<?xml version="1.0" encoding="us-ascii"?><InstanceReport xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><Version>2.4.0.8</Version><ReportLongName>115 - Disclosure - Litigation</ReportLongName><DisplayLabelColumn>true</DisplayLabelColumn><ShowElementNames>false</ShowElementNames><RoundingOption /><HasEmbeddedReports>false</HasEmbeddedReports><Columns><Column FlagID="0"><Id>1</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

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</LabelSeparator><Level>1</Level><ElementName>merr_LitigationAbstract</ElementName><ElementPrefix>merr_</ElementPrefix><IsBaseElement>false</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText /><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat></Cell></Cells><ElementDataType>xbrli:stringItemType</ElementDataType><SimpleDataType>string</SimpleDataType><IsTotalLabel>false</IsTotalLabel><UnitID>0</UnitID><Label>Litigation [Abstract]</Label></Row><Row FlagID="0"><Id>2</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><Level>2</Level><ElementName>merr_LitigationTextBlock</ElementName><ElementPrefix>merr_</ElementPrefix><IsBaseElement>false</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><PreferredLabelRole>verboseLabel</PreferredLabelRole><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="P01_01_2013To06_30_2013" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText>              &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif "&gt;  &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &lt;b&gt;9. Litigation&lt;/b&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &lt;b&gt;&amp;#160;&lt;/b&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &lt;font style="FONT-VARIANT: small-caps"&gt;&lt;b&gt;&lt;i&gt;Del Biaggio/Cacchione  Matters&lt;/i&gt;&lt;/b&gt;&lt;/font&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; MARGIN: 0pt 0px 0pt 0.35in; FONT: 10pt Times New Roman, Times, Serif"&gt;  &amp;#160;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; TEXT-INDENT: 0.5in; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &lt;font style="COLOR: black"&gt;A number of lawsuits were filed against  the Company and MC (collectively, &amp;#8220;Merriman Parties&amp;#8221;),  in connection with the actions of William Del Biaggio III (Del  Biaggio), a former customer of MC, and David Scott Cacchione  (Cacchione), a former retail broker of MC.&lt;/font&gt; Del Biaggio and  Cacchione pleaded guilty to securities fraud and were subsequently  imprisoned. &lt;font style="COLOR: black"&gt;The majority of these  lawsuits have been settled or dismissed. The remaining lawsuits  against the Merriman Parties in connection with Cacchione&amp;#8217;s  activities are as follows:&lt;/font&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; MARGIN: 0pt 0px 0pt 0.35in; FONT: 10pt Times New Roman, Times, Serif"&gt;  &lt;b&gt;&amp;#160;&lt;/b&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &lt;font style="FONT-VARIANT: small-caps"&gt;&lt;b&gt;&lt;i&gt;Trustee for the  Bankruptcy estates of William James &amp;#8220;Boots&amp;#8221; Del Biaggio  and BDB Management, LLC v. Merriman Capital, Inc. and D. Jonathan  Merriman&lt;/i&gt;&lt;/b&gt;&lt;/font&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; MARGIN: 0pt 0px 0pt 0.35in; FONT: 10pt Times New Roman, Times, Serif"&gt;  &amp;#160;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-INDENT: 0.5in; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  On September 2, 2011, a complaint was filed in FINRA arbitration  against MC and D. Jonathan Merriman by the bankruptcy estates of  William James &amp;#8220;Boots&amp;#8221; Del Biaggio III and BDB  Management, LLC. The complaint alleges various causes of action  arising from alleged unauthorized trading and cross  collateralization in plaintiff&amp;#8217;s accounts at MC and seeks  damages of $&lt;font style=" FONT-SIZE: 10pt"&gt;7.2&lt;/font&gt; million. MC  believes that it has valid defenses and intends to contest these  claims vigorously. On November 2, 2011, MC filed an answer to the  complaint on its behalf and D. Jonathan Merriman&amp;#8217;s, denying  the allegations and asserting, among other things, the right to set  off damages caused to the Merriman Parties by Del Biaggio, who is  currently serving an eight year sentence in federal prison for  fraud, in an amount well in excess of plaintiff&amp;#8217;s alleged  damages. An arbitration hearing was set for August 2012 but was  postponed at plaintiff&amp;#8217;s request. A new hearing date was set  for February 2013 but was postponed at defendant&amp;#8217;s request.  It is currently scheduled for August 19, 2013. Since the Company  &lt;font style="COLOR: black"&gt;believes that the likelihood of an  unfavorable outcome in the case is remote, management has not  provided an accrual for this lawsuit as of June 30,  2013.&lt;/font&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &lt;b&gt;&amp;#160;&lt;/b&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &lt;font style="FONT-VARIANT: small-caps"&gt;&lt;b&gt;&lt;i&gt;Khachaturian, Peterson  and Salvi v. Merriman Capital, Inc. and Merriman Holdings,  Inc.&lt;/i&gt;&lt;/b&gt;&lt;/font&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; MARGIN: 0pt 0px 0pt 0.35in; FONT: 10pt Times New Roman, Times, Serif"&gt;  &lt;font style="FONT-VARIANT: small-caps"&gt;&lt;i&gt;&amp;#160;&lt;/i&gt;&lt;/font&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-INDENT: 0.5in; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  Complaints were filed in the San Francisco County Superior Court,  California by Henry Khachaturian in January 2011, by Chuck Peterson  in February 2010 and by Dolores Salvi in October 2010. The  complaints also named as defendants the Company&amp;#8217;s officers  and former officers D.&amp;#160;Jonathan Merriman, Gregory Curhan, and  Robert Ford. Messrs. Curhan and Ford were dropped from the case in  January 2011. The complaints were consolidated into one case in  March 2011. The complaints allege that plaintiffs were convinced by  the Company to purchase shares of a small, risky stock in which MC  held a position. It further alleges that the Company did not permit  plaintiffs to sell the shares when the stock&amp;#8217;s price fell.  The complaints seek unspecified compensatory and punitive damages.  No trial date has been set. Since &lt;font style="COLOR: black"&gt;the  Company believes that the likelihood of an unfavorable outcome in  the case is remote, management has not provided an accrual for this  lawsuit as of June 30, 2013.&lt;/font&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &lt;font style="FONT-VARIANT: small-caps"&gt;&lt;b&gt;&lt;i&gt;  &amp;#160;&lt;/i&gt;&lt;/b&gt;&lt;/font&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &lt;font style="FONT-VARIANT: small-caps"&gt;&lt;b&gt;&lt;i&gt;Howard v. Chanticleer  Holdings, Inc. Et Al&lt;/i&gt;&lt;/b&gt;&lt;/font&gt;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; MARGIN: 0pt 0px 0pt 0.35in; FONT: 10pt Times New Roman, Times, Serif"&gt;  &amp;#160;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; TEXT-INDENT: 0.5in; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  A complaint was filed in federal court for the Southern District of  Florida on October 15, 2012 by Francis Howard against Chanticleer  Holdings, Inc., certain of its officers, Merriman Capital, Inc.,  Dawson James Securities, Inc., and Creason &amp;amp; Associates  P.L.L.C. Plaintiff alleged violations of the Securities Act of 1933  in connection with a public offering by Chanticleer Holdings, Inc.  and sought class action status and unspecified damages. On May 17,  2013, plaintiff agreed to dismiss Merriman Capital, Inc. and Dawson  James Securities from the case. On May 22, 2013 the complaint  against Merriman Capital, Inc. and Dawson James Securities was  dismissed by the Court.&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-ALIGN: justify; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  &amp;#160;&lt;/div&gt;    &lt;div style="clear:both; FONT-FAMILY:Times New Roman;FONT-SIZE: 10pt;TEXT-INDENT: 0.5in; MARGIN: 0pt 0px; FONT: 10pt Times New Roman, Times, Serif"&gt;  Additionally, from time to time, the Company is involved in  ordinary routine litigation incidental to our business.&lt;/div&gt;  &lt;/div&gt;        </NonNumbericText><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat></Cell></Cells><ElementDataType>nonnum:textBlockItemType</ElementDataType><SimpleDataType>na</SimpleDataType><ElementDefenition>The entire disclosure pertaining to litigation.</ElementDefenition><ElementReferences>No definition available.</ElementReferences><IsTotalLabel>false</IsTotalLabel><UnitID>0</UnitID><Label>Litigation [Text Block]</Label></Row></Rows><Footnotes /><IsEquityReport>false</IsEquityReport><ReportName>Litigation</ReportName><MonetaryRoundingLevel>UnKnown</MonetaryRoundingLevel><SharesRoundingLevel>UnKnown</SharesRoundingLevel><PerShareRoundingLevel>UnKnown</PerShareRoundingLevel><ExchangeRateRoundingLevel>UnKnown</ExchangeRateRoundingLevel><HasCustomUnits>true</HasCustomUnits><IsEmbedReport>false</IsEmbedReport><IsMultiCurrency>false</IsMultiCurrency><ReportType>Sheet</ReportType><RoleURI>http://www.merrimanco.com/role/Litigation</RoleURI><NumberOfCols>1</NumberOfCols><NumberOfRows>2</NumberOfRows></InstanceReport>
