InsiderSource
ASX

ASE Technology Holding Co., Ltd.

SEC CIK 1122411
$37.80 +99.1% · 90 days
90-day buys
$0
0 open-market
90-day sells
$349.31M
29 open-market
Net insider flow
−$349.31M
Net selling
Filings shown
31
Most recent
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At a glance

Over the last 90 days, insiders at ASX have sold a net $349.31M of stock (0 open-market buys vs 29 sells).

Largest recent trade: Chen Tien-szu sold $152.55M of ASX, trimming their stake 12%.

Most active filer: Chen Jeffrey, with 23 transactions among the recent filings shown.

Insider transaction history

Form 4 filings for ASX, newest first
View on SEC EDGAR ↗
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ASX
ASE Technology Holding Co., Ltd.
Sell Chen Tien-Szu · GM, ASE Inc. Chung-Li Branch · Open-market sale · filed Apr 22, 2026 ΔOwn −12%

Chen Tien-szu sold $152.55M of ASX, trimming their stake 12%.

−$152.55M
328,000 sh @ $465
ASX
ASE Technology Holding Co., Ltd.
Sell Chen Tien-Szu · GM, ASE Inc. Chung-Li Branch · Open-market sale · filed Apr 22, 2026 ΔOwn −2.9%

Chen Tien-szu sold $33.55M of ASX, trimming their stake 3%.

−$33.55M
72,000 sh @ $466
ASX
ASE Technology Holding Co., Ltd.
Sell Chen Tien-Szu · GM, ASE Inc. Chung-Li Branch · Open-market sale · filed Apr 22, 2026 ΔOwn −2.1%

Chen Tien-szu sold $23.35M of ASX, trimming their stake 2%.

−$23.35M
50,000 sh @ $467
ASX
ASE Technology Holding Co., Ltd.
Sell Chen Tien-Szu · GM, ASE Inc. Chung-Li Branch · Open-market sale · filed Apr 22, 2026 ΔOwn −3.4%

Chen Tien-szu sold $37.68M of ASX, trimming their stake 3%.

−$37.68M
80,000 sh @ $471
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About ASX insider activity

This page tracks every recent Form 4 filed for ASE Technology Holding Co., Ltd. with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.

The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.

Frequently asked questions

How often is ASX insider data updated?

Continuously. We read from SEC EDGAR, so new Form 4 filings for ASE Technology Holding Co., Ltd. usually appear here within minutes of being accepted by the SEC.

What does "net insider flow" mean?

It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.

Why do some rows show grants or option exercises instead of buys?

Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.

Is this investment advice?

No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.