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DaveManuel.com · Institutional Ownership · Who Owns It

DATA I/O CORP (DAIO)

Institutional ownership reported to the SEC as of Q2 2026, across 32 quarters.

35
Reporting holders
$12.3M
Reported value
29.9%
Of shares outstanding
0.7%
Calls
0.0%
Puts
+5
Holder change

Institutions report 3,107,594 shares against 10,395,627 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.

Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.

Holders

Download these holders as CSV

FilerValueShares Their book Held Change
Kanen Wealth Management LLC$3.3M839,4210.80%21qHELD
RENAISSANCE TECHNOLOGIES LLC$1.5M392,4430.00%31q-3.7%-$59.9K
Penbrook Management LLC$1.4M355,8500.89%31qHELD
VANGUARD CAPITAL MANAGEMENT LLC$1.3M323,6720.00%2q+8.1%+$95.6K
Kovack Advisors, Inc.$1.1M285,4810.05%23q+6.5%+$67.9K
DIMENSIONAL FUND ADVISORS LP$554.3K140,6790.00%31qHELD
GEODE CAPITAL MANAGEMENT, LLC$453.4K115,0570.00%31q+32.5%+$111.1K
ACADIAN ASSET MANAGEMENT LLC$427.0K108,5820.00%31q-12.5%-$61.1K
CITADEL ADVISORS LLC$342.3K86,8690.00%15qHELD
ESSEX INVESTMENT MANAGEMENT CO LLC$293.8K74,5580.04%14qHELD
VANGUARD FIDUCIARY TRUST CO$231.1K58,6430.00%2q+27.9%+$50.4K
SUSQUEHANNA INTERNATIONAL GROUP, LLP$191.3K48,5480.00%5q+80.9%+$85.5K
Steward Partners Investment Advisory, LLC$171.3K43,4720.00%5qHELD
THOMPSON DAVIS & CO., INC.$92.7K23,5330.06%newNEW
JAMES INVESTMENT RESEARCH, INC.$88.3K22,4020.01%31qHELD
NewEdge Advisors, LLC$88.3K22,4020.00%28qHELD
NORTHERN TRUST CORP$86.0K21,8270.00%31q+62.0%+$32.9K
LPL Financial LLC$82.7K21,0000.00%2q-6.9%-$6.1K
GROUP ONE TRADING LLC$79.0K
incl. $53.6K options CALL
6,4500.00%4q+6350.0%+$77.8K
JANE STREET GROUP, LLC$69.8K17,7270.00%newNEW
Legato Capital Management LLC$69.1K17,5500.01%7qHELD
BlackRock, Inc.$67.0K17,0150.00%8qHELD
STATE STREET CORP$63.7K16,1700.00%15qHELD
XTX Topco Ltd$60.2K15,2840.00%newNEW
SIMPLEX TRADING, LLC$55.1K
incl. $38.2K options CALL
4,2790.00%newNEW
HRT FINANCIAL LP$44.0K11,2880.00%newNEW
CITIGROUP INC$28.3K7,1760.00%newNEW
Vanguard Global Advisers, LLC$20.2K5,1240.00%2qHELD
UBS Group AG$16.6K4,2220.00%2q+348.7%+$12.9K
Point Nemo Capital, LLC$2.0K5000.00%newNEW
Tower Research Capital LLC (TRC)$1.2K3140.00%20q-81.3%-$5.4K
BARCLAYS PLC$197500.00%newNEW
Caitong International Asset Management Co., Ltd$1640.00%newNEW
HUNTINGTON NATIONAL BANK$410.00%15qHELD
SBI Securities Co., Ltd.$410.00%7qHELD

Five percent filings

Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →

FiledFormFiler % of class
2026-10-2713GRed Oak Partners, LLCwith 3 co-filers11.2%

What the company announced

Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.

FiledEvent dateWhatSource
2026-10-292026-10-26Material agreement enteredfiling
2026-10-222026-10-18Acquisition or disposal completed Material agreement entered Charter or bylaws amendedfiling

What the insiders did

Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.

Ten percent owners and entities

Usually an institution that crossed a reporting threshold, or a company taking a strategic stake, rather than an individual with a view.

DateInsiderRoleSideSharesValue
2026-10-20Red Oak Partners, LLC10% ownerBought373,133$1,000.0K ×2

Quarter by quarter

Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.

QuarterHoldersValue SharesNewAdded TrimmedOptions
Q3 20265$1.3M452,8150000.0%
Q2 202635$12.3M3,107,5949940.7%
Q1 202630$7.5M2,869,9515263.6%
Q4 202527$9.7M2,955,08737712.9%
Q3 202526$10.9M3,191,2552472.4%
Q2 202526$10.6M3,484,13331050.0%
Q1 202526$7.5M3,065,3901640.3%
Q4 202430$8.7M3,137,4984260.3%
Q3 202429$8.1M3,165,7042560.0%
Q2 202431$9.1M3,283,5183590.2%
Q1 202431$11.8M3,355,68531190.0%
Q4 202330$8.4M2,854,8063890.3%
Q3 202329$12.9M3,383,50426120.1%
Q2 202329$14.5M3,375,2121940.0%
Q1 202330$16.4M3,287,6391590.1%
Q4 202230$11.1M2,783,1459650.1%
Q3 202224$1.7B625,700,5990690.0%
Q2 202224$2.5B811,462,5890860.0%
Q1 202225$3.4B788,367,12903120.0%
Q4 202128$2.7B596,083,65501180.0%
Q3 202133$1.5B232,324,7675780.0%
Q2 202128$1.4B212,146,65741180.0%
Q1 202127$18.6M3,423,52831080.0%
Q4 202025$12.9M3,142,7154260.0%
Q3 202021$8.6M2,706,3760330.0%
Q2 202025$9.1M2,697,1071570.0%
Q1 202025$8.1M2,717,2461660.0%
Q4 201931$66.0M15,704,85218100.0%
Q3 201931$84.6M21,750,13543100.0%
Q2 201930$96.4M21,426,42017100.0%
Q1 201941$97.7M17,602,15961390.0%
Q4 201835$14.7M2,932,3151010.0%