Data I/O Corp (DAIO) Institutional Ownership

Institutions by Trading Activity

9,389,000Shares Outstanding

3,224,103Shares held by institutions

$9,511,104Value of institutional holdings

34.34%Institutional ownership %

4.96%Shares Changed QoQ

27No. of institutional investors

Data I/O Corp (NASDAQ:DAIO) showed up in the 13F filings of 27 institutional investors as of December 2025.

They owned 34.3% of outstanding stock in December 2025, up from 34.0% the prior quarter.
They increased total shares held in Data I by 4.96% from last quarter, and the number of investors in DAIO decreased 6.9% annually.
Of these 27 funds, 10 grew their exposure to Data I, 8 cut back, and 9 maintained positions.
Combined, these investors held 3.22Mn shares in DAIO for December 2025, up by 152.22K shares quarter on quarter, and up 101.91K shares year over year.
As of December 31, 2025, Penbrook Management LLC held the largest stake in Data I with 356.85K shares, accounting for 3.8% of total shares outstanding.
Business Quant data shows the 2 biggest positions in Data I as of December 2025 are held by Penbrook Management LLC (356.85K), JAMES INVESTMENT RESEARCH, INC. (22.4K).

3,224,103 Total Shares Held

Rows:

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
Kanen Wealth Management LLC	31 Dec, 2025	839,421	0	0.00%	$1,732.00
Kovack Advisors, Inc.	31 Dec, 2025	537,812	274,581	104.31%	$1,723,687.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	437,637	-39,197	-8.22%	$1,387,309.00
Penbrook Management LLC	31 Dec, 2025	356,850	4,100	1.16%	$1,131,215.00
VANGUARD GROUP INC	31 Dec, 2025	350,374	-8,084	-2.26%	$1,110,685.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	180,249	-80,876	-30.97%	$571,389.00
ACADIAN ASSET MANAGEMENT LLC	31 Dec, 2025	125,219	-8,002	-6.01%	$396.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	104,582	2,967	2.92%	$331,593.00
ESSEX INVESTMENT MANAGEMENT CO LLC	31 Dec, 2025	74,641	0	0.00%	$236,612.00
Steward Partners Investment Advisory, LLC	31 Dec, 2025	43,472	8,555	24.50%	$137,806.00
CITADEL ADVISORS LLC	31 Dec, 2025	32,882	-8,690	-20.90%	$104,236.00
JAMES INVESTMENT RESEARCH, INC.	31 Dec, 2025	22,402	0	0.00%	$71,014.00
NewEdge Advisors, LLC	31 Dec, 2025	22,402	0	0.00%	$71,014.00
Legato Capital Management LLC	31 Dec, 2025	17,550	0	0.00%	$55,633.00
BlackRock, Inc.	31 Dec, 2025	17,015	0	0.00%	$53,938.00
State Street Corp	31 Dec, 2025	16,170	0	0.00%	$51,259.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	15,697	269	1.74%	$49,759.00
Northern Trust Corp	31 Dec, 2025	13,476	-5,630	-29.47%	$42,719.00
DRW Securities, LLC	31 Dec, 2025	11,731	11,731	0.00%	$37,187.00
Tower Research Capital LLC (TRC)	31 Dec, 2025	2,131	1,100	106.69%	$6,755.00

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