Dark
Light
System
Security
ZIX CORP COM
ZIX CORP COM. Institutional holdings reported to the SEC.

Institutional Holders (2015Q1)
Portfolio Summary: 112 Institutional holders with a total value of $136,611,963.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 WELLINGTON MANAGEMENT GROUP LLP 5,228,022 20,547,000 15.04%
2 MIG Capital, LLC 2,309,453 9,076,000 6.64%
3 BlackRock Institutional Trust Company, N.A. 2,143,409 8,424,000 6.17%
4 VANGUARD GROUP INC 1,811,294 7,118,000 5.21%
5 BlackRock Fund Advisors 1,668,567 6,557,000 4.80%
6 RENAISSANCE TECHNOLOGIES LLC 1,520,116 5,974,000 4.37%
7 KORNITZER CAPITAL MANAGEMENT INC /KS 1,517,200 5,963,000 4.36%
8 DIMENSIONAL FUND ADVISORS LP 1,512,808 5,945,000 4.35%
9 PERRITT CAPITAL MANAGEMENT INC 1,086,570 4,270,000 3.13%
10 KESTREL INVESTMENT MANAGEMENT CORP 964,700 3,791,000 2.78%
11 HAWK RIDGE CAPITAL MANAGEMENT LP 954,140 3,750,000 2.75%
12 KENNEDY CAPITAL MANAGEMENT LLC 934,723 3,673,000 2.69%
13 ROYCE & ASSOCIATES LP 932,800 3,666,000 2.68%
14 STATE STREET CORP 931,210 3,661,000 2.68%
15 NORTHERN TRUST CORP 890,635 3,500,000 2.56%
16 THB ASSET MANAGEMENT 854,010 3,356,000 2.46%
17 PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. 460,000 1,808,000 1.32%
18 Bank of New York Mellon Corp 453,204 1,782,000 1.30%
19 RICE HALL JAMES & ASSOCIATES, LLC 448,892 1,764,000 1.29%
20 D. E. Shaw & Co., Inc. 416,614 1,637,000 1.20%
21 Penbrook Management LLC 395,956 1,556,000 1.14%
22 ACADIAN ASSET MANAGEMENT LLC 391,707 1,539,000 1.13%
23 OXFORD ASSET MANAGEMENT LLP 361,525 1,421,000 1.04%
24 CONNORS INVESTOR SERVICES INC 345,979 1,360,000 1.00%
25 GSA CAPITAL PARTNERS LLP 331,649 1,303,000 0.95%
26 PERKINS CAPITAL MANAGEMENT INC 321,989 1,265,000 0.93%
27 MILLENNIUM MANAGEMENT LLC 304,829 1,198,000 0.88%
28 GEODE CAPITAL MANAGEMENT, LLC 288,604 1,134,000 0.83%
29 WHITE PINE CAPITAL LLC 279,475 1,098,000 0.80%
30 Coe Capital Management, LLC 279,296 1,097,633 0.80%
31 HighTower Advisors, LLC 266,180 1,046,000 0.77%
32 WASHINGTON CAPITAL MANAGEMENT, INC 243,579 957,000 0.70%
33 BRIDGEWAY CAPITAL MANAGEMENT, LLC 234,182 920,000 0.67%
34 Stanley-Laman Group, Ltd. 205,082 806,000 0.59%
35 TIAA CREF INVESTMENT MANAGEMENT LLC 200,239 787,000 0.58%
36 Columbia Pacific Advisors, LLC 200,000 786,000 0.58%
37 BlackRock Investment Management, LLC 174,696 687,000 0.50%
38 GMT CAPITAL CORP 163,860 644,000 0.47%
39 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 166,400 609,000 0.45%
40 MORGAN STANLEY 149,317 587,000 0.43%
41 STRS OHIO 131,700 517,000 0.38%
42 STONERIDGE INVESTMENT PARTNERS LLC 127,311 500,000 0.37%
43 BLACKROCK ADVISORS LLC 114,487 450,000 0.33%
44 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 107,717 423,000 0.31%
45 Spark Investment Management LLC 104,900 412,000 0.30%
46 SUSQUEHANNA INTERNATIONAL GROUP, LLP 100,918 397,000 0.29%
47 NEW YORK STATE COMMON RETIREMENT FUND 89,730 353,000 0.26%
48 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 88,900 350,000 0.26%
49 TEACHERS ADVISORS, LLC 85,986 338,000 0.25%
50 MARTIN & CO INC /TN/ 85,100 334,000 0.24%
Page 1 of 3

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.