| SC 13G/A | 2022-02-09 | SPRING CREEK CAPITAL LLC | ZIX CORP | 0 | 0.0% | EDGAR |
| SC 13D/A | 2021-12-23 | - | - | - | - | EDGAR |
| SC 13D/A | 2021-12-23 | True Wind Capital, L.P. | ZIX CORP | 0 | 0.0% | EDGAR |
| SC 13G | 2021-12-03 | SPRING CREEK CAPITAL LLC | ZIX CORP | 3,876,910 | 6.8% | EDGAR |
| SC 13D/A | 2021-11-29 | OPEN TEXT CORP | ZIX CORP | 22,587,342 | 29.1% | EDGAR |
| SC 13D | 2021-11-17 | OPEN TEXT CORP | ZIX CORP | 24,217,850 | 31.3% | EDGAR |
| SC 13D/A | 2021-11-09 | True Wind Capital, L.P. | ZIX CORP | 20,645,233 | 26.7% | EDGAR |
| SC 13D/A | 2021-09-20 | True Wind Capital, L.P. | ZIX CORP | 20,414,411 | 26.4% | EDGAR |
| SC 13D/A | 2021-06-21 | True Wind Capital, L.P. | ZIX CORP | 20,014,128 | 26.0% | EDGAR |
| SC 13D/A | 2021-03-17 | True Wind Capital, L.P. | ZIX CORP | 19,617,406 | 25.6% | EDGAR |
| SC 13G/A | 2021-02-11 | RENAISSANCE TECHNOLOGIES LLC | ZIX CORP | 1,415,599 | 2.5% | EDGAR |
| SC 13G | 2021-02-11 | GO ETF SOLUTIONS LLP | ZIX CORP | 3,880,303 | 6.8% | EDGAR |
| SC 13G | 2021-02-10 | VANGUARD GROUP INC | ZIX CORP | 3,135,951 | 5.5% | EDGAR |
| SC 13G/A | 2021-02-01 | BlackRock Inc. | ZIX CORP | 4,328,599 | 7.6% | EDGAR |
| SC 13D/A | 2021-01-13 | True Wind Capital, L.P. | ZIX CORP | 19,342,977 | 25.3% | EDGAR |
| SC 13D/A | 2020-10-22 | True Wind Capital, L.P. | ZIX CORP | 19,001,538 | 25.0% | EDGAR |
| SC 13D/A | 2020-06-30 | True Wind Capital, L.P. | ZIX CORP | 18,546,530 | 24.6% | EDGAR |
| SC 13D/A | 2020-03-25 | True Wind Capital, L.P. | ZIX CORP | 18,159,104 | 24.6% | EDGAR |
| SC 13G/A | 2020-02-13 | RENAISSANCE TECHNOLOGIES LLC | ZIX CORP | 3,135,765 | 5.6% | EDGAR |
| SC 13G/A | 2020-02-06 | BlackRock Inc. | ZIX CORP | 4,310,169 | 7.7% | EDGAR |