NASDAQ · Holders
Silicon Motion Technology (SIMO) Institutional Ownership & Insider Trading History
Top SIMO institutional shareholders, filing changes, and Form 4 insider activity with filters for buys, sales, option exercises, gifts, and tax withholding.
- Last confirmed price
- $187.96-15.45%
- Oct 22, 2026, 4:00 PM EDT · Prices may be delayed
Data dates
Prices as of Oct 22, 4:00 PM EDT · Fundamentals checked Oct 23, 6:20 AM EDT · Statement period ended Dec 31, 2025
Ownership read
SIMO insider transaction activity: Net selling.
FMR, LLC is the largest institutional holder. 3 classified sales and 0 classified purchases appear in the recent insider records. Use the filters below to separate open-market activity from option exercises, gifts, awards, and tax withholding.
Insider flow
SIMO
Directional bars ignore awards, gifts, conversions, and tax withholding rows.
Top holder
2.28M
FMR, LLC
Insider transaction activity
Net selling
$1.93M sold / $0.0000 bought
Observations shown
13
10 holder / 3 insider
- Increased / initiated
- Unavailable
- Prior positions were not supplied
- Insider rows
- 3
- Transaction dates shown per row
Percent outstanding uses the quote share count, market cap divided by the share price (134.24M shares). The holder feed's percentages used a different share count, so they are not the figures on this page.
Ownership concentration and transaction activity
- Top 10 reported holders
- Position dates differ
- Changes with share-count history
- Prior-position data unavailable
- New / exited positions
- Prior-position data unavailable
- Largest increase with share-count history
- Prior share counts unavailable
These changes cover the holders shown. A holder missing from this list may still own shares. Compare positions from the same reporting quarters.
Net shares sold: 6,500
Sale-code S shares minus purchase-code P shares in this sample. Includes disclosed plans and unknown plan status; excludes grants, gifts, exercises and withholding. This is activity, not sentiment.
- Purchase / sale; plan unknown: 3
Top 10 institutional holders
Silicon Motion Technology (SIMO) institutional ownership
Ranked by reported share count, with position changes and separate position and filing dates where ownership data supplies them.
| # | Institution | % held | Shares | Position / filing date |
|---|---|---|---|---|
| 1 | 1.70% | 2.28M | Position as of Jun 30, 2026Filing date unknown | |
| 2 | Acadian Asset Management. LLC | 0.98% | 1.32M | Position as of Jun 30, 2026Filing date unknown |
| 3 | 0.85% | 1.14M | Position as of Jun 30, 2026Filing date unknown | |
| 4 | Alkeon Capital Management LLC | 0.82% | 1.10M | Position as of Jun 30, 2026Filing date unknown |
| 5 | Hawk Ridge Capital Management, LP | 0.76% | 1.02M | Position as of Jun 30, 2026Filing date unknown |
| 6 | Polar Capital Holdings PLC | 0.69% | 931.38K | Position as of Jun 30, 2026Filing date unknown |
| 7 | Reinhart Partners, LLC | 0.69% | 919.63K | Position as of Sep 30, 2026Filing date unknown |
| 8 | Driehaus Capital Management, LLC | 0.59% | 786.07K | Position as of Jun 30, 2026Filing date unknown |
| 9 | Two Sigma Investments, LP | 0.52% | 701.11K | Position as of Jun 30, 2026Filing date unknown |
| 10 | Wolf Hill Capital Management, LP | 0.41% | 548.79K | Position as of Jun 30, 2026Filing date unknown |
Recent insider transactions
Silicon Motion Technology (SIMO) Form 4 filings
Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding. Window: May 6, 2026–Jun 18, 2026 · 3 records.
| # | Insider | % company | Action | Shares | Price | Value | Transaction / filing |
|---|---|---|---|---|---|---|---|
| 1 | LIN KUAN-MING Director | <0.01% | SaleOpen-market or direct sale reported on Form 4.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 3.00K | $310.11 | $930,320 | Jun 18, 2026Filing date unavailableOriginal filing link unavailable |
| 2 | SHIEH HAN-PING PH.D. Director | <0.01% | SaleOpen-market or direct sale reported on Form 4.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 2.00K | $314.63 | $629,250 | Jun 18, 2026Filing date unavailableOriginal filing link unavailable |
| 3 | DUANN SHII-TYNG Director | <0.01% | SaleOpen-market or direct sale reported on Form 4.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 1.50K | $245.00 | $367,500 | May 6, 2026Filing date unavailableOriginal filing link unavailable |
Frequently asked
Questions about this quote
Who are the largest SIMO shareholders?
FMR, LLC is the largest reported institutional holder of SIMO, with 2.28 million shares, or about 1.70% of shares outstanding.
What does the institutional filing activity show for SIMO?
Silicon Motion Technology has 10 institutional rows on file. Previous position sizes are unavailable, so increases and reductions cannot be determined.
What insider transactions are available for SIMO?
TECHi shows 3 dated SIMO insider transactions through Jun 18, 2026, with transaction types kept separate so administrative actions are not presented as open-market trades.
Are SIMO insiders buying or selling?
The displayed SIMO activity reads Net selling: 3 sales and 0 purchases. Other transaction types remain separate.
Who is the most active reported SIMO insider?
LIN KUAN-MING has the largest absolute share movement in the displayed SIMO filing rows, totaling 3,000 shares. The action labels provide the transaction context.
What this page answers
Check who owns the float and whether insiders are active.
Explore Institutional concentration, insider transaction pattern, and float context.
Keep in mind Filings are delayed or transactions are administrative rather than economic.
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