CDTI / CDTi Advanced Materials, Inc. - SEC-arkiveringar, Årsredovisning, Fullmaktsutlåtande

CDTi Advanced Materials, Inc.
US ˙ OTCPK

Grundläggande statistik
CIK 949428
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to CDTi Advanced Materials, Inc.
SEC Filings (Chronological Order)
Denna sida innehåller en komplett, kronologisk lista över SEC-arkiveringar, exklusive ägande-arkiveringar som vi tillhandahåller på andra ställen.
December 10, 2018 15-12B

CDTI / Clean Diesel Technologies, Inc. 15-12B

UNITED STATES OMB APPROVAL SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 OMB Number: 3235-0167 Expires: May 31, 2021 Estimated average burden hours per response . . . 1.50 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE

December 7, 2018 S-8 POS

CDTI / Clean Diesel Technologies, Inc. S-8 POS

As filed with the Securities and Exchange Commission on December 7, 2018 Registration No.

December 7, 2018 S-8 POS

CDTI / Clean Diesel Technologies, Inc. S-8 POS

As filed with the Securities and Exchange Commission on December 7, 2018 Registration No.

December 7, 2018 S-8 POS

CDTI / Clean Diesel Technologies, Inc. S-8 POS

As filed with the Securities and Exchange Commission on December 7, 2018 Registration No.

December 7, 2018 S-8 POS

CDTI / Clean Diesel Technologies, Inc. S-8 POS

As filed with the Securities and Exchange Commission on December 7, 2018 Registration No.

December 7, 2018 S-8 POS

CDTI / Clean Diesel Technologies, Inc. S-8 POS

As filed with the Securities and Exchange Commission on December 7, 2018 Registration No.

December 7, 2018 S-8 POS

CDTI / Clean Diesel Technologies, Inc. S-8 POS

As filed with the Securities and Exchange Commission on December 7, 2018 Registration No.

December 7, 2018 POS AM

CDTI / Clean Diesel Technologies, Inc. POS AM

As filed with the Securities and Exchange Commission on December 7, 2018 Registration No.

December 7, 2018 POS AM

CDTI / Clean Diesel Technologies, Inc. POS AM

As filed with the Securities and Exchange Commission on December 7, 2018 Registration No.

December 7, 2018 POS AM

CDTI / Clean Diesel Technologies, Inc. POS AM

As filed with the Securities and Exchange Commission on December 7, 2018 Registration No.

December 7, 2018 POS AM

CDTI / Clean Diesel Technologies, Inc. POS AM

As filed with the Securities and Exchange Commission on December 7, 2018 Registration No.

November 26, 2018 25

CDTI / Clean Diesel Technologies, Inc. 25

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 25 OMB APPROVAL OMB Number: 3235-0080 Expires: March 31, 2021 Estimated average burden hours per response. . . . . . 1.00 NOTIFICATION OF REMOVAL FROM LISTING AND/OR REGISTRATION UNDER SECTION 12(b) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number 001-33710 Issuer: CDTI ADVANCED MATERIALS, INC. Exchange: The

November 14, 2018 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): November 14, 2018 CDTi ADVANCED MATERIALS, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer

November 14, 2018 EX-99.1

CDTi Advanced Materials, Inc. Reports Third Quarter 2018 Financial Results Announces Plan to Delist from Nasdaq and Deregister Its Common Stock

Exhibit 99.1 CDTi Advanced Materials, Inc. Reports Third Quarter 2018 Financial Results Announces Plan to Delist from Nasdaq and Deregister Its Common Stock Oxnard, California — November 14, 2018 — CDTi Advanced Materials, Inc. (Nasdaq: CDTI) (“CDTi” or “the Company”), a leader in advanced catalyst materials technology, reported today its financial results for the third quarter ended September 30,

November 14, 2018 10-Q

CDTI / Clean Diesel Technologies, Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2018 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Numbe

October 18, 2018 EX-10.1

Employment Agreement, dated as of October 12, 2018, between CDTi Advanced Materials, Inc. and Matthew Beale.

Exhibit 10.1 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (“Agreement”) is made as of October 12, 2018 (the “Effective Date”) by and between CDTi Advanced Materials, Inc., a Delaware corporation (“CDTI” or the “Company”), and Matthew Beale (“Executive”). WHEREAS, CDTI and Executive desire to enter into an agreement setting forth the terms and conditions of Executive’s continued employment with C

October 18, 2018 EX-10.2

Employment Agreement, dated as of October 12, 2018, between CDTi Advanced Materials, Inc. and Peter J. Chase.

Exhibit 10.2 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (“Agreement”) is made as of October 12, 2018 (the “Effective Date”) by and between CDTi Advanced Materials, Inc., a Delaware corporation (“CDTI” or the “Company”), and Peter Chase (“Executive”). WHEREAS, CDTI and Executive desire to enter into an agreement setting forth the terms and conditions of Executive’s continued employment with CDT

October 18, 2018 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): October 12, 2018 CDTi ADVANCED MATERIALS, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer

October 18, 2018 EX-10.3

Employment Agreement, dated as of October 12, 2018, between CDTi Advanced Materials, Inc. and Tracy A. Kern.

Exhibit 10.3 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (“Agreement”) is made as of October 12, 2018 (the “Effective Date”) by and between CDTi Advanced Materials, Inc., a Delaware corporation (“CDTI” or the “Company”), and Tracy Kern (“Executive”). WHEREAS, CDTI and Executive desire to enter into an agreement setting forth the terms and conditions of Executive’s continued employment with CDTI

September 25, 2018 EX-3.1

Certificate of Amendment to the Restated Certificate of Incorporation of CDTi Advanced Materials, Inc.

Exhibit 3.1 CERTIFICATE OF AMENDMENT TO THE RESTATED CERTIFICATE OF INCORPORATION OF CDTI ADVANCED MATERIALS, INC. CDTi Advanced Materials, Inc., a corporation organized and existing under the General Corporation Law of the State of Delaware (the “Corporation”), hereby does certify: FIRST: The name of the corporation is CDTi Advanced Materials, Inc. The original Certificate of Incorporation of the

September 25, 2018 EX-99.1

CDTi Announces Effective Date of Reverse Stock Split

Exhibit 99.1 CDTi Announces Effective Date of Reverse Stock Split Oxnard, California — September 21, 2018 — CDTi Advanced Materials, Inc. (NASDAQ: CDTI) (“CDTi” or “the Company”), a leader in advanced emission control technology, announced the expected effective date of its 1-for-5 reverse stock split. Stockholders granted the Board of Directors discretionary authority to effect the reverse split

September 25, 2018 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): September 21, 2018 CDTi ADVANCED MATERIALS, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employe

August 29, 2018 8-K

Other Events, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): August 24, 2018 CDTi ADVANCED MATERIALS, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer o

August 14, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): August 14, 2018 CDTi ADVANCED MATERIALS, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer o

August 14, 2018 EX-99.1

CDTi Advanced Materials, Inc. Reports Second Quarter 2018 Financial Results

Exhibit 99.1 CDTi Advanced Materials, Inc. Reports Second Quarter 2018 Financial Results Oxnard, California —August 14, 2018 — CDTi Advanced Materials, Inc. (Nasdaq: CDTI) (“CDTi” or “the Company”), a leader in advanced catalyst materials technology, reported its financial results for the second quarter ended June 30, 2018. Matthew Beale, CDTi’s CEO, stated, “In the second quarter of 2018, we achi

August 14, 2018 10-Q

CDTI / Clean Diesel Technologies, Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2018 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 00

July 13, 2018 424B5

CDTi Advanced Materials, Inc. Non-Transferable Subscription Rights to Purchase an Aggregate of up to 6,849,000 shares of common stock at a Subscription Price of $0.50 per Share

424B5 1 a18-172331424b5.htm 424B5 Amendment No. 1 to Prospectus Supplement dated June 28, 2018 (to Prospectus dated November 17, 2015) Filed Pursuant to Rule 424(B)(5) Registration No. 333-204309 CDTi Advanced Materials, Inc. Non-Transferable Subscription Rights to Purchase an Aggregate of up to 6,849,000 shares of common stock at a Subscription Price of $0.50 per Share This Amendment No. 1 to pro

July 9, 2018 DEFA14A

CDTI / Clean Diesel Technologies, Inc. DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

July 9, 2018 DEF 14A

CDTI / Clean Diesel Technologies, Inc. DEF 14A

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

June 29, 2018 PRE 14A

CDTI / Clean Diesel Technologies, Inc. PRE 14A

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

June 28, 2018 EX-4.1

Subscription Agent Agreement dated as of June 28, 2018 between the Company and American Stock Transfer & Trust Company, LLC.

Exhibit 4.1 SUBSCRIPTION AGENT AGREEMENT This SUBSCRIPTION AGENT AGREEMENT (this “Agreement”) is entered into as of June 28, 2018, by and between American Stock Transfer & Trust Company, LLC (the “Subscription Agent”) and CDTi Advanced Materials, Inc. (the “Company”). 1. The Company is offering (the “Rights Offering”) to the holders of shares of its common stock, par value $0.01 per share (“Common

June 28, 2018 8-K

Financial Statements and Exhibits, Other Events

8-K 1 a18-1535338k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): June 28, 2018 CDTi ADVANCED MATERIALS, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (C

June 28, 2018 EX-4.2

Form of Rights Certificate.

Exhibit 4.2 RIGHTS CERTIFICATE #: NUMBER OF RIGHTS THE TERMS AND CONDITIONS OF THE RIGHTS OFFERING ARE SET FORTH IN THE COMPANY’S PROSPECTUS SUPPLEMENT DATED JUNE 28, 2018 (THE “PROSPECTUS SUPPLEMENT”) AND ARE INCORPORATED HEREIN BY REFERENCE. COPIES OF THE PROSPECTUS SUPPLEMENT AND THE ACCOMPANYING BASE PROSPECTUS ARE AVAILABLE UPON REQUEST FROM CDTI ADVANCED MATERIALS, INC. CDTi Advanced Materia

June 28, 2018 424B5

CDTi Advanced Materials, Inc. Non-Transferable Subscription Rights to Purchase an Aggregate of up to 6,849,000 shares of common stock at a Subscription Price of $0.50 per Share

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No.

May 14, 2018 10-Q

CDTI / Clean Diesel Technologies, Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2018 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 0

May 14, 2018 EX-99.1

CDTi Advanced Materials, Inc. Reports First Quarter 2018 Financial Results

Exhibit 99.1 CDTi Advanced Materials, Inc. Reports First Quarter 2018 Financial Results Oxnard, California — May 14, 2018 — CDTi Advanced Materials, Inc. (Nasdaq: CDTI) (“CDTi” or “the Company”), a leader in advanced catalyst materials technology, reported its financial results for the first quarter ended March 31, 2018. Matthew Beale, CDTi’s CEO, stated, “In the first quarter of 2018, we achieved

May 14, 2018 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 a18-1342418k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): May 10, 2018 CDTi ADVANCED MATERIALS, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Co

May 7, 2018 DEFA14A

CDTI / Clean Diesel Technologies, Inc. DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

April 2, 2018 10-K

CDTI / Clean Diesel Technologies, Inc. 10-K (Annual Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended: December 31, 2017 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No.: 001-33710 CDTi ADVANCED MATERIALS, IN

April 2, 2018 EX-21.1

SUBSIDIARIES OF REGISTRANT

Exhibit 21.1 SUBSIDIARIES OF REGISTRANT CDTi Advanced Materials, Inc.’s subsidiaries as of December 31, 2017 are listed below. Name of Subsidiary State/Jurisdiction of Incorporation Common Equity Ownership Clean Diesel Technologies Limited United Kingdom 100 % Catalytic Solutions, Inc. California 100 % CSI Aliso, Inc. California 100 % Catalytic Solutions Holdings, Inc. Delaware 100 % ECS Holdings,

April 2, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 a18-938618k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): April 2, 2018 CDTi ADVANCED MATERIALS, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Co

April 2, 2018 EX-99.1

CDTi Advanced Materials, Inc. Reports Fourth Quarter and Year-end 2017 Financial Results

Exhibit 99.1 CDTi Advanced Materials, Inc. Reports Fourth Quarter and Year-end 2017 Financial Results Oxnard, California — April 2, 2018 — CDTi Advanced Materials, Inc., (Nasdaq: CDTI) (“CDTi” or “the Company”), a leader in advanced emission control technology, reported its financial results for the fourth quarter and year ended December 31, 2017. Matthew Beale, CDTi Advanced Materials’ CEO, state

March 15, 2018 EX-3.1

Certificate of Amendment to the Restated Certificate of Incorporation of the Registrant

Exhibit 3.1 CERTIFICATE OF AMENDMENT TO THE RESTATED CERTIFICATE OF INCORPORATION OF CLEAN DIESEL TECHNOLOGIES, INC. Clean Diesel Technologies, Inc., a corporation organized and existing under the General Corporation Law of the State of Delaware (the “Corporation”), hereby does certify that: FIRST: The name of the corporation is Clean Diesel Technologies, Inc. The original Certificate of Incorpora

March 15, 2018 EX-99.1

CDTi Announces Name Change to CDTi Advanced Materials, Inc.

Exhibit 99.1 CDTi Announces Name Change to CDTi Advanced Materials, Inc. Oxnard, California – March 9, 2018 – Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (“CDTi” or “the Company”), a leader in advanced emission control technology, announced it has changed its corporate name to CDTi Advanced Materials, Inc., effective March 12, 2018. The company will continue trading on Nasdaq as “CDTI.” The nam

March 15, 2018 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): March 9, 2018 CDTI ADVANCED MATERIALS, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer of

November 14, 2017 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 a17-2646118k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): November 14, 2017 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdict

November 14, 2017 EX-99.1

CDTi Announces Third Quarter 2017 Financial Results Achieves key milestones in advanced materials commercialization

Exhibit 99.1 CDTi Announces Third Quarter 2017 Financial Results Achieves key milestones in advanced materials commercialization Oxnard, California ? Nov. 14, 2017 ? Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, reported its financial results for the third quarter ended Sept. 30, 2017. Matthew Beale, CDTi?s CEO, stated,

November 14, 2017 10-Q

CDTI / Clean Diesel Technologies, Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2017 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Numbe

September 20, 2017 8-K

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): September 18, 2017 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Emplo

September 20, 2017 EX-16.1

Letter to the Securities and Exchange Commission from BDO USA, LLP dated September 18, 2017.

Exhibit 16.1 September 18, 2017 Securities and Exchange Commission 100 F Street N.E. Washington, D.C. 20549 We have been furnished with a copy of the response to Item 4.01 of Form 8-K for the event that occurred on September 18, 2017, to be filed by our former client, Clean Diesel Technologies, Inc. We agree with the statements made in response to that Item insofar as they relate to our Firm. Very

September 12, 2017 EX-99.1

CDTi Exits Downstream Distribution Activities through Sale of DuraFit™ Product Line Transaction represents final step in enabling transition to technology provider business model To hold conference call and address company outlook on September 14th a

Exhibit 99.1 CDTi Exits Downstream Distribution Activities through Sale of DuraFit? Product Line Transaction represents final step in enabling transition to technology provider business model To hold conference call and address company outlook on September 14th at 2:00 p.m. PST Oxnard, California ? Sept. 11, 2017 ? Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (?CDTi? or ?the Company?), a leader

September 12, 2017 8-K

Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets

8-K 1 a17-2192218k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): September 12, 2017 (September 8, 2017) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (Sta

September 12, 2017 EX-2.1

Asset Purchase Agreement, dated September 8, 2017, by and between the Registrant, Catalytic Solutions, Inc., Engine Control Systems Limited, and AP Emissions Technologies, LLC.

Exhibit 2.1 ASSET PURCHASE AGREEMENT This ASSET PURCHASE AGREEMENT (this “Agreement”), dated as of September 8, 2017, is entered into among Clean Diesel Technologies, Inc., a Delaware corporation (the “Company”), Catalytic Solutions, Inc., a California corporation (“Catalytic Solutions”), Engine Control Systems Limited, a New Brunswick corporation (“Engine Control Systems” and, together with the C

August 14, 2017 EX-99.1

CDTi Announces Second Quarter 2017 Financial Results

Exhibit 99.1 CDTi Announces Second Quarter 2017 Financial Results Oxnard, California – Aug. 14, 2017 – Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (“CDTi” or “the Company”), a leader in advanced emission control technology, reported its financial results for the second quarter ended June 30, 2017. Matthew Beale, CDTi’s CEO, stated, “We are nearing our goal to complete CDTi’s transition to an ad

August 14, 2017 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): August 14, 2017 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer

August 14, 2017 10-Q

CDTI / Clean Diesel Technologies, Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2017 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 00

August 1, 2017 424B7

CLEAN DIESEL TECHNOLOGIES, INC. 6,232,750 Shares Common Stock

Filed Pursuant to Rule 424(b)(7) Registration No. 333-215399 Prospectus Supplement No. 1 (to prospectus dated January 10, 2017) CLEAN DIESEL TECHNOLOGIES, INC. 6,232,750 Shares Common Stock This prospectus supplement updates and amends certain information contained in the prospectus dated January 10, 2017 (the ?Prospectus?) relating to the offer and sale from time to time by certain selling stockh

May 31, 2017 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): May 25, 2017 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer of

May 15, 2017 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): May 15, 2017 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer of

May 15, 2017 EX-99.1

CDTi Announces First Quarter 2017 Financial Results

Exhibit 99.1 CDTi Announces First Quarter 2017 Financial Results Oxnard, California – May 15, 2017 – Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (“CDTi” or “the Company”), a leader in advanced emission control technology, reported its financial results for the first quarter ended March 31, 2017. Matthew Beale, CDTi’s CEO, stated, “We are making significant progress in transitioning CDTi to an a

May 15, 2017 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2017 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 0

April 10, 2017 DEF 14A

Clean Diesel Technologies DEF 14A

Document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a party other than the Registrant Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Prox

April 7, 2017 EX-10.47

CLEAN DIESEL TECHNOLOGIES, INC. NON-QUALIFIED STOCK OPTION AGREEMENT

Non-Employee Director Exhibit 10.47 CLEAN DIESEL TECHNOLOGIES, INC. NON-QUALIFIED STOCK OPTION AGREEMENT Non-Employee Director Clean Diesel Technologies, Inc. 2016 OMNIBUS Incentive Plan Notice Of NON-QUALIFIED STOCK OPTION Grant You have been granted the following Non-Qualified Stock Options (?Options?) to purchase common stock, par value $0.01 per share (?Common Stock?) of Clean Diesel Technolog

April 7, 2017 EX-10.6

EMPLOYMENT AGREEMENT

Exhibit 10.6 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (?Agreement?) is made as of December 14, 2016 (the ?Effective Date?) by and between Clean Diesel Technologies, Inc., a Delaware corporation (?CDTI? or the ?Company?), and Steve Golden (?Executive?). WHEREAS, CDTI and Executive desire to enter into an agreement setting forth the terms and conditions of Executive?s employment with CDTI; NOW

April 7, 2017 EX-10.44

CLEAN DIESEL TECHNOLOGIES, INC. NON-QUALIFIED STOCK OPTION AGREEMENT

Employee Exhibit 10.44 CLEAN DIESEL TECHNOLOGIES, INC. NON-QUALIFIED STOCK OPTION AGREEMENT Employee Clean Diesel Technologies, Inc. 2016 OMNIBUS Incentive Plan Notice Of NON-QUALIFIED STOCK OPTION Grant You have been granted the following Non-Qualified Stock Options (?Options?) to purchase common stock, par value $0.01 per share (?Common Stock?) of Clean Diesel Technologies, Inc. (the ?Company?):

April 7, 2017 EX-10.45

CLEAN DIESEL TECHNOLOGIES, INC. INCENTIVE STOCK OPTION AGREEMENT

Employee Exhibit 10.45 CLEAN DIESEL TECHNOLOGIES, INC. INCENTIVE STOCK OPTION AGREEMENT Employee Clean Diesel Technologies, Inc. 2016 Omnibus Incentive Plan Notice Of Incentive STOCK OPTION Grant You have been granted the following Incentive Stock Options (?Options?) to purchase common stock, par value $0.01 per share (?Common Stock?) of Clean Diesel Technologies, Inc. (the ?Company?): Name of Opt

April 7, 2017 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended: December 31, 2016 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No.: 001-33710 CLEAN DIE

April 7, 2017 EX-10.43

CLEAN DIESEL TECHNOLOGIES, INC. RESTRICTED STOCK UNIT AGREEMENT

Employee Exhibit 10.43 CLEAN DIESEL TECHNOLOGIES, INC. RESTRICTED STOCK UNIT AGREEMENT Employee Clean Diesel Technologies, Inc. 2016 omnibus Incentive Plan Notice Of RESTRICTED STOCK UNIT Grant You have been granted the following Restricted Stock Units (?RSUs?) for shares of common stock, par value $0.01 per share (?Common Stock?), of Clean Diesel Technologies, Inc. (the ?Company?): Name of Recipi

April 7, 2017 EX-10.46

CLEAN DIESEL TECHNOLOGIES, INC. RESTRICTED STOCK UNIT AGREEMENT

Non-Employee Director Exhibit 10.46 CLEAN DIESEL TECHNOLOGIES, INC. RESTRICTED STOCK UNIT AGREEMENT Non-Employee Director Clean Diesel Technologies, Inc. 2016 omnibus Incentive Plan Notice Of RESTRICTED STOCK UNIT Grant You have been granted the following Restricted Stock Units (?RSUs?) for shares of common stock, par value $0.01 per share (?Common Stock?), of Clean Diesel Technologies, Inc. (the

April 3, 2017 NT 10-K

Clean Diesel Technologies NT 10-K

OMB APPROVAL UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING OMB Number: 3235-0058 Expires: October 31, 2018 Estimated average burden hours per response . . . . . . 2.50 SEC FILE NUMBER 001-33710 CUSIP NUMBER 18449C 500 (Check one): x Form 10-K o Form 20-F o Form 11-K o Form 10-Q o Form 10-D o Form N-SAR o Form N-CSR For Period Ended:

March 31, 2017 EX-99.1

CDTi Announces Fourth Quarter and Year-end 2016 Financial Results – Began commercialization of Powder-to-Coat model in fast-growing China automotive market – – Launched technology provider model in North American heavy-duty market –

Exhibit 99.1 CDTi Announces Fourth Quarter and Year-end 2016 Financial Results – Began commercialization of Powder-to-Coat model in fast-growing China automotive market – – Launched technology provider model in North American heavy-duty market – Oxnard, California – March 31, 2017 – Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (“CDTi” or “the Company”), a leader in advanced emission control tech

March 31, 2017 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): March 31, 2017 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer

January 31, 2017 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): January 30, 2017 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employe

January 31, 2017 EX-10.1

EMPLOYMENT AGREEMENT

Exhibit 10.1 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (“Agreement”) is made as of January 11, 2017 (the “Effective Date”) by and between Clean Diesel Technologies, Inc., a Delaware corporation (“CDTI” or the “Company”), and Peter J. Chase (“Executive”). WHEREAS, CDTI and Executive desire to enter into an agreement setting forth the terms and conditions of Executive’s employment with CDTI; NO

January 31, 2017 EX-99.1

January 30, 2017

Exhibit 99.1 January 30, 2017 CDTi Appoints Peter J. Chase Chief Operating Officer OXNARD, Calif., Jan. 30, 2017 (GLOBE NEWSWIRE) ? Clean Diesel Technologies, Inc. (Nasdaq:CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, appointed Peter J. Chase as Chief Operating Officer effective today, January 30, 2017. He will report to CEO Matthew Beale. ?We are excited to ha

January 6, 2017 CORRESP

Clean Diesel Technologies ESP

CLEAN DIESEL TECHNOLOGIES, INC. 1621 Fiske Place Oxnard, California 93033 January 6, 2017 VIA EDGAR United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Re: Clean Diesel Technologies, Inc. Registration Statement on Form S-3 (File No. 333-215399) Acceleration Request Requested Date: January 10, 2017 Requested Time: 4:00 p.m. Eastern Daylight Time Ladies and Gen

December 30, 2016 S-3

Clean Diesel Technologies S-3

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents As filed with the Securities and Exchange Commission on December 30, 2016.

December 29, 2016 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): December 29, 2016 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employ

December 17, 2016 S-8

Clean Diesel Technologies S-8

As filed with the Securities and Exchange Commission on December 16, 2016 Registration No.

December 16, 2016 EX-10.1

CLEAN DIESEL TECHNOLOGIES, INC. 2016 OMNIBUS INCENTIVE PLAN

Exhibit 10.1 CLEAN DIESEL TECHNOLOGIES, INC. 2016 OMNIBUS INCENTIVE PLAN Clean Diesel Technologies, Inc. (the “Company”), a Delaware corporation, hereby establishes and adopts the following 2016 Omnibus Incentive Plan (the “Plan”). 1. PURPOSE OF THE PLAN The purpose of the Plan is to assist the Company and its Subsidiaries in attracting and retaining selected individuals to serve as employees, dir

December 16, 2016 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): December 16, 2016 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employ

December 16, 2016 EX-3.1

Certification of Amendment to the Restated Certificate of Incorporation of the Registrant

Exhibit 3.1 CERTIFICATE OF AMENDMENT TO THE RESTATED CERTIFICATE OF INCORPORATION OF CLEAN DIESEL TECHNOLOGIES, INC. Clean Diesel Technologies, Inc., a corporation organized and existing under the General Corporation Law of the State of Delaware (the ?Corporation?), hereby does certify: FIRST: The name of the corporation is Clean Diesel Technologies, Inc. The original Certificate of Incorporation

December 16, 2016 EX-10.2

CLEAN DIESEL TECHNOLOGIES, INC. WARRANT TO PURCHASE COMMON STOCK

Exhibit 10.2 NEITHER THIS WARRANT NOR THE SECURITIES ISSUABLE UPON EXERSISE OF THIS WARRANT HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THESE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR (B

December 16, 2016 EX-10.3

SECURITIES PURCHASE AGREEMENT

Exhibit 10.3 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is made as of December 16, 2016, by and between Clean Diesel Technologies, Inc. (the “Company”) and MDB Capital Group, LLC (“Purchaser”). WHEREAS, the Company currently is indebted to Purchaser in the amount of $163,100 (the “Existing Indebtedness”); and WHEREAS, the Company and Purchaser desire for th

November 21, 2016 DEF 14C

Clean Diesel Technologies DEF 14C

QuickLinks - Click here to rapidly navigate through this document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 14, 2016 EX-99.1

CDTi Announces Third Quarter Fiscal Year 2016 Financial Results – Reports revenue of $10.1 million - – Improves operating expenses by $1.7 million year-over-year – – Revises full year 2016 financial guidance –

Exhibit 99.1 CDTi Announces Third Quarter Fiscal Year 2016 Financial Results ? Reports revenue of $10.1 million - ? Improves operating expenses by $1.7 million year-over-year ? ? Revises full year 2016 financial guidance ? Oxnard, California ? Nov. 14, 2016 ? Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, reported its fin

November 14, 2016 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): November 14, 2016 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employ

November 14, 2016 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2016 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Numbe

November 10, 2016 PRE 14C

Clean Diesel Technologies PRE 14C

QuickLinks - Click here to rapidly navigate through this document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 8, 2016 EX-10.1

SECURITIES PURCHASE AGREEMENT

Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This SECURITIES PURCHASE AGREEMENT (the ?Agreement?) is dated as of the 3rd day of November, 2016, by and between Clean Diesel Technologies, Inc., a Delaware corporation (the ?Company?), and each individual or entity named on the Schedule of Buyers attached hereto (each such individual or entity, individually, a ?Buyer? and all of such individuals or enti

November 8, 2016 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): November 3, 2016 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employe

November 8, 2016 EX-99.1

CDTi Announces Signing of Securities Purchase Agreement to Raise Approximately $10.3 Million

Exhibit 99.1 CDTi Announces Signing of Securities Purchase Agreement to Raise Approximately $10.3 Million Oxnard, California ? November 4, 2016 ? Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, announced it has entered into a definitive agreement with various institutional and individual accredited investors and certain of

November 8, 2016 EX-10.2

REGISTRATION RIGHTS AGREEMENT

Exhibit 10.2 REGISTRATION RIGHTS AGREEMENT This Registration Rights Agreement (the ?Agreement?) is made and entered into as of this 4th day of November, 2016 by and among Clean Diesel Technologies, Inc., a Delaware corporation (the ?Company?), and the investors identified on the signature pages hereto (each, including its successors and assigns, an ?Investor,? and collectively, the ?Investors?). R

November 8, 2016 EX-10.3

CLEAN DIESEL TECHNOLOGIES, INC. WARRANT TO PURCHASE COMMON STOCK

Exhibit 10.3 NEITHER THIS WARRANT NOR THE SECURITIES ISSUABLE UPON EXERSISE OF THIS WARRANT HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THESE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR (B

September 6, 2016 EX-99.6

COMMON STOCK PURCHASE WARRANT CLEAN DIESEL TECHNOLOGIES, INC.

EX-99.6 7 a16-178621ex99d6.htm EX-99.6 Exhibit 99.6 THIS WARRANT HAS NOT BEEN AND WILL NOT REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE HOLDER HEREOF, BY PURCHASING THIS WARRANT, AGREES FOR THE BENEFIT OF THE COMPANY THAT THIS WARRANT MAY NOT BE OFFERED, SOLD, PLEDGED, OR OTHERWISE TRANSFERRED BY SUCH HOLDER PRIOR TO THE LATER OF THE (X) SIX MON

September 6, 2016 EX-99.1

KANIS S.A. P.O. Box 986 Third Floor Geneva Place Road Town Tortola VG1110 British Virgin Islands

Exhibit 99.1 KANIS S.A. P.O. Box 986 Third Floor Geneva Place Road Town Tortola VG1110 British Virgin Islands June 30, 2016 Clean Diesel Technologies, Inc. 1621 Fiske Place Oxnard, CA 93033 Attention: Matthew Beale Chief Executive Officer Re: Exchange of Notes for Common Stock Gentlemen: This letter (this “Agreement”) will confirm the agreement of Clean Diesel Technologies, Inc., a Delaware corpor

September 6, 2016 EX-99.5

[Signature page follows.]

Exhibit 99.5 WARRANT No. 4A (Original Warrant 4 issued 07/27/2012; Warrant 4A issued 10/07/2015) THIS WARRANT HAS NOT BEEN AND WILL NOT REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE HOLDER HEREOF, BY PURCHASING THIS WARRANT, AGREES FOR THE BENEFIT OF THE COMPANY THAT THIS WARRANT MAY NOT BE OFFERED, SOLD, PLEDGED, OR OTHERWISE TRANSFERRED BY SUCH

September 6, 2016 EX-99.2

Debt Subordination Agreement

Exhibit 99.2 Debt Subordination Agreement Borrower: Clean Diesel Technologies, Inc. Creditor: Kanis, S.A. Date: June 30, 2016 This Debt Subordination Agreement is executed by the above-named Creditor (“Creditor”) in favor of Haldor Topsøe A/S (“Lender”), with respect to the above-named borrower (“Borrower”). In order to induce Lender to extend or continue to extend financing to the Borrower (but w

September 6, 2016 EX-99.7

COMMON STOCK PURCHASE WARRANT CLEAN DIESEL TECHNOLOGIES, INC.

Exhibit 99.7 THIS WARRANT HAS NOT BEEN AND WILL NOT REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE HOLDER HEREOF, BY PURCHASING THIS WARRANT, AGREES FOR THE BENEFIT OF THE COMPANY THAT THIS WARRANT MAY NOT BE OFFERED, SOLD, PLEDGED, OR OTHERWISE TRANSFERRED BY SUCH HOLDER PRIOR TO THE LATER OF THE (X) SIX MONTHS FOLLOWING THE ISSUANCE HEREOF OR (Y

September 6, 2016 EX-99.3

[Signature page follows.]

Exhibit 99.3 WARRANT No. 12-03A (Original Warrant 12-03 issued 12/30/2010; Warrant 12-03A issued 10/07/2015) THIS WARRANT HAS NOT BEEN AND WILL NOT REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE HOLDER HEREOF, BY PURCHASING THIS WARRANT, AGREES FOR THE BENEFIT OF THE COMPANY THAT THIS WARRANT MAY NOT BE OFFERED, SOLD, PLEDGED, OR OTHERWISE TRANSFE

September 6, 2016 EX-99.4

[Signature page follows.]

Exhibit 99.4 WARRANT No. 3A (Original Warrant 3 issued 02/16/2012; Warrant 3A issued 10/07/2015) THIS WARRANT HAS NOT BEEN AND WILL NOT REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE HOLDER HEREOF, BY PURCHASING THIS WARRANT, AGREES FOR THE BENEFIT OF THE COMPANY THAT THIS WARRANT MAY NOT BE OFFERED, SOLD, PLEDGED, OR OTHERWISE TRANSFERRED BY SUCH

September 6, 2016 SC 13D

CDTI / Clean Diesel Technologies, Inc. / Kanis S.A. - SC 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* Clean Diesel Technologies, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 18449C 500 (CUSIP Number) Thomas W. Henning, Esq. Allen Matkins Leck Gamble Mallory & Natsis LLP 865 South Figueroa Street, Suite 2800

September 1, 2016 EX-99.1

CDTi Strengthens Balance Sheet with Completion of Debt Conversion Completes steps to regain compliance with NASDAQ’s listing requirements Significantly reduces debt and cost of capital

Exhibit 99.1 CDTi Strengthens Balance Sheet with Completion of Debt Conversion Completes steps to regain compliance with NASDAQ?s listing requirements Significantly reduces debt and cost of capital Oxnard, California ? September 1, 2016 ? Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, announced it has successfully convert

September 1, 2016 8-K

Changes in Control of Registrant, Unregistered Sales of Equity Securities, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): August 30, 2016 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer

August 26, 2016 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): August 25, 2016 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer

August 18, 2016 DEFA14A

Clean Diesel Technologies DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

August 18, 2016 DEFA14A

Clean Diesel Technologies DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

August 15, 2016 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): August 15, 2016 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer

August 15, 2016 EX-99.1

CDTi Announces Second Quarter Fiscal Year 2016 Financial Results

Exhibit 99.1 CDTi Announces Second Quarter Fiscal Year 2016 Financial Results Oxnard, California ? August 15, 2016 ? Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, reported its financial results for the second quarter ended June 30, 2016. Matthew Beale, CDTi?s CEO, stated, ?In the second quarter, we achieved important mil

August 15, 2016 EX-99.1

CDTi Announces Second Quarter Fiscal Year 2016 Financial Results

Exhibit 99.1 CDTi Announces Second Quarter Fiscal Year 2016 Financial Results Oxnard, California ? August 15, 2016 ? Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, reported its financial results for the second quarter ended June 30, 2016. Matthew Beale, CDTi?s CEO, stated, ?In the second quarter, we achieved important mil

August 15, 2016 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): August 15, 2016 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer

August 15, 2016 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2016 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 00

July 26, 2016 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): July 22, 2016 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (IRS Employer o

July 26, 2016 EX-99.1

CDTi Announces Effective Date of Reverse Stock Split

Exhibit 99.1 CDTi Announces Effective Date of Reverse Stock Split Oxnard, California ? July 22, 2016 ? Clean Diesel Technologies, Inc. (NASDAQ: CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, announced the expected effective date of its 1-for-5 reverse stock split. Stockholders granted the Board of Directors discretionary authority to effect the reverse split at

July 26, 2016 EX-3.1

Certificate of Amendment to the Restated Certificate of Incorporation of the Registrant.

Exhibit 3.1 CERTIFICATE OF AMENDMENT TO THE RESTATED CERTIFICATE OF INCORPORATION OF CLEAN DIESEL TECHNOLOGIES, INC. Clean Diesel Technologies, Inc., a corporation organized and existing under the General Corporation Law of the State of Delaware (the ?Corporation?), hereby does certify: FIRST: The name of the corporation is Clean Diesel Technologies, Inc. The original Certificate of Incorporation

July 19, 2016 DEF 14A

Clean Diesel Technologies DEF 14A

QuickLinks - Click here to rapidly navigate through this document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

July 8, 2016 PRE 14A

Clean Diesel Technologies PRE 14A

QuickLinks - Click here to rapidly navigate through this document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

July 1, 2016 8-K

Entry into a Material Definitive Agreement, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): July 1, 2016 (June 30, 2016) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission

July 1, 2016 EX-10.1

KANIS S.A. P.O. Box 986 Third Floor Geneva Place Road Town Tortola VG1110 British Virgin Islands

Exhibit 10.1 KANIS S.A. P.O. Box 986 Third Floor Geneva Place Road Town Tortola VG1110 British Virgin Islands June 30, 2016 Clean Diesel Technologies, Inc. 1621 Fiske Place Oxnard, CA 93033 Attention: Matthew Beale Chief Executive Officer Re: Exchange of Notes for Common Stock Gentlemen: This letter (this ?Agreement?) will confirm the agreement of Clean Diesel Technologies, Inc., a Delaware corpor

July 1, 2016 EX-10.6

Clean Diesel Technologies, Inc. CONVERTIBLE PROMISSORY NOTE

Exhibit 10.6 Clean Diesel Technologies, Inc. CONVERTIBLE PROMISSORY NOTE Principal Amount US$500,000.00 Oxnard, California June 30, 2016 For value received, the undersigned Clean Diesel Technologies, Inc., a Delaware corporation (?Maker?), promises to pay to Haldor Tops?e A/S (?Payee?), or order, the principal sum of Five Hundred Thousand Dollars (US$500,000.00), together with interest at the rate

July 1, 2016 EX-10.4

NOTE PURCHASE AGREEMENT

Exhibit 10.4 NOTE PURCHASE AGREEMENT This Note Purchase Agreement (this ?Agreement?) is made as of June 30, 2016, by and between Clean Diesel Technologies, Inc., a Delaware corporation (the ?Company?), and Haldor Tops?e A/S, a company organized under the laws of Denmark (?Purchaser?). WHEREAS, Purchaser desires to purchase and acquire from the Company and the Company desires to sell and issue to P

July 1, 2016 EX-10.5

Clean Diesel Technologies, Inc. SENIOR CONVERTIBLE PROMISSORY NOTE

Exhibit 10.5 Clean Diesel Technologies, Inc. SENIOR CONVERTIBLE PROMISSORY NOTE Principal Amount US$750,000.00 Oxnard, California June 30, 2016 For value received, the undersigned Clean Diesel Technologies, Inc., a Delaware corporation (?Maker?), promises to pay to Haldor Tops?e A/S (?Payee?), or order, the principal sum of Seven Hundred Fifty Thousand Dollars (US$750,000.00), together with intere

July 1, 2016 EX-10.3

Debt Subordination Agreement

Exhibit 10.3 Debt Subordination Agreement Borrower: Clean Diesel Technologies, Inc. Creditor: Kanis, S.A. Date: June 30, 2016 This Debt Subordination Agreement is executed by the above-named Creditor (“Creditor”) in favor of Haldor Topsøe A/S (“Lender”), with respect to the above-named borrower (“Borrower”). In order to induce Lender to extend or continue to extend financing to the Borrower (but w

July 1, 2016 EX-10.2

Lon E. Bell, Ph.D. [Address]

Exhibit 10.2 Lon E. Bell, Ph.D. [Address] June 30, 2016 Clean Diesel Technologies, Inc. 1621 Fiske Place Oxnard, CA 93033 Attention: Matthew Beale Chief Executive Officer Re: Exchange of Note for Common Stock Gentlemen: This letter (this “Agreement”) will confirm the agreement of Clean Diesel Technologies, Inc., a Delaware corporation (the “Company”) to an exchange with Lon E. Bell, Ph.D. (“Holder

June 1, 2016 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): June 1, 2016 (May 25, 2016) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (

June 1, 2016 EX-10.3

ADDENDUM TO EMPLOYMENT AGREEMENT

Exhibit 10.3 ADDENDUM TO EMPLOYMENT AGREEMENT This addendum (?Addendum?) to the Employment Agreement between Clean Diesel Technologies, Inc., a Delaware corporation (?CDTI? or the ?Company?) and Matthew Beale (?Executive?) (inclusively, the ?Parties?) is entered into on June 1, 2016. A. The Parties entered into a written employment agreement on October 22, 2015, which agreement was amended by that

June 1, 2016 EX-10.2

EMPLOYMENT AGREEMENT

Exhibit 10.2 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (?Agreement?) is made as of May 25, 2016 (the ?Effective Date?) by and between Clean Diesel Technologies, Inc., a Delaware corporation (?CDTI? or the ?Company?), and Tracy Kern (?Executive?). WHEREAS, CDTI and Executive desire to enter into an agreement setting forth the terms and conditions of Executive?s employment with CDTI; NOW THEREF

June 1, 2016 EX-10.1

SEPARATION AGREEMENT AND RELEASE

Exhibit 10.1 SEPARATION AGREEMENT AND RELEASE THIS SEPARATION AGREEMENT AND RELEASE (this ?Agreement?) is made by and between David Shea (?Executive?) and Clean Diesel Technologies, Inc. (the ?Company?), together with each and every of its predecessors, successors (by merger or otherwise), parents, subsidiaries, affiliates, divisions and related entities, legal representatives, directors, officers

May 27, 2016 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): May 27, 2016 (May 25, 2016) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (

May 20, 2016 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): May 20, 2016 (May 18, 2016) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction (Commission (

May 20, 2016 EX-10.1

Clean Diesel Technologies, Inc. DIRECTOR’S CONVERTIBLE PROMISSORY NOTE (Amended and Restated Effective May 12, 2016)

Exhibit 10.1 Clean Diesel Technologies, Inc. DIRECTOR?S CONVERTIBLE PROMISSORY NOTE (Amended and Restated Effective May 12, 2016) Principal Amount US$500,000.00 Oxnard, California April 11 2016 For value received, the undersigned Clean Diesel Technologies, Inc., a Delaware corporation (?Maker?), promises to pay to Lon E. Bell, Ph.D (?Payee?), or order, the principal sum of 500 Hundred Thousand Dol

May 13, 2016 EX-99.1

CDTi Announces First Quarter Fiscal Year 2016 Financial Results

EdgarFiling EXHIBIT 99.1 CDTi Announces First Quarter Fiscal Year 2016 Financial Results OXNARD, Calif., May 13, 2016 (GLOBE NEWSWIRE) - Clean Diesel Technologies, Inc. (Nasdaq:CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, reported its financial results for the first quarter ended March 31, 2016. ?In the first quarter, we took steps to accelerate the execution

May 13, 2016 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event Reported): May 13, 2016 Clean Diesel Technologies, Inc. (Exact Name of Registrant as Specified in Charter) DELAWARE 001-33710 06-1393453 (State or Other Jurisdiction of Incorporation) (Commissio

May 13, 2016 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2016 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 0

April 19, 2016 DEFA14A

Clean Diesel Technologies DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) o Defin

April 19, 2016 DEF 14A

Clean Diesel Technologies DEF 14A

QuickLinks - Click here to rapidly navigate through this document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

April 15, 2016 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 15, 2016 (April 11, 2016) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Incorp

April 15, 2016 EX-10.1

Clean Diesel Technologies, Inc. CONVERTIBLE PROMISSORY NOTE

Exhibit 10.1 Clean Diesel Technologies, Inc. DIRECTOR’S CONVERTIBLE PROMISSORY NOTE Principal Amount US$500,000.00 Oxnard, California April 11 2016 For value received, the undersigned Clean Diesel Technologies, Inc., a Delaware corporation (“Maker”), promises to pay to Lon E. Bell, Ph.D (“Payee”), or order, the principal sum of 500 Hundred Thousand Dollars ($500,000.00), together with interest at

April 8, 2016 PRE 14A

Clean Diesel Technologies PRE 14A

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April 8, 2016 8-K

Clean Diesel Technologies FORM 8-K (Current Report/Significant Event)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event Reported): April 8, 2016 (April 5, 2016) Clean Diesel Technologies, Inc. (Exact Name of Registrant as Specified in Charter) DELAWARE 001-33710 06-1393453 (State or Other Jurisdiction of Incorpor

April 8, 2016 EX-99.1

CDTi Announces Retirement of Two Board Members Dr. Charles Engles and Bernard H. Cherry to Retire When Terms End

EdgarFiling EXHIBIT 99.1 CDTi Announces Retirement of Two Board Members Dr. Charles Engles and Bernard H. Cherry to Retire When Terms End OXNARD, Calif., April 08, 2016 (GLOBE NEWSWIRE) - Clean Diesel Technologies, Inc. (Nasdaq:CDTI) (“CDTi” or “the Company”), a leader in advanced emission control technology, received notice from board members Charles R. Engles Ph.D. and Bernard H. ("Bud") Cherry

April 7, 2016 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 7, 2016 (April 1, 2016) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) DELAWARE 001-33710 06-1393453 (State or Other Jurisdiction of Incorpor

April 7, 2016 EX-10.1

Clean Diesel Technologies, Inc. PROMISSORY NOTE

Exhibit 10.1 Clean Diesel Technologies, Inc. PROMISSORY NOTE Principal Amount US$2,000,000.00 Oxnard, California April 1, 2016 For value received, the undersigned Clean Diesel Technologies, Inc., a Delaware corporation (?Maker?), promises to pay to Kanis, S.A. (?Payee?), or order, c/o S G Associates Limited, 82Z Portland Place, London, England, W1B 1NS, the principal sum of Two Million United Stat

April 7, 2016 EX-99.1

CDTi Amends Existing Loan Agreement and Receives Additional $2 Million Loan from Kanis, S.A.

EdgarFiling EXHIBIT 99.1 CDTi Amends Existing Loan Agreement and Receives Additional $2 Million Loan from Kanis, S.A. OXNARD, Calif., April 07, 2016 (GLOBE NEWSWIRE) - Clean Diesel Technologies, Inc. (Nasdaq:CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, closed a new $2.0 million loan and amended its existing loan agreement with Kanis, S.A. The amended agreement

April 7, 2016 EX-10.2

AMENDMENT TO LOAN AGREEMENT

Exhibit 10.2 AMENDMENT TO LOAN AGREEMENT This Amendment to Loan Agreement is made between Kanis, S.A (?Lender?) and Clean Diesel Technologies, Inc. (?CDTI?) this 1st day of April 2016 with reference to the following: Lender and CDTI are parties to certain prior loan agreements and amendments as listed in the attached Exhibit A aggregating a principal balance of $7,500,000 all of which together are

April 7, 2016 8-K

Clean Diesel Technologies FORM 8-K (Current Report/Significant Event)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 7, 2016 (April 1, 2016) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Incorpor

March 30, 2016 8-K

Clean Diesel Technologies FORM 8-K (Current Report/Significant Event)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event Reported): March 30, 2016 Clean Diesel Technologies, Inc. (Exact Name of Registrant as Specified in Charter) DELAWARE 001-33710 06-1393453 (State or Other Jurisdiction of Incorporation) (Commiss

March 30, 2016 EX-99.1

CDTi Announces Fourth Quarter and Fiscal Year 2015 Financial Results – Demonstrates momentum by securing new customers in key growth markets – – Increased fourth quarter 2015 revenue 11% year-over-year – – Expanded fourth quarter gross margin to 29%,

EdgarFiling EXHIBIT 99.1 CDTi Announces Fourth Quarter and Fiscal Year 2015 Financial Results ? Demonstrates momentum by securing new customers in key growth markets ? ? Increased fourth quarter 2015 revenue 11% year-over-year ? ? Expanded fourth quarter gross margin to 29%, compared to 23% in the prior year period ? ? Provides 2016 financial outlook ? OXNARD, Calif., March 30, 2016 (GLOBE NEWSWIR

March 30, 2016 EX-21

SUBSIDIARIES OF REGISTRANT

QuickLinks - Click here to rapidly navigate through this document Exhibit 21 SUBSIDIARIES OF REGISTRANT Clean Diesel Technologies, Inc.

March 30, 2016 EX-3.1

Composite Certificate of Incorporation of the Registrant.

EXHIBIT 3.1 Composite Certificate of Incorporation of Clean Diesel Technologies, Inc. 1. The name of the corporation is Clean Diesel Technologies, Inc., hereinafter referred to as the ?corporation?. 2. The address of its registered office in the State of Delaware is Corporation Trust Center, 1209 Orange Street, in the city of Wilmington, County of New Castle. The name of its registered agent at su

March 30, 2016 EX-10.61

SEPARATION AGREEMENT AND RELEASE

Exhibit 10.61 SEPARATION AGREEMENT AND RELEASE THIS SEPARATION AGREEMENT AND RELEASE (this ?Agreement?) is made by and between Pedro J. Lopez-Baldrich (?Executive?) and Clean Diesel Technologies, Inc. (the ?Company?), together with each and every of its predecessors, successors (by merger or otherwise), parents, subsidiaries, affiliates, divisions and related entities, legal representatives, direc

March 30, 2016 EX-10.64

ADDENDUM TO EMPLOYMENT AGREEMENT

Exhibit 10.64 ADDENDUM TO EMPLOYMENT AGREEMENT This addendum (?Addendum?) to the Employment Agreement between Clean Diesel Technologies, Inc., a Delaware corporation (?CDTI? or the ?Company?) and Hans Eric Bippus (?Executive?) (inclusively, the ?Parties?) is entered into on March 29, 2016. A. The Parties entered into a written employment agreement (the ?Employment Agreement?) on July 27, 2015. B.

March 30, 2016 EX-10.63

ADDENDUM TO EMPLOYMENT AGREEMENT

Exhibit 10.63 ADDENDUM TO EMPLOYMENT AGREEMENT This addendum (?Addendum?) to the Contract of Employment between Clean Diesel Technologies, Inc., a Delaware corporation (?CDTI? or the ?Company?) and Steve Golden (?Executive?) (inclusively, the ?Parties?) is entered into on March 29, 2016. A. Catalytic Solutions, Inc., a wholly owned subsidiary of Company, and Executive entered into a written employ

March 30, 2016 EX-10.65

ADDENDUM TO EMPLOYMENT AGREEMENT

Exhibit 10.65 ADDENDUM TO EMPLOYMENT AGREEMENT This addendum (?Addendum?) to the Employment Agreement between Clean Diesel Technologies, Inc., a Delaware corporation (?CDTI? or the ?Company?) and David E. Shea (?Executive?) (inclusively, the ?Parties?) is entered into on March 29, 2016. A. The Parties entered into a written employment agreement (the ?Employment Agreement?) on December 22, 2014. B.

March 30, 2016 EX-10.62

ADDENDUM TO EMPLOYMENT AGREEMENT

Exhibit 10.62 ADDENDUM TO EMPLOYMENT AGREEMENT This addendum (“Addendum”) to the Employment Agreement between Clean Diesel Technologies, Inc., a Delaware corporation (“CDTI” or the “Company”) and Matthew Beale (“Executive”) (inclusively, the “Parties”) is entered into on March 29, 2016. A. The Parties entered into a written employment agreement (the “Employment Agreement”) on October 22, 2015. B.

March 30, 2016 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Use these links to rapidly review the document TABLE OF CONTENTS Index to Financial Statements Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

March 30, 2016 EX-10.60

SEPARATION AGREEMENT AND RELEASE

Exhibit 10.60 SEPARATION AGREEMENT AND RELEASE THIS SEPARATION AGREEMENT AND RELEASE (this “Agreement”) is made by and between Christopher J. Harris (“Executive”) and Clean Diesel Technologies, Inc. (the “Company”), together with each and every of its predecessors, successors (by merger or otherwise), parents, subsidiaries, affiliates, divisions and related entities, legal representatives, directo

February 18, 2016 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 18, 2016 (February 12, 2016) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) DELAWARE 001-33710 06-1393453 (State or Other Jurisdiction of

February 12, 2016 EX-3.1

CERTIFICATE OF AMENDMENT TO THE RESTATED CERTIFICATE OF INCORPORATION CLEAN DIESEL TECHNOLOGIES, INC.

Exhibit 3.1 CERTIFICATE OF AMENDMENT TO THE RESTATED CERTIFICATE OF INCORPORATION OF CLEAN DIESEL TECHNOLOGIES, INC. Clean Diesel Technologies, Inc., a corporation organized and existing under the General Corporation Law of the State of Delaware (the ?Corporation?), hereby does certify: FIRST: The name of the corporation is Clean Diesel Technologies, Inc. The original Certificate of Incorporation

February 12, 2016 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 12, 2016 (February 12, 2016) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) DELAWARE 001-33710 06-1393453 (State or Other Jurisdiction of

January 19, 2016 SC 13G/A

CDTI / Clean Diesel Technologies, Inc. / Empery Asset Management, LP - CLEAN DIESEL TECHNOLOGIES, INC. Passive Investment

SC 13G/A 1 p16-0130sc13ga.htm CLEAN DIESEL TECHNOLOGIES, INC. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Clean Diesel Technologies, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 18449C401 (CUSIP Number) December 31, 2015 (Date of event which requires filing of this statemen

January 4, 2016 DEF 14A

Clean Diesel Technologies DEF 14A

QuickLinks - Click here to rapidly navigate through this document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

December 21, 2015 PRE 14A

Clean Diesel Technologies PRE 14A

QuickLinks - Click here to rapidly navigate through this document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

December 11, 2015 8-K

Clean Diesel Technologies 8-K (Current Report/Significant Event)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 9, 2015 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Incorporation) (Commi

December 11, 2015 EX-99.1

CDTi Streamlines Operations with Closure of Canadian Manufacturing Facility — Repositions operating footprint around advanced materials strategy — — Expects to save approximately $3 million in annual costs — — Reduces overhead to drive profitable gro

Exhibit 99.1 CDTi Streamlines Operations with Closure of Canadian Manufacturing Facility — Repositions operating footprint around advanced materials strategy — — Expects to save approximately $3 million in annual costs — — Reduces overhead to drive profitable growth and increase shareholder value — Oxnard, California — Dec. 11, 2015 — Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (“CDTi” or “the

November 27, 2015 8-K

Clean Diesel Technologies 8-K (Current Report/Significant Event)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 27, 2015 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Incorporation) (Comm

November 24, 2015 424B5

Explanatory Note

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS Explanatory Note This filing is made solely to correct a typographical error relating to the aggregate number of shares of common stock and Series B pre-funded warrants on the cover page of the prospectus.

November 23, 2015 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 23, 2015 CLEAN DIESEL TE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 23, 2015 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Incorporation) (Comm

November 23, 2015 424B5

PRELIMINARY PROSPECTUS SUPPLEMENT SUBJECT TO COMPLETION, DATED NOVEMBER 23, 2015

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS Table of Contents The information contained in this preliminary prospectus supplement is not complete and may be changed.

November 23, 2015 EX-4.2

FORM OF WARRANT

Exhibit 4.2 FORM OF WARRANT THE NUMBER OF SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE OF THIS WARRANT MAY BE LESS THAN THE AMOUNTS SET FORTH ON THE FACE HEREOF PURSUANT TO SECTION 1(a) OF THIS WARRANT. CLEAN DIESEL TECHNOLOGIES, INC. PRE-FUNDED SERIES B WARRANT TO PURCHASE COMMON STOCK Warrant No.: Date of Issuance: [ ], 2015 (“Issuance Date”) Clean Diesel Technologies, Inc., a Delaware corporat

November 23, 2015 424B5

CLEAN DIESEL TECHNOLOGIES, INC. 883,862 Shares of Common Stock Series B Pre-funded Warrants to Purchase 1,686,138 Shares of Common Stock

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No.

November 23, 2015 EX-99.1

CDTi to Raise Approximately $3.1 Million

Exhibit 99.1 CDTi to Raise Approximately $3.1 Million Oxnard, California — Nov. 23, 2015 — Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (“CDTi” or “the Company”) announced it is raising approximately $3.1 million in gross proceeds in a registered offering and a concurrent private placement to institutional investors. The Company is selling 883,862 shares of common stock and pre-funded warrants t

November 23, 2015 EX-4.3(C)

FORM OF WARRANT

Exhibit 4.3(c) FORM OF WARRANT NEITHER THE ISSUANCE AND SALE OF THE SECURITIES REPRESENTED BY THIS CERTIFICATE NOR THE SECURITIES INTO WHICH THESE SECURITIES ARE EXERCISABLE HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED (I) IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRAT

November 23, 2015 EX-10.2

SECURITIES PURCHASE AGREEMENT

Exhibit 10.2 SECURITIES PURCHASE AGREEMENT This SECURITIES PURCHASE AGREEMENT (the ?Agreement?), dated as of November 23, 2015, is by and among Clean Diesel Technologies Inc., a Delaware corporation with offices located at 1621 Fiske Place, Oxnard, CA 93033 (the ?Company?), and each of the investors listed on the Schedule of Buyers attached hereto (individually, a ?Buyer? and collectively, the ?Bu

November 23, 2015 EX-4.3(A)

FORM OF WARRANT

Exhibit 4.3(a) FORM OF WARRANT NEITHER THE ISSUANCE AND SALE OF THE SECURITIES REPRESENTED BY THIS CERTIFICATE NOR THE SECURITIES INTO WHICH THESE SECURITIES ARE EXERCISABLE HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED (I) IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRAT

November 23, 2015 EX-4.1

FORM OF WARRANT

Exhibit 4.1 FORM OF WARRANT NEITHER THE ISSUANCE AND SALE OF THE SECURITIES REPRESENTED BY THIS CERTIFICATE NOR THE SECURITIES INTO WHICH THESE SECURITIES ARE EXERCISABLE HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED (I) IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRATION

November 23, 2015 EX-4.3(B)

FORM OF WARRANT

Exhibit 4.3(b) FORM OF WARRANT NEITHER THE ISSUANCE AND SALE OF THE SECURITIES REPRESENTED BY THIS CERTIFICATE NOR THE SECURITIES INTO WHICH THESE SECURITIES ARE EXERCISABLE HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED (I) IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRAT

November 23, 2015 EX-10.1

CLEAN DIESEL TECHNOLOGIES INC. 883,862 shares of Common Stock Series B Pre-Funded Warrants to Purchase 1,686,138 shares of Common Stock and Series A Warrants to Purchase 771,000 shares of Common Stock PLACEMENT AGENT AGREEMENT

Exhibit 10.1 CLEAN DIESEL TECHNOLOGIES INC. 883,862 shares of Common Stock Series B Pre-Funded Warrants to Purchase 1,686,138 shares of Common Stock and Series A Warrants to Purchase 771,000 shares of Common Stock PLACEMENT AGENT AGREEMENT November 23, 2015 OPPENHEIMER & CO. INC. 85 Broad Street New York, NY 10004 Dear Sirs: 1. INTRODUCTION. Clean Diesel Technologies Inc., a Delaware corporation (

November 16, 2015 CORRESP

Clean Diesel Technologies ESP

November 16, 2015 Via EDGAR Securities and Exchange Commission Division of Corporation Finance 100 F Street, NE Washington, DC 20549-4561 Attn: Mr.

November 13, 2015 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

Form 8-K Filing UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event Reported): November 13, 2015 Clean Diesel Technologies, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Inco

November 13, 2015 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2015 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Numbe

November 13, 2015 EX-10.3

EMPLOYMENT AGREEMENT

Exhibit 10.3 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (“Agreement”) is made as of October 22, 2015 (the “Effective Date”) by and between Clean Diesel Technologies, Inc., a Delaware corporation (“CDTI” or the “Company”), and Matthew Beale (“Executive”). WHEREAS, CDTI and Executive desire to enter into an agreement setting forth the terms and conditions of Executive’s employment with CDTI; NOW

November 13, 2015 EX-99

CDTi Announces Third Quarter 2015 Financial Results

CDTi Announces Third Quarter 2015 Financial Results EXHIBIT 99.1 CDTi Announces Third Quarter 2015 Financial Results Announces Business Transformation Initiative to Drive Profitability Reaffirms Full Year 2015 Financial Guidance OXNARD, Calif., Nov. 13, 2015 (GLOBE NEWSWIRE) - Clean Diesel Technologies, Inc. (Nasdaq:CDTI) ("CDTi" or "the Company"), a leader in advanced emission control technology,

November 10, 2015 S-3/A

Clean Diesel Technologies S-3/A

QuickLinks - Click here to rapidly navigate through this document As filed with the Securities and Exchange Commission on November 10, 2015 Registration No.

October 22, 2015 EX-99

CDTi Appoints Matthew Beale as CEO

CDTi Appoints Matthew Beale as CEO EXHIBIT 99.1 CDTi Appoints Matthew Beale as CEO - Automotive industry executive brings extensive international cleantech leadership experience - - Chris Harris will continue as President and become COO - OXNARD, Calif., Oct. 22, 2015 (GLOBE NEWSWIRE) - Clean Diesel Technologies, Inc. (Nasdaq:CDTI) ("CDTi" or "the Company"), a leader in advanced emission control t

October 22, 2015 8-K

Clean Diesel Technologies FORM 8-K FILING DOCUMENT (Current Report/Significant Event)

Form 8-K Filing UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event Reported): October 22, 2015 (October 19, 2015) Clean Diesel Technologies, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Ju

October 13, 2015 EX-99.1

CDTi Amends Loan Agreements to Extend Maturity Date

CDTi Amends Loan Agreements to Extend Maturity Date EXHIBIT 99.1 CDTi Amends Loan Agreements to Extend Maturity Date OXNARD, Calif., Oct. 13, 2015 (GLOBE NEWSWIRE) - Clean Diesel Technologies, Inc. (Nasdaq:CDTI) ("CDTi" or "the Company"), a leader in advanced emission control technology, announced it has amended its loan agreements with Kanis SA to extend the maturity dates to October 1, 2018. The

October 13, 2015 8-K

Clean Diesel Technologies FORM 8-K (Current Report/Significant Event)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 7, 2015 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Incorporation) (Commis

October 13, 2015 EX-10.1

Revised Expiration Date

Exhibit 10.1 This letter agreement is between Kanis SA of P O Box 986, Third Floor, Geneva Place Road Town, Tortola British Virgin Islands VG1110 and Clean Diesel Technologies, Inc. of 1621 Fiske Place Oxnard, CA 93033 USA made 7th October 2015. The following documents the agreed-to changes in terms for the loans from Kanis SA to Clean Diesel Technologies, Inc. Loan Principal Interest Rate Current

August 7, 2015 S-8 POS

Clean Diesel Technologies FORM S-8 POS

Post-Effective Amendment No. 1 As filed with the Securities and Exchange Commission on August 7, 2015 Registration No. 333-182009 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 _ Post-Effective Amendment No. 1 to FORM S-8 REGISTRATION STATEMENT Under the Securities Act of 1933 _ CLEAN DIESEL TECHNOLOGIES, INC. (Exact name of registrant as specified in its charter) _ Delaware

August 7, 2015 S-8

Clean Diesel Technologies FORM S-8

FORM S-8 As filed with the Securities and Exchange Commission on August 7, 2015 Registration No.

August 6, 2015 EX-10.2

NORTH AMERICAN PURCHASE AND SALE AGREEMENT

EXHIBIT 10.2 Rev. 4/01/2014 NORTH AMERICAN PURCHASE AND SALE AGREEMENT This North American Purchase and Sale Agreement ("Agreement") is between Honda North America, Inc., Inc. ("HNA") and each of the other Honda Companies named on Attachment 1 (each, individually, "Buyer") and each of the Seller Companies named below (each, individually, "Seller"). The Agreement includes each of the following, as

August 6, 2015 EX-99.1

CDTi Announces Second Quarter 2015 Financial Results Accelerates commercialization of advanced materials technologies Reaffirms full year 2015 financial guidance

EXHIBIT 99.1 EXHIBIT 99.1 CDTi Announces Second Quarter 2015 Financial Results Accelerates commercialization of advanced materials technologies Reaffirms full year 2015 financial guidance Oxnard, California ? Aug. 6, 2015 ? Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, reported financial results for the second quarter en

August 6, 2015 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2015 or o TRANSITION REPORT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2015 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-33710 CLEAN DIES

August 6, 2015 8-K

Current Report

Form 8K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 6, 2015 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Incorporation)

August 6, 2015 EX-10.3

EMPLOYMENT AGREEMENT

EXHIBIT 10.3 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (“Agreement”) is made as of July 27, 2015 (the “Effective Date”) by and between Clean Diesel Technologies, Inc., a Delaware corporation (“CDTI” or the “Company”), and Hans Eric Bippus (“Executive”). WHEREAS, CDTI and Executive desire to enter into an agreement setting forth the terms and conditions of Executive’s employment with CDTI; NOW

August 3, 2015 EX-24

POWER OF ATTORNEY

POWER OF ATTORNEY POWER OF ATTORNEY Know all by these presents that the undersigned hereby constitutes and appoints each Pedro J.

June 11, 2015 8-K

Entry into a Material Definitive Agreement

FORM 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 11, 2015 (June 5, 2015) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of

June 5, 2015 424B5

EXPLANATORY NOTE

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS EXPLANATORY NOTE This filing is made solely to revise the footnote to the table set forth in the section entitled "Capitalization" in order to clarify that the warrants issued in the offering are classified in stockholders' equity.

June 5, 2015 8-K/A

Clean Diesel Technologies 8-K/A (Current Report/Significant Event)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 2, 2015 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Incor

June 5, 2015 EX-1.1

CLEAN DIESEL TECHNOLOGIES, INC. 2,500,000 Units Each Consisting of One Share of Common Stock and 0.2 of a Warrant to Purchase One Share of Common Stock UNDERWRITING AGREEMENT

Exhibit 1.1 CLEAN DIESEL TECHNOLOGIES, INC. 2,500,000 Units Each Consisting of One Share of Common Stock and 0.2 of a Warrant to Purchase One Share of Common Stock UNDERWRITING AGREEMENT June 2, 2015 COWEN AND COMPANY, LLC 599 Lexington Avenue New York, New York 10022 Dear Sirs: 1. INTRODUCTORY. Clean Diesel Technologies, Inc., a Delaware corporation (the ?Company?), proposes to sell, pursuant to

June 4, 2015 SC 13G

CDTI / Clean Diesel Technologies, Inc. / Empery Asset Management, LP - CLEAN DIESEL TECHNOLOGIES, INC. Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Clean Diesel Technologies, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 18449C401 (CUSIP Number) June 2, 2015 (Date of event which requires filing of this statement) Check the appropriate box to designate the rule pursuant to which

June 3, 2015 8-K

Clean Diesel Technologies 8-K (Current Report/Significant Event)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 2, 2015 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Incorporation) (Commissio

June 3, 2015 EX-99.1

CDTi to Raise Approximately $5.1 Million

Exhibit 99.1 CDTi to Raise Approximately $5.1 Million Oxnard, California ? June 3, 2015 ? Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (?CDTi? or ?the Company?) today announced that it is raising approximately $5.1 million in gross proceeds in an underwritten public offering of 2,500,000 common stock units at a purchase price of $2.05 per unit. Each unit will consist of one share of the Company?

June 3, 2015 EX-4.1

[FORM OF WARRANT]

Exhibit 4.1 [FORM OF WARRANT] THE NUMBER OF SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE OF THIS WARRANT MAY BE LESS THAN THE AMOUNTS SET FORTH ON THE FACE HEREOF PURSUANT TO SECTION 1(a) OF THIS WARRANT. CLEAN DIESEL TECHNOLOGIES, INC. WARRANT TO PURCHASE COMMON STOCK Warrant No.: Date of Issuance: [ ], 2015 (“Issuance Date”) Clean Diesel Technologies, Inc., a Delaware corporation (the “Company”

June 3, 2015 EX-1.1

CLEAN DIESEL TECHNOLOGIES, INC. 2,500,000 Units Each Consisting of One Share of Common Stock and 0.2 of a Warrant to Purchase One Share of Common Stock UNDERWRITING AGREEMENT

Exhibit 1.1 CLEAN DIESEL TECHNOLOGIES, INC. 2,500,000 Units Each Consisting of One Share of Common Stock and 0.2 of a Warrant to Purchase One Share of Common Stock UNDERWRITING AGREEMENT June 2, 2015 COWEN AND COMPANY, LLC 599 Lexington Avenue New York, New York 10022 Dear Sirs: 1. INTRODUCTORY. Clean Diesel Technologies, Inc., a Delaware corporation (the “Company”), proposes to sell, pursuant to

June 3, 2015 424B5

SUBJECT TO COMPLETION, DATED JUNE 2, 2015

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No.

June 3, 2015 424B5

CLEAN DIESEL TECHNOLOGIES, INC. 2,500,000 Common Stock Units Consisting of One Share of Common Stock and 0.2 of a Warrant to Purchase One Share of Common Stock

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No.

May 21, 2015 8-K

Submission of Matters to a Vote of Security Holders

FORM 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 21, 2015 (May 20, 2015) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) DELAWARE 001-33710 06-1393453 (State or Other Jurisdiction of I

May 19, 2015 S-3

Clean Diesel Technologies S-3

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents As filed with the Securities and Exchange Commission on May 19, 2015 Registration No.

May 19, 2015 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

FORM 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 19, 2015 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) DELAWARE 001-33710 06-1393453 (State or Other Jurisdiction of Incorporation) (

May 19, 2015 EX-99.2

EX-99.2

Exhibit 99.2 Exhibit 99.2

May 19, 2015 EX-99.1

CDTi to Present at the 2015 JSAE Annual Congress in Pacifico Yokohama, Japan

EXHIBIT 99.1 Exhibit 99.1 CDTi to Present at the 2015 JSAE Annual Congress in Pacifico Yokohama, Japan Oxnard, California ? May 19, 2015 - Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, announced it will participate at the 2015 JSAE Annual Congress on May 22nd at the Pacifico Yokohama Conference Center in Pacifico Yokoham

May 12, 2015 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

FORM 8K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 12, 2015 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Incorporation) (C

May 12, 2015 EX-99.1

CDTi Announces First Quarter 2015 Financial Results Demonstrates traction in the DPF replacement market and broadens catalyst portfolio Holds conference call today, May 12th, at 8:00 a.m. Pacific Time

Exhibit 99.1 Exhibit 99.1 CDTi Announces First Quarter 2015 Financial Results Demonstrates traction in the DPF replacement market and broadens catalyst portfolio Holds conference call today, May 12th, at 8:00 a.m. Pacific Time Oxnard, California – May 12, 2015–Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (“CDTi” or “the Company”), a leader in advanced emission control technology, reported financ

May 12, 2015 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2015 o TRANSITION REPORT P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2015 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-33710 CLEAN DIE

April 22, 2015 EX-99.2

EX-99.2

CDTIExhibit99.2 Exhibit 99.2

April 22, 2015 EX-99.1

CDTi Outlines Development of Spinel™ Technology Platform at SAE 2015 World Congress and Exhibition

EXHIBIT 99.1 Exhibit 99.1 CDTi Outlines Development of Spinel? Technology Platform at SAE 2015 World Congress and Exhibition Oxnard, California ? April 22, 2015 - Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, will participate in the SAE 2015 World Congress today in Detroit, Michigan where Chief Technology Officer, Stephe

April 22, 2015 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

FORM 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 22, 2015 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) DELAWARE 001-33710 06-1393453 (State or Other Jurisdiction of Incorporation)

April 2, 2015 DEF 14A

Clean Diesel Technologies DEF 14A

DEF 14A 1 def14acdti.htm DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission On

April 2, 2015 DEFA14A

Clean Diesel Technologies DEFA14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the SecuritiesExchange Act Of 1934 Filed by the Registrant ?Filed by a Party other than the Registrant oCheck the appropriate box: o Preliminary Proxy Statement o Confidential, For Use Of The Commission Only (as Permitted By Rule 14a-6(e)(2)) o Definitive Proxy Statement ? Definitive Additional Materials o Soliciting Material Pursuant to ?240.

March 18, 2015 10-K

Overview

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K [X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended: December 31, 2014 or [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No.: 001-33710 CLEAN DIESEL TECHNOLOGI

March 18, 2015 EX-10.44

TKK-CDTi Addendum Agreement

EXHBIT 10.44 TKK-CDTi Addendum Agreement This Addendum is hereby made and entered into this 13 day of March, 2015, by and between: Tanaka Holdings Co., Ltd (formerly Tanaka Holdings Kabushiki Kaisha (K.K.)) and Tanaka Kikinzoku Kogyo K. K. (collectively, “TKK”), and TC Catalyst, Inc. (“TCC”) and Catalytic Solutions, Inc. (together with its affiliates, “CDTi”) Reference is made to the parties’ Purc

March 18, 2015 EX-10.18

COMMON STOCK PURCHASE WARRANT CLEAN DIESEL TECHNOLOGIES, INC.

EXHIBIT 10.18 THIS WARRANT HAS NOT BEEN AND WILL NOT REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE HOLDER HEREOF, BY PURCHASING THIS WARRANT, AGREES FOR THE BENEFIT OF THE COMPANY THAT THIS WARRANT MAY NOT BE OFFERED, SOLD, PLEDGED, OR OTHERWISE TRANSFERRED BY SUCH HOLDER PRIOR TO THE LATER OF THE (X) SIX MONTHS FOLLOWING THE ISSUANCE HEREOF OR (

March 18, 2015 EX-21

SUBSIDIARIES OF REGISTRANT

Exhibit 21 SUBSIDIARIES OF REGISTRANT Clean Diesel Technologies, Inc.'s subsidiaries as of December 31, 2014 are listed below. Name of Subsidiary State/Jurisdiction of Incorporation Common Equity Ownership Clean Diesel Technologies Limited United Kingdom 100% Catalytic Solutions, Inc. California 100% CSI Aliso, Inc. California 100% Catalytic Solutions Holdings, Inc. Delaware 100% ECS Holdings, Inc

March 18, 2015 EX-10.17

Interest Rate

EXHIBIT 10.17 Kanis SA Dear Dr. Kanis, The following documents the agreed to changes in terms for the loans from Kanis SA to Clean Diesel Technologies, Inc. Loan Principal Interest Rate Current Maturity Date Other Features Revised Terms 1 $1,500,000 8% June 30, 2015 Payment Premium of $150,000 due at maturity Maturity Date and Payment Premium Revised to 10/1/2016. 2 $3,000,000 8% April 11, 2016 Co

March 18, 2015 EX-3.1

Restated Certificate of Incorporation Clean Diesel Technologies, Inc. As Amended Through May 23, 2012

EXHIBIT 3.1 Restated Certificate of Incorporation of Clean Diesel Technologies, Inc. As Amended Through May 23, 2012 1. The name of the corporation is Clean Diesel Technologies, Inc., hereinafter referred to as the “corporation”. 2. The address of its registered office in the State of Delaware is Corporation Trust Center, 1209 Orange Street, in the city of Wilmington, County of New Castle. The nam

March 17, 2015 EX-99.1

CDTi Announces Fourth Quarter and Fiscal Year 2014 Financial Results Reports Significant Commercialization Progress and Technology Advances Holds Conference Call Today, March 17th, at 8:00 a.m. Pacific Time

EXHIBIT 99.1 EXHIBIT 99.1 CDTi Announces Fourth Quarter and Fiscal Year 2014 Financial Results Reports Significant Commercialization Progress and Technology Advances Holds Conference Call Today, March 17th, at 8:00 a.m. Pacific Time Oxnard, California ? March 17, 2015 ? Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (?CDTi? or ?the Company?), a leader in advanced emission control technology, repor

March 17, 2015 8-K

Clean Diesel Technologies FORM 8-K (Current Report/Significant Event)

cdti8k2014earningsre UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

February 26, 2015 SC 13D/A

CDTI / Clean Diesel Technologies, Inc. / RockPort Capital Partners, L.P. - SCHEDULE 13D AMENDMENT NO. 2 Activist Investment

Schedule 13D Amendment No. 2 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2) Clean Diesel Technologies, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 18449C 401 (CUSIP Number) Mr. Alexander Ellis, III RockPort Capital Partners, L.P. 160 Federal Street, 18th Floor Boston

February 13, 2015 SC 13G/A

CDTI / Clean Diesel Technologies, Inc. / Kanis S.A. - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.

February 11, 2015 EX-99.1

CDTi Appoints International Automotive Industry Veteran Dr. Till Becker to its Board of Directors

Exhibit 99.1 CDTi Appoints International Automotive Industry Veteran Dr. Till Becker to its Board of Directors Oxnard, California – February 11, 2015 - Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (“CDTi” or “the Company”), a leader in advanced emission control technology, appointed Dr. Till Becker to the Company’s Board of Directors, effective February 9, 2015, increasing the number of director

February 11, 2015 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 11, 2015 (February 9, 2015) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) DELAWARE 001-33710 06-1393453 (State or Other Jurisdiction of I

January 12, 2015 SC 13G/A

CDTI / Clean Diesel Technologies, Inc. / Empery Asset Management, LP - CLEAN DIESEL TECHNOLOGIES, INC. Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Clean Diesel Technologies, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 18449C401 (CUSIP Number) December 31, 2014 (Date of event which requires filing of this statement) Check the appropriate box to designate the rule pursuant

December 23, 2014 EX-10.2

AMENDED AND RESTATED EMPLOYMENT AGREEMENT

Exhibit 10.2 AMENDED AND RESTATED EMPLOYMENT AGREEMENT THIS AMENDED AND RESTATED EMPLOYMENT AGREEMENT (“Agreement”) is made as of December 22, 2014 (the “Effective Date”) by and between Clean Diesel Technologies, Inc., a Delaware corporation (“CDTI” or the “Company”), and Christopher J. Harris (“Executive”). WHEREAS, CDTI and Executive desire to enter into an agreement setting forth the terms and

December 23, 2014 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 23, 2014 (December 22, 2014) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of

December 23, 2014 EX-10.1

EMPLOYMENT AGREEMENT

Exhibit 10.1 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (“Agreement”) is made as of December 22, 2014 (the “Effective Date”) by and between Clean Diesel Technologies, Inc., a Delaware corporation (“CDTI” or the “Company”), and David E. Shea (“Executive”). WHEREAS, CDTI and Executive desire to enter into an agreement setting forth the terms and conditions of Executive’s employment with CDTI; NO

November 13, 2014 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 13, 2014 (November 11, 2014) CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of

November 13, 2014 EX-99.1

CDTi AMENDS LOAN AGREEMENTS WITH LONG-TIME INVESTOR TO EXTEND MATURITY DATE

EXHIBIT 99.1 CDTi AMENDS LOAN AGREEMENTS WITH LONG-TIME INVESTOR TO EXTEND MATURITY DATE Oxnard, California – November 13, 2014 - Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (“CDTi” or “the Company”), a leader in advanced emission control technology, announced it has amended all loan agreements with Kanis S.A. to extend the maturity dates to October 1, 2016. In addition, the $3 million Converti

November 7, 2014 EX-99.1

CDTi Reports Third Quarter 2014 Financial Results

EXHIBIT 99.1 CDTi Reports Third Quarter 2014 Financial Results Oxnard, Calif., November 7, 2014 - Clean Diesel Technologies, Inc. (Nasdaq: CDTI) (“CDTi” or the “Company”), a leader in advanced emission control solutions, reported financial results for the third quarter ended September 30, 2014. “While our third quarter results were lower than expected, I am encouraged by the significant progress w

November 7, 2014 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 7, 2014 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Incorporation) (Commi

November 7, 2014 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 7, 2014 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Incorporation) (Commi

November 7, 2014 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2014 o TRANSITION REPO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2014 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-33710 CLEAN

November 7, 2014 SC 13G

CDTI / Clean Diesel Technologies, Inc. / Empery Asset Management, LP - CLEAN DIESEL TECHNOLOGIES, INC. Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Clean Diesel Technologies, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 18449C401 (CUSIP Number) November 4, 2014 (Date of event which requires filing of this statement) Check the appropriate box to designate the rule pursuant to w

November 4, 2014 EX-4.2

FORM OF SERIES B WARRANT CLEAN DIESEL TECHNOLOGIES, INC. Warrant To Purchase Common Stock

EX-4.2 Exhibit 4.2 FORM OF SERIES B WARRANT CLEAN DIESEL TECHNOLOGIES, INC. Warrant To Purchase Common Stock Warrant No.: Number of Shares of Common Stock: Date of Issuance: November , 2014 (“Issuance Date”) Clean Diesel Technologies, Inc., a corporation existing under the laws of Delaware (the “Company”), hereby certifies that, for good and valuable consideration, the receipt and sufficiency of w

November 4, 2014 EX-10.2

CLEAN DIESEL TECHNOLOGIES INC. 1,385,000 shares of Common Stock Series A Warrants to Purchase 388,393 shares of Common Stock Series B Warrants to Purchase 168,571 shares of Common Stock PLACEMENT AGENT AGREEMENT

EX-10.2 Exhibit 10.2 CLEAN DIESEL TECHNOLOGIES INC. 1,385,000 shares of Common Stock Series A Warrants to Purchase 388,393 shares of Common Stock and Series B Warrants to Purchase 168,571 shares of Common Stock PLACEMENT AGENT AGREEMENT November 4, 2014 Cowen and Company LLC 599 Lexington Avenue New York, New York 10022 Dear Sirs: 1. INTRODUCTION. Clean Diesel Technologies Inc., a Delaware corpora

November 4, 2014 EX-4.1

FORM OF SERIES A WARRANT CLEAN DIESEL TECHNOLOGIES, INC. Warrant To Purchase Common Stock

EX-4.1 Exhibit 4.1 FORM OF SERIES A WARRANT CLEAN DIESEL TECHNOLOGIES, INC. Warrant To Purchase Common Stock Warrant No.: Number of Shares of Common Stock: Date of Issuance: November , 2014 (“Issuance Date”) Clean Diesel Technologies, Inc., a corporation existing under the laws of Delaware (the “Company”), hereby certifies that, for good and valuable consideration, the receipt and sufficiency of w

November 4, 2014 EX-10.1

4 ANNEX I TERMS AND CONDITIONS FOR PURCHASE OF SECURITIES

EX-10.1 Exhibit 10.1 . 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

November 4, 2014 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 4, 2014 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) Delaware 001-33710 06-1393453 (State or Other Jurisdiction of Incorporatio

November 4, 2014 EX-99.1

CDTi to Raise Approximately $4.4 Million

EX-99.1 Exhibit 99.1 CDTi to Raise Approximately $4.4 Million Oxnard, CA - November 4, 2014 - Clean Diesel Technologies, Inc. (NASDAQ:CDTI) (“CDTi” or the “Company”) today announced that it has raised approximately $4.4 million in gross proceeds in an offering of shares of its common stock and warrants to a single institutional investor. The investor is acquiring 1,553,571 shares of common stock f

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