Stock

Data I/O Corp

DAIO · held by 29 managers

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025

Reported value

$6.87M

Holders

+4 new · −4 exited

Holders’ est. mark

$1.08M

Price effect on 22 books still in the name

Largest holder

$2.12M

Kanen Wealth Management LLC

Notable conviction

Share of each notable manager’s 13F book.

Renaissance Technologies0.0% · $1.03M
State Street0.0% · $40.9K

Holder count by quarter

Q3 2025 Q4 2025 Q1 2026

Who holds it

Notable only

Investor	Shares	Value	Est. mark	Change
Kanen Wealth Management LLC	839.4K	$2.12M	$2.12M	Added$2.12M
Renaissance Technologies	407.6K	$1.03M	−$260.9K	Cut−$356K
Penbrook Management LLC	356.9K	$902.8K	−$228.4K	Cut−$228.4K
VANGUARD CAPITAL MANAGEMENT LLC	299.4K	$757.5K	—	Held
Kovack Advisors, Inc.	268K	$635.1K	−$214.4K	Cut−$217.3K
DIMENSIONAL FUND ADVISORS LP	140.7K	$355.9K	−$90K	Cut−$215.5K
GEODE CAPITAL MANAGEMENT, LLC	86.9K	$219.8K	−$55.6K	Cut−$111.8K
ESSEX INVESTMENT MANAGEMENT CO LLC	74.6K	$188.8K	−$47.8K	Cut−$47.8K
VANGUARD FIDUCIARY TRUST CO	45.9K	$116K	—	Held
Steward Partners Investment Advisory, LLC	43.5K	$110K	−$27.8K	Cut−$27.8K
SUSQUEHANNA INTERNATIONAL GROUP, LLP	26.8K	$67.9K	−$10K	Added$18.1K
LPL Financial LLC	22.5K	$57K	—	New
JAMES INVESTMENT RESEARCH, INC.	22.4K	$56.7K	−$14.3K	Cut−$14.3K
Legato Capital Management LLC	17.6K	$44.4K	−$11.2K	Cut−$11.2K
BlackRock, Inc.	17K	$43K	−$10.9K	Cut−$10.9K
State Street	16.2K	$40.9K	−$10.3K	Cut−$10.3K
GOLDMAN SACHS GROUP INC	13.8K	$34.9K	—	New
NORTHERN TRUST CORP	13.5K	$34.1K	−$8.63K	Cut−$8.63K
NewEdge Advisors, LLC	22.4K	$22.4K	−$48.6K	Cut−$48.6K
Vanguard Global Advisers, LLC	5.12K	$13K	—	Held
SIMPLEX TRADING, LLC	2.76K	$6.98K	−$1.24K	Added$856
Tower Research Capital LLC (TRC)	1.68K	$4.25K	−$1.08K	Cut−$2.5K
UBS Group AG	941	$2.38K	—	New
ACADIAN ASSET MANAGEMENT LLC	124.1K	$313	−$80	Cut−$83
GROUP ONE TRADING LLC	100	$253	—	New
BARD ASSOCIATES INC	100	$253	−$64	Cut−$64
HUNTINGTON NATIONAL BANK	1	$3	$0	Held
SBI Securities Co., Ltd.	1	$3	$0	Held
ROYAL BANK OF CANADA	136	$0	$0	Held

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.