ZIX CORP

CUSIP: 98974P100 Class: COM

OBERWEIS ASSET MANAGEMENT INC/'s Holding History (CIK: 0000937886)

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

Q2 2020
Shares 81,300 Value ($000) $561 Avg Close — Range —
Q1 2020
Shares 165,370 Value ($000) $713 Avg Close — Range —
Q4 2019
Shares 238,470 Value ($000) $1,617 Avg Close — Range —
Q3 2019
Shares 292,470 Value ($000) $2,117 Avg Close — Range —
Q2 2019
Shares 170,170 Value ($000) $1,547 Avg Close — Range —
Q3 2017
Shares 100,000 Value ($000) $489 Avg Close — Range —
Q2 2017
Shares 100,000 Value ($000) $569 Avg Close — Range —