Transactions
13
Insider / ASE Technology Holding Co., Ltd.
Uang Du-Tsuen
Chief Administration Officer at ASE Technology Holding Co., Ltd.
Uang Du-Tsuen, Chief Administration Officer at ASE Technology Holding Co., Ltd., has disclosed 13 transactions in ASX since June 3, 2026: 0 purchases (0 open-market buys) and 12 sales, worth about $26.6M at the reported prices. The latest was filed October 14, 2026, 2 days after the trade; 1 filing was late against the 2-business-day Form 4 deadline.
Open-market buys
0
Sales
12
Avg. disclosure lag
1.8d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months Uang Du-Tsuen made no purchases and 12 sales worth $27M, plus 1 other transaction. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
Uang Du-Tsuen has traded 1 stock on record; the largest by dollars is ASX.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
1 of 8 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| S | Open-market sale | 12 | 40,000 | $26.6M |
| A | Grant or award | 1 | 90,000 | — |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 13 | 0 | 12 · $26.6M |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| ASX | Sell S | October 12, 2026 | October 14, 2026 | 2d | 3,000 | $752 | $2.3M | Form 4 ↗ | ||
| ASX | Other A | September 7, 2026 | September 9, 2026 | 2d | 90,000 | — | — | Form 4 ↗ | ||
| ASX | Sell S | July 22, 2026 | July 24, 2026 | 2d | 3,000 | $665 | $2.0M | Form 4 ↗ | ||
| ASX | Sell S | July 15, 2026 | July 17, 2026 | 2d | 3,000 | $688 | $2.1M | Form 4 ↗ | ||
| ASX | Sell S | July 6, 2026 | July 8, 2026 | 2d | 2,000 | $687 | $1.4M | Form 4 ↗ | ||
| ASX | Sell S | July 1, 2026 | July 2, 2026 | 1d | 3,000 | $709 | $2.1M | Form 4 ↗ | ||
| ASX | Sell S | June 30, 2026 | July 2, 2026 | 2d | 2,000 | $687 | $1.4M | Form 4 ↗ | ||
| ASX | Sell S | June 30, 2026 | July 2, 2026 | 2d | 3,000 | $664 | $2.0M | Form 4 ↗ | ||
| ASX | Sell S | June 23, 2026 | June 23, 2026 | 0d | 3,000 | $697 | $2.1M | Form 4 ↗ | ||
| ASX | Sell S | June 22, 2026 | June 23, 2026 | 1d | 5,000 | $667 | $3.3M | Form 4 ↗ | ||
| ASX | Sell S | June 18, 2026 | June 23, 2026 | 5d | 3,000 | $611 | $1.8M | late | Form 4 ↗ | |
| ASX | Sell S | June 3, 2026 | June 3, 2026 | 0d | 5,000 | $617 | $3.1M | Form 4 ↗ | ||
| ASX | Sell S | June 1, 2026 | June 3, 2026 | 2d | 5,000 | $607 | $3.0M | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| October 14, 2026 | Form 4 | 0000950103-26-015546 | 1 | published | EDGAR ↗ |
| September 9, 2026 | Form 4 | 0000950103-26-013688 | 1 | published | EDGAR ↗ |
| July 24, 2026 | Form 4 | 0000950103-26-011125 | 1 | published | EDGAR ↗ |
| July 17, 2026 | Form 4 | 0000950103-26-010761 | 1 | published | EDGAR ↗ |
| July 8, 2026 | Form 4 | 0000950103-26-010378 | 1 | published | EDGAR ↗ |
| July 2, 2026 | Form 4 | 0000950103-26-010022 | 3 | published | EDGAR ↗ |
| June 23, 2026 | Form 4 | 0000950103-26-009314 | 3 | published | EDGAR ↗ |
| June 3, 2026 | Form 4 | 0000950103-26-008428 | 2 | published | EDGAR ↗ |
Other insiders at ASE Technology Holding Co., Ltd.
- Chen Jeffrey Director 26 rows
- Chang Hung Pen Director 6 rows
- Chen Tien-Szu GM, ASE Inc. Chung-Li Branch 5 rows
- Chung Chih-Hsiao GM, ASE Japan & Wuxi Tongzhi 5 rows
- Lin Chung GM, ASE Shanghai & Electronics 5 rows
- Chang Chien Shen Director 4 rows
- Hsiang Kenneth CEO, ISE Labs 1 row
- Kuo Hung-Ming Principal Accounting Officer 1 row
- Lo Raymond GM TW & Kaohsiung Pkg Facility 1 row
- Tang Andrew R Director 1 row
Everyone on file, with contracts and lobbying under the company's name: ASE Technology Holding Co., Ltd..
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.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- 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 |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 8 | 13 | June 3, 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.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.