Insider record · § VP
Tien Bor-Zen insider buys
Every disclosed SEC Form 4 open-market purchase by Tien Bor-Zen (VP · TSM), with the stock's move after each filing. Disclosures are public record; returns are informational, not investment advice.
Disclosed buys
2
Total bought
$454K
Avg Δ7d
−4.6%
Win rate · 7d
0%
Avg Δ30d
−7.0%
Last filing
2026-07-23