EX-10.1



 Exhibit 10.1 

Clean Diesel Technologies, Inc. 
 4567 Telephone Road, Suite 100

 Ventura, California 93003 
 Gentlemen: 

The undersigned (the “Investor”) hereby confirms its agreement with Clean Diesel Technologies, Inc., a Delaware corporation (the
“Company”) as follows: 
 1. This Subscription Agreement, including the Terms and Conditions For Purchase of Securities
attached hereto as Annex I (collectively, (this “Agreement”) is made as of the date set forth below between the Company and the Investor. 

2. The Company has authorized the sale and issuance to certain investors of up to an aggregate of (i) 2,030,000 authorized and
unissued shares (the “Shares”) of its common stock, par value $0.01 per share (the “Common Stock”) and (ii) warrants (each, a “Warrant” and, collectively, the “Warrants”) to
purchase up to an aggregate of 812,000 shares of Common Stock (the “Warrant Shares”), in substantially the form attached hereto as Exhibit B. The Shares and the Warrants are being sold together as units (the
“Units”), each Unit consisting of one Share and 0.4 of one Warrant, each Warrant to purchase one share of Common Stock. Units will not be separately issued or certificated and the Investor will receive Shares and Warrants comprising
the Units which will be immediately separable and transferable upon issuance. Each Investor will receive Units at an initial public offering price of $3.40 per Unit (the “Purchase Price”). The Units, the Shares, the Warrants and the
Warrant Shares are collectively referred to herein as the “Securities”. 
 3. The offering and sale of the
Securities (the “Offering”) are being made pursuant to (1) an effective Registration Statement on Form S-3, File No. 333-181443 (the “Registration Statement”) filed by the Company with the Securities and
Exchange Commission (the “Commission”) (including the prospectus contained therein (the “Base Prospectus”), (2) if applicable, certain “free writing prospectuses” (as that term is defined in Rule 405 under
the Securities Act of 1933, as amended (the “Securities Act”)), that have been or will be filed with the Commission and delivered to the Investor on or prior to the date hereof (the “Issuer Free Writing
Prospectus”), containing certain supplemental information regarding the Securities, the terms of the Offering and the Company and (3) a Prospectus Supplement (the “Prospectus Supplement” and together with the Base
Prospectus, the “Prospectus”) containing certain supplemental information regarding the Securities and terms of the Offering that has been or will be filed with the Commission and delivered to the Investor (or made available to the
Investor by the filing by the Company of an electronic version thereof with the Commission). 
 4. The Company and the Investor agree
that at the Closing (as defined in Section 3.1 of Annex I), the Investor will purchase from the Company and the Company will issue and sell to the Investor the Units set forth below for the aggregate Purchase Price set forth below.
The Units shall be purchased pursuant to the Terms and Conditions for Purchase of Securities attached hereto as Annex I and incorporated herein by this reference as if fully set forth herein. The Investor acknowledges that the Offering
is not being underwritten by the placement agents (the “Placement Agents”) named in the Prospectus Supplement and that there is no minimum offering amount. 

5. In connection with the sale of the Securities, the Company agrees that it will not, for a period of ninety (90) days from the
date of the Prospectus, (the “Lock-Up Period”) without the prior written consent of the Investor, directly or indirectly offer, sell, assign, transfer, pledge, contract to sell, or otherwise dispose of, any shares of
Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock, other than: (i) the Company’s sale of the Securities in this Offering; (ii) the issuance of options or restricted stock units to acquire
Common Stock pursuant to the Company’s stock incentive plan or other employee benefit plans as such plans are in existence on the date hereof and described in the Prospectus; and (iii) the issuance of Common Stock pursuant to the valid
exercises or settlement of options, warrants, restricted stock units or rights outstanding on the date hereof and described in the Prospectus. The Company also agrees that during such period, the Company will not file any registration statement,
preliminary prospectus or prospectus, or any amendment or supplement thereto, under the Securities Act for any such transaction or which registers, or offers for sale, Common Stock or any securities convertible into or exercisable or exchangeable
for Common Stock, except for a registration statement on Form S-8 relating to employee benefit plans or as the Investor may otherwise consent. The Company hereby agrees that (i) if it issues an earnings release or material news, or if a
material event relating to the Company occurs, during the last 







 
seventeen (17) days of the Lock-Up Period, or (ii) if prior to the expiration of the Lock-Up Period, the Company announces that it will release earnings results during the sixteen
(16)-day period beginning on the last day of the Lock-Up Period, the restrictions imposed by this paragraph (k) or the letter shall continue to apply until the expiration of the eighteen (18)-day period beginning on the issuance of the
earnings release or the occurrence of the material news or material event. 
 6. The manner of settlement of the Shares included in
the Units purchased by the Investor shall be determined by such Investor as follows (check one): 

[            ] A. [        ] A. Delivery by crediting the
account of the Investor’s prime broker (as specified by such Investor on Exhibit A annexed hereto) with the Depository Trust Company (“DTC”) through its Deposit/Withdrawal At Custodian (“DWAC”) system, whereby
Investor’s prime broker shall initiate a DWAC transaction on the Closing Date using its DTC participant identification number, and released by American Stock Transfer & Trust Company, the Company’s transfer agent (the
“Transfer Agent”), at the Company’s direction. NO LATER THAN ONE (1) BUSINESS DAY AFTER THE EXECUTION OF THIS AGREEMENT BY THE INVESTOR AND THE COMPANY, THE INVESTOR SHALL: 

 

	 	(I)	DIRECT THE BROKER-DEALER AT WHICH THE ACCOUNT OR ACCOUNTS TO BE CREDITED WITH THE SHARES ARE MAINTAINED TO SET UP A DWAC INSTRUCTING THE TRANSFER AGENT TO CREDIT SUCH ACCOUNT OR ACCOUNTS WITH THE SHARES, AND


  

	 	(II)	REMIT BY WIRE TRANSFER THE AMOUNT OF FUNDS EQUAL TO THE AGGREGATE PURCHASE PRICE FOR THE UNITS BEING PURCHASED BY THE INVESTOR TO THE FOLLOWING ACCOUNT: 


[To be separately provided to the Investor] 

—OR— 

[            ] B. [        ] B. Delivery versus payment
(“DVP”) through DTC (i.e., on the Closing Date, the Company shall issue Shares registered in the Investor’s name and address as set forth below and released by the Transfer Agent directly to the account(s) at Roth Capital
Partners, LLC (“Roth”) or Craig-Hallum Capital Group LLC (“Craig-Hallum”) identified by the Investor; upon receipt of such Shares, Roth or Craig-Hallum, as the case may be, shall promptly electronically deliver such
Shares to the Investor, and simultaneously therewith payment shall be made by Roth or Craig-Hallum by wire transfer to the Company). NO LATER THAN ONE (1) BUSINESS DAY AFTER THE EXECUTION OF THIS AGREEMENT BY THE INVESTOR AND THE COMPANY,
THE INVESTOR SHALL: 
  

	 	(I)	NOTIFY ROTH OR CRAIG-HALLUM OF THE ACCOUNT OR ACCOUNTS AT ROTH OR CRAIG-HALLUM TO BE CREDITED WITH THE SHARES BEING PURCHASED BY SUCH INVESTOR, AND 


 

	 	(II)	CONFIRM THAT THE ACCOUNT OR ACCOUNTS AT ROTH OR CRAIG-HALLUM TO BE CREDITED WITH THE SHARES BEING PURCHASED BY THE INVESTOR HAVE A MINIMUM BALANCE EQUAL TO THE AGGREGATE PURCHASE PRICE FOR THE UNITS BEING PURCHASED
BY THE INVESTOR. 

 IT IS THE INVESTOR’S RESPONSIBILITY TO (A) MAKE THE NECESSARY WIRE TRANSFER OR CONFIRM THE PROPER
ACCOUNT BALANCE IN A TIMELY MANNER AND (B) ARRANGE FOR SETTLEMENT BY WAY OF DWAC OR DVP IN A TIMELY MANNER. IF THE INVESTOR DOES NOT DELIVER THE AGGREGATE PURCHASE PRICE FOR THE UNITS OR DOES NOT MAKE PROPER ARRANGEMENTS FOR SETTLEMENT IN A
TIMELY MANNER, THE SHARES AND THE WARRANTS COMPRISING THE UNITS MAY NOT BE DELIVERED AT CLOSING TO THE INVESTOR OR THE INVESTOR MAY BE EXCLUDED FROM THE CLOSING ALTOGETHER. 

7. The executed Warrants included in the Units purchased by the Investor shall be delivered to the Investor by mail, registered in such
names and sent to such address as specified by the Investor below. 

  
 2 








 8. The Investor represents that, except as set forth below, (a) it has had no
position, office or other material relationship within the past three years with the Company or persons known to it to be affiliates of the Company, (b) it is not a member of the Financial Industry Regulatory Authority, Inc.
(“FINRA”) or an Associated Person (as such term is defined under the FINRA’s NASD Membership and Registration Rules Section 1011) as of the Closing, and (c) neither the Investor nor any group of Investors (as
identified in a public filing made with the Commission) of which the Investor is a part in connection with the Offering, acquired, or obtained the right to acquire, 20% or more of the Common Stock (or securities convertible into or exercisable for
Common Stock) or the voting power of the Company on a post-transaction basis. Exceptions: 
  

					
		 	  
	 	

 (If no exceptions, write “none.” If left blank, response will be deemed to be “none.”)

 9. The Investor represents that it has received (or otherwise had made available to it by the filing by the Company of an
electronic version thereof with the Commission) the Base Prospectus, dated May 21, 2012, which is a part of the Company’s Registration Statement, the documents incorporated by reference therein and any free writing prospectus
(collectively, the “Disclosure Package”), prior to or in connection with the receipt of this Agreement. The Investor acknowledges that, prior to the delivery of this Agreement to the Company, the Investor will receive certain
additional information regarding the Offering, including pricing information (the “Offering Information”). Such information may be provided to the Investor by any means permitted under the Securities Act, including the Prospectus
Supplement, a free writing prospectus and oral communications. 
 10. No offer by the Investor to buy Shares and Warrants will be
accepted and no part of the Purchase Price will be delivered to the Company until the Investor has received the Offering Information and the Company has accepted such offer by countersigning a copy of this Agreement, and any such offer may be
withdrawn or revoked, without obligation or commitment of any kind, at any time prior to the Company (or Roth or Craig-Hallum on behalf of the Company) sending (orally, in writing or by electronic mail) notice of its acceptance of such offer. An
indication of interest will involve no obligation or commitment of any kind until the Investor has been delivered the Offering Information and this Agreement is accepted and countersigned by or on behalf of the Company. 

11. The Company acknowledges that the only material, non-public information relating to the Company or its subsidiaries that the
Company, its employees or agents has provided to the Investor in connection with the Offering prior to the date hereof is the existence of the Offering. 

  
 3 








 Number of Shares:
                                         

Purchase Price per Unit:
$                                         

Aggregate Purchase Price:
$                                         

Number of Warrant Shares subject to Warrants (Equal to Number of Shares multiplied by 0.40 and rounded down to the nearest whole number):
                                         

Please confirm that the foregoing correctly sets forth the agreement between us by signing in the space provided below for that purpose. 

 

			
	Dated as of:             , 2014
	
	  

	INVESTOR
		
	By:	 	  

		
	Print Name:	 	  

		
	Title:	 	  

		
	Address:	 	  

	  



 Agreed and Accepted 
 this
1st day of April, 2014: 
  

			
	CLEAN DIESEL TECHNOLOGIES, INC.
		
	By:	 	  

		 	Title


  
 4 








 ANNEX I 

TERMS AND CONDITIONS FOR PURCHASE OF SECURITIES 

1. Authorization and Sale of the Securities. Subject to the terms and conditions of this Agreement, the Company has authorized the sale
of the Securities. 
 2. Agreement to Sell and Purchase the Securities; Placement Agents. 

2.1 At the Closing (as defined in Section 3.1), the Company will sell to the Investor, and the Investor will purchase from
the Company, upon the terms and conditions set forth herein, the number of Units set forth on the last page of the Agreement to which these Terms and Conditions for Purchase of Securities are attached as Annex I (the “Signature
Page”) for the aggregate purchase price therefor set forth on the Signature Page. 
 2.2 The Company proposes to enter into
substantially this same form of Subscription Agreement with certain other investors (the “Other Investors”) and expects to complete sales of Units to them. The Investor and the Other Investors are hereinafter sometimes collectively
referred to as the “Investors,” and this Agreement and the Subscription Agreements executed by the Other Investors are hereinafter sometimes collectively referred to as the “Agreements.” 

2.3 Investor acknowledges that the Company has agreed to pay Roth Capital Partners, LLC and Craig-Hallum Capital Group LLC
(collectively, the “Placement Agents”) a fee (the “Placement Fee”) and to reimburse the Placement Agents for certain expenses in respect of the sale of the Units to the Investor. 

2.4 The Company has entered into a Placement Agent Agreement, dated the date hereof, (the “Placement Agreement”), with
the Placement Agents that contains certain representations, warranties, covenants and agreements of the Company that may be relied upon by the Investor, which shall be a third party beneficiary thereof. The Company confirms that neither it nor any
other Person acting on its behalf has provided the Investor or their agents or counsel with any information that constitutes or could reasonably be expected to constitute material, nonpublic information, except as will be disclosed in the Prospectus
and/or in the Company’s Form 8-K to be filed with the Commission in connection with the Offering. The Company understands and confirms that the Investor will rely on the foregoing representations in effecting transactions in securities of the
Company. 
 3. Closings and Delivery of the Securities and Funds. 

3.1 Closing. The completion of the purchase and sale of the Units (the “Closing”) shall occur at a place and
time (the “Closing Date”) to be specified by the Company and the Placement Agents, and of which the Investors will be notified in advance by the Placement Agents, in accordance with Rule 15c6-l promulgated under the Securities
Exchange Act of 1934, as amended (the “Exchange Act”). At the Closing, (a) the Company shall cause American Stock Transfer & Trust Company, the Company’s “Transfer Agent”, to deliver to the Investor the
number of Shares included in the Units purchased by the Investor as set forth on the Signature Page registered in the name of the Investor or, if so indicated on the Investor Questionnaire attached hereto as Exhibit A, in the name of a
nominee designated by the Investor, (b) the Company shall cause to be delivered to the Investor a warrant certificate for the number of Warrants included in the Units purchased by the Investor as set forth on the Signature Page and (c) the
aggregate purchase price for the Units being purchased by the Investor will be delivered by or on behalf of the Investor to the Company. 

3.2 Conditions to the Obligations of the Parties. 

(a) Conditions to the Company’s Obligations. The Company’s obligation to issue and sell the Units to
the Investor shall be subject to: (i) the receipt by the Company of the purchase price for the Units being purchased hereunder as set forth on the Signature Page and (ii) the accuracy of the representations and warranties made by the
Investor and the fulfillment of those undertakings of the Investor to be fulfilled prior to the Closing Date. 
 (b)
Conditions to the Investor’s Obligations. The Investor’s obligation to purchase the Units will be subject to the accuracy of the representations and warranties made by the Company and the fulfillment of those undertakings of
the Company to be fulfilled prior to the Closing 

  
 5 








 
Date, including without limitation, those contained in the Placement Agreement, and to the condition that the Placement Agents shall not have: (a) terminated the Placement Agreement pursuant
to the terms thereof or (b) determined that the conditions to the closing in the Placement Agreement have not been satisfied. The Investor’s obligations are expressly not conditioned on the purchase by any or all of the Other Investors of
the Units that they have agreed to purchase from the Company. The Investor understands and agrees that, in the event that the Placement Agents in their sole discretion determine that the conditions to closing in the Placement Agreement have not been
satisfied or if the Placement Agreement may be terminated for any other reason permitted by such Placement Agreement, then the Placement Agents may, but shall not be obligated to, terminate such Agreement, which shall have the effect of terminating
this Subscription Agreement pursuant to Section 14 below. 
 3.3 Delivery of Funds. 

(a) DWAC Delivery. If the Investor elects to settle the Shares included in the Units purchased by such Investor through
DTC’s Deposit/Withdrawal at Custodian (“DWAC”) delivery system, no later than one (1) business day after the execution of this Agreement by the Investor and the Company, the Investor shall remit by wire
transfer the amount of funds equal to the aggregate purchase price for the Units being purchased by the Investor to the following account designated by the Company: 

[To be separately provided to the Investor] 

(b) Delivery Versus Payment through The Depository Trust Company. If the Investor elects to settle the Shares included
in the Units purchased by such Investor by delivery versus payment through DTC, no later than one (1) business day after the execution of this Agreement by the Investor and the Company, the Investor shall confirm that the account
or accounts at either of the Placement Agents to be credited with the Shares being purchased by the Investor have a minimum balance equal to the aggregate purchase price for the Units being purchased by the Investor. 

3.4 Delivery of Shares. 

(a) DWAC Delivery. If the Investor elects to settle the Shares included in the Units purchased by such Investor through
DTC’s DWAC delivery system, no later than one (1) business day after the execution of this Agreement by the Investor and the Company, the Investor shall direct the broker-dealer at which the account or accounts to be credited
with the Shares being purchased by such Investor are maintained, which broker/dealer shall be a DTC participant, to set up a DWAC instructing the Transfer Agent to credit such account or accounts with the Shares. Such DWAC instruction shall indicate
the settlement date for the deposit of the Shares, which date shall be provided to the Investor by the Placement Agents. Upon the closing of the Offering, the Company shall direct the Transfer Agent to credit the Investor’s account or accounts
with the Shares pursuant to the information contained in the DWAC. 
 (b) Delivery Versus Payment through The Depository
Trust Company. If the Investor elects to settle the Shares included in the Units purchased by such Investor by delivery versus payment through DTC, no later than one (1) business day after the execution of this Agreement by the
Investor and the Company, the Investor shall notify either of the Placement Agents of the account or accounts at such Placement Agent to be credited with the Shares being purchased by such Investor. On the Closing Date, the Company shall
deliver the Shares to the Investor through DTC directly to the account(s) at such Placement Agent identified by Investor. Upon receipt of such Shares, such Placement Agent shall promptly electronically deliver such Shares to the Investor, and
simultaneously therewith payment shall be made by such Placement Agent by wire transfer to the Company. 
 4. Representations, Warranties
and Covenants of the Investor. 
 The Investor acknowledges, represents and warrants to, and agrees with, the Company and the Placement
Agents that: 
 4.1 The Investor (a) is knowledgeable, sophisticated and experienced in making, and is qualified to make
decisions with respect to, investments in securities presenting an investment decision like that involved in the purchase of the Securities, including investments in securities issued by the Company and


  
 6 








 
investments in comparable companies, (b) has answered all questions on the Signature Page and the Investor Questionnaire and the answers thereto are true and correct as of the date hereof
and will be true and correct as of the Closing Date and (c) in connection with its decision to purchase the Shares and the Warrants set forth on the Signature Page, has received and is relying only upon the Disclosure Package and the documents
incorporated by reference therein and the Offering Information. 
 4.2 (a) No action has been or will be taken in any jurisdiction
outside the United States by the Company or the Placement Agents that would permit an offering of the Securities, or possession or distribution of offering materials in connection with the issue of the Securities in any jurisdiction outside the
United States where action for that purpose is required, (b) if the Investor is outside the United States, it will comply with all applicable laws and regulations in each foreign jurisdiction in which it purchases, offers, sells or delivers
Securities or has in its possession or distributes any offering material, in all cases at its own expense and (c) neither of the Placement Agents is authorized to make and has not made any representation, disclosure or use of any information in
connection with the issue, placement, purchase and sale of the Securities, except as set forth or incorporated by reference in the Base Prospectus, the Prospectus Supplement or any free writing prospectus. 

4.3 (a) The Investor has full right, power, authority and capacity to enter into this Agreement and to consummate the transactions
contemplated hereby and has taken all necessary action to authorize the execution, delivery and performance of this Agreement, and (b) this Agreement constitutes a valid and binding obligation of the Investor enforceable against the Investor in
accordance with its terms, except as enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar laws affecting creditors’ and contracting parties’ rights generally and except as enforceability
may be subject to general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law) and except as to the enforceability of any rights to indemnification or contribution that may be violative
of the public policy underlying any law, rule or regulation (including any federal or state securities law, rule or regulation). 
 4.4
The Investor understands that nothing in this Agreement, the Prospectus, the Disclosure Package, the Offering Information or any other materials presented to the Investor in connection with the purchase and sale of the Units constitutes legal,
tax or investment advice. The Investor has consulted such legal, tax and investment advisors and made such investigation as it, in its sole discretion, has deemed necessary or appropriate in connection with its purchase of Units. The Investor also
understands that there is no established public trading market for the Warrants being offered in the Offering, and that the Company does not expect such a market to develop. In addition, the Company does not intend to apply for listing of the
Warrants on any securities exchange or other trading market. The Investor understands that without an active market, the liquidity of the Warrants will be limited. 

4.5 The Investor will maintain the confidentiality of all information acquired as a result of the transactions contemplated hereby
prior to the public disclosure of that information by the Company in accordance with Section 13 of this Annex. 
 4.6 Since the
time at which either of the Placement Agents first contacted such Investor about the Offering, the Investor has not disclosed any information regarding the Offering to any third parties (other than its legal, accounting and other advisors) and has
not engaged in any purchases or sales of the securities of the Company (including, without limitation, any Short Sales (as defined herein) involving the Company’s securities). The Investor covenants that it will not engage in any purchases or
sales of the securities of the Company (including Short Sales) prior to the time that the transactions contemplated by this Agreement are publicly disclosed. The Investor agrees that it will not use any of the Securities acquired pursuant to this
Agreement to cover any short position in the Common Stock if doing so would be in violation of applicable securities laws. For purposes hereof, “Short Sales” include, without limitation, all “short sales” as defined in Rule 200
promulgated under Regulation SHO under the Exchange Act, whether or not against the box, and all types of direct and indirect stock pledges, forward sales contracts, options, puts, calls, short sales, swaps, “put equivalent positions” (as
defined in Rule 16a-1(h) under the Exchange Act) and similar arrangements (including on a total return basis), and sales and other transactions through non-U.S. broker dealers or foreign regulated brokers. 

5. Survival of Representations, Warranties and Agreements; Third Party Beneficiary. Notwithstanding any investigation made by any party
to this Agreement or by either of the Placement Agents, all covenants, agreements, representations and warranties made by the Company and the Investor herein will survive the execution of this Agreement, the delivery to the Investor of the Shares
and Warrants comprising the Units being purchased and the payment therefor. The Placement Agents shall be third party beneficiaries with respect to the representations, warranties and agreements of the Investor in Section 4 hereof. 

  
 7 








 6. Notices. All notices, requests, consents and other communications hereunder will be in
writing, will be mailed (a) if within the domestic United States by first-class registered or certified airmail, or nationally recognized overnight express courier, postage prepaid, or by facsimile or (b) if delivered from outside the
United States, by International Federal Express or facsimile, and will be deemed given (i) if delivered by first-class registered or certified mail domestic, three business days after so mailed, (ii) if delivered by nationally recognized
overnight carrier, one business day after so mailed, (iii) if delivered by International Federal Express, two business days after so mailed and (iv) if delivered by facsimile, upon electronic confirmation of receipt and will be delivered
and addressed as follows: 
 (a) if to the Company, to: 

Clean Diesel Technologies, Inc. 

4567 Telephone Road, Suite 100 

Ventura, California 93003 

Attention: Nikhil Mehta, Chief Financial Officer 

Fax: (805) 639-9466 

with a copy (which shall not constitute notice) to: 

DLA Piper LLP (US) 
 2525 East
Camelback Road, Suite 1000 
 Phoenix, Arizona 85016 

Attention: Steven Pidgeon, Esq. 

Fax: (480) 646-5524 

(b) if to the Investor, at its address on the Signature Page hereto, or at such other address or addresses as may have been
furnished to the Company in writing. 
 7. Changes. This Agreement may not be modified or amended except pursuant to an instrument in
writing signed by the Company and the Investor. 
 8. Headings. The headings of the various sections of this Agreement have been
inserted for convenience of reference only and will not be deemed to be part of this Agreement. 
 9. Severability. In case any
provision contained in this Agreement should be invalid, illegal or unenforceable in any respect, the validity, legality and enforceability of the remaining provisions contained herein will not in any way be affected or impaired thereby. 

10. Governing Law. This Agreement will be governed by, and construed in accordance with, the internal laws of the State of New York,
without giving effect to the principles of conflicts of law that would require the application of the laws of any other jurisdiction. 

11. Counterparts. This Agreement may be executed in two or more counterparts, each of which will constitute an original, but all of
which, when taken together, will constitute but one instrument, and will become effective when one or more counterparts have been signed by each party hereto and delivered to the other parties. The Company and the Investor acknowledge and agree that
the Company shall deliver its counterpart to the Investor along with the Prospectus Supplement (or the filing by the Company of an electronic version thereof with the Commission). 

12. Confirmation of Sale. The Investor acknowledges and agrees that such Investor’s receipt of the Company’s signed
counterpart to this Agreement, together with the Prospectus Supplement (or the filing by the Company of an electronic version thereof with the Commission), shall constitute written confirmation of the Company’s sale of the Units to such
Investor. 

  
 8 








 13. Press Release; 8-K Filing. The Company and the Investor agree that the Company shall
prior to the opening of the financial markets in New York City on April 1, 2014 (a) issue a press release announcing the Offering and disclosing all material information regarding the Offering and (b) file a current report on Form 8-K
with the Securities and Exchange Commission including, but not limited to, a form of this Agreement and the form of Warrant as exhibits thereto (the “8-K”). Effective upon the filing of the 8-K, the Company acknowledges and agrees
that any and all confidentiality and similar obligations under any agreement, whether written or oral, between the Company, any of its subsidiaries or any of their respective officers, directors, affiliates, employees or agents, on the one hand, and
the Investor or any of its affiliates, on the other hand, shall terminate. From and after the filing of the 8-K with the SEC, the Investor shall not be deemed to be in possession of any material, nonpublic information received from the Company, any
of its subsidiaries or any of their respective officers, directors, employees or agents. 
 14. Termination. In the event that the
Placement Agreement is terminated by the Placement Agents pursuant to the terms thereof, this Agreement shall terminate without any further action on the part of the parties hereto. 

  
 9 








 EXHIBIT A 

CLEAN DIESEL TECHNOLOGIES, INC. 

INVESTOR QUESTIONNAIRE 
 Pursuant to
Section 3 of Annex I to the Agreement, please provide us with the following information: 
  

					
	1.	 	 The exact name that your Shares and Warrants are to be registered in. You may use a nominee name if appropriate:
	 	  

	2.	 	 The relationship between the Investor and the registered holder listed in response to item 1 above:
	 	  

	3.	 	 The mailing address of the registered holder listed in response to item 1 above:
	 	  

	4.	 	 The Social Security Number or Tax Identification Number of the registered holder listed in the response to item 1 above:
	 	  

	5.	 	 Name of DTC Participant (broker-dealer at which the account or accounts to be credited with the Shares are maintained):
	 	  

	6.	 	 DTC Participant Number:
	 	  

	7.	 	 Name of Account at DTC Participant being credited with the Shares:
	 	  

	8.	 	 Account Number at DTC Participant being credited with the Shares:
	 	  



  
 A-1 








 EXHIBIT B 

FORM OF WARRANT 

  
 B-1