NASDAQ · Technology · 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.
Section freshness
Prices as of Sep 29, 9:52 AM EDT · Fundamentals checked Sep 29, 9:39 AM EDT
Ownership read
SIMO insider transaction activity: Net selling.
FMR, LLC is the largest institutional holder. 3 sales and 0 purchases appear in the recent Form 4 filings. 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
- Holder rows
- 10
- Yahoo Finance · Filing dates shown per row
- Increased / initiated
- 6
- 4 decreased · provider-reported changes
- Insider rows
- 3
- Yahoo Finance · Filing dates shown per row
Ownership concentration and transaction activity
- Top 10 reported holders
- 31.81% outstanding
- Changes with share-count history
- Prior-position data unavailable
- New / exited positions
- 0 / 0 explicitly reported
- Largest increase with share-count history
- Prior share counts unavailable
Reported-holder cohort only; absence from a limited provider list does not establish an exit. Changes are provider-reported and are only comparable quarter over quarter when the position periods match.
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 | Change % | Position / filing date |
|---|---|---|---|---|---|
| 1 | 6.72% | 2.28M | -32.97% | Position as of Jun 30, 2026Filing date unknown | |
| 2 | Acadian Asset Management. LLC | 3.88% | 1.32M | +1.71% | Position as of Jun 30, 2026Filing date unknown |
| 3 | 3.37% | 1.14M | +173.12% | Position as of Jun 30, 2026Filing date unknown | |
| 4 | Alkeon Capital Management LLC | 3.24% | 1.10M | +100.00% | Position as of Jun 30, 2026Filing date unknown |
| 5 | Hawk Ridge Capital Management, LP | 2.99% | 1.02M | -13.47% | Position as of Jun 30, 2026Filing date unknown |
| 6 | Reinhart Partners, LLC | 2.85% | 966.06K | -26.48% | Position as of Jun 30, 2026Filing date unknown |
| 7 | Polar Capital Holdings PLC | 2.75% | 931.38K | +100.00% | Position as of Jun 30, 2026Filing date unknown |
| 8 | Driehaus Capital Management, LLC | 2.32% | 786.07K | +54.14% | Position as of Jun 30, 2026Filing date unknown |
| 9 | Two Sigma Investments, LP | 2.07% | 701.11K | +155.34% | Position as of Jun 30, 2026Filing date unknown |
| 10 | Wolf Hill Capital Management, LP | 1.62% | 548.79K | -5.52% | 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.
| # | Insider | % company | Action | Shares | Price | Value | Transaction date |
|---|---|---|---|---|---|---|---|
| 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, 2026 |
| 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, 2026 |
| 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, 2026 |
Frequently asked
Common questions.
Who are the largest SIMO shareholders?
FMR, LLC is the largest reported institutional holder of SIMO, with 2.28 million shares, or about 6.72% of shares outstanding.
What does the institutional filing activity show for SIMO?
Silicon Motion Technology has 10 institutional rows on file: 6 increased or initiated positions and 4 reduced them.
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.
All data sources
Search the dated figures used for this view. Each entry identifies its units, reporting period and calculation status.
How to use this page
Use this to check who owns the float and whether insiders are active.
Best for Institutional concentration, insider transaction pattern, and float context.
Weak when Filings are delayed or transactions are administrative rather than economic.
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