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SEC EDGAROCT 81 min read$TSM

Chuang Tzu-Sou purchased $4K of TSM (indirect holdings)

Chuang Tzu-Sou (VP) purchased 46 indirectly-held shares of TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD (TSM) at $79.39 on 2026-10-07.

Original reporting
SEC EDGAR · Chuang Tzu-Sou
Published Oct 8, 2026, 10:12 AM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Oct 8, 2026, 10:36 AM 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 DeskScoring methodologyReport an issue
AlphAI market briefInsider activity
Primary signal
$TSM
Neutral
high confidence
Mentioned
$TSM
Relevance
3/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$TSMNeutralLow
01

Why it matters

The transaction size is negligible; unlikely to move the stock.

02

Market read

Low relevance; the filing provides a factual update with minimal trading implications.

03

What to watch

The purchase is via an indirect holding, possibly masking the true exposure.

Relevance 3/10Novelty 3/10Timing: after-hours filing

Background

SEC Form 4 filing for Taiwan Semiconductor Manufacturing Co (TSM) reporting a minor insider purchase.

Company-level read

Ticker impact

$TSMNeutralHigh confidence
Context

Form 4 shows VP Chuang Tzu‑Sou bought 46 shares at $79.39, a $3.6K purchase.

Expected impact

likely negligible pressure as market prices in the modest buy.

Evidence & confidence

The transaction size is tiny relative to market cap; no material impact expected.

Market effects

Sector

None; the purchase is too small to affect the semiconductor sector.

Regional

Minimal impact on Taiwan or US markets.

Global

Insignificant.

Counterpoint

What could challenge this read

Even small insider buys can signal confidence; some traders may view it as a subtle bullish cue.

Key entities

  • Officer
    Chuang Tzu‑Sou

    Vice President of TSM who purchased shares.

Read at source← All news

Full insider trading history

This story covers one filing. See everything behind it: every insider buy and sell on record, 10b5-1 plans, late filings, and which officers and directors are trading.

TSM insider trading history →

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