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DATA I O CORP
DATA I O CORP. Institutional holdings reported to the SEC.

Institutional Holders (2015Q3)
Portfolio Summary: 16 Institutional holders with a total value of $4,504,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 Penbrook Management LLC 487,040 1,135,000 25.20%
2 DIMENSIONAL FUND ADVISORS LP 300,492 700,000 15.54%
3 WELLINGTON MANAGEMENT GROUP LLP 299,530 698,000 15.50%
4 RENAISSANCE TECHNOLOGIES LLC 295,000 687,000 15.25%
5 VANGUARD GROUP INC 261,353 609,000 13.52%
6 PERRITT CAPITAL MANAGEMENT INC 180,888 421,000 9.35%
7 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 27,600 64,000 1.42%
8 ROYAL BANK OF CANADA 21,050 49,000 1.09%
9 Bank of New York Mellon Corp 20,390 48,000 1.07%
10 NORTHERN TRUST CORP 19,003 44,000 0.98%
11 BlackRock Institutional Trust Company, N.A. 11,833 28,000 0.62%
12 MORGAN STANLEY 3,801 9,000 0.20%
13 UBS Group AG 3,053 7,000 0.16%
14 JAMES INVESTMENT RESEARCH, INC. 2,250 5,000 0.11%
15 Tower Research Capital LLC (TRC) 100 0 0.00%
16 WELLS FARGO & COMPANY/MN 200 0 0.00%

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.