United States
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
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SCHEDULE 14A
Proxy Statement Pursuant to Section 14(a)
of the Securities Exchange Act of 1934
(Amendment No. )
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¨ | Preliminary Proxy Statement | |||||||
¨ | Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2)) | |||||||
¨ | Definitive Proxy Statement | |||||||
x | Definitive Additional Materials | |||||||
¨ | Soliciting Material Pursuant to §240.14a-12 |
Advanced Emissions Solutions, Inc.
(Name of registrant as specified in its charter)
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)
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¨ | Fee paid previously with preliminary materials. | ||||
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