Sec Form 4/A Filing - ELGAMAL TAHER @ ZIX CORP - 2017-02-13

FORM 4/A Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person ELGAMAL TAHER 2. Issuer Name and Ticker or Trading Symbol ZIX CORP [ ZIXI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 2711 N. HASKELL AVENUE, SUITE 2200 3. Date of Earliest Transaction (MM/DD/YY) 02/13/2017 (Street) DALLAS, TX75204 4. If Amendment, Date Original Filed (MM/DD/YY) 02/15/2017 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/13/2017 A 4,516 ( 1 ) A $ 0 10,721 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Common Stock Option $ 4.96 02/13/2017 A 12,300 ( 2 ) 02/12/2027 Common Stock 12,300 $ 0 52,708 ( 3 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other ELGAMAL TAHER 2711 N. HASKELL AVENUE SUITE 2200 DALLAS, TX75204 X Signatures /s/ Noah F. Webster, Attorney-in-Fact 08/23/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Grant under the Amended and Restated 2012 Incentive Plan (as amended, the "Plan"). The restricted stock ("RS") will vest pro-rata and quarterly over one year, and subject to acceleration under conditions described in the Plan. ( 2 )Grant under the Plan. Options vest pro-rata and quarterly over one year, and subject to acceleration under conditions described in the Plan. ( 3 )This Form 4/A amends the Form 4 filed by the Reporting Person on February 15, 2017. The amount of securities directly beneficially owned by the Reporting Person has been historically reported incorrectly and the resulting amount should have been reported as 52,708 derivative securities beneficially owned.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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