FUND ADVISORS LP (180.25K), ACADIAN ASSET MANAGEMENT LLC (125.22K), GEODE CAPITAL MANAGEMENT, LLC (104.58K), ESSEX INVESTMENT MANAGEMENT CO LLC (74.64K), Steward Partners Investment Advisory, LLC (43.47K), CITADEL ADVISORS LLC (32.88K).