<SEC-DOCUMENT>0000899243-16-032388.txt : 20161027
<SEC-HEADER>0000899243-16-032388.hdr.sgml : 20161027
<ACCEPTANCE-DATETIME>20161027180916
ACCESSION NUMBER:		0000899243-16-032388
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20161027
FILED AS OF DATE:		20161027
DATE AS OF CHANGE:		20161027

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKLINE, INC.
		CENTRAL INDEX KEY:			0001666134
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				463354276
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		21300 VICTORY BOULEVARD
		STREET 2:		12TH FLOOR
		CITY:			WOODLAND HILLS
		STATE:			CA
		ZIP:			91367
		BUSINESS PHONE:		818-223-9008

	MAIL ADDRESS:	
		STREET 1:		21300 VICTORY BOULEVARD
		STREET 2:		12TH FLOOR
		CITY:			WOODLAND HILLS
		STATE:			CA
		ZIP:			91367

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Brennan John
		CENTRAL INDEX KEY:			0001297231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37924
		FILM NUMBER:		161956544

	MAIL ADDRESS:	
		STREET 1:		C/O BLACKLINE, INC.
		STREET 2:		21300 VICTORY BLVD., 12TH FLOOR
		CITY:			WOODLAND HILLS
		STATE:			CA
		ZIP:			91367
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc3.xml
<DESCRIPTION>FORM 3 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2016-10-27</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001666134</issuerCik>
        <issuerName>BLACKLINE, INC.</issuerName>
        <issuerTradingSymbol>BL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001297231</rptOwnerCik>
            <rptOwnerName>Brennan John</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SILVER LAKE</rptOwnerStreet1>
            <rptOwnerStreet2>2775 SAND HILL ROAD, SUITE 100</rptOwnerStreet2>
            <rptOwnerCity>MENLO PARK</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94025</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks>Exhibit 24.1 - Power of Attorney

Mr. Brennan is a Managing Director at Silver Lake Sumeru and is a member of the board of directors of BlackLine, Inc. (the &quot;Issuer&quot;).  Certain affiliates of Silver Lake Sumeru have filed a separate Form 3 reporting securities of the Issuer that they may be deemed to beneficially own.  Mr. Brennan disclaims beneficial ownership of any securities of the Issuer that may be deemed to be beneficially owned by affiliates of Silver Lake Sumeru.</remarks>

    <ownerSignature>
        <signatureName>/s/ John Brennan</signatureName>
        <signatureDate>2016-10-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
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<DOCUMENT>
<TYPE>EX-24.1
<SEQUENCE>2
<FILENAME>attachment1.htm
<DESCRIPTION>EX-24.1 DOCUMENT
<TEXT>
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<HEAD>
</HEAD>
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<PRE>
                                   Exhibit 24
                                   ----------

              LIMITED POWER OF ATTORNEY - SECURITIES LAW COMPLIANCE


     The undersigned, as an officer or director of BlackLine, Inc. (the
"Corporation"), hereby constitutes and appoints Karen M. King and Andrew J.
Schader, each the undersigned's true and lawful attorney-in-fact and agent to
complete and execute such Forms 144, Form ID, Forms 3, 4 and 5 and other forms
as such attorney shall in his or her discretion determine to be required or
advisable pursuant to Rule 144 promulgated under the Securities Act of 1933, as
amended, Section 16 of the Securities Exchange Act of 1934, as amended, and the
rules and regulations promulgated thereunder, or any successor laws and
regulations, as a consequence of the undersigned's ownership, acquisition or
disposition of securities of the Corporation, and to do all acts necessary in
order to file such forms with the Securities and Exchange Commission, any
securities exchange or national association, the Corporation and such other
person or agency as the attorney shall deem appropriate.

     The undersigned hereby ratifies and confirms all that said
attorneys-in-fact and agents shall do or cause to be done by virtue hereof. The
undersigned acknowledges that the foregoing attorneys-in-fact, in serving in
such capacity at the request of the undersigned, are not assuming, nor is the
Company assuming, any of the undersigned's responsibilities to comply with
Section 16 of the Securities Exchange Act of 1934 (as amended).

     This Limited Power of Attorney shall remain in full force and effect until
the undersigned is no longer required to file Forms 3, 4 and 5 with respect to
the undersigned's holdings of and transactions in securities issued by the
Corporation unless earlier revoked by the undersigned in a writing delivered to
the foregoing attorneys-in-fact.

     This Limited Power of Attorney is executed as of the date set forth below.

                                      Signature:      /s/ John D. Brennan
                                                 -------------------------------

                                      Print Name: John D. Brennan
                                                  ------------------------------

                                      Dated: October 19, 2016
                                             -----------------------------------


</PRE>
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