ZIX CORP

CUSIP: 98974P100 Class: COM

NISA INVESTMENT ADVISORS, LLC's Holding History (CIK: 0000937615)

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

Q3 2021
Shares 8,750 Value ($000) $62 Avg Close — Range —
Q2 2021
Shares 8,750 Value ($000) $62 Avg Close — Range —