Vanguard Group
DAIO icon

Vanguard Group’s Data I/O DAIO Stock Holding History

Vanguard Group’s Portfolio DAIO Stock Details DAIO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		$1.11M Sell
350,374
-8,084
-2% -$24.3K ﹤0.01% 3748
2025
Q3 		$1.2M Hold
358,458
– – ﹤0.01% 3736
2025
Q2 		$1.1M Hold
358,458
– – ﹤0.01% 3718
2025
Q1 		$878K Sell
358,458
-1,496
-0.4% -$4.17K ﹤0.01% 3749
2024
Q4 		$997K Sell
359,954
-1,900
-0.5% -$4.98K ﹤0.01% 3767
2024
Q3 		$930K Hold
361,854
– – ﹤0.01% 3796
2024
Q2 		$999K Buy
361,854
+10,465
+3% +$32.5K ﹤0.01% 3791
2024
Q1 		$1.24M Buy
351,389
+22,020
+7% +$72.1K ﹤0.01% 3741
2023
Q4 		$968K Buy
329,369
+413
+0.1% +$1.33K ﹤0.01% 3837
2023
Q3 		$1.25M Hold
328,956
– – ﹤0.01% 3751
2023
Q2 		$1.41M Hold
328,956
– – ﹤0.01% 3787
2023
Q1 		$1.63M Hold
328,956
– – ﹤0.01% 3745
2022
Q4 		$1.31M Buy
328,956
+112
+0% +$405 ﹤0.01% 3818
2022
Q3 		$917K Hold
328,844
– – ﹤0.01% 4029
2022
Q2 		$1.01M Hold
328,844
– – ﹤0.01% 4083
2022
Q1 		$1.4M Sell
328,844
-2,095
-0.6% -$9.79K ﹤0.01% 4106
2021
Q4 		$1.53M Sell
330,939
-452
-0.1% -$2.42K ﹤0.01% 4135
2021
Q3 		$2.16M Hold
331,391
– – ﹤0.01% 4037
2021
Q2 		$2.26M Buy
331,391
+5,124
+2% +$30.4K ﹤0.01% 3938
2021
Q1 		$1.77M Hold
326,267
– – ﹤0.01% 3890
2020
Q4 		$1.34M Hold
326,267
– – ﹤0.01% 3756
2020
Q3 		$1.04M Hold
326,267
– – ﹤0.01% 3651
2020
Q2 		$1.1M Hold
326,267
– – ﹤0.01% 3589
2020
Q1 		$917K Hold
326,267
– – ﹤0.01% 3511
2019
Q4 		$1.37M Hold
326,267
– – ﹤0.01% 3550
2019
Q3 		$1.27M Buy
326,267
+1,469
+0.5% +$5.93K ﹤0.01% 3584
2019
Q2 		$1.46M Hold
324,798
– – ﹤0.01% 3566
2019
Q1 		$1.8M Buy
324,798
+3,958
+1% +$23.3K ﹤0.01% 3486
2018
Q4 		$1.6M Sell
320,840
-44,360
-12% -$219K ﹤0.01% 3439
2018
Q3 		$1.91M Sell
365,200
-997
-0.3% -$5.6K ﹤0.01% 3548
2018
Q2 		$2.33M Sell
366,197
-5,250
-1% -$37.1K ﹤0.01% 3453
2018
Q1 		$2.76M Buy
371,447
+5,655
+2% +$56.3K ﹤0.01% 3350
2017
Q4 		$4.4M Buy
365,792
+39,112
+12% +$463K ﹤0.01% 3187
2017
Q3 		$3.25M Buy
326,680
+53,758
+20% +$459K ﹤0.01% 3264
2017
Q2 		$2.17M Buy
272,922
+16,514
+6% +$110K ﹤0.01% 3351
2017
Q1 		$1.28M Buy
256,408
+5,600
+2% +$25.9K ﹤0.01% 3522
2016
Q4 		$1.05M Sell
250,808
-400
-0.2% -$1.59K ﹤0.01% 3545
2016
Q3 		$877K Buy
251,208
+1,100
+0.4% +$3.61K ﹤0.01% 3613
2016
Q2 		$588K Sell
250,108
-11,245
-4% -$27.2K ﹤0.01% 3755
2016
Q1 		$674K Hold
261,353
– – ﹤0.01% 3705
2015
Q4 		$658K Hold
261,353
– – ﹤0.01% 3752
2015
Q3 		$609K Hold
261,353
– – ﹤0.01% 3793
2015
Q2 		$894K Buy
261,353
+2,744
+1% +$9.32K ﹤0.01% 3689
2015
Q1 		$957K Buy
258,609
+2,200
+0.9% +$7.25K ﹤0.01% 3643
2014
Q4 		$874K Hold
256,409
– – ﹤0.01% 3567
2014
Q3 		$844K Buy
256,409
+27,911
+12% +$86.1K ﹤0.01% 3558
2014
Q2 		$688K Buy
228,498
+12,999
+6% +$34.9K ﹤0.01% 3593
2014
Q1 		$517K Buy
215,499
+19,386
+10% +$53.6K ﹤0.01% 3648
2013
Q4 		$504K Buy
196,113
+14,920
+8% +$41.8K ﹤0.01% 3594
2013
Q3 		$556K Hold
181,193
– – ﹤0.01% 3525
2013
Q2 		$404K Buy
+181,193
New +$329K ﹤0.01% 3532

Other funds holding DAIO

KWM
Kanen Wealth Management Coconut Creek, Florida $278M AUM 38.85% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
PM
Penbrook Management New York $132M AUM 29.91% 1-Year Est. Return
KA
Kovack Advisors Ft. Lauderdale, Florida $1.87B AUM 29.51% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
EIM
Essex Investment Management Boston, Massachusetts $632M AUM 95.36% 1-Year Est. Return
SPIA
Steward Partners Investment Advisory New York $19.6B AUM 22.89% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Vanguard Group's DAIO Position: Q4 2025 in Review

Vanguard Group reduced its Data I/O (DAIO) stake by 2.3% in Q4 2025, selling an estimated $24.3K and leaving 350,374 shares worth $1.11M. The position accounts for ﹤0.01% of the portfolio, ranked #3748.

Vanguard Group first reported a position in DAIO in Q2 2013 and has held it in 51 quarters since. The position peaked at $4.4M in Q4 2017. 27 funds tracked by Wall St. Rank hold DAIO as of Q4 2025.

  • Vanguard Group held 350,374 shares of Data I/O worth $1.11M as of Q4 2025.
  • Vanguard Group sold 8,084 Data I/O shares in Q4 2025, an estimated $24.3K.
  • Data I/O made up ﹤0.01% of Vanguard Group's portfolio in Q4 2025, its #3748 holding.
  • Vanguard Group first reported a position in Data I/O in Q2 2013 and has held it in 51 quarters since.
  • Vanguard Group's Data I/O position peaked at $4.4M in Q4 2017.
  • 27 funds tracked by Wall St. Rank held Data I/O as of Q4 2025.

Based on Vanguard Group's 13F filing for Q4 2025, filed 29 Jan 2026.