BestStocksBeta
Market closed · After hours · 6:11 PM ET
Last update: Oct 16, 2026, 6:10 PM ET
ACM Research, Inc.
$53.10▼ 8.59% today
After Hours

Why ACM Research, Inc. (ACMR) stock moved

Updated Oct 16, 2026

ACM Research, Inc. (ACMR) shares tumbled 8.6% to $53.10 as of October 16, 2026, a significant decline from the prior close of $58.09. BestStocks flagged the session as a major change for ACMR. The move is tied to price move down. Below, we break down what changed for ACMR, why it matters for investors, how the stock reacted, and the catalysts on the calendar.

What happened

ACMR fell 8.6% to $53.10

ACM Research, Inc. (ACMR) moved -7.45% from $57.38 to $53.10 on 2026-10-16. No company-specific catalyst was found. The decline occurred amid a broader semiconductor equipment sector sell-off driven by macro caution and profit-taking after ACMR hit a 52-week high of $127.19 in June 2026. The stock's high beta amplified losses during the risk-off environment. Q3 2026 earnings announcement on 2026-11-04 and the company's guidance on AI infrastructure and equipment demand.

This summary describes the catalyst and move as first detected on Oct 16, 2026, 4:40 PM EDT; the stock has continued trading since, so the current price and percentage move (shown above) may be larger or smaller than the figures here.
Material / EarningsMedium confidence
Rel. volume
1.1×
Normal
Vs peers
—
No comparable peers
Market cap
$3.4B
NASDAQ Global Market
Analyst target
$113
+113.2% vs price
Price chart
Sep 15 – Oct 16
EVVVNVEEE$53$68$84Sep 15Sep 23Oct 1Oct 8Oct 16
E earnings
F filing
A analyst
V/N other
click a marker to highlight
Change events — click to jump to details

What it means for ACM Research, Inc. investors

For ACM Research, Inc. investors, the recent signals add up to a bearish shift. On the constructive side: ACM Research rallied +6.06% to $73.63, driven by continued momentum following a strong Q2 earnings beat ($0.61 EPS vs. $0.42 consensus) and raised full-year revenue guidance, per web sources citing accelerating orders and surging advanced technology revenue; ACM Research, Inc. (ACMR) moved +15.45% from $82.52 to $95.27 on 2026-07-21. Weighing against that: Material negative event; Sharp 8.6% decline — elevated risk. Wall Street's consensus price target sits at $113.20, implying +113.2% upside from $53.10. BestStocks rates the overall signal quality medium (60/100). With earnings roughly 19 days out, the next report is the most likely near-term test of the move.

ACMR price reaction

ACMR last traded at $53.10, down $4.99 (-8.59%) from the previous close of $58.09. The session traded on 1.1× average volume (normal), so participation was unremarkable. Over the past month the stock has ranged between $53.10 and $83.58, and it currently sits about 0% of the way up that band.

Bullish and bearish analyst opinions on ACM Research, Inc. (ACMR)

The consensus analyst price target on ACM Research, Inc. (ACMR) is $113.20, 113.2% above the recent $53.10. Here is how the bullish and bearish cases on ACMR line up.

The bullish case

  • Wall Street's consensus price target of $113.20 implies +113.2% upside from $53.10.
  • The Street's most bullish target is $136.00 (+156.1%).
  • ACM Research rallied +6.06% to $73.63, driven by continued momentum following a strong Q2 earnings beat ($0.61 EPS vs. $0.42 consensus) and raised full-year revenue guidance, per web sources citing accelerating orders and surging advanced technology revenue.
  • ACM Research, Inc. (ACMR) moved +15.45% from $82.52 to $95.27 on 2026-07-21.

The bearish case

  • Material negative event.
  • Sharp 8.6% decline — elevated risk.
  • ACM Research, Inc. moved -6.11% intraday from $80.67 to $75.74.
  • ACM Research fell 8.38% to $84.25 in intraday trading despite a broader market uptick, according to Zacks.
  • ACMR fell 11.47% intraday to $102.77, extending a decline that began yesterday when the stock closed down 7.67% at $117.16.
Bull vs bear balanceBearish Shift
BearishNeutralBullish

Weighing both sides, BestStocks' composite read of recent signals is bearish, as the bull-versus-bear meter above shows. This is an educational summary of the bull and bear case, not investment advice.

Analyst price targets and ratings are FMP consensus figures as of Oct 16, 2026; other aggregators may differ. High and low targets show the range of estimates, not forecasts.

Analyst expectations
Consensus target: $113+113.2%
Morgan Stanley maintained Overweight · 2026-06-24
SEC filings watch
8-K2026-09-30
Material event — review for impact
high
8-K2026-08-27
Material event — review for impact
high
10-Q2026-08-07
Quarterly financial results
medium
8-K2026-08-07
Material event — review for impact
high
Peer context
ACMR-8.6%

Previous notable changes for ACMR

Valuation2026-10-05-8.6%via SEC EDGAR ↗
ACM Research fell 6.75% to $77.75 intraday, though the provided evidence does not identify a specific catalyst for today's move. Volume of 617,007 shares is normal for this time of session. A SEC filing and Yahoo Finance coverage are cited as sources by Google's AI Overview, but the linked documents do not detail a concrete event driving the decline.
Valuation2026-10-01+3.3%via defenseworld.net ↗
ACM Research rose 3.62% to $83.85 following a material event filing (8-K) submitted today, per SEC records. The gain occurred on above-average volume (1.99x normal for this time of session), suggesting institutional interest in the disclosed event.
Valuation2026-09-30+7.0%via nz.finance.yahoo.com ↗
ACM Research rose 6.31% to $80.38, driven by upward momentum from recent backlog data releases from its Shanghai subsidiary combined with continued semiconductor and AI-driven demand tailwinds (web_catalyst). Volume of 839,654 shares ran 1.14x normal for this time of session. The move extends recent strength following earlier raised 2026 revenue outlooks and solid Q2 earnings.
News2026-09-30+7.0%
ACM Research management will participate in the 18th Annual CEO Investor Summit 2026.

In-depth ACMR event analyses

Permanent, dated analyses of ACMR's most significant sessions.
Upcoming catalysts & outlook
Next earnings
2026-11-04 (est.)
in 19 days
10-Q Filing (est.)
2026-11-06
Medium impact
Thesis shift
Bearish Shift
bearish signal
Risk level
High
from change events

Frequently asked questions about ACMR

Why did ACM Research, Inc. (ACMR) stock move?

ACMR tumbled 8.6% to $53.10. No single company-specific catalyst was confirmed during the move window, and it looks technical.

How much did ACMR stock fall?

ACMR lost 8.59% ($4.99) versus the prior close of $58.09, last trading at $53.10 on 1.1× average volume.

When is ACM Research, Inc.'s next earnings date?

ACMR's next earnings report is estimated for 2026-11-04 — about 19 days away.

What is the analyst price target for ACMR?

The consensus analyst price target for ACMR is $113.20, about 113.2% above the current $53.10. Over the past 90 days, analysts recorded 0 upgrades, 0 maintains, and 0 downgrades.

How BestStocks tracks ACMR

This page is generated automatically by BestStocks' change-detection system after price move down was detected and verified against independent data sources. It draws on 20 tracked change events for ACMR, cross-checked against the data sources listed below. Price, volume, and market-capitalization figures are the live intraday quote as of October 16, 2026 and refresh as new information is detected; for companies with multiple share classes, market-cap figures can differ by data source. Analyst price targets and ratings are FMP consensus. This is an educational summary of what changed and why — not personalized investment advice.

Data sources
FMP real-time & historical price dataCompany news feedsFMP earnings & estimatesAnalyst ratings & price targets (FMP)SEC EDGAR filingsEarnings calendar (FMP)
Educational research tool — not personalized investment advice. Data may be delayed.