DATA I O CORP

Ticker: DAIO CUSIP: 237690102 Class: Stock

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 180,249 Value ($000) $571 Avg Close $3.00 Range $2.49 - $3.42

Q3 2025

Shares 261,125 Value ($000) $872 Avg Close $3.24 Range $2.63 - $3.57

Q2 2025

Shares 270,110 Value ($000) $829 Avg Close $2.52 Range $1.88 - $3.12

Q1 2025

Shares 257,352 Value ($000) $631 Avg Close $2.79 Range $2.31 - $3.14

Q4 2024

Shares 248,971 Value ($000) $690 Avg Close $2.62 Range $2.40 - $2.97

Q3 2024

Shares 248,971 Value ($000) $640 Avg Close $2.57 Range $2.29 - $2.88

Q2 2024

Shares 248,975 Value ($000) $687 Avg Close $3.10 Range $2.64 - $3.99

Q1 2024

Shares 265,188 Value ($000) $933 Avg Close $3.28 Range $2.83 - $3.73

Q4 2023

Shares 270,198 Value ($000) $794 Avg Close $3.22 Range $2.87 - $3.98

Q3 2023

Shares 270,198 Value ($000) $1,029 Avg Close $4.05 Range $3.60 - $4.80

Q2 2023

Shares 269,668 Value ($000) $1,157 Avg Close $4.43 Range $3.78 - $4.99

Q1 2023

Shares 271,612 Value ($000) $1,350 Avg Close $4.38 Range $3.70 - $4.97

Q4 2022

Shares 277,900 Value ($000) $1 Avg Close $3.61 Range $2.61 - $4.44

Q3 2022

Shares 272,347 Value ($000) $760 Avg Close $3.21 Range $2.76 - $3.85

Q2 2022

Shares 263,294 Value ($000) $808 Avg Close $3.31 Range $2.95 - $4.34

Q1 2022

Shares 269,963 Value ($000) $1,147 Avg Close $4.67 Range $4.19 - $5.12

Q4 2021

Shares 284,732 Value ($000) $1,313 Avg Close $5.35 Range $4.19 - $6.87

Q3 2021

Shares 303,126 Value ($000) $1,973 Avg Close $6.09 Range $4.80 - $7.52

Q2 2021

Shares 318,818 Value ($000) $2,171 Avg Close $5.94 Range $5.15 - $7.24

Q1 2021

Shares 322,928 Value ($000) $1,750 Avg Close $5.33 Range $4.03 - $6.10

Q4 2020

Shares 357,408 Value ($000) $1,473 Avg Close $3.85 Range $2.99 - $4.85

Q3 2020

Shares 396,844 Value ($000) $1,262 Avg Close $3.52 Range $2.86 - $4.06

Q2 2020

Shares 405,172 Value ($000) $1,365 Avg Close $3.13 Range $2.69 - $3.93

Q1 2020

Shares 416,516 Value ($000) $1,170 Avg Close $3.66 Range $2.34 - $4.48

Q4 2019

Shares 419,416 Value ($000) $1,757 Avg Close $4.01 Range $3.23 - $4.52

Q3 2019

Shares 433,444 Value ($000) $1,686 Avg Close $4.04 Range $3.60 - $4.63

Q2 2019

Shares 432,673 Value ($000) $1,947 Avg Close $4.78 Range $4.12 - $5.78

Q1 2019

Shares 439,890 Value ($000) $2,441 Avg Close $5.88 Range $5.00 - $6.88

Q4 2018

Shares 432,071 Value ($000) $2,160 Avg Close $4.94 Range $4.27 - $5.65

Q3 2018

Shares 434,819 Value ($000) $2,274 Avg Close $5.62 Range $4.88 - $6.75

Q2 2018

Shares 429,209 Value ($000) $2,725 Avg Close $7.06 Range $6.04 - $7.97

Q1 2018

Shares 381,047 Value ($000) $2,835 Avg Close $9.95 Range $6.75 - $12.52

Q4 2017

Shares 325,839 Value ($000) $3,923 Avg Close $11.84 Range $8.53 - $16.49

Q3 2017

Shares 347,736 Value ($000) $3,463 Avg Close $8.55 Range $7.03 - $10.19

Q2 2017

Shares 325,713 Value ($000) $2,589 Avg Close $6.67 Range $4.56 - $9.37

Q1 2017

Shares 281,624 Value ($000) $1,405 Avg Close $4.63 Range $4.01 - $5.30

Q4 2016

Shares 300,492 Value ($000) $1,256 Avg Close $3.97 Range $3.39 - $4.40

Q3 2016

Shares 300,492 Value ($000) $1,049 Avg Close $3.26 Range $2.39 - $3.95

Q2 2016

Shares 300,492 Value ($000) $706 Avg Close $2.42 Range $2.07 - $2.70

Q1 2016

Shares 300,492 Value ($000) $775 Avg Close $2.28 Range $2.03 - $2.80

Q4 2015

Shares 300,492 Value ($000) $757 Avg Close $2.73 Range $2.34 - $3.20

Q3 2015

Shares 300,492 Value ($000) $700 Avg Close $2.85 Range $2.26 - $3.62

Q2 2015

Shares 300,492 Value ($000) $1,028 Avg Close $3.39 Range $2.85 - $3.80

Q1 2015

Shares 299,127 Value ($000) $1,107 Avg Close $3.30 Range $3.01 - $3.75

Q4 2014

Shares 302,834 Value ($000) $1,033 Avg Close $3.33 Range $2.92 - $3.83

Q3 2014

Shares 305,978 Value ($000) $1,007 Avg Close $3.08 Range $2.67 - $3.63

Q2 2014

Shares 305,978 Value ($000) $921 Avg Close $2.68 Range $2.18 - $3.15

Q1 2014

Shares 308,461 Value ($000) $740 Avg Close $2.77 Range $2.16 - $3.48

Q4 2013

Shares 309,961 Value ($000) $797 Avg Close $2.80 Range $2.27 - $3.25

Q3 2013

Shares 315,278 Value ($000) $968 Avg Close $2.40 Range $2.02 - $3.24

Q2 2013

Shares 315,278 Value ($000) $703 Avg Close $1.82 Range $1.41 - $2.25

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	180,249	$571	$3.00	$2.49 - $3.42
Q3 2025	261,125	$872	$3.24	$2.63 - $3.57
Q2 2025	270,110	$829	$2.52	$1.88 - $3.12
Q1 2025	257,352	$631	$2.79	$2.31 - $3.14
Q4 2024	248,971	$690	$2.62	$2.40 - $2.97
Q3 2024	248,971	$640	$2.57	$2.29 - $2.88
Q2 2024	248,975	$687	$3.10	$2.64 - $3.99
Q1 2024	265,188	$933	$3.28	$2.83 - $3.73
Q4 2023	270,198	$794	$3.22	$2.87 - $3.98
Q3 2023	270,198	$1,029	$4.05	$3.60 - $4.80
Q2 2023	269,668	$1,157	$4.43	$3.78 - $4.99
Q1 2023	271,612	$1,350	$4.38	$3.70 - $4.97
Q4 2022	277,900	$1	$3.61	$2.61 - $4.44
Q3 2022	272,347	$760	$3.21	$2.76 - $3.85
Q2 2022	263,294	$808	$3.31	$2.95 - $4.34
Q1 2022	269,963	$1,147	$4.67	$4.19 - $5.12
Q4 2021	284,732	$1,313	$5.35	$4.19 - $6.87
Q3 2021	303,126	$1,973	$6.09	$4.80 - $7.52
Q2 2021	318,818	$2,171	$5.94	$5.15 - $7.24
Q1 2021	322,928	$1,750	$5.33	$4.03 - $6.10
Q4 2020	357,408	$1,473	$3.85	$2.99 - $4.85
Q3 2020	396,844	$1,262	$3.52	$2.86 - $4.06
Q2 2020	405,172	$1,365	$3.13	$2.69 - $3.93
Q1 2020	416,516	$1,170	$3.66	$2.34 - $4.48
Q4 2019	419,416	$1,757	$4.01	$3.23 - $4.52
Q3 2019	433,444	$1,686	$4.04	$3.60 - $4.63
Q2 2019	432,673	$1,947	$4.78	$4.12 - $5.78
Q1 2019	439,890	$2,441	$5.88	$5.00 - $6.88
Q4 2018	432,071	$2,160	$4.94	$4.27 - $5.65
Q3 2018	434,819	$2,274	$5.62	$4.88 - $6.75
Q2 2018	429,209	$2,725	$7.06	$6.04 - $7.97
Q1 2018	381,047	$2,835	$9.95	$6.75 - $12.52
Q4 2017	325,839	$3,923	$11.84	$8.53 - $16.49
Q3 2017	347,736	$3,463	$8.55	$7.03 - $10.19
Q2 2017	325,713	$2,589	$6.67	$4.56 - $9.37
Q1 2017	281,624	$1,405	$4.63	$4.01 - $5.30
Q4 2016	300,492	$1,256	$3.97	$3.39 - $4.40
Q3 2016	300,492	$1,049	$3.26	$2.39 - $3.95
Q2 2016	300,492	$706	$2.42	$2.07 - $2.70
Q1 2016	300,492	$775	$2.28	$2.03 - $2.80
Q4 2015	300,492	$757	$2.73	$2.34 - $3.20
Q3 2015	300,492	$700	$2.85	$2.26 - $3.62
Q2 2015	300,492	$1,028	$3.39	$2.85 - $3.80
Q1 2015	299,127	$1,107	$3.30	$3.01 - $3.75
Q4 2014	302,834	$1,033	$3.33	$2.92 - $3.83
Q3 2014	305,978	$1,007	$3.08	$2.67 - $3.63
Q2 2014	305,978	$921	$2.68	$2.18 - $3.15
Q1 2014	308,461	$740	$2.77	$2.16 - $3.48
Q4 2013	309,961	$797	$2.80	$2.27 - $3.25
Q3 2013	315,278	$968	$2.40	$2.02 - $3.24
Q2 2013	315,278	$703	$1.82	$1.41 - $2.25