-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 VLNcs0aap6ikrr2HnqHLmS5yGAnn2sWofEw+PGewGy40/XfSU2kIZB4Tioz4TVLj
 MrY6E6DdStdeRn8lTTNCMg==

<SEC-DOCUMENT>0001127602-10-012123.txt : 20100427
<SEC-HEADER>0001127602-10-012123.hdr.sgml : 20100427
<ACCEPTANCE-DATETIME>20100427145558
ACCESSION NUMBER:		0001127602-10-012123
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100423
FILED AS OF DATE:		20100427
DATE AS OF CHANGE:		20100427

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BARDENWERPER WALTER W
		CENTRAL INDEX KEY:			0001213375

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34594
		FILM NUMBER:		10773093

	MAIL ADDRESS:	
		STREET 1:		901 N GLEBE ROAD
		CITY:			ARLINGTON
		STATE:			VA
		ZIP:			22203

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Towers Watson & Co.
		CENTRAL INDEX KEY:			0001470215
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MANAGEMENT CONSULTING SERVICES [8742]
		IRS NUMBER:				260676603
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		875 THIRD AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		(212) 725-7550

	MAIL ADDRESS:	
		STREET 1:		875 THIRD AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	JUPITER SATURN HOLDING CO
		DATE OF NAME CHANGE:	20090812
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-04-23</periodOfReport>

    <issuer>
        <issuerCik>0001470215</issuerCik>
        <issuerName>Towers Watson &amp; Co.</issuerName>
        <issuerTradingSymbol>TW</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001213375</rptOwnerCik>
            <rptOwnerName>BARDENWERPER WALTER W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>875 THIRD AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>VP, Sec. and General Counsel</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-04-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>6666</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>48.08</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>58726</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">All sales on this Form occurred pursuant to a Rule 10b5-1 Trading Plan entered into by Mr. Bardenwerper on March 4, 2010. This transaction was executed in multiple trades at prices ranging from $47.74 to $48.50. The price reported above reflects the weighted average sale  price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Karl Chen, attorney-in-fact for Mr. Bardenwerper</signatureName>
        <signatureDate>2010-04-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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