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

Institutional Holders (2015Q1)
Portfolio Summary: 16 Institutional holders with a total value of $6,011,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 Penbrook Management LLC 490,700 1,816,000 30.21%
2 DIMENSIONAL FUND ADVISORS LP 299,127 1,107,000 18.42%
3 RENAISSANCE TECHNOLOGIES LLC 284,700 1,053,000 17.52%
4 VANGUARD GROUP INC 258,609 957,000 15.92%
5 PERRITT CAPITAL MANAGEMENT INC 177,000 655,000 10.90%
6 ROYAL BANK OF CANADA 25,250 93,000 1.55%
7 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 27,600 87,000 1.45%
8 NORTHERN TRUST CORP 21,511 80,000 1.33%
9 Bank of New York Mellon Corp 20,366 75,000 1.25%
10 BlackRock Institutional Trust Company, N.A. 11,833 44,000 0.73%
11 GLENMEDE TRUST CO NA 7,000 25,000 0.42%
12 MORGAN STANLEY 3,814 14,000 0.23%
13 NEXT Financial Group, Inc 700 2,000 0.03%
14 Tower Research Capital LLC (TRC) 261 1,000 0.02%
15 UBS Group AG 293 1,000 0.02%
16 WELLS FARGO & COMPANY/MN 200 1,000 0.02%

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.