Insider Profile · SEC Form 4 Activity · Trailing 90 Days
Lee John Tseng-chung
Over the trailing 90 days, Lee John Tseng-chung (Director at MKS INC) sold $3.2M of stock in MKSI, per 1 SEC Form 4 transaction.
- Role
- Director
- Companies
- MKSI
- Window
- Trailing 90 days · 1 transactions · CIK 1414656
- Net activity
- −$3.2M ($0 bought · $3.2M sold)
By Company (Trailing 90 Days)
| Symbol | Company | Txns | Bought | Sold | Net |
|---|---|---|---|---|---|
| MKSI | MKS INC | 1 | — | $3.2M | −$3.2M |
Transactions (1)
| Date | Symbol | Type | Shares | Value | Description |
|---|---|---|---|---|---|
| 2026-05-22 | MKSI | Sell | 10.0K | $3.2M | Open market or private sale |
Activity shown covers the trailing 90 days of SEC Form 4 filings. "Buy" and "sell" follow the SEC acquired/disposed codes and include compensation events (grants, option exercises, tax withholding) unless noted. Historical fact, not investment advice.
Follow Lee's next move
Real-time Form 4 alerts, insider track records, and cluster detection — matched to your watchlist.