EX-10.21



 Exhibit 10.21 

ADVANCED DRAINAGE SYSTEMS, INC. 

DIRECTOR STOCK AGREEMENT 

This Director Stock Agreement (this “Agreement”) is entered into as of
            , 201    , by and between Advanced Drainage Systems, Inc., a Delaware corporation (the “Company”), and
                    , a director of the Company (the “Grantee”). 

W I T N E S S E T H 
 WHEREAS,
pursuant to the provisions of the Company’s Non-Employee Director Compensation Plan (the “Plan”), the Company desires to award to the Grantee restricted shares of Common Stock, $.01 par value, of the Company (“Common
Stock”), in accordance with the provisions of the Plan, all on the terms and conditions hereinafter set forth; 
 WHEREAS, Grantee
wishes to accept said offer; and 
 WHEREAS, the parties hereto understand and agree that any terms used and not defined herein shall have
the same meanings as in the Plan. 
 NOW, THEREFORE, in consideration of the mutual covenants hereinafter set forth, and for other good and
valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: 
 §1.
Terms of Award. The Company hereby awards to the Grantee                     (    ) shares of Common Stock (the
“Shares”) in accordance with the terms of this Agreement. 
 §2. Provisions of Plan Controlling. The Grantee
specifically understands and agrees that the Shares issued under the Plan are being awarded to the Grantee pursuant to the Plan, copies of which Plan the Grantee acknowledges he or she has read, understands and by which he or she agrees to be bound.
The provisions of the Plan are incorporated herein by reference. In the event of a conflict between the terms and conditions of the Plan and this Agreement, the terms and conditions of the Plan shall control. 

§3. Vesting of Restricted Stock. 

(a) General. Subject to the terms and conditions of the Plan and this Agreement, and except as provided in §§3(b), 3(c), and
3(d) of this Agreement, one hundred percent (100%) of the Shares awarded hereunder shall vest and shall no longer be subject to a risk of forfeiture on [the first anniversary of the date of the grant of the Shares] (the “Vesting
Date”) provided that the Grantee has continuously served as a director from the date hereof through such Vesting Date. 
 (b) Death
of Grantee. If the Grantee shall die prior to the Vesting Date while serving as a director, the provisions of §3(a) shall have no force and effect, and the Shares awarded hereunder shall vest and shall no longer be subject to a risk of
forfeiture. 







 (c) Disability of Grantee. If the Grantee shall become permanently and totally disabled
within the meaning of §22(e)(3) of the Code prior to the Vesting Date while serving as a director, the provisions of §3(a) shall have no force and effect, and the Shares awarded hereunder shall vest and shall no longer be subject to a risk
of forfeiture. 
 (d) Other Termination of Service. If the Grantee ceases prior to the Vesting Date to serve as a director for any
reason other than death or permanent and total disability, the Shares awarded hereunder shall be forfeited to the Company for no consideration. 

§4. Dividend and Voting Rights. Grantee shall have the right to vote any Shares awarded hereunder and to receive any dividends
declared with respect to such Shares, provided that such voting and dividend rights shall lapse with respect to any Shares that are forfeited to the Company pursuant to §3 of this Agreement. 

§5. Additional Shares. 

(a) If the Company shall pay a stock dividend or declare a stock split on or with respect to any of its Common Stock, or otherwise distribute
securities of the Company to the holders of its Common Stock, the number of shares of stock or other securities of the Company issued with respect to the Shares then subject to the restrictions contained in this Agreement shall be added to the
Shares subject to this Agreement. If the Company shall distribute to its stockholders shares of stock of another corporation, the shares of stock of such other corporation distributed with respect to the Shares then subject to the restrictions
contained in this Agreement shall be added to the Shares subject to this Agreement. 
 (b) If the outstanding shares of Common Stock of the
Company shall be subdivided into a greater number of shares or combined into a smaller number of shares, or in the event of a reclassification of the outstanding shares of Common Stock of the Company, or if the Company shall be a party to a merger,
consolidation or capital reorganization, there shall be substituted for the Shares then subject to the restrictions contained in this Agreement such amount and kind of securities as are issued in such subdivision, combination, reclassification,
merger, consolidation or capital reorganization in respect of the Shares subject to this Agreement. 
 §6. Legends. All
certificates representing the Shares to be issued to the Grantee pursuant to this Agreement shall have endorsed thereon legends substantially as follows: 

“The shares represented by this certificate are subject to restrictions set forth in a Director Stock Agreement dated
             , 201     with the Company, a copy of which Agreement is available for inspection at the offices of the Company or will be made available upon
request.” 
 “The shares represented by this certificate have been taken for investment and they may not be sold or otherwise
transferred by any person, including a pledgee, unless (1) either (a) a Registration Statement with respect to such shares shall be effective under the Securities Act of 1933, as amended, or (b) the Company shall have received an
opinion 

  
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of counsel satisfactory to it that an exemption from registration under such Act is then available, and (2) there shall have been compliance with all applicable state securities laws.”

 §7. Investment Intent. The Grantee represents and warrants to the Company that the Shares are being acquired for the
Grantee’s own account, for investment, and not with a view to, or for sale in connection with, the distribution of any such Shares. 

§8. Notices. Any notices required or permitted by the terms of this Agreement or the Plan shall be given by recognized courier
service, facsimile, registered or certified mail, return receipt requested, addressed as follows: 
 If to the Company: 

Advanced Drainage Systems, Inc. 

4640 Trueman Boulevard 
 Hilliard,
Ohio 43026 
 Attention: Corporate Secretary 

If to the Grantee: 

			
		
	  
	  	
	  
	  	


 or to such other address or addresses of which notice in the same manner has previously been given. Any such notice
shall be deemed to have been given upon the earlier of receipt, one (1) business day following delivery to a recognized courier service or three (3) business days following mailing by registered or certified mail. 

§9. Governing Law. This Agreement shall be construed and enforced in accordance with the laws of the State of Ohio. 

§10. Benefit of Agreement. Subject to the provisions of the Plan and the other provisions hereof, this Agreement shall be for the
benefit of and shall be binding upon the heirs, executors, administrators, successors and assigns of the parties hereto. 
 §11.
Entire Agreement. This Agreement, together with the Plan, embodies the entire agreement and understanding between the parties hereto with respect to the subject matter hereof and supersedes all prior oral or written agreements and
understandings relating to the subject matter hereof. No statement, representation, warranty, covenant or agreement not expressly set forth in this Agreement shall affect or be used to interpret, change or restrict, the express terms and provisions
of this Agreement, provided, however, in any event, this Agreement shall be subject to and governed by the Plan. 
 §12.
Modifications and Amendments. The terms and provisions of this Agreement may be modified or amended as provided in the Plan. 

  
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 §13. Waivers and Consents. The terms and provisions of this Agreement may be waived,
or consent for the departure therefrom granted, only by a written document executed by the party entitled to the benefits of such terms or provisions. No such waiver or consent shall be deemed to be or shall constitute a waiver or consent with
respect to any other terms or provisions of this Agreement, whether or not similar. Each such waiver or consent shall be effective only in the specific instance and for the purpose for which it was given, and shall not constitute a continuing waiver
or consent. 
 *    *    *    *    * 

IN WITNESS WHEREOF, the Company has caused this Agreement to be executed by a duly authorized officer, and the Grantee has hereunto set his or
her hand, all as of the day and year first above written. 
  

			
	ADVANCED DRAINAGE SYSTEMS, INC.
		
	By:	 	  

		 	Joseph A. Chlapaty, Chairman & Chief
		 	Executive Officer
	
	  

	[                    ]



  
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