Tien Bor-Zen
Officer · TSM
As of 2026-09-16, Tien Bor-Zen has 33 Form 4 transactions on record across 1 company — 33 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Reconstructed holdings
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-07 | TSM | Purchase | 43 @ $76.20 | $3K | +15.9% of holding | 313 | Form 4 |
| 2026-09-07 | TSM | Purchase | 5 @ $76.20 | $381 | +6.3% of holding | 85 | Form 4 |
| 2026-08-07 | TSM | Purchase | 42 @ $73.31 | $3K | +18.4% of holding | 270 | Form 4 |
| 2026-08-07 | TSM | Purchase | 7 @ $73.31 | $513 | +9.6% of holding | 80 | Form 4 |
| 2026-08-03 | TSM | Purchase | 1,000 @ $73.06 | $73K | +7.7% of holding | 14,051 | Form 4 |
| 2026-07-28 | TSM | Purchase | 1,000 @ $67.97 | $68K | +25.0% of holding | 5,000 | Form 4 |
| 2026-07-28 | TSM | Purchase | 10 @ $390.00 | $4K | +8.5% of holding | 127 | Form 4 |
| 2026-07-28 | TSM | Purchase | 5 @ $390.00 | $2K | +3.9% of holding | 132 | Form 4 |
| 2026-07-21 | TSM | Purchase | 1,000 @ $74.75 | $75K | +33.3% of holding | 4,000 | Form 4 |
| 2026-07-21 | TSM | Purchase | 1,000 @ $74.44 | $74K | +50.0% of holding | 3,000 | Form 4 |
| 2026-07-21 | TSM | Purchase | 1,000 @ $74.13 | $74K | +8.3% of holding | 13,051 | Form 4 |
| 2026-07-21 | TSM | Purchase | 1,000 @ $73.98 | $74K | +100.0% of holding | 2,000 | Form 4 |
| 2026-07-20 | TSM | Purchase | 10 @ $405.00 | $4K | +9.3% of holding | 117 | Form 4 |
| 2026-07-07 | TSM | Purchase | 40 @ $76.62 | $3K | +21.3% of holding | 228 | Form 4 |
| 2026-07-07 | TSM | Purchase | 6 @ $76.62 | $460 | +9.0% of holding | 73 | Form 4 |
| 2026-06-30 | TSM | Purchase | 1,000 @ $75.70 | $76K | ownership Δ n/a | 1,000 | Form 4 |
| 2026-06-29 | TSM | Purchase | 1,000 @ $76.64 | $77K | +9.0% of holding | 12,051 | Form 4 |
| 2026-06-05 | TSM | Purchase | 43 @ $76.01 | $3K | +29.7% of holding | 188 | Form 4 |
| 2026-06-05 | TSM | Purchase | 7 @ $76.01 | $532 | +11.7% of holding | 67 | Form 4 |
| 2026-05-20 | TSM | Purchase | 7 @ $400.00 | $3K | +7.0% of holding | 107 | Form 4 |
| 2026-05-19 | TSM | Purchase | 1,000 @ $69.98 | $70K | +11.0% of holding | 10,051 | Form 4 |
| 2026-05-19 | TSM | Purchase | 1,000 @ $69.83 | $70K | +9.9% of holding | 11,051 | Form 4 |
| 2026-05-19 | TSM | Purchase | 10 @ $391.81 | $4K | +11.1% of holding | 100 | Form 4 |
| 2026-05-08 | TSM | Purchase | 44 @ $71.82 | $3K | +43.6% of holding | 145 | Form 4 |
| 2026-05-08 | TSM | Purchase | 7 @ $71.82 | $503 | +13.2% of holding | 60 | Form 4 |
| 2026-04-28 | TSM | Purchase | 10 @ $386.00 | $4K | +14.3% of holding | 80 | Form 4 |
| 2026-04-28 | TSM | Purchase | 5 @ $390.00 | $2K | +5.9% of holding | 90 | Form 4 |
| 2026-04-28 | TSM | Purchase | 5 @ $390.00 | $2K | +6.3% of holding | 85 | Form 4 |
| 2026-04-09 | TSM | Purchase | 53 @ $57.87 | $3K | +110.4% of holding | 101 | Form 4 |
| 2026-04-09 | TSM | Purchase | 9 @ $57.87 | $521 | +20.5% of holding | 53 | Form 4 |
| 2026-03-22 | TSM | Purchase | 1,000 @ $55.93 | $56K | +12.4% of holding | 9,051 | Form 4 |
2 award / exercise / gift records — not counted as purchases
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.