<SEC-DOCUMENT>0001567619-18-007533.txt : 20181207
<SEC-HEADER>0001567619-18-007533.hdr.sgml : 20181207
<ACCEPTANCE-DATETIME>20181207193050
ACCESSION NUMBER:		0001567619-18-007533
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20181205
FILED AS OF DATE:		20181207
DATE AS OF CHANGE:		20181207

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			JPMORGAN CHASE & CO
		CENTRAL INDEX KEY:			0000019617
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38267
		FILM NUMBER:		181224608

	BUSINESS ADDRESS:	
		STREET 1:		270 PARK AVE
		STREET 2:		38TH FL
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		2122706000

	MAIL ADDRESS:	
		STREET 1:		270 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

	FORMER NAME:	
		FORMER CONFORMED NAME:	J P MORGAN CHASE & CO
		DATE OF NAME CHANGE:	20010102

	FORMER NAME:	
		FORMER CONFORMED NAME:	CHASE MANHATTAN CORP /DE/
		DATE OF NAME CHANGE:	19960402

	FORMER NAME:	
		FORMER CONFORMED NAME:	CHEMICAL BANKING CORP
		DATE OF NAME CHANGE:	19920703

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Ribbon Communications Inc.
		CENTRAL INDEX KEY:			0001708055
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER INTEGRATED SYSTEMS DESIGN [7373]
		IRS NUMBER:				821669692
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		4 TECHNOLOGY PARK DRIVE
		CITY:			WESTFORD
		STATE:			MA
		ZIP:			01886
		BUSINESS PHONE:		978-614-8090

	MAIL ADDRESS:	
		STREET 1:		4 TECHNOLOGY PARK DRIVE
		CITY:			WESTFORD
		STATE:			MA
		ZIP:			01886

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Sonus Networks, Inc.
		DATE OF NAME CHANGE:	20171027

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Solstice Sapphire Investments, Inc.
		DATE OF NAME CHANGE:	20170531
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-12-05</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001708055</issuerCik>
        <issuerName>Ribbon Communications Inc.</issuerName>
        <issuerTradingSymbol>RBBN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000019617</rptOwnerCik>
            <rptOwnerName>JPMORGAN CHASE &amp; CO</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>270 PARK AVE, 10TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-12-05</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1142007</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>6.83</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>49940222</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">On December 5, 2018, JPMC Heritage Parent LLC (&quot;JPMC Heritage Parent&quot;), an indirectly wholly-owned subsidiary of the Reporting Person, acquired the 1,142,007 shares of Common Stock of the Issuer previously held by OEP III Co-Investors, LP.</footnote>
        <footnote id="F2">JPMC Heritage Parent is the record holder of 1,142,007 shares of Common Stock, OEP II Partners Co-Invest, L.P. (&quot;OEP II Partners Co-Invest&quot;) is the record holder of 1,749,504 shares of Common Stock, and Heritage PE (OEP) III, L.P. (&quot;Heritage III&quot;) is the record holder of 47,048,711 shares of Common Stock. The Reporting Person is a publicly traded entity listed on the New York Stock Exchange, which is the sole member of JPMorgan Holdings LLC, which is the sole member of Banc One Financial LLC, which is the sole member of OEP Holdings LLC, which is the sole member of JPMC Heritage Parent LLC, which is the general partner of OEP General Partner III L.P., which is the general partner of Heritage III. Additionally, JPMC Heritage Parent is the sole member of OEP Co-Investors Management III, Ltd., which is the general partner of OEP III Partners Co-Investors, L.P.</footnote>
        <footnote id="F3">As such, the Reporting Person may be deemed to have or share beneficial ownership of the Common Stock held directly by Heritage III and JPMC Heritage Parent. OEP II Partners Co-Invest is subject to certain contractual agreements and statutory obligations to acquire and vote shares side-by-side with Heritage III. By virtue of these agreements and obligations, the Reporting Person may be deemed to have or share beneficial ownership over the shares held directly by OEP II Partners Co-Invest. Notwithstanding the above, the Reporting Person does not directly or indirectly own any interest in OEP II Partners Co-Invest. The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>JPMORGAN CHASE &amp; CO., By: /s/ Michael T. Lees, Name: Michael T. Lees, Title:  Executive Director</signatureName>
        <signatureDate>2018-12-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
