Silicon Motion (SIMO) insider trading
13 directors and officers declare holding shares of Silicon Motion (SIMO), each in their own filing with the SEC. The largest is Wallace Chiachang Kou (President and CEO · Director) with 486,214 shares, 1.4% of the company, worth $128.3M at the last close. The most recent move on file: Kuan-Ming Lin sold 3,000 shares at $300.00 on Jun 17, 2026. Of the 3 with a trade on file, 0 last bought and 3 last sold. Purchases and sales are as reported on Forms 3, 4 and 5 — the SEC counts private transactions too, and many large sales follow a plan arranged in advance. Holdings are never added up: two spouses often report the same shares, and a joint filing carries a fund's.
| Insider | Role | Shares | % of company | Value | Last trade on file | Filed |
|---|---|---|---|---|---|---|
| Wallace Chiachang Kou | President and CEO · Director | 486,214 | 1.4% | $128.3M | — | Mar 18, 2026 |
| Pongchi James Chow | Director | 415,917 | 1.2% | $109.8M | — | Mar 18, 2026 |
| Lien Chun Liu | Director | 73,870 | 0.22% | $19.5M | — | Mar 18, 2026 |
| Po Hung Tsai | CFO | 48,250 | 0.14% | $12.7M | — | Mar 18, 2026 |
| Shiang Feng Chen | Director | 27,800 | 0.08% | $7.3M | — | Mar 18, 2026 |
| Yueh-Hua Lin | Vice President of Finance | 23,700 | 0.07% | $6.3M | — | Mar 18, 2026 |
| Shii Tyng Duann | Director | 15,200 | 0.05% | $4.0M | sold 1,500 shares at $245.00 on May 6, 2026 | May 6, 2026 |
| Kuan-Ming Lin | Director | 7,500 | 0.02% | $2.0M | sold 3,000 shares at $300.00 on Jun 17, 2026 | Jun 18, 2026 |
| Tsung-Ming Chung | Director | 7,500 | 0.02% | $2.0M | — | Mar 18, 2026 |
| Han-Ping Shieh | Director | 6,656 | 0.02% | $1.8M | sold 2,000 shares at $301.25 on Jun 2, 2026 | Jun 18, 2026 |
| Tao Cheng | VP of Manufacturing Operations | 6,000 | 0.02% | $1.6M | — | Mar 18, 2026 |
| Tsungtan Cain Lin | Director | 5,000 | 0.01% | $1.3M | — | Mar 18, 2026 |
| Shang-Tzu Ju | SVP of Platform and Strategy | 2,500 | <0.01% | $659,725.00 | — | Mar 18, 2026 |
Each insider at Silicon Motion
- Wallace Chiachang Kou — President and CEO · Director
- Pongchi James Chow — Director
- Lien Chun Liu — Director
- Po Hung Tsai — CFO
- Shiang Feng Chen — Director
- Yueh-Hua Lin — Vice President of Finance
- Shii Tyng Duann — Director
- Kuan-Ming Lin — Director
- Tsung-Ming Chung — Director
- Han-Ping Shieh — Director
- Tao Cheng — VP of Manufacturing Operations
- Tsungtan Cain Lin — Director
What insiders bought and sold across AI stocks · All filings on sec.gov