Tien Bor-Zen: insider buys
Every open-market stock purchase reported by Tien Bor-Zen to the SEC on Form 4.
Total bought$796.31K
Purchases6
Companies1
Last purchase filedAug 4, 2026
Tien Bor-Zen has made 6 open-market purchases worth $796.31K in 1 company since Mar 24, 2026, according to SEC Form 4 filings. The most recent was filed on Aug 4, 2026: 1,000 shares of TSM at $73.06 (VP), worth $73.06K. The largest was $301.35K of TSM on Jul 20, 2026.
Companies Tien Bor-Zen bought
| Ticker | Company | Role | Buys | Total | Since buy | Last filed |
|---|---|---|---|---|---|---|
| TSM | Taiwan Semiconductor Manufacturing Co L… | VP | 6 | $796.31K | — | Aug 4 |
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| Filed | Stock | Insider | Value | Shares | Price | Since buy | Stake | Trade | |
|---|---|---|---|---|---|---|---|---|---|
| Aug 4 | TSMTaiwan Semiconductor Manufact… | Tien Bor-ZenVP | $73.06K | 1,000 | $73.06 | — | +8% | Aug 3 | SEC |
| Jul 30 | TSMTaiwan Semiconductor Manufact… | Tien Bor-ZenVP | $73.82K | 1,015 | $72.73 | — | +26% | Jul 28 | SEC |
| Jul 23 | TSMTaiwan Semiconductor Manufact… | Tien Bor-ZenVP | $301.35K | 4,010 | $75.15 | — | — | Jul 20 | SEC |
| Jun 30 | TSMTaiwan Semiconductor Manufact… | Tien Bor-ZenVP | $152.34K | 2,000 | $76.17 | — | +20% | Jun 29 | SEC |
| May 19 | TSMTaiwan Semiconductor Manufact… | Tien Bor-ZenVP | $139.81K | 2,000 | $69.91 | — | +25% | May 19 | SEC |
| Mar 24 | TSMTaiwan Semiconductor Manufact… | Tien Bor-ZenVP | $55.93K | 1,000 | $55.93 | — | +12% | Mar 22 | SEC |