 Los Angeles, California--Newsfile Corp. - February 18, 2021 - The Schall Law Firm, a national shareholder rights litigation firm, announces the filing of a class action lawsuit against ACM Research, Inc. ACM Research or the Company NASDAQ: ACMR for violations of 10b and 20a of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder by the U.S. Securities and Exchange Commission.Investors who purchased the Companys securities between March 6, 2019 and October 7,... 