ZIX CORP

CUSIP: 98974P100 Class: COM

SFMG, LLC's Holding History (CIK: 0001512026)

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

Q3 2015
Shares 10,120 Value ($000) $43 Avg Close — Range —
Q2 2015
Shares 10,120 Value ($000) $52 Avg Close — Range —
Q1 2015
Shares 35,420 Value ($000) $139 Avg Close — Range —
Q4 2014
Shares 10,120 Value ($000) $36 Avg Close — Range —
Q3 2014
Shares 10,120 Value ($000) $35 Avg Close — Range —
Q2 2014
Shares 10,120 Value ($000) $35 Avg Close — Range —
Q1 2014
Shares 10,120 Value ($000) $42 Avg Close — Range —