ACMR · ACM Research, Inc.

ACM Research, Inc. announced a registered direct offering through a Securities Purchase Agreement dated May 12, 2026, with U.S. institutional investors managed by Tekne Capital Management, LLC. The transaction involves issuing 2,884,615 shares of Class A common stock, par value $0.0001 per share, at $52.00 per share, generating gross proceeds of $149,999,980. After deducting estimated offering expenses, net proceeds are expected to be approximately $149,849,980. These funds will support U.S. and global expansion alongside general corporate purposes, signaling strategic growth initiatives. The offering utilizes an effective shelf registration statement on Form S-3 (File No. 333-278041) with a prospectus supplement filed on the same date. Closing is anticipated on or about May 15, 2026, contingent on standard closing conditions. A key protective term is a 6-month lock-up on the Company’s Class A common stock and certain securities, subject to waiver by the investors’ advisor, which limits near-term selling pressure. K&L Gates LLP provided a legal opinion (Exhibit 5.1) confirming the shares’ validity when issued. The Purchase Agreement (Exhibit 10.1) includes standard representations, warranties, and covenants. This capital raise provides significant liquidity for expansion without dilution from unregistered securities, enhancing financial flexibility for investors.