Simplex Trading’s Data I/O DAIO Stock Holding History

Simplex Trading’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 Q3	$4.09K	Sell	1,397 -2,882	-67%	-$8.79K	﹤0.01%	8223
2026 Q2	$16.9K	Buy	4,279 +1,520	+55%	+$4.77K	﹤0.01%	7259
2026 Q1	$6.98K	Buy	2,759 +827	+43%	+$2.41K	﹤0.01%	7663
2025 Q4	$6.12K	Sell	1,932 -880	-31%	-$2.64K	﹤0.01%	7309
2025 Q3	$9K	Sell	2,812 -2,369	-46%	-$7.67K	﹤0.01%	7949
2025 Q2	$16K	Buy	5,181 +2,987	+136%	+$7.53K	﹤0.01%	6947
2025 Q1	$5K	Buy	+2,194	New	+$6.12K	﹤0.01%	7530
2024 Q3	–	Sell	-1,262	Closed	-$3K	–	8672
2024 Q2	$3K	Buy	1,262 +363	+40%	+$1.13K	﹤0.01%	8095
2024 Q1	$3K	Buy	+899	New	+$2.94K	﹤0.01%	8236
2022 Q2	–	Sell	-100	Closed	–	–	10130
2022 Q1	$0	Buy	+100	New	+$467	﹤0.01%	10548

Other funds holding DAIO

Kanen Wealth Management Coconut Creek, Florida $284M AUM 41.47% 1-Year Est. Return

Renaissance Technologies New York $73.4B AUM 32.8% 1-Year Est. Return

Penbrook Management New York $169M AUM 32.52% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM

Kovack Advisors Ft. Lauderdale, Florida $2.38B AUM 30.08% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $551B AUM 33.95% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return

Essex Investment Management Boston, Massachusetts $675M AUM 61.81% 1-Year Est. Return

Steward Partners Investment Advisory New York $21.5B AUM 22.23% 1-Year Est. Return

Vanguard Fiduciary Trust Malvern, Pennsylvania $463B AUM

Simplex Trading's DAIO Position: Q3 2026 in Review

Simplex Trading reduced its Data I/O (DAIO) stake by 67% in Q3 2026, selling an estimated $8.79K and leaving 1,397 shares worth $4.09K. The position accounts for ﹤0.01% of the portfolio, ranked #8223.

Simplex Trading first reported a position in DAIO in Q1 2022 and has held it in 10 quarters since. The position peaked at $16.9K in Q2 2026. 25 funds tracked by Wall St. Rank hold DAIO as of Q3 2026.

Simplex Trading held 1,397 shares of Data I/O worth $4.09K as of Q3 2026.
Simplex Trading sold 2,882 Data I/O shares in Q3 2026, an estimated $8.79K.
Data I/O made up ﹤0.01% of Simplex Trading's portfolio in Q3 2026, its #8223 holding.
Simplex Trading first reported a position in Data I/O in Q1 2022 and has held it in 10 quarters since.
Simplex Trading's Data I/O position peaked at $16.9K in Q2 2026.
25 funds tracked by Wall St. Rank held Data I/O as of Q3 2026.

Based on Simplex Trading's 13F filing for Q3 2026, filed 4 Nov 2026.