<SEC-DOCUMENT>0001140361-17-008163.txt : 20170217
<SEC-HEADER>0001140361-17-008163.hdr.sgml : 20170217
<ACCEPTANCE-DATETIME>20170217180024
ACCESSION NUMBER:		0001140361-17-008163
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20170215
FILED AS OF DATE:		20170217
DATE AS OF CHANGE:		20170217

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ADVANCED DRAINAGE SYSTEMS, INC.
		CENTRAL INDEX KEY:			0001604028
		STANDARD INDUSTRIAL CLASSIFICATION:	PLASTICS FOAM PRODUCTS [3086]
		IRS NUMBER:				510105665
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		4640 TRUEMAN BOULEVARD
		CITY:			HILLIARD
		STATE:			OH
		ZIP:			43026
		BUSINESS PHONE:		614-658-0050

	MAIL ADDRESS:	
		STREET 1:		4640 TRUEMAN BOULEVARD
		CITY:			HILLIARD
		STATE:			OH
		ZIP:			43026

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			AMERICAN SECURITIES LLC
		CENTRAL INDEX KEY:			0001475483
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36557
		FILM NUMBER:		17622740

	BUSINESS ADDRESS:	
		STREET 1:		299 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10171
		BUSINESS PHONE:		212 476-8000

	MAIL ADDRESS:	
		STREET 1:		299 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10171

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			American Securities Associates V, LLC
		CENTRAL INDEX KEY:			0001475484
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36557
		FILM NUMBER:		17622741

	BUSINESS ADDRESS:	
		STREET 1:		C/O AMERICAN SECURITIES LLC
		STREET 2:		THE CHRYSLER CENTER, 666 THIRD AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		212 476-8000

	MAIL ADDRESS:	
		STREET 1:		C/O AMERICAN SECURITIES LLC
		STREET 2:		THE CHRYSLER CENTER, 666 THIRD AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			American Securities Partners V (C) L.P.
		CENTRAL INDEX KEY:			0001475482
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36557
		FILM NUMBER:		17622742

	BUSINESS ADDRESS:	
		STREET 1:		C/O AMERICAN SECURITIES LLC
		STREET 2:		THE CHRYSLER CENTER, 666 THIRD AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		212 476-8000

	MAIL ADDRESS:	
		STREET 1:		C/O AMERICAN SECURITIES LLC
		STREET 2:		THE CHRYSLER CENTER, 666 THIRD AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			American Securities Partners V, L.P.
		CENTRAL INDEX KEY:			0001401897
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36557
		FILM NUMBER:		17622744

	BUSINESS ADDRESS:	
		STREET 1:		666 Third Avenue
		STREET 2:		29th Floor
		CITY:			New York
		STATE:			NY
		ZIP:			10017

	MAIL ADDRESS:	
		STREET 1:		666 Third Avenue
		STREET 2:		29th Floor
		CITY:			New York
		STATE:			NY
		ZIP:			10017

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ASP ADS Investco, LLC
		CENTRAL INDEX KEY:			0001614813
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36557
		FILM NUMBER:		17622745

	BUSINESS ADDRESS:	
		STREET 1:		C/O AMERICAN SECURITIES LLC
		STREET 2:		299 PARK AVENUE, 34TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10171
		BUSINESS PHONE:		212 476-8000

	MAIL ADDRESS:	
		STREET 1:		C/O AMERICAN SECURITIES LLC
		STREET 2:		299 PARK AVENUE, 34TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10171

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			American Securities Partners V(B), L.P.
		CENTRAL INDEX KEY:			0001401896
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36557
		FILM NUMBER:		17622743

	BUSINESS ADDRESS:	
		STREET 1:		666 Third Avenue
		STREET 2:		29th Floor
		CITY:			New York
		STATE:			NY
		ZIP:			10017

	MAIL ADDRESS:	
		STREET 1:		666 Third Avenue
		STREET 2:		29th Floor
		CITY:			New York
		STATE:			NY
		ZIP:			10017
</SEC-HEADER>
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<DESCRIPTION>FORM 4
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    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-02-15</periodOfReport>

    <notSubjectToSection16>true</notSubjectToSection16>

    <issuer>
        <issuerCik>0001604028</issuerCik>
        <issuerName>ADVANCED DRAINAGE SYSTEMS, INC.</issuerName>
        <issuerTradingSymbol>WMS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001614813</rptOwnerCik>
            <rptOwnerName>ASP ADS Investco, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AMERICAN SECURITIES LLC</rptOwnerStreet1>
            <rptOwnerStreet2>299 PARK AVE, 34TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10171</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
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    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001401897</rptOwnerCik>
            <rptOwnerName>American Securities Partners V, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AMERICAN SECURITIES LLC</rptOwnerStreet1>
            <rptOwnerStreet2>299 PARK AVE, 34TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
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    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001401896</rptOwnerCik>
            <rptOwnerName>American Securities Partners V(B), L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AMERICAN SECURITIES LLC</rptOwnerStreet1>
            <rptOwnerStreet2>299 PARK AVE, 34TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001475482</rptOwnerCik>
            <rptOwnerName>American Securities Partners V (C) L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AMERICAN SECURITIES LLC</rptOwnerStreet1>
            <rptOwnerStreet2>299 PARK AVE, 34TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001475484</rptOwnerCik>
            <rptOwnerName>American Securities Associates V, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AMERICAN SECURITIES LLC</rptOwnerStreet1>
            <rptOwnerStreet2>299 PARK AVE, 34TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001475483</rptOwnerCik>
            <rptOwnerName>AMERICAN SECURITIES LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>299 PARK AVE, 34TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10171</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-02-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3750000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>22.15</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3796908</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The shares are directly owned by ASP ADS Investco, LLC (&quot;ASPADS&quot;) and may also be deemed to be indirectly beneficially owned by: (i) American Securities Partners V, L.P., American Securities Partners V(B), L.P. and American Securities Partners V(C), L.P. (each, a &quot;Sponsor&quot;), the owners of membership interests in ASPADS; and (ii) American Securities Associates V, LLC (&quot;GP&quot;), the general partner of each Sponsor.  American Securities LLC provides investment advisory services to each Sponsor.</footnote>
        <footnote id="F2">Each Reporting Person disclaims beneficial ownership of the reported securities except to the extent of such Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.</footnote>
    </footnotes>

    <remarks>Exhibit 99.1 Joint Filer Information, incorporated herein by reference.</remarks>

    <ownerSignature>
        <signatureName>ASP ADS Investco, LLC By: ASP Manager Corp., its manager By: /s/ Michael G. Fisch, Michael G. Fisch, President</signatureName>
        <signatureDate>2017-02-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>American Securities Partners V, L.P. By: American Securities Associates V, LLC, its general partner By: /s/ Michael G. Fisch, Michael G. Fisch, as Managing Member</signatureName>
        <signatureDate>2017-02-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>American Securities Partners V(B), L.P. By: American Securities Associates V, LLC, its general partner By: /s/ Michael G. Fisch, Michael G. Fisch, as Managing Member</signatureName>
        <signatureDate>2017-02-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>American Securities Partners V(C), L.P. By: American Securities Associates V, LLC, its general partner By: /s/ Michael G. Fisch, Michael G. Fisch, as Managing Member</signatureName>
        <signatureDate>2017-02-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>American Securities Associates V, LLC By: /s/ Michael G. Fisch, Michael G. Fisch, as Managing Member</signatureName>
        <signatureDate>2017-02-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>American Securities LLC By: /s/ Michael G. Fisch, Michael G. Fisch, as President and Chief Executive Officer</signatureName>
        <signatureDate>2017-02-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
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<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>ex99_1.htm
<DESCRIPTION>EXHIBIT 99.1
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: right"><u>Exhibit 99.1</u></div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: center"><u>Joint Filer Information</u></div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Name of Joint Filer:</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">American Securities Partners V, L.P.</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Address of Joint Filer:</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">c/o American Securities LLC</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">299 Park Ave, 34th Floor</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">New York, NY&#160; 10171</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Relationship of Joint Filer to Issuer:</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">10% Owner</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Issuer Name and Ticker or Trading Symbol:</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Advanced Drainage Systems, Inc. [WMS]</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Date of Earliest Transaction</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Required to be Reported</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">(Month/Day/Year):</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">2/15/2017</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Designated Filer:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">ASP ADS Investco, LLC</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none; WIDTH: 50%">&#160; </td>
</tr>

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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Name of Joint Filer:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">American Securities Partners V(B), L.P.</div>
</td>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Address of Joint Filer:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">c/o American Securities LLC</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%"></td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">299 Park Ave, 34th Floor</div>
</td>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%"></td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">New York, NY&#160; 10171</div>
</td>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Relationship of Joint Filer to Issuer:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">10% Owner</div>
</td>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Issuer Name and Ticker or Trading Symbol:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Advanced Drainage Systems, Inc. [WMS]</div>
</td>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Date of Earliest Transaction</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Required to be Reported</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">(Month/Day/Year):</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">2/15/2017</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Designated Filer:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">ASP ADS Investco, LLC</div>
</td>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none; WIDTH: 50%">&#160; </td>
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<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Name of Joint Filer:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">American Securities Partners V(C), L.P.</div>
</td>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Address of Joint Filer:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">c/o American Securities LLC</div>
</td>
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<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%"></td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">299 Park Ave, 34th Floor</div>
</td>
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<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%"></td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">New York, NY&#160; 10171</div>
</td>
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<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Relationship of Joint Filer to Issuer:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">10% Owner</div>
</td>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Issuer Name and Ticker or Trading Symbol:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Advanced Drainage Systems, Inc. [WMS]</div>
</td>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Date of Earliest Transaction</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Required to be Reported</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">(Month/Day/Year):</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">2/15/2017</div>
</td>
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<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Designated Filer:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">ASP ADS Investco, LLC</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none; WIDTH: 50%">&#160; </td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none; WIDTH: 50%">&#160; </td>
</tr>
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<div>&#160;</div>

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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Name of Joint Filer:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">American Securities Associates V, LLC</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Address of Joint Filer:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">c/o American Securities LLC</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%"></td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">299 Park Ave, 34th Floor</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%"></td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">New York, NY&#160; 10171</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Relationship of Joint Filer to Issuer:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">10% Owner</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Issuer Name and Ticker or Trading Symbol:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Advanced Drainage Systems, Inc. [WMS]</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Date of Earliest Transaction</div>
</td>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Required to be Reported</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">(Month/Day/Year):</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">2/15/2017</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Designated Filer:</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">ASP ADS Investco, LLC</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Name of Joint Filer:</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">American Securities LLC</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Address of Joint Filer:</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">299 Park Ave, 34th Floor</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">New York, NY&#160; 10171</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Relationship of Joint Filer to Issuer:</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">10% Owner</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Issuer Name and Ticker or Trading Symbol:</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Advanced Drainage Systems, Inc. [WMS]</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Date of Earliest Transaction</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Required to be Reported</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
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<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">(Month/Day/Year):</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">2/15/2017</div>
</td>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">&#160;</td>
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<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">Designated Filer:</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; WIDTH: 50%">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">ASP ADS Investco, LLC</div>
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