Tien Bor-Zen
Executive buyerVP · TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD
Every open-market stock purchase Tien Bor-Zen has reported to the SEC on Form 4 that met our signal bar, parsed straight from the filings. This page tracks where those buys landed inside insider clusters and how the prices paid compare to where the stock trades now.
Where the buys stand today
- TSMTAIWAN SEMICONDUCTOR MANUFACTURING CO LTD
17 purchases totalling $462.7K at an average of $74.45 per share. See all insider buying in TSM →
Avg price paid$74.45Latest price—Market capUnknown
Cluster participation
Qualifying buys grouped with other insiders buying the same stock — the pattern this site exists to catch.
- TSMAug 7 – Nov 1, 202630 insiders$607.7K
- TSMJul 13 – Oct 7, 202630 insiders$1.3M
- TSMJul 13 – Oct 7, 202630 insiders$1.3M
- TSMJul 13 – Oct 7, 202630 insiders$1.4M
- TSMJul 13 – Oct 7, 202630 insiders$1.3M
- TSMJul 13 – Oct 7, 202630 insiders$1.3M
- TSMJul 13 – Oct 7, 202630 insiders$1.3M
- TSMJul 2 – Sep 7, 202631 insiders$1.4M
- TSMJul 2 – Sep 7, 202631 insiders$1.5M
- TSMJul 2 – Aug 19, 202631 insiders$1.4M
- TSMJul 7 – Aug 19, 202631 insiders$1.2M
- TSMJul 7 – Aug 7, 202631 insiders$1.1M
- TSMJul 7 – Aug 7, 202631 insiders$975.0K
- TSMJul 7 – Aug 7, 202631 insiders$978.4K
- TSMJul 7 – Aug 7, 202631 insiders$991.1K
- TSMJul 7 – Aug 7, 202631 insiders$1.0M
- TSMJul 7 – Aug 3, 202631 insiders$936.7K
- TSMJul 7 – Jul 28, 202631 insiders$863.6K
- TSMJul 7 – Jul 21, 202631 insiders$789.8K
- TSMJul 7 – Jul 21, 202631 insiders$488.5K
- TSMJul 7 – Jul 19, 202631 insiders$341.7K
- TSMJul 7 – Jul 13, 202631 insiders$126.3K
- TSMJul 7 – Jul 7, 202631 insiders$122.6K
All reported buys
| Date | Ticker | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Oct 7, 2026 | TSMcluster | 40 | $79.39 | $3.2K | SEC ↗ |
| Oct 7, 2026 | TSMcluster | 7 | $79.39 | $555.7 | SEC ↗ |
| Sep 7, 2026 | TSMcluster | 5 | $76.20 | $381.0 | SEC ↗ |
| Sep 7, 2026 | TSMcluster | 43 | $76.20 | $3.3K | SEC ↗ |
| Aug 7, 2026 | TSMcluster | 42 | $73.31 | $3.1K | SEC ↗ |
| Aug 7, 2026 | TSMcluster | 7 | $73.31 | $513.2 | SEC ↗ |
| Aug 3, 2026 | TSMcluster | 1,000 | $73.06 | $73.1K | SEC ↗ |
| Jul 28, 2026 | TSMcluster | 5 | $390.00 | $2.0K | SEC ↗ |
| Jul 28, 2026 | TSMcluster | 10 | $390.00 | $3.9K | SEC ↗ |
| Jul 28, 2026 | TSMcluster | 1,000 | $67.97 | $68.0K | SEC ↗ |
| Jul 21, 2026 | TSMcluster | 1,000 | $73.98 | $74.0K | SEC ↗ |
| Jul 21, 2026 | TSMcluster | 1,000 | $74.75 | $74.8K | SEC ↗ |
| Jul 21, 2026 | TSMcluster | 1,000 | $74.44 | $74.4K | SEC ↗ |
| Jul 21, 2026 | TSMcluster | 1,000 | $74.13 | $74.1K | SEC ↗ |
| Jul 20, 2026 | TSMcluster | 10 | $405.00 | $4.1K | SEC ↗ |
| Jul 7, 2026 | TSMcluster | 6 | $76.62 | $459.7 | SEC ↗ |
| Jul 7, 2026 | TSMcluster | 40 | $76.62 | $3.1K | SEC ↗ |
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About this data
Figures are parsed from Tien Bor-Zen's Form 4 filings on SEC EDGAR (CIK 2114023) and cover open-market purchases (transaction code P) — grants, option exercises, and sales are excluded, which is why totals here can differ from raw filing counts. Every row links to its source document.
This page is informational and reflects public filing data. It is not investment advice.