Sec Form 4 Filing - DAY ROBERT @ Liberty Oilfield Services Inc. - 2019-02-26

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

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person DAY ROBERT 2. Issuer Name and Ticker or Trading Symbol Liberty Oilfield Services Inc. [ LBRT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) X __ Other (specify below) Member of 10% owner group (Last) (First) (Middle) C/O OAKMONT CORPORATION, 865 SOUTH FIGUEROA STREET SUITE 700 3. Date of Earliest Transaction (MM/DD/YY) 02/26/2019 (Street) LOS ANGELES, CA90017 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ 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 02/26/2019 J( 1 ) 363,704 A $ 0 830,415 I See Footnotes ( 2 ) ( 3 ) Class A Common Stock 02/26/2019 J( 1 ) 1,136,296 A $ 0 2,594,412 I See Footnotes ( 2 ) ( 4 ) Class A Common Stock 02/26/2019 S 363,704 D $ 16.03 466,711 I See Footnotes ( 2 ) ( 3 ) Class A Common Stock 02/26/2019 S 1,136,296 D $ 16.03 1,458,116 I See Footnotes ( 2 ) ( 4 ) Class B Common Stock 02/26/2019 J( 1 ) 363,704 D $ 0 2,226,015 I See Footnotes ( 2 ) ( 3 ) Class B Common Stock 02/26/2019 J( 1 ) 1,136,296 D $ 0 6,954,600 I See Footnotes ( 2 ) ( 4 )

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 LLC Units ( 1 ) 02/26/2019 J( 1 ) 363,704 ( 1 ) ( 1 ) Class A Common Stock 363,704 ( 1 ) 2,226,015 I See Footnotes ( 2 ) ( 3 ) LLC Units ( 1 ) 02/26/2019 J( 1 ) 1,136,296 ( 1 ) ( 1 ) Class A Common Stock 1,136,296 ( 1 ) 6,954,600 I See Footnotes ( 2 ) ( 4 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other DAY ROBERT C/O OAKMONT CORPORATION 865 SOUTH FIGUEROA STREET SUITE 700 LOS ANGELES, CA90017 Member of 10% owner group OAKMONT CORP 865 SOUTH FIGUEROA STREET SUITE 700 LOS ANGELES, CA90017 Member of 10% owner group LAUREL ROAD LLC C/O OAKMONT CORPORATION 865 SOUTH FIGUEROA STREET SUITE 700 LOS ANGELES, CA90017 Member of 10% owner group LAUREL ROAD II, LLC C/O OAKMONT CORPORATION 865 SOUTH FIGUEROA STREET SUITE 700 LOS ANGELES, CA90017 Member of 10% owner group Signatures /s/ Robert Miller, by Power of Attorney 02/28/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the terms of the limited liability company agreement of Liberty Oilfield Services New HoldCo LLC ("Liberty LLC"), Liberty LLC redeemed "LLC Units," which represent an ownership interest in Liberty LLC, and an equal number of Class B common stock (the "Class B Common Stock") of Liberty Oilfield Services Inc. (the "Issuer") in exchange for shares of Class A common stock of the Issuer (the "Class A Common Stock") on a one-for-one basis. ( 2 )By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended, each of Robert Day, the sole shareholder of Oakmont Corporation ("Oakmont"), and Oakmont, which is a member and the administrator of each of Laurel Road, LLC ("Laurel 1") and Laurel Road II, LLC ("Laurel 2"), may be deemed to have an indirect pecuniary interest in the securities held directly by Laurel 1 and Laurel 2. In accordance with Instruction 4(b)(iv), the entire amount of the securities held by each of Laurel 1 and Laurel 2 are reported herein. Each reporting person disclaims beneficial ownership of any securities that are not directly owned by such reporting person, except to the extent of their indirect pecuniary interest therein. This report shall not be deemed an admission that such reporting person is a member of a group or the beneficial owner of any securities not directly owned by such reporting person. ( 3 )Shares held directly by Laurel 1. ( 4 )Shares held directly by Laurel 2.

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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.