ZIX CORP

CUSIP: 98974P100 Class: COM

AMERICAN CENTURY COMPANIES INC's Holding History (CIK: 0000748054)

Note: Option positions (PUT/CALL) are excluded.

Q1 2019
Shares 262,362 Value ($000) $1,805 Avg Close — Range —
Q4 2018
Shares 309,981 Value ($000) $1,776 Avg Close — Range —
Q3 2018
Shares 313,006 Value ($000) $1,737 Avg Close — Range —
Q2 2018
Shares 307,681 Value ($000) $1,658 Avg Close — Range —
Q1 2018
Shares 302,367 Value ($000) $1,291 Avg Close — Range —
Q4 2017
Shares 302,367 Value ($000) $1,324 Avg Close — Range —
Q3 2017
Shares 300,269 Value ($000) $1,468 Avg Close — Range —
Q2 2017
Shares 287,784 Value ($000) $1,637 Avg Close — Range —
Q1 2017
Shares 287,784 Value ($000) $1,384 Avg Close — Range —
Q4 2016
Shares 284,535 Value ($000) $1,406 Avg Close — Range —
Q3 2016
Shares 278,579 Value ($000) $1,142 Avg Close — Range —
Q2 2016
Shares 253,355 Value ($000) $950 Avg Close — Range —
Q1 2016
Shares 253,355 Value ($000) $996 Avg Close — Range —
Q4 2015
Shares 115,067 Value ($000) $585 Avg Close — Range —