What financial metric did Aemetis, Inc. report in this announcement, and on which stock exchange is it listed?

Aemetis, Inc. reported its pretax income, as stated in the article: 'This article provides financial information for Aemetis, Inc. (HAN:DW51) on the Hannover Stock Exchange. It specifically highlights the company's pretax income'. The company is listed under the ticker symbol HAN:DW51 on the Hannover Stock Exchange.

Was trading activity occurring for Aemetis, Inc. shares at the time of this report?

No, trading was not occurring at the time of the report, as explicitly noted: 'the market is currently closed with no trades'. This indicates that the Hannover Stock Exchange was closed, and therefore no transactions involving Aemetis, Inc. shares (HAN:DW51) were taking place when the announcement was issued.