ACM Research's preliminary update comes with a reporting boundary
The parent and its Shanghai subsidiary publish different sets of accounts. An ownership percentage cannot turn one statement into the other.
Before putting two earnings releases side by side, check whether they describe the same business on the same accounting basis. ACM Research's latest update makes that a practical question for semiconductor investors.
ACM Research (Nasdaq: ACMR) said in its October 28 announcement that preliminary, unaudited third-quarter revenue is expected at $360 million to $365 million. The company put the corresponding year-over-year increase at 34% to 36%.
Two reporting boundaries
The announcement coincides with results from ACM Shanghai, its principal operating subsidiary. ACM says it held a 73.2% equity interest in that business as of June 30, 2026.
That stake is useful context, but it is not a shortcut for converting the subsidiary's published results into the parent's figures. Ownership and the scope of a financial statement answer different questions.
ACM identifies two further differences: Shanghai reports in renminbi under Chinese accounting standards, while the parent's consolidated results use US dollars and US accounting standards. The parent also includes additional financial and operational items. The company warns that the two sets of results can differ materially.
Ask for a bridge before drawing a conclusion
A currency conversion alone would address only the currency difference. Multiplying a subsidiary number by the ownership percentage would not explain the other reporting differences that ACM identifies. A convincing comparison needs an actual reconciliation, with matching periods and clearly labeled measures.
For now, the parent update remains preliminary. Closing procedures and the independent accountant's review are still pending, according to ACM. Full third-quarter results and the remaining-year revenue outlook are scheduled for discussion on November 5.
The next useful check is whether those fuller disclosures explain the relationship between the two reporting scopes. Until then, treating a subsidiary result as a ready-made parent earnings estimate would create precision the announcement does not provide.