Sec Form 4 Filing - Stavros Christopher G @ Magnolia Oil & Gas Corp - 2018-07-31

FORM 4 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 Stavros Christopher G 2. Issuer Name and Ticker or Trading Symbol Magnolia Oil & Gas Corp [ MGY] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Executive VP, CFO & Secretary (Last) (First) (Middle) C/O MAGNOLIA OIL & GAS CORPORATION, 1001 FANNIN STREET, SUITE 400 3. Date of Earliest Transaction (MM/DD/YY) 07/31/2018 (Street) HOUSTON, TX77002 4. If Amendment, Date Original Filed (MM/DD/YY) 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 Class A Common Stock 07/31/2018 A 112,500 ( 1 ) A $ 0 113,500 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 Performance Share Units ("PSUs") ( 2 ) 07/31/2018 A 112,500 ( 3 )( 4 ) ( 3 )( 4 ) Class A Common Stock 112,500 $ 0 112,500 ( 3 ) ( 4 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Stavros Christopher G C/O MAGNOLIA OIL & GAS CORPORATION 1001 FANNIN STREET, SUITE 400 HOUSTON, TX77002 Executive VP, CFO & Secretary Signatures /s/ Joan M. Gallagher, as Attorney-in-Fact 08/02/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents restricted stock units ("RSUs") granted under the Magnolia Oil & Gas Corporation Long Term Incentive Plan. Each RSU represents a contingent right to receive one share of Class A common stock ("Class A Common Stock") of Magnolia Oil & Gas Corporation (the "Company"). The Company has approved the grant of RSUs immediately following the effectiveness of the Company's Form S-8 registering shares of Class A Common Stock under the Magnolia Oil & Gas Corporation Long Term Incentive Plan (the "Form S-8 Effective Date"). The RSUs will vest in three equal annual installments beginning on August 1, 2019. ( 2 )Each PSU represents a contingent right to receive 1.5 shares of Class A Common Stock. ( 3 )The Company has approved the grant of PSUs immediately following the Form S-8 Effective Date. Subject to the grantee's continued employment through July 31, 2021 (the "Vesting Date"), the PSUs will vest as follows: (a) 50% of the PSUs will vest on the Vesting Date if for 10 days within any period of 20 consecutive trading days from August 1, 2018 to July 31, 2021 (the "Performance Period") the closing price of Class A Common Stock (the "Closing Price") is equal to or greater than $12.00 (the "Threshold Level"), (b) 100% of the PSUs will vest on the Vesting Date if for 15 days within any period of 20 consecutive trading days during the Performance Period the Closing Price is equal to or greater than $13.00 (the "Target Level") and (c) 150% of the PSUs will vest on the Vesting Date if for 20 consecutive trading days during the Performance Period the Closing Price is equal to or greater than $14.00 (the "Maximum Level"). ( 4 )(Continued from footnote 3) If the Closing Price is between the Threshold Level and Target Level or the Target Level and Maximum Level for 10 days or 15 days, respectively, during any period of 20 consecutive trading days during the Performance Period the percent of PSUs that will vest will be determined using linear interpolation.

Remarks: Joan M. Gallagher is signing on behalf Mr. Stavros pursuant to the Power of Attorney dated July 31, 2018, which was previously filed with the Securities and Exchange Commission.

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).

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