Our company trades on the NASDAQ Global Market under the ticker symbol "ADES".

We have approximately 27 million shares of common stock outstanding. The number of shares outstanding at any point in time fluctuates slightly as a result of the exercise of stock options or upon the forfeiture of restricted stock awards. However, the number of outstanding options and unvested restricted stock awards is not material to the overall number of shares outstanding. A more precise number of shares outstanding can be obtained by reviewing our most current annual or quarterly SEC filing.

We have approximately 5 million shares of preferred stock outstanding. Please see more information on the terms of the preferred stock in our SEC filings.

Shares of our common stock may be purchased by individuals or through licensed brokers using the public market. We do not sell shares of our common stock directly to investors.

Computershare serves as our transfer agent. If you are a registered shareholder, they can help you with a variety of shareholder-related services, such as replacing a lost stock certificate, transferring the ownership of your shares, updating your mailing address for future shareholder communications, etc. You may contact Computershare online by visiting their website (www.computershare.com) or by telephone by calling 1-800-962-4284

Financial information and/or copies of our quarterly /annual financial statements can be obtained by clicking on the link provided below or by visiting the SEC website (www.sec.gov) .

Information regarding our senior management team, as well as the current composition of our board of directors and their respective professional qualifications, is provided through the links below. This information is also contained in our annual proxy, which can be viewed online by visiting the SEC website (www.sec.gov).

Our corporate headquarters are located at 8051 E. Maplewood Ave, Suite 210, Greenwood Village, CO 80111. All written correspondence should be sent to this address. To contact us via phone, please dial 720-598-3500. You may also contact us through our website (www.advancedemissionssolutions.com).

Our independent registered public accounting firm is Moss Adams LLP.

If you have a concern regarding alleged Misconduct, you should report it promptly to the Company’s independent Whistleblower Hotline at 1-844-490-0002, Website URL (www.lighthouse-services.com/ades) or email reports@lighthouse-services.com (must include company name with report). You may submit concerns anonymously or on a confidential basis. Anonymous calls are transcribed by the Hotline vendor prior to sending to defined ADES Complaint recipients for review and resolution. If the individual filing the Complaint does not provide a means to respond to the Complaint, the Company will not be required to take additional steps to respond. All Complaints will be kept confidential to the fullest extent reasonably practicable within the requirements of the law and the needs of any ensuing evaluation or investigation.

For information related to Investor Relations, please contact Ryan Coleman or Chris Hodges at Alpha IR Group at 312-445-2870 . For general matters, contact 720-598-3500 or contactus@adaes.com.