Silicon Motion (ADR)
Designs NAND-flash controllers for SSD and embedded storage.
$246.00
After-hours close+0.50 (+0.20%)
At close$245.50(−3.76%)
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Breakdown13F · Form 4
Institutions 73.90%24.80M sharesInsiders 3.36%1.13M sharesOther 22.74%7.63M shares
Shares outstanding 33.56M · Float 32.14M · 95.8% free float
Institutions13F, as of Jun 30, 2026
404 holders · 24.80M shares · 151 new positions · 232 increased · 132 reduced · 39 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| FMR LLC | 2.28M | 6.79% | −1.12M | Aug 13, 2026 |
| Acadian Asset Management LLC | 1.32M | 3.92% | +22.1K | Aug 13, 2026 |
| Invesco Ltd. | 1.14M | 3.40% | +724.2K | Aug 14, 2026 |
| Alkeon Capital Management LLC | 1.10M | 3.28% | +1.10Mnew | Aug 14, 2026 |
| Hawk Ridge Capital Management LP | 1.02M | 3.03% | −158.1K | Aug 14, 2026 |
| Reinhart Partners, Inc. | 966.1K | 2.88% | −348.0K | Jul 8, 2026 |
| Polar Capital Holdings PLC | 931.4K | 2.78% | +931.4Knew | Aug 14, 2026 |
| Driehaus Capital Management LLC | 786.1K | 2.34% | +276.1K | Aug 14, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| FMR LLC | 10.00% | 13.59M | 13G | Dec 5, 2025 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Wallace Chiachang Kou | director, officer: President and CEO | 486.2K | 1.45% | Apr 9, 2026 |
| Pongchi James Chow | director | 415.9K | 1.24% | Mar 27, 2026 |
| Lien Chun Liu | director | 73.9K | 0.22% | Mar 27, 2026 |
| Po Hung Tsai | officer: CFO | 48.3K | 0.14% | Apr 9, 2026 |
| Shiang Feng Chen | director | 27.8K | 0.08% | Mar 27, 2026 |
| Yueh-Hua Lin | officer: Vice President of Finance | 23.7K | 0.07% | Apr 9, 2026 |
| Shii Tyng Duann | director | 15.2K | 0.05% | May 7, 2026 |
| Kuan-Ming Lin | director | 7.5K | 0.02% | Jun 24, 2026 |
| Tsung-Ming Chung | director | 7.5K | 0.02% | Mar 27, 2026 |
| Han-Ping Shieh | director | 6.7K | 0.02% | Jun 24, 2026 |
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Jun 18, 2026 | Kuan-Ming Lindirector | Sale | 1,000 | $320.31 | 7,500 |
| Jun 17, 2026 | Kuan-Ming Lindirector | Sale · 2 lots | 2,000 | $305.01 | 8,500 |
| Jun 18, 2026 | Han-Ping Shiehdirector | Sale | 1,000 | $328.00 | 6,656 |
| Jun 2, 2026 | Han-Ping Shiehdirector | Sale | 1,000 | $301.25 | 7,656 |
| May 6, 2026 | Shii Tyng Duanndirector | Sale | 1,500 | $245.00 | 15,200 |
CongressHouse and Senate disclosures
Not reported.