Citadel Advisors
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Citadel Advisors’s Data I/O DAIO Stock Holding History

Citadel Advisors’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
2026
Q2 		– Sell
-52,400
Closed -$133K – 13876
2026
Q1 		$133K Sell
52,400
-341,400
-87% -$994K ﹤0.01% 11790
2025
Q4 		$1.25M Buy
+393,800
New +$1.18M ﹤0.01% 6917
2025
Q2 		– Sell
-2,100
Closed -$5.14K – 12959
2025
Q1 		$5.14K Sell
2,100
-100
-5% -$279 ﹤0.01% 13839
2024
Q4 		$6.09K Buy
+2,200
New +$5.77K ﹤0.01% 13819
2024
Q3 		– Sell
-6,500
Closed -$17.9K – 14372
2024
Q2 		$17.9K Buy
6,500
+5,100
+364% +$15.8K ﹤0.01% 12731
2024
Q1 		$4.93K Buy
+1,400
New +$4.59K ﹤0.01% 13779
2023
Q4 		– Sell
-1,300
Closed -$4.95K – 14394
2023
Q3 		$4.95K Buy
1,300
+800
+160% +$3.24K ﹤0.01% 13432
2023
Q2 		$2.15K Sell
500
-1,300
-72% -$5.76K ﹤0.01% 13820
2023
Q1 		$8.95K Sell
1,800
-2,100
-54% -$9.19K ﹤0.01% 13615
2022
Q4 		$15.5K Buy
+3,900
New +$14.1K ﹤0.01% 13325
2022
Q1 		– Sell
-15,800
Closed -$73K – 13736
2021
Q4 		$73K Sell
15,800
-4,700
-23% -$25.2K ﹤0.01% 13004
2021
Q3 		$133K Buy
+20,500
New +$125K ﹤0.01% 12515

Other funds holding DAIO

KWM
Kanen Wealth Management Coconut Creek, Florida $413M AUM 109.83% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
PM
Penbrook Management New York $157M AUM 46.57% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
KA
Kovack Advisors Ft. Lauderdale, Florida $2.08B AUM 38.95% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
EIM
Essex Investment Management Boston, Massachusetts $763M AUM 108.51% 1-Year Est. Return
Vanguard Fiduciary Trust
Vanguard Fiduciary Trust Malvern, Pennsylvania $454B AUM

Citadel Advisors's DAIO Position: Q2 2026 in Review

Citadel Advisors opened a new position in Data I/O (DAIO) in Q2 2026: 86,869 shares worth $342K. The stake represents ﹤0.01% of the portfolio and ranks #10825 among its holdings. This is a return to the name: Citadel Advisors previously reported a position in DAIO as recently as Q4 2025.

Citadel Advisors first reported a position in DAIO in Q1 2014 and has held it in 17 quarters since. 35 funds tracked by Wall St. Rank hold DAIO as of Q2 2026.

  • Citadel Advisors held 86,869 shares of Data I/O worth $342K as of Q2 2026.
  • Data I/O was a new Citadel Advisors position in Q2 2026.
  • Data I/O made up ﹤0.01% of Citadel Advisors's portfolio in Q2 2026, its #10825 holding.
  • Citadel Advisors first reported a position in Data I/O in Q1 2014 and has held it in 17 quarters since.
  • 35 funds tracked by Wall St. Rank held Data I/O as of Q2 2026.

Based on Citadel Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.