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1(a). Name of Issuer: Zix Corporation
1(b). Address of Issuer’s Principal
Executive Officers: 2711 North Haskell Avenue, Suite 2300, LB
36, Dallas, TX 75204-2960
2(a). Name of Person Filing:
Spring Creek Capital, LLC (“Spring Creek”)
SCC Holdings, LLC (“SCC”)
KIM, LLC (“KIM”)
Koch Investments Group, LLC (“KIG”)
Koch Investments Group Holdings, LLC (“KIGH”)
Koch Industries, Inc. (“Koch Industries”)
(Each a “Reporting Person,” and collectively, the “Reporting
2(b). Address or Principal Business Office
or, if None, Residence:
The principal business office for all Reporting Persons filing
4111 E. 37th
Wichita, KS 67220
2(c). Citizenship: See Item 4 of each
Item 2(d).Title of Class of Securities: Common
Stock, par value $0.01 per share (“Public Shares”).
Item 2(e).CUSIP No.: 98974P100.
Item 3. If this Statement is Filed Pursuant to
§§ 240.13d-1(b) or 240.13d-2(b) or (c), Check Whether the
Person Filing is a: Not applicable.
Item 4. Ownership.
(a) Amount beneficially owned: See Item 9 of each cover page.
(b) Percent of class: 0%
(c) Number of shares as to which the person has:
Sole power to vote or to direct the vote: 0
Shared power to vote or to direct the vote: 0
Sole power to dispose or to direct the disposition of:
Shared power to dispose or to direct the disposition
Item 5. Ownership of 5 Percent or Less of a Class.
If this statement is being filed to report the fact that as of the
date hereof the reporting person has ceased to be the beneficial
owner of more than 5 percent of the class of securities, check
the following [x].
Item 6. Ownership of More than 5 Percent on Behalf of