Company / CIK 0001122411
ASE Technology Holding Co., Ltd.
- Ticker
- ASX
- Insiders on file
- 14
- Members of Congress who traded it
- 1
- Federal contracts on record
- none matched
- Lobbying filings on record
- none matched
- SEC filings
- EDGAR ↗
- Latest trade on record
- October 12, 2026
ASE Technology Holding Co., Ltd. (ASX) has 14 insiders on file who disclosed 71 transactions in the last 12 months (0 open-market buys, 39 sales, about $960.4M at reported prices), and 1 congressional trade in its stock is on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name; no lobbying filing names it as client this year.
ASE Technology Holding Co., Ltd. in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
3 people account for the disclosed buying and selling in ASE Technology Holding Co., Ltd. over the last 12 months; the most active is Chen Tien-Szu with $247M.
Insiders
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| Uang Du-Tsuen | Chief Administration Officer | 13 | 0 | 12 | October 14, 2026 |
| Chang Hung Pen | Director | 6 | 0 | 0 | September 24, 2026 |
| Chen Jeffrey | Director | 26 | 0 | 23 | September 9, 2026 |
| Chen Tien-Szu | GM, ASE Inc. Chung-Li Branch | 5 | 0 | 4 | September 9, 2026 |
| Lin Chung | GM, ASE Shanghai & Electronics | 5 | 0 | 0 | September 9, 2026 |
| Chung Chih-Hsiao | GM, ASE Japan & Wuxi Tongzhi | 5 | 0 | 0 | September 9, 2026 |
| Wu Tien-Yue | Director | 1 | 0 | 0 | September 9, 2026 |
| Tang Andrew R | Director | 1 | 0 | 0 | September 9, 2026 |
| Tung Hung-Szu | Chief Financial Officer | 1 | 0 | 0 | September 9, 2026 |
| Kuo Hung-Ming | Principal Accounting Officer | 1 | 0 | 0 | September 9, 2026 |
| Lo Raymond | GM TW & Kaohsiung Pkg Facility | 1 | 0 | 0 | September 9, 2026 |
| Hsiang Kenneth | CEO, ISE Labs | 1 | 0 | 0 | September 9, 2026 |
| Tsai Chi-Wen | Chairman & President, SPIL | 1 | 0 | 0 | September 9, 2026 |
| Chang Chien Shen | Director | 4 | 0 | 0 | April 13, 2026 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded ASX
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the ASX page.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| Sheri Biggs | Representative (SC, District 3), Republican | 1 | 0 | 1 | $1,001–$15K | March 18, 2025 |
Insider transactions
| Filer | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Uang Du-Tsuen | ASX | Sell S | October 12, 2026 | October 14, 2026 | 2d | 3,000 | $752 | $2.3M | Form 4 ↗ | ||
| Chang Hung Pen | ASX | Option / conversion M | September 22, 2026 | September 24, 2026 | 2d | 300,000 | — | — | derivative | Form 4 ↗ | |
| Chang Hung Pen | ASX | Option / conversion M | September 22, 2026 | September 24, 2026 | 2d | 300,000 | $99 | $29.6M | Form 4 ↗ | ||
| Tsai Chi-Wen | ASX | Other A | September 7, 2026 | September 9, 2026 | 2d | 334,000 | — | — | Form 4 ↗ | ||
| Chung Chih-Hsiao | ASX | Other A | September 7, 2026 | September 9, 2026 | 2d | 30,000 | — | — | Form 4 ↗ | ||
| Hsiang Kenneth | ASX | Other A | September 7, 2026 | September 9, 2026 | 2d | 40,000 | — | — | Form 4 ↗ | ||
| Lin Chung | ASX | Other A | September 7, 2026 | September 9, 2026 | 2d | 30,000 | — | — | Form 4 ↗ | ||
| Lo Raymond | ASX | Other A | September 7, 2026 | September 9, 2026 | 2d | 400,000 | — | — | Form 4 ↗ | ||
| Kuo Hung-Ming | ASX | Other A | September 7, 2026 | September 9, 2026 | 2d | 50,000 | — | — | Form 4 ↗ | ||
| Uang Du-Tsuen | ASX | Other A | September 7, 2026 | September 9, 2026 | 2d | 90,000 | — | — | Form 4 ↗ | ||
| Tung Hung-Szu | ASX | Other A | September 7, 2026 | September 9, 2026 | 2d | 400,000 | — | — | Form 4 ↗ | ||
| Tang Andrew R | ASX | Other A | September 7, 2026 | September 9, 2026 | 2d | 85,000 | — | — | Form 4 ↗ | ||
| Chen Tien-Szu | ASX | Other A | September 7, 2026 | September 9, 2026 | 2d | 300,000 | — | — | Form 4 ↗ | ||
| Wu Tien-Yue | ASX | Other A | September 7, 2026 | September 9, 2026 | 2d | 600,000 | — | — | Form 4 ↗ | ||
| Chen Jeffrey | ASX | Other G | September 7, 2026 | September 9, 2026 | 2d | 600,000 | — | — | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Other G | September 7, 2026 | September 9, 2026 | 2d | 600,000 | — | — | Form 4 ↗ | ||
| Chen Jeffrey | ASX | Other A | September 7, 2026 | September 9, 2026 | 2d | 300,000 | — | — | Form 4 ↗ | ||
| Chung Chih-Hsiao | ASX | Option / conversion M | August 13, 2026 | August 19, 2026 | 6d | 73,000 | — | — | latederivative | Form 4 ↗ | |
| Chung Chih-Hsiao | ASX | Option / conversion M | August 12, 2026 | August 19, 2026 | 7d | 292,000 | — | — | latederivative | Form 4 ↗ | |
| Chung Chih-Hsiao | ASX | Option / conversion M | August 13, 2026 | August 19, 2026 | 6d | 73,000 | $41 | $3.0M | late | Form 4 ↗ | |
| Chung Chih-Hsiao | ASX | Option / conversion M | August 12, 2026 | August 19, 2026 | 7d | 292,000 | $41 | $12.0M | late | Form 4 ↗ | |
| Lin Chung | ASX | Option / conversion M | July 29, 2026 | July 31, 2026 | 2d | 10,000 | — | — | derivative | Form 4 ↗ | |
| Lin Chung | ASX | Option / conversion M | July 29, 2026 | July 31, 2026 | 2d | 25,000 | — | — | derivative | Form 4 ↗ | |
| Lin Chung | ASX | Option / conversion M | July 29, 2026 | July 31, 2026 | 2d | 10,000 | $99 | $986K | Form 4 ↗ | ||
| Lin Chung | ASX | Option / conversion M | July 29, 2026 | July 31, 2026 | 2d | 25,000 | $41 | $1.0M | Form 4 ↗ | ||
| Uang Du-Tsuen | ASX | Sell S | July 22, 2026 | July 24, 2026 | 2d | 3,000 | $665 | $2.0M | Form 4 ↗ | ||
| Uang Du-Tsuen | ASX | Sell S | July 15, 2026 | July 17, 2026 | 2d | 3,000 | $688 | $2.1M | Form 4 ↗ | ||
| Chang Hung Pen | ASX | Option / conversion M | July 13, 2026 | July 15, 2026 | 2d | 1,500,000 | — | — | derivative | Form 4 ↗ | |
| Chang Hung Pen | ASX | Option / conversion M | July 13, 2026 | July 15, 2026 | 2d | 3,000,000 | — | — | derivative | Form 4 ↗ | |
| Chang Hung Pen | ASX | Option / conversion M | July 13, 2026 | July 15, 2026 | 2d | 1,500,000 | $99 | $147.9M | Form 4 ↗ | ||
| Chang Hung Pen | ASX | Option / conversion M | July 13, 2026 | July 15, 2026 | 2d | 3,000,000 | $41 | $123.3M | Form 4 ↗ | ||
| Uang Du-Tsuen | ASX | Sell S | July 6, 2026 | July 8, 2026 | 2d | 2,000 | $687 | $1.4M | Form 4 ↗ | ||
| Uang Du-Tsuen | ASX | Sell S | July 1, 2026 | July 2, 2026 | 1d | 3,000 | $709 | $2.1M | Form 4 ↗ | ||
| Uang Du-Tsuen | ASX | Sell S | June 30, 2026 | July 2, 2026 | 2d | 2,000 | $687 | $1.4M | Form 4 ↗ | ||
| Uang Du-Tsuen | ASX | Sell S | June 30, 2026 | July 2, 2026 | 2d | 3,000 | $664 | $2.0M | Form 4 ↗ | ||
| Uang Du-Tsuen | ASX | Sell S | June 23, 2026 | June 23, 2026 | 0d | 3,000 | $697 | $2.1M | Form 4 ↗ | ||
| Uang Du-Tsuen | ASX | Sell S | June 22, 2026 | June 23, 2026 | 1d | 5,000 | $667 | $3.3M | Form 4 ↗ | ||
| Uang Du-Tsuen | ASX | Sell S | June 18, 2026 | June 23, 2026 | 5d | 3,000 | $611 | $1.8M | late | Form 4 ↗ | |
| Uang Du-Tsuen | ASX | Sell S | June 3, 2026 | June 3, 2026 | 0d | 5,000 | $617 | $3.1M | Form 4 ↗ | ||
| Uang Du-Tsuen | ASX | Sell S | June 1, 2026 | June 3, 2026 | 2d | 5,000 | $607 | $3.0M | Form 4 ↗ | ||
| Chen Jeffrey | ASX | Sell S | May 27, 2026 | May 27, 2026 | 0d | 2,000 | $653 | $1.3M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | May 26, 2026 | May 27, 2026 | 1d | 9,000 | $630 | $5.7M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | May 25, 2026 | May 27, 2026 | 2d | 9,000 | $590 | $5.3M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | May 22, 2026 | May 27, 2026 | 5d | 9,000 | $538 | $4.8M | lateindirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | May 21, 2026 | May 21, 2026 | 0d | 9,000 | $505 | $4.5M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | May 20, 2026 | May 21, 2026 | 1d | 9,000 | $477 | $4.3M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | May 19, 2026 | May 21, 2026 | 2d | 9,000 | $483 | $4.3M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | May 18, 2026 | May 18, 2026 | 0d | 9,000 | $506 | $4.6M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | May 15, 2026 | May 18, 2026 | 3d | 9,000 | $563 | $5.1M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | May 14, 2026 | May 18, 2026 | 4d | 9,000 | $560 | $5.0M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | April 24, 2026 | April 28, 2026 | 4d | 9,000 | $473 | $4.3M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | April 23, 2026 | April 23, 2026 | 0d | 9,000 | $488 | $4.4M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | April 22, 2026 | April 23, 2026 | 1d | 9,000 | $467 | $4.2M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | April 21, 2026 | April 23, 2026 | 2d | 9,000 | $464 | $4.2M | indirect | Form 4 ↗ | |
| Chen Tien-Szu | ASX | Sell S | April 20, 2026 | April 22, 2026 | 2d | 80,000 | $471 | $37.7M | Form 4 ↗ | ||
| Chen Tien-Szu | ASX | Sell S | April 20, 2026 | April 22, 2026 | 2d | 50,000 | $467 | $23.4M | Form 4 ↗ | ||
| Chen Tien-Szu | ASX | Sell S | April 20, 2026 | April 22, 2026 | 2d | 72,000 | $466 | $33.6M | Form 4 ↗ | ||
| Chen Tien-Szu | ASX | Sell S | April 20, 2026 | April 22, 2026 | 2d | 328,000 | $465 | $152.6M | Form 4 ↗ | ||
| Chen Jeffrey | ASX | Sell S | April 20, 2026 | April 20, 2026 | 0d | 9,000 | $462 | $4.2M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | April 17, 2026 | April 20, 2026 | 3d | 9,000 | $454 | $4.1M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | April 16, 2026 | April 20, 2026 | 4d | 9,000 | $446 | $4.0M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | April 15, 2026 | April 15, 2026 | 0d | 9,000 | $432 | $3.9M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | April 14, 2026 | April 15, 2026 | 1d | 9,000 | $427 | $3.8M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | April 13, 2026 | April 15, 2026 | 2d | 9,000 | $408 | $3.7M | indirect | Form 4 ↗ | |
| Chang Chien Shen | ASX | Option / conversion M | April 9, 2026 | April 13, 2026 | 4d | 1,500,000 | — | — | derivative | Form 4 ↗ | |
| Chang Chien Shen | ASX | Option / conversion M | April 9, 2026 | April 13, 2026 | 4d | 3,000,000 | — | — | derivative | Form 4 ↗ | |
| Chang Chien Shen | ASX | Option / conversion M | April 9, 2026 | April 13, 2026 | 4d | 1,500,000 | $100 | $149.6M | Form 4 ↗ | ||
| Chang Chien Shen | ASX | Option / conversion M | April 9, 2026 | April 13, 2026 | 4d | 3,000,000 | $41 | $123.3M | Form 4 ↗ | ||
| Chen Jeffrey | ASX | Sell S | April 10, 2026 | April 10, 2026 | 0d | 9,000 | $387 | $3.5M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | April 9, 2026 | April 10, 2026 | 1d | 9,000 | $388 | $3.5M | indirect | Form 4 ↗ | |
| Chen Jeffrey | ASX | Sell S | April 8, 2026 | April 10, 2026 | 2d | 9,000 | $381 | $3.4M | indirect | Form 4 ↗ |
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "ASE Technology Holding Co., Ltd.". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
No LDA filing posted since October 2025 names "ASE Technology Holding Co., Ltd." as the client. Filings under a subsidiary or trade-association name are not matched — search lobbying.
Related companies
Companies whose stock was traded by the same people who traded ASX, by number of filers in common. It shows overlap in public filings and nothing else.
- CHEVRON CORP CVX 1 filer in common
- CINCINNATI FINANCIAL CORP CINF 1 filer in common
- JOHNSON & JOHNSON JNJ 1 filer in common
- TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD TSM 1 filer in common
- SCHWAB CHARLES CORP SCHW 1 filer in common
- Apple Inc. AAPL 1 filer in common
- PROGRESSIVE CORP/OH/ PGR 1 filer in common
- MICROSOFT CORP MSFT 1 filer in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 1 | 1 | October 5, 2025 | October 5, 2025 | House Clerk search |
| SEC EDGAR, Form 4 | 33 | 71 | April 10, 2026 | October 14, 2026 | Form 4 list on EDGAR |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.