Tien-Szu Chen - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Tien-Szu Chen is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days. Lifetime open-market sales: $247.14M.
Profile
Tien-Szu Chen holds the role of GM, ASE Inc. Chung-Li Branch at ASE Technology Holding Co., Ltd. (ASX). Chen has reported 1 insider filing with the SEC since 2026. The most recent filing was in April 2026.
| Role | GM, ASE Inc. Chung-Li Branch |
|---|---|
| Notability | 20/100 |
Board memberships
- ASE Technology Holding Co., Ltd.
Reported roles
- GM, ASE Inc. Chung-Li Branch
Trading Pattern
InsiderAlpha's records for Tien-Szu Chen go back to 2026: 1 primary Form 4 filing, an average of 1.0 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Career & Filing History
Every role Tien-Szu Chen has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- GM, ASE Inc. Chung-Li Branch at ASE Technology Holding Co., Ltd. (ASX) - 1 filing, 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-04-22 | ASX | ASE Technology Holding Co., Ltd. | S - Open-market sale | 80.0K | $471.00 | $37.68M |
| 2026-04-22 | ASX | ASE Technology Holding Co., Ltd. | S - Open-market sale | 50.0K | $467.00 | $23.35M |
| 2026-04-22 | ASX | ASE Technology Holding Co., Ltd. | S - Open-market sale | 72.0K | $466.00 | $33.55M |
| 2026-04-22 | ASX | ASE Technology Holding Co., Ltd. | S - Open-market sale | 328.0K | $465.11 | $152.55M |
Most Active Insiders Right Now
Tien-Szu Chen has no recent co-filers at the same companies, so here are the insiders with the largest open-market activity across the market in the last 90 days.
- MetLife Investment Management, LLC - $1600000.00B of FINS open-market activity in the last 90 days
- Magnetar Financial LLC - $16357.48B of CRWV open-market activity in the last 90 days
- Marianne Okland - $18.46B of STNG open-market activity in the last 90 days
- VisionWave Holdings, Inc. - $14.13B of SVRE open-market activity in the last 90 days
- Vanessa Allen Sutherland - $7.44B of PSX open-market activity in the last 90 days
- AI Alpine (Luxembourg) S.a.r.l. - $2.69B of INIO open-market activity in the last 90 days
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Motor Corp/ Toyota
- TPG GP A, LLC
- Chrysler Retirees Medical Benefits Plan Uaw
- Uber Technologies, Inc
- UNIVERSITY OF TEXAS/TEXAS AM INVESTMENT MANAGEMENT CO
- VAN ECK ASSOCIATES CORP
- Weegen Felice Isabel Verduyn-Van
- Viking Cake BR, LLC
Frequently Asked Questions
Who is Tien-Szu Chen?
Tien-Szu Chen holds the role of GM, ASE Inc. Chung-Li Branch at ASE Technology Holding Co., Ltd. (ASX). Chen has reported 1 insider filing with the SEC since 2026. The most recent filing was in April 2026.…
Has Tien-Szu Chen been buying or selling stock?
Recorded transactions: 0 open-market purchases and 4 open-market sales ($247.14M) across all tracked filings.
Where can I see all of Tien-Szu Chen's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live Tien-Szu Chen profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.