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Livermore
Livermore
ZHEN

Penbrook Management LLC

SEC CIK
0001381055
Latest filing
Jul 23, 2026

DAIO holding history

Data I/O Corp in every 13F filed by Penbrook Management LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

DAIO overviewAll 13F holders of DAIOFull Q2 2026 holdings

Shares (Q2 2026)
355,850
Value
$1.40M
% of portfolio
0.9%
Quarters held
22
Since Q1 2021
Holdings of DAIO by Penbrook Management LLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 2026355,850$1.40M0.9%−1,000−0.3%ReducedHolders
Q1 2026356,850$902.8K0.7%00.0%UnchangedHolders
Q4 2025356,850$1.13M0.8%+4,100+1.2%AddedHolders
Q3 2025352,750$1.18M0.8%+3,000+0.9%AddedHolders
Q2 2025349,750$1.08M0.8%+80,300+29.8%AddedHolders
Q1 2025269,450$660.2K0.5%−2,000−0.7%ReducedHolders
Q4 2024271,450$751.9K0.5%00.0%UnchangedHolders
Q3 2024271,450$697.6K0.5%−40,600−13.0%ReducedHolders
Q2 2024312,050$861.3K0.5%00.0%UnchangedHolders
Q1 2024312,050$1.10M0.7%−30,300−8.9%ReducedHolders
Q4 2023342,350$1.01M0.7%−1,900−0.6%ReducedHolders
Q3 2023344,250$1.31M1.0%−3,000−0.9%ReducedHolders
Q2 2023347,250$1.49M1.1%00.0%UnchangedHolders
Q1 2023347,250$1.73M1.4%−2,500−0.7%ReducedHolders
Q4 2022349,750$1.39M1.2%−1,000−0.3%ReducedHolders
Q3 2022350,750$979.0K0.8%00.0%UnchangedHolders
Q2 2022350,750$1.08M0.8%−200−0.1%ReducedHolders
Q1 2022350,950$1.49M1.0%00.0%UnchangedHolders
Q4 2021350,950$1.62M1.0%+2,000+0.6%AddedHolders
Q3 2021348,950$2.28M1.4%−1,000−0.3%ReducedHolders
Q2 2021349,950$2.38M1.5%−7,300−2.0%ReducedHolders
Q1 2021357,250$1.94M1.4%––Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.