<SEC-DOCUMENT>0001140361-25-004725.txt : 20250214
<SEC-HEADER>0001140361-25-004725.hdr.sgml : 20250214
<ACCEPTANCE-DATETIME>20250214153940
ACCESSION NUMBER:		0001140361-25-004725
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250214
DATE AS OF CHANGE:		20250214

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Solaris Energy Infrastructure, Inc.
		CENTRAL INDEX KEY:			0001697500
		STANDARD INDUSTRIAL CLASSIFICATION:	OIL & GAS FILED MACHINERY & EQUIPMENT [3533]
		ORGANIZATION NAME:           	01 Energy & Transportation
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-89983
		FILM NUMBER:		25627625

	BUSINESS ADDRESS:	
		STREET 1:		9651 KATY FREEWAY
		STREET 2:		SUITE 300
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77024
		BUSINESS PHONE:		(281)501-3070

	MAIL ADDRESS:	
		STREET 1:		9651 KATY FREEWAY
		STREET 2:		SUITE 300
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77024

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Solaris Oilfield Infrastructure, Inc.
		DATE OF NAME CHANGE:	20170207

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Yorktown Energy Partners X, L.P.
		CENTRAL INDEX KEY:			0001577919
		ORGANIZATION NAME:           	
		IRS NUMBER:				462445852
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		410 PARK AVENUE
		STREET 2:		20TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		212-515-2115

	MAIL ADDRESS:	
		STREET 1:		410 PARK AVENUE
		STREET 2:		20TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/schedule13g" xmlns:com="http://www.sec.gov/edgar/common">
<headerData>
<submissionType>SCHEDULE 13G/A</submissionType>
<previousAccessionNumber>0001193125-18-045614</previousAccessionNumber>
<filerInfo>
<filer>
<filerCredentials>
<cik>0001577919</cik>
<ccc>XXXXXXXX</ccc>
</filerCredentials>
</filer>
<liveTestFlag>LIVE</liveTestFlag>



</filerInfo>
</headerData>
<formData>
<coverPageHeader>
<amendmentNo>3</amendmentNo>
<securitiesClassTitle>Class A common stock, par value $0.01 per share</securitiesClassTitle>
<eventDateRequiresFilingThisStatement>12/31/2024</eventDateRequiresFilingThisStatement>
<issuerInfo>
<issuerCik>0001697500</issuerCik>
<issuerName>Solaris Oilfield Infrastructure, Inc.</issuerName>
<issuerCusip>83418M103</issuerCusip>
<issuerPrincipalExecutiveOfficeAddress>
<com:street1>9811 Katy Freeway, Suite 700</com:street1>
<com:city>Houston</com:city>
<com:stateOrCountry>TX</com:stateOrCountry>
<com:zipCode>77024</com:zipCode>
</issuerPrincipalExecutiveOfficeAddress>
</issuerInfo>
<designateRulesPursuantThisScheduleFiled>
<designateRulePursuantThisScheduleFiled>Rule 13d-1(d)</designateRulePursuantThisScheduleFiled>
</designateRulesPursuantThisScheduleFiled>
</coverPageHeader>
<coverPageHeaderReportingPersonDetails>

<reportingPersonName>Yorktown Energy Partners X, L.P.</reportingPersonName>
<citizenshipOrOrganization>DE</citizenshipOrOrganization>
<reportingPersonBeneficiallyOwnedNumberOfShares>
<soleVotingPower>7079234</soleVotingPower>
<sharedVotingPower>0</sharedVotingPower>
<soleDispositivePower>7079234</soleDispositivePower>
<sharedDispositivePower>0</sharedDispositivePower>
</reportingPersonBeneficiallyOwnedNumberOfShares>
<reportingPersonBeneficiallyOwnedAggregateNumberOfShares>7079234</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
<aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
<classPercent>16.05</classPercent>
<typeOfReportingPerson>PN</typeOfReportingPerson>
</coverPageHeaderReportingPersonDetails>
<coverPageHeaderReportingPersonDetails>

<reportingPersonName>YORKTOWN X COMPANY LP</reportingPersonName>
<citizenshipOrOrganization>DE</citizenshipOrOrganization>
<reportingPersonBeneficiallyOwnedNumberOfShares>
<soleVotingPower>7079234</soleVotingPower>
<sharedVotingPower>0</sharedVotingPower>
<soleDispositivePower>7079234</soleDispositivePower>
<sharedDispositivePower>0</sharedDispositivePower>
</reportingPersonBeneficiallyOwnedNumberOfShares>
<reportingPersonBeneficiallyOwnedAggregateNumberOfShares>7079234</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
<aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
<classPercent>16.05</classPercent>
<typeOfReportingPerson>PN</typeOfReportingPerson>
</coverPageHeaderReportingPersonDetails>
<coverPageHeaderReportingPersonDetails>

<reportingPersonName>YORKTOWN X ASSOCIATES LLC</reportingPersonName>
<citizenshipOrOrganization>DE</citizenshipOrOrganization>
<reportingPersonBeneficiallyOwnedNumberOfShares>
<soleVotingPower>7079234</soleVotingPower>
<sharedVotingPower>0</sharedVotingPower>
<soleDispositivePower>7079234</soleDispositivePower>
<sharedDispositivePower>0</sharedDispositivePower>
</reportingPersonBeneficiallyOwnedNumberOfShares>
<reportingPersonBeneficiallyOwnedAggregateNumberOfShares>7079234</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
<aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
<classPercent>16.05</classPercent>
<typeOfReportingPerson>OO</typeOfReportingPerson>
</coverPageHeaderReportingPersonDetails>
<items>
<item1>
<issuerName>Solaris Oilfield Infrastructure, Inc.</issuerName>
<issuerPrincipalExecutiveOfficeAddress>9811 Katy Freeway, Suite 700, Houston, Texas, 77024</issuerPrincipalExecutiveOfficeAddress>
</item1>
<item2>
<filingPersonName>This statement is jointly filed by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"), Yorktown X Company LP, a Delaware limited partnership and the general partner of Yorktown X ("Yorktown X Company"), and Yorktown X Associates LLC, a Delaware limited liability company and the general partner of Yorktown X Company ("Yorktown X Associates", and collectively, with Yorktown X and Yorktown X Company, the "Reporting Persons").</filingPersonName>
<principalBusinessOfficeOrResidenceAddress>The principal business office address of Yorktown X, Yorktown X Company and Yorktown X Associates is 410 Park Avenue, 20th Floor, New York, New York 10022.</principalBusinessOfficeOrResidenceAddress>
<citizenship>Each of Yorktown X, Yorktown X Company and Yorktown X Associates is organized under the laws of the state of Delaware.</citizenship>
</item2>
<item3>
<notApplicableFlag>Y</notApplicableFlag>
</item3>
<item4>
<amountBeneficiallyOwned>Beneficial ownership of the Class A common stock, par value $0.01 per share ("Class A Common Stock"), of Solaris Oilfield Infrastructure, Inc., a Delaware corporation (the "Issuer") referred to herein is being reported hereunder solely because the reporting person directly owns or may be deemed to beneficially own 7,079,234 shares of Class B common stock of the Issuer ("Class B Common Stock") and 7,079,234 membership interests ("Solaris LLC Units") in Solaris Oilfield Infrastructure, LLC ("Solaris LLC"), which are exchangeable for shares of Class A Common Stock on a one-for-one basis, pursuant to the Second Amended and Restated Limited Liability Company Agreement of Solaris LLC. Neither the filing of this Schedule 13G nor any of its contents shall be deemed to constitute an admission by any reporting person that it is the beneficial owner of any of the securities referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed.</amountBeneficiallyOwned>
<classPercent>Based on 37,010,359 shares of Class A Common Stock of the Issuer issued and outstanding as of December 11, 2024 as reported in the Issuer's Prospectus filed with the Securities and Exchange Commission on December 12, 2024 and 7,079,234 shares of Class A Common Stock issuable upon the exchange of shares of Class B Common Stock together with Solaris LLC Units as described above.</classPercent>
<numberOfSharesPersonHas>
<solePowerOrDirectToVote>These securities are directly held by Yorktown Energy Partners X, L.P., a Delaware limited partnership. Yorktown X Company LP, a Delaware limited partnership, is the sole general partner of Yorktown X and Yorktown X Associates LLC, a Delaware limited liability company, is the sole general partner of Yorktown X Company. As a result, Yorktown X Company and Yorktown X Associates may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the shares owned by Yorktown X. Yorktown X Company and Yorktown X Associates disclaim beneficial ownership of the securities owned by Yorktown X in excess of its pecuniary interests therein.</solePowerOrDirectToVote>
</numberOfSharesPersonHas>
</item4>
<item5>
<notApplicableFlag>Y</notApplicableFlag>
</item5>
<item6>
<notApplicableFlag>Y</notApplicableFlag>
</item6>
<item7>
<notApplicableFlag>Y</notApplicableFlag>
</item7>
<item8>
<notApplicableFlag>Y</notApplicableFlag>
</item8>
<item9>
<notApplicableFlag>Y</notApplicableFlag>
</item9>
<item10>
<notApplicableFlag>Y</notApplicableFlag>
</item10>
</items>
<signatureInformation>
<reportingPersonName>Yorktown Energy Partners X, L.P.</reportingPersonName>
<signatureDetails>
<signature>/s/ Robert A. Signorino</signature>
<title>Robert A. Signorino/Managing Member of the General Partner of the General Partner</title>
<date>02/14/2025</date>
</signatureDetails>
</signatureInformation>
<signatureInformation>
<reportingPersonName>YORKTOWN X COMPANY LP</reportingPersonName>
<signatureDetails>
<signature>/s/ Robert A. Signorino</signature>
<title>Robert A. Signorino/Managing Member of the General Partner</title>
<date>02/14/2025</date>
</signatureDetails>
</signatureInformation>
<signatureInformation>
<reportingPersonName>YORKTOWN X ASSOCIATES LLC</reportingPersonName>
<signatureDetails>
<signature>/s/ Robert A. Signorino</signature>
<title>Robert A. Signorino/Managing Member</title>
<date>02/14/2025</date>
</signatureDetails>
</signatureInformation>
</formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
