ZIX CORP

CUSIP: 98974P100 Class: COM

Caprock Group, LLC's Holding History (CIK: 0001610769)

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

Q4 2017
Shares 12,470 Value ($000) $57 Avg Close — Range —
Q3 2017
Shares 12,470 Value ($000) $61 Avg Close — Range —
Q2 2017
Shares 12,470 Value ($000) $71 Avg Close — Range —