SEC Form 4 · Updated Daily
SIMO
— SILICON MOTION TECHNOLOGY CORPORATION OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| KOU WALLACE CHIACHANG | Director · Officer | 486,214 | 2026-03-18 | — |
| CHOW PONGCHI JAMES | Director | 415,916.5 | 2026-03-18 | — |
| LIU LIEN CHUN | Director | 73,870 | 2026-03-18 | — |
| TSAI PO HUNG | Officer | 46,350 | 2026-03-18 | — |
| CHEN SHIANG FENG | Director | 27,800 | 2026-03-18 | — |
| LIN YUEH-HUA | Officer | 23,700 | 2026-03-18 | — |
| DUANN SHII TYNG | Director | 15,200 | 2026-05-06 | S |
| LIN KUAN-MING | Director | 9,500 | 2026-06-17 | S |
| SHIEH HAN-PING | Director | 7,655.87 | 2026-06-02 | S |
| Chung Tsung-Ming | Director | 7,500 | 2026-03-18 | — |
| CHENG TAO | Officer | 6,000 | 2026-03-18 | — |
| Lin Tsungtan Cain | Director | 5,000 | 2026-03-18 | — |
| JU SHANG-TZU | Officer | 2,500 | 2026-03-18 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-06-18 | LIN KUAN-MING | Open-market sale | 1,000 | $320.31 | 7,500 |
| 2026-06-18 | SHIEH HAN-PING | Open-market sale | 1,000 | $328.00 | 6,655.87 |
| 2026-06-17 | LIN KUAN-MING | Open-market sale | 1,000 | $310.01 | 8,500 |
| 2026-06-17 | LIN KUAN-MING | Open-market sale | 1,000 | $300.00 | 9,500 |
| 2026-06-02 | SHIEH HAN-PING | Open-market sale | 1,000 | $301.25 | 7,655.87 |
| 2026-05-06 | DUANN SHII TYNG | Open-market sale | 1,500 | $245.00 | 15,200 |
| 2026-03-18 | CHOW PONGCHI JAMES | — | — | — | 415,916.5 |
| 2026-03-18 | CHEN SHIANG FENG | — | — | — | 27,800 |
| 2026-03-18 | DUANN SHII TYNG | — | — | — | 16,700 |
| 2026-03-18 | Chung Tsung-Ming | — | — | — | 7,500 |
| 2026-03-18 | LIN KUAN-MING | — | — | — | 10,500 |
| 2026-03-18 | LIU LIEN CHUN | — | — | — | 73,870 |
| 2026-03-18 | SHIEH HAN-PING | — | — | — | 8,655.87 |
| 2026-03-18 | JU SHANG-TZU | — | — | — | 2,500 |
| 2026-03-18 | Lin Tsungtan Cain | — | — | — | 5,000 |
| 2026-03-18 | KOU WALLACE CHIACHANG | — | — | — | 486,214 |
| 2026-03-18 | TSAI PO HUNG | — | — | — | 46,350 |
| 2026-03-18 | TSAI PO HUNG | — | — | — | 1,900 |
| 2026-03-18 | LIN YUEH-HUA | — | — | — | 23,700 |
| 2026-03-18 | CHENG TAO | — | — | — | 6,000 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.