Data I/O Corporation
US ˙ NasdaqCM ˙ US2376901029

SecurityDAIO / Data I/O Corporation
InstitutionNorthern Trust Corp
Latest Disclosed Ownership13,476 shares
Latest Disclosed Value $ 34,094
Northern Trust Corp ownership in DAIO / Data I/O Corporation

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 13,476 shares of Data I/O Corporation (US:DAIO) valued at $34,094 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 13,476 shares of Data I/O Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $52,961 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F DATA I O COM 237690102 13,476 0 0.00 34 -19.05 0.0000
2026-02-17 2025-12-31 13F DATA I O COM 237690102 13,476 -5,630 -29.47 43 -33.33 0.0000
2025-11-14 2025-09-30 13F DATA I O COM 237690102 19,106 829 4.54 64 12.50 0.0000
2025-08-13 2025-06-30 13F DATA I O COM 237690102 18,277 2,253 14.06 57 43.59 0.0000
2025-05-13 2025-03-31 13F DATA I O COM 237690102 16,024 0 0.00 39 -11.36 0.0000
2025-02-14 2024-12-31 13F DATA I O COM 237690102 16,024 0 0.00 44 7.32 0.0000
2024-11-13 2024-09-30 13F DATA I O COM 237690102 16,024 -3,187 -16.59 41 -22.64 0.0000
2024-08-14 2024-06-30 13F DATA I O COM 237690102 19,211 -1,064 -5.25 53 -25.35 0.0000
2024-05-14 2024-03-31 13F DATA I O COM 237690102 20,275 150 0.75 71 20.34 0.0000
2024-02-13 2023-12-31 13F DATA I O COM 237690102 20,125 -1,021 -4.83 59 -26.25 0.0000
2023-11-13 2023-09-30 13F DATA I O COM 237690102 21,146 -1,761 -7.69 81 -18.37 0.0000
2023-08-11 2023-06-30 13F DATA I O COM 237690102 22,907 109 0.48 98 -13.27 0.0000
2023-05-15 2023-03-31 13F DATA I O COM 237690102 22,798 44 0.19 113 25.56 0.0000
2023-02-13 2022-12-31 13F DATA I O COM 237690102 22,754 125 0.55 90 42.86 0.0000
2022-11-14 2022-09-30 13F DATA I O COM 237690102 22,629 578 2.62 63 -7.35 0.0000
2022-08-12 2022-06-30 13F DATA I O COM 237690102 22,051 314 1.44 68 -26.09 0.0000
2022-05-13 2022-03-31 13F DATA I O COM 237690102 21,737 -294 -1.33 92 -9.80 0.0000
2022-02-08 2021-12-31 13F DATA I O COM 237690102 22,031 -83 -0.38 102 -29.17 0.0000
2021-11-15 2021-09-30 13F DATA I O COM 237690102 22,114 72 0.33 144 -4.00 0.0000
2021-08-13 2021-06-30 13F DATA I O COM 237690102 22,042 32 0.15 150 26.05 0.0000
2021-05-12 2021-03-31 13F DATA I O COM 237690102 22,010 -3,187 -12.65 119 14.42 0.0000
2021-02-11 2020-12-31 13F DATA I O COM 237690102 25,197 -4,264 -14.47 104 11.83 0.0000
2020-11-16 2020-09-30 13F DATA I O COM 237690102 29,461 96 0.33 93 -6.06 0.0000
2020-08-14 2020-06-30 13F DATA I O COM 237690102 29,365 3,047 11.58 99 33.78 0.0000
2020-05-14 2020-03-31 13F DATA I O COM 237690102 26,318 300 1.15 74 -33.33 0.0000
2020-02-14 2019-12-31 13F DATA I O COM 237690102 26,018 -215 -0.82 111 8.82 0.0000
2019-11-13 2019-09-30 13F DATA I O COM 237690102 26,233 -300 -1.13 102 -14.29 0.0000
2019-08-13 2019-06-30 13F DATA I O COM 237690102 26,533 0 0.00 119 -19.05 0.0000
2019-05-13 2019-03-31 13F DATA I O COM 237690102 26,533 148 0.56 147 11.36 0.0000
2019-02-12 2018-12-31 13F DATA I O COM 237690102 26,385 0 0.00 132 -4.35 0.0000
2018-11-14 2018-09-30 13F DATA I O COM 237690102 26,385 0 0.00 138 -17.86 0.0000
2018-09-18 2018-06-30 13F/A-1 DATA I O COM 237690102 26,385 100 0.38 168 -13.85 0.0000
2018-08-14 2018-06-30 13F DATA I O COM 237690102 26,385 100 168
2018-05-09 2018-03-31 13F DATA I O COM 237690102 26,285 -1,456 -5.25 195 -41.62 0.0001
2018-02-14 2017-12-31 13F DATA I O COM 237690102 27,741 361 1.32 334 22.79 0.0001
2017-11-13 2017-09-30 13F DATA I O COM 237690102 27,380 -200 -0.73 272 24.20 0.0001
2017-08-11 2017-06-30 13F DATA I O COM 237690102 27,580 7,634 38.27 219 121.21 0.0001
2017-05-12 2017-03-31 13F DATA I O COM 237690102 19,946 1,101 5.84 99 25.32 0.0000
2017-02-13 2016-12-31 13F DATA I O COM 237690102 18,845 -239 -1.25 79 16.18 0.0000
2016-11-09 2016-09-30 13F DATA I O COM 237690102 19,084 81 0.43 68 51.11 0.0000
2016-08-12 2016-06-30 13F DATA I O COM 237690102 19,003 0 0.00 45 -10.00 0.0000
2016-08-19 2016-03-31 13F/A-1 DATA I O COM 237690102 19,003 0 0.00 50 4.17 0.0000
2016-05-13 2016-03-31 13F DATA I O COM 237690102 19,003 50
2016-02-12 2015-12-31 13F DATA I O COM 237690102 19,003 0 0.00 48 9.09 0.0000
2015-11-12 2015-09-30 13F DATA I O COM 237690102 19,003 0 0.00 44 -31.25 0.0000
2015-08-13 2015-06-30 13F DATA I O COM 237690102 19,003 -2,508 -11.66 64 -20.00 0.0000
2015-05-14 2015-03-31 13F DATA I O COM 237690102 21,511 -1,557 -6.75 80 2.56 0.0000
2015-02-12 2014-12-31 13F DATA I O COM 237690102 23,068 87 0.38 78 2.63 0.0000
2014-11-13 2014-09-30 13F DATA I O COM 237690102 22,981 87 0.38 76 10.14 0.0000
2014-08-14 2014-06-30 13F DATA I O COM 237690102 22,894 0 0.00 69 25.45 0.0000
2014-05-14 2014-03-31 13F DATA I O COM 237690102 22,894 0 0.00 55 -6.78 0.0000
2014-02-21 2013-12-31 13F/A-1 DATA I O COM 237690102 22,894 -200 -0.87 59 -16.90 0.0000
2014-02-12 2013-12-31 13F DATA I O COM 237690102 22,894 59
2013-11-13 2013-09-30 13F DATA I O COM 237690102 23,094 -4,887 -17.47 71 14.52 0.0000
2013-08-09 2013-06-30 13F DATA I O COM 237690102 27,981 27,981 62 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.