ZIX CORP Form DEFA14A: Additional definitive proxy soliciting materials

Filings on SEC EDGAR, newest first; amendments sit with their base form. Values are as filed.

2021-04-23: Form DEFA14A; Description DEFA14A; Document d138607ddefa14a.htm.
2020-04-24: Form DEFA14A; Description DEFA14A; Document zixi-defa14a_20200424.htm.
2019-04-26: Form DEFA14A; Description DEFA14A; Document d719638ddefa14a.htm.
2018-04-27: Form DEFA14A; Description DEFA14A; Document d445486ddefa14a.htm.

Filed	Form	Description	Document
2021-04-23	DEFA14A	DEFA14A	d138607ddefa14a.htm
2020-04-24	DEFA14A	DEFA14A	zixi-defa14a_20200424.htm
2019-04-26	DEFA14A	DEFA14A	d719638ddefa14a.htm
2018-04-27	DEFA14A	DEFA14A	d445486ddefa14a.htm
2017-04-27	DEFA14A	DEFA14A	d530108ddefa14a.htm
2016-04-29	DEFA14A	DEFA14A	d126583ddefa14a.htm
2015-05-13	DEFA14A	DEFA14A	d893572ddefa14a.htm
2014-04-30	DEFA14A	DEFA14A	d691738ddefa14a.htm
2013-06-07	DEFA14A	DEFINITIVE ADDITIONAL MATERIALS	d550660ddefa14a.htm
2013-05-03	DEFA14A	DEFA14A	d517203ddefa14a.htm
2012-10-29	DEFA14A	DEFINITIVE ADDITIONAL MATERIALS	d429284ddefa14a.htm
2012-10-29	DEFA14A	FORM 8-K	d428963d8k.htm
2012-05-31	DEFA14A	DEFA 14A	d361644ddefa14a.htm
2012-04-27	DEFA14A	NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS	d319944ddefa14a.htm
2011-05-25	DEFA14A	DEFA14A	d82563adefa14a.htm
2011-05-25	DEFA14A	DEFA14A	d82563defa14a.htm
2011-05-09	DEFA14A	DEFA14A	d82138defa14a.htm
2010-04-20	DEFA14A	Additional definitive proxy soliciting materials	i10877.htm
2009-04-21	DEFA14A	DEFA14A	d66250dadefa14a.htm