ASX (ASE Technology Holding Co., Ltd.)
Insider Trading Activity
Every open-market purchase and sale reported by ASX officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-19 | Chih-Hsiao Chung | GM, ASE Japan & Wuxi Tongzhi | M | — | — |
| 2026-07-31 | Chung Lin | GM, ASE Shanghai & Electronics | M | — | — |
| 2026-07-24 | Du-Tsuen Uang | Chief Administration Officer | Sell | — | — |
| 2026-07-17 | Du-Tsuen Uang | Chief Administration Officer | Sell | — | — |
| 2026-07-15 | Hung Pen Chang | Director | M | — | — |
| 2026-07-08 | Du-Tsuen Uang | Chief Administration Officer | Sell | — | — |
| 2026-07-02 | Du-Tsuen Uang | Chief Administration Officer | Sell | — | — |
| 2026-06-23 | Du-Tsuen Uang | Chief Administration Officer | Sell | — | — |
| 2026-06-03 | Du-Tsuen Uang | Chief Administration Officer | Sell | — | — |
| 2026-05-27 | Jeffrey Chen | Director | Sell | — | — |
| 2026-05-21 | Jeffrey Chen | Director | Sell | — | — |
| 2026-05-18 | Jeffrey Chen | Director | Sell | — | — |
| 2026-04-28 | Jeffrey Chen | Director | Sell | — | — |
| 2026-04-23 | Jeffrey Chen | Director | Sell | — | — |
| 2026-04-22 | Tien-Szu Chen | GM, ASE Inc. Chung-Li Branch | Sell | — | — |
| 2026-04-20 | Jeffrey Chen | Director | Sell | — | — |
| 2026-04-15 | Jeffrey Chen | Director | Sell | — | — |
| 2026-04-13 | Chien Shen Chang | Director | M | — | — |
| 2026-04-10 | Jeffrey Chen | Director | Sell | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | Director | 271,272,467 | — |
| — | Director | 8,034,746 | — |
| — | Director | 2,403,000 | — |
| — | GM, ASE Inc. Chung-Li Branch | 2,381,821 | — |
| — | Chief Administration Officer | 751,000 | — |
| — | GM, ASE Japan & Wuxi Tongzhi | 322,000 | — |
| — | GM, ASE Shanghai & Electronics | 130,278 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the ASX quote page; the site-wide leaderboard is on the insider transactions hub.