ZIX CORP

CUSIP: 98974P100 Class: COM

Petrus Trust Company, LTA's Holding History (CIK: 0001473429)

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

Q1 2018
Shares 32,155 Value ($000) $137 Avg Close — Range —
Q4 2017
Shares 29,275 Value ($000) $128 Avg Close — Range —