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 Q1	$139K	Buy	+55,000	New	+$160K	﹤0.01%	11745
2025 Q4	–	Sell	-79,500	Closed	-$266K	–	12864
2025 Q3	$266K	Buy	+79,500	New	+$257K	﹤0.01%	10635
2025 Q2	–	Sell	-5,500	Closed	-$13.5K	–	12960
2025 Q1	$13.5K	Hold	5,500	–	–	﹤0.01%	13398
2024 Q4	$15.2K	Buy	+5,500	New	+$14.4K	﹤0.01%	13364
2024 Q1	–	Sell	-7,900	Closed	-$23.2K	–	14684
2023 Q4	$23.2K	Buy	7,900 +7,200	+1,029%	+$23.2K	﹤0.01%	12495
2023 Q3	$2.67K	Buy	700 +500	+250%	+$2.02K	﹤0.01%	13689
2023 Q2	$858	Hold	200	–	–	﹤0.01%	14037
2023 Q1	$994	Buy	200 +100	+100%	+$438	﹤0.01%	14384
2022 Q4	$397	Buy	+100	New	+$361	﹤0.01%	14674

Other funds holding DAIO

KWM

Kanen Wealth Management Coconut Creek, Florida $278M AUM 38.85% 1-Year Est. Return

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

Penbrook Management New York $132M AUM 29.91% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Kovack Advisors Ft. Lauderdale, Florida $1.87B AUM 29.51% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

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

VFT

Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM

Citadel Advisors's DAIO Position: Q1 2026 in Review

Citadel Advisors sold out of Data I/O (DAIO) in Q1 2026, closing a stake of 32,882 shares — an estimated $95.7K sold.

Citadel Advisors first reported a position in DAIO in Q1 2014 and held it in 16 quarters. The position peaked at $139K in Q3 2025. 29 funds tracked by Wall St. Rank hold DAIO as of Q1 2026.

Citadel Advisors reported no remaining Data I/O position as of Q1 2026 after selling out during the quarter.
Citadel Advisors sold 32,882 Data I/O shares in Q1 2026, an estimated $95.7K.
Citadel Advisors first reported a position in Data I/O in Q1 2014 and held it in 16 quarters.
Citadel Advisors's Data I/O position peaked at $139K in Q3 2025.
29 funds tracked by Wall St. Rank held Data I/O as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.