Tien Bor-Zen
VP
Tien Bor-Zen has filed 15 SEC Form 4 filings (33 transaction rows) across 1 company, with disclosures dating back to 2026. 15 of those filings fall inside the rolling window. Most recent filing: Oct 8, 2026.
On the most recent filing, Tien Bor-Zen is listed as VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD. Inside the rolling window, Tien Bor-Zen reported 17 open-market purchases totaling $834K in TSM and no open-market sales. The largest disclosed transaction in the window is a purchase of 4,000 TSM shares on Jul 21, 2026, worth $297K.
Companies traded
Other insiders at TSM
Insider Buying
$834K
reported purchases (SEC code P)
Insider Selling
$0
reported sales (SEC code S)
Companies
1
in the rolling window
| Source | |||||||
|---|---|---|---|---|---|---|---|
| TSM | VP | Purchase | 47 | $4K | Oct 8 | SEC ↗ | |
| TSM | VP | Purchase | 48 | $4K | Sep 9 | SEC ↗ | |
| TSM | VP | Purchase | 49 | $4K | Aug 10 | SEC ↗ | |
| TSM | VP | Purchase | 1,000 | $73K | Aug 4 | SEC ↗ | |
| TSM | VP | Purchase | 1,015 | $74K | Jul 30 | SEC ↗ | |
| TSM | VP | Purchase | 4,000 | $297K | Jul 23 | SEC ↗ | |
| TSM | VP | Purchase | 10 | $4K | Jul 23 | SEC ↗ | |
| TSM | VP | Purchase | 46 | $4K | Jul 9 | SEC ↗ | |
| TSM | VP | Purchase | 1,000 | $77K | Jun 30 | SEC ↗ | |
| TSM | VP | Purchase | 1,000 | $76K | Jun 30 | SEC ↗ | |
| TSM | VP | Purchase | 50 | $4K | Jun 9 | SEC ↗ | |
| TSM | VP | Purchase | 2,010 | $144K | May 21 | SEC ↗ | |
| TSM | VP | Purchase | 7 | $3K | May 21 | SEC ↗ | |
| TSM | VP | Purchase | 51 | $4K | May 11 | SEC ↗ | |
| TSM | VP | Purchase | 15 | $6K | Apr 29 | SEC ↗ | |
| TSM | VP | Purchase | 62 | $4K | Apr 13 | SEC ↗ | |
| TSM | VP | Purchase | 1,000 | $56K | Mar 24 | SEC ↗ |
Frequently asked questions
How many SEC Form 4 filings has Tien Bor-Zen made?
Tien Bor-Zen has filed 15 SEC Form 4 filings (33 transaction rows) across 1 company since 2026.
Which companies does Tien Bor-Zen trade?
Tien Bor-Zen has filed SEC Form 4 disclosures for 1 company, including TSM.
When was Tien Bor-Zen's most recent SEC Form 4 filing?
Tien Bor-Zen's most recent SEC Form 4 filing on Tracefour is dated Oct 8, 2026.
What is Tien Bor-Zen's job title?
On the most recent SEC Form 4 filings tracked by Tracefour, Tien Bor-Zen is listed as VP.
What is Tien Bor-Zen's total buy and sell value in the current window?
Inside the rolling retention window, Tien Bor-Zen bought $834K and sold $0 based on SEC Form 4 filings.
What was Tien Bor-Zen's largest disclosed transaction?
The largest disclosed transaction in the current window is a purchase of 4,000 TSM shares on 2026-07-21, worth $297K, per SEC Form 4 filings.