ZIX CORP

CUSIP: 98974P100 Class: COM

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q3 2021
Shares 9,353 Value ($000) $66 Avg Close Range
Q2 2021
Shares 145 Value ($000) $1 Avg Close Range
Q1 2021
Shares 1,460 Value ($000) $11 Avg Close Range
Q4 2020
Shares 3,955 Value ($000) $34 Avg Close Range
Q2 2020
Shares 3,375 Value ($000) $23 Avg Close Range
Q1 2020
Shares 375 Value ($000) $2 Avg Close Range
Q4 2019
Shares 6,980 Value ($000) $47 Avg Close Range
Q3 2019
Shares 8,983 Value ($000) $65 Avg Close Range
Q2 2019
Shares 1,874 Value ($000) $17 Avg Close Range
Q3 2017
Shares 32,200 Value ($000) $157 Avg Close Range
Q2 2017
Shares 22,500 Value ($000) $128 Avg Close Range
Q2 2015
Shares 4,373 Value ($000) $23 Avg Close Range
Q1 2015
Shares 5,600 Value ($000) $22 Avg Close Range
Q4 2014
Shares 5,600 Value ($000) $20 Avg Close Range
Q3 2014
Shares 5,835 Value ($000) $20 Avg Close Range
Q2 2014
Shares 235 Value ($000) $1 Avg Close Range