SEC EDGARAUG 201 min read$ACMR

Dun Haiping sold $406K of ACMR

Dun Haiping sold 5,000 shares of ACM Research, Inc. (ACMR) at an average of $81.13 ($80.29–$82.17, $0.41M total) across 3 trades on 2026-08-18 under a Rule 10b5-1 trading plan.

Original reporting

SEC EDGAR · Dun Haiping

Published Aug 20, 2026, 8:30 PM UTC

Analysis

AlphAI AI DeskAI-generated

Added to AlphAI Aug 20, 2026, 8:52 PM UTC. Informational, not investment advice.

How this was made

AlphAI summarizes source reporting and applies a structured AI analysis for relevance, timing, sentiment and ticker impact. Always verify material claims with the original publisher.

About AlphAI AI Desk Scoring methodology Report an issue

AlphAI market briefInsider activity

Primary signal

$ACMR

Neutral

medium confidence

Mentioned

$ACMR

Relevance

3/10

AlphAI data visualization · based on SEC EDGAR

Decision brief

The 30-second read

$ACMRNeutralLow

Why it matters

Provides fresh data on insider holdings for ACM Research.

Market read

Small insider sale with limited market impact.

What to watch

Potential upcoming corporate actions not disclosed.

Relevance 3/10Novelty 4/10Timing: filed today

Background

Form 4 filing discloses insider transactions required by SEC.

Company-level read

Ticker impact

AI estimates · verify against primary disclosures

$ACMRNeutralMedium confidence

Context

Director Dun Haiping sold all 5,000 shares for $405,670 via a 10b5-1 plan, leaving zero holdings.

Expected impact

Potential short-term downward pressure, likely limited impact.

Evidence & confidence

Sale amount is small and pre-arranged, reducing informational value.

Market effects

Sector

Minimal effect on semiconductor equipment sector.

Regional

No notable regional impact.

Global

Limited relevance to global markets.

Counterpoint

What could challenge this read

Sale could be purely liquidity-driven, not a bearish signal.

Key entities

Director
Dun Haiping
Insider who sold all shares.
Company
ACM Research, Inc.
Issuer of the shares sold.

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