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 OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Keenan W Howard JR 		2. Issuer Name and Ticker or Trading Symbol

Solaris Oilfield Infrastructure, Inc. [ SOI ] 		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)

410 PARK AVENUE, 19TH FLOOR 		3. Date of Earliest Transaction (MM/DD/YYYY)

3/12/2019
(Street)

NEW YORK, NY 10022
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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                  12811   (1) D    
Class A Common Stock   3/12/2019     C    1000000   A   (2) 1000000   (3) I   See Footnote   (4)
Class A Common Stock   3/12/2019     S    1000000   D $15.50   0   I   See Footnote   (4)
Class B Common Stock   (5) 3/12/2019     J (2)    1000000   D   (2) 9954234   (3) I   See Footnote   (4)
Class A Common Stock   3/14/2019     C    1000000   A   (2) 1000000   (3) I   See Footnote   (4)
Class A Common Stock   3/14/2019     S    1000000   D $15.65   0   I   See Footnote   (4)
Class B Common Stock   (5) 3/14/2019     J (2)    1000000   D   (2) 8954234   (3) I   See Footnote   (4)

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 7. Title and Amount of Securities Underlying Derivative Security
(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
Solaris Oilfield Infrastructure, LLC Units     (6) 3/12/2019     C         1000000      (6)   (6) Class A Common Stock   1000000     (6) 9954234   I   See Footnote   (4)
Solaris Oilfield Infrastructure, LLC Units     (6) 3/14/2019     C         1000000      (6)   (6) Class A Common Stock   1000000     (6) 8954234   I   See Footnote   (4)

Explanation of Responses:
(1)  Shares of Class A common stock subject to previously granted Restricted Stock Awards pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan. Certain of such shares of Class A Common Stock remain subject to vesting.
(2)  Pursuant to the Second Amended and Restated Limited Liability Company Agreement of Solaris Oilfield Infrastructure, LLC ("Solaris LLC"), dated as of May 11, 2017, included as Exhibit 10.1 to the Issuer's Current Report on Form 8-K filed May 17, 2017 (the "Solaris LLC Agreement"), the shares of the Issuer's Class B common stock reported herein were cancelled for no consideration on a one-for-one basis upon the redemption by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"), of units in Solaris LLC ("Solaris LLC Units") (together with a corresponding number of shares of Class B common stock) for the shares of the Issuer's Class A common stock reported herein (except the shares of Class A common stock described in footnote 1 above).
(3)  The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for Section 16 or any other purpose.
(4)  These securities are owned directly by Yorktown X. The reporting person is a member and manager of Yorktown X Associates LLC, the general partner of Yorktown X Company LP, the general partner of Yorktown X.
(5)  Each share of Class B common stock has no economic rights but entitles its holder to one vote on all matters to be voted on by stockholders generally.
(6)  Subject to the terms of the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of Class B common stock) are exchangeable from time to time for shares of Class A common stock of the Issuer.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Keenan W Howard JR
410 PARK AVENUE, 19TH FLOOR
NEW YORK, NY 10022 		X



Signatures
/s/ W. Howard Keenan, Jr. 3/14/2019
** Signature of Reporting Person Date


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 control number.
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