Comparable stake leader
FMR LLC
SEC ownership of Silicon Motion Technology CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001329394.
Disclosed value leader
FMR LLC
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- SIMO on Nasdaq
- Parsed ownership sources
- 13D/G and 13F
- Largest SEC-reported holder
- FMR LLC
- Latest 13D/G holder
- FMR LLC
- Latest parsed ownership date
- 31 Mar 2026
- Issuer CIK
- 0001329394
- Issuer location
- Hong Kong Island, Hong Kong
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Silicon Motion Technology CORP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
FMR LLC
Disclosed value leader
FMR LLC
Comparable rows
50/50
Latest evidence
31 Mar 2026
13D/G
13F
Lead comparable stake: 10%
13D/G row: FMR LLC
Showing 1-8 of 50 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 10%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens FMR LLC's linked filing trail.
Comparable ownership
Top 5
FMR LLC
10%
REINHART PARTNERS, LLC.
0.97%
ACADIAN ASSET MANAGEMENT LLC
0.95%
HAWK RIDGE CAPITAL MANAGEMENT LP
0.86%
LORD, ABBETT & CO. LLC
0.71%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| FMR LLC |
13D/G
13F
Company
|
10%
|
$1,267,047,152
13,593,468 shares
|
+$2,983 | 28 Nov 2025 |
| REINHART PARTNERS, LLC. |
13F
Company
|
0.97%
|
$147,555,086
1,314,039 shares
|
— | 31 Mar 2026 |
| ACADIAN ASSET MANAGEMENT LLC |
13F
Company
|
0.95%
|
$145,225,000
1,293,710 shares
|
— | 31 Mar 2026 |
| HAWK RIDGE CAPITAL MANAGEMENT LP |
13F
Company
|
0.86%
|
$131,751,541
1,173,315 shares
|
— | 31 Mar 2026 |
| LORD, ABBETT & CO. LLC |
13F
Company
|
0.71%
|
$108,039,000
962,139 shares
|
— | 31 Mar 2026 |
| LAZARD ASSET MANAGEMENT LLC |
13F
Company
|
0.58%
|
$87,808,630
781,981 shares
|
— | 31 Mar 2026 |
| Robeco Institutional Asset Management B.V. |
13F
Company
|
0.46%
|
$70,920,232
631,581 shares
|
— | 31 Mar 2026 |
| Wolf Hill Capital Management, LP |
13F
Company
|
0.43%
|
$65,223,871
580,852 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$367,500.
Buys
$0
Insiders: 0
Sells
$367,500
Insiders: 1
Net
-$367,500
Shares: -1,500
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 1,500
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 1,500 | $0 | $367,500 | -$367,500 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-13 of 13 reporting-owner rows connected to Silicon Motion Technology CORP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
13
Largest Forms 3/4/5 holder
Shii Tyng Duann
Net 12M change
-$367,500
Latest report
06 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Shii Tyng Duann | Director | $3,724,000 | -$367,500 | -9% | Filing P/S | 06 May 2026 |
| Pongchi James Chow | Director | Mixed | 18 Mar 2026 | |||
| Tsung-Ming Chung | Director | Mixed | 18 Mar 2026 | |||
| Lien Chun Liu | Director | Mixed | 18 Mar 2026 | |||
| Kuan-Ming Lin | Director | Mixed | 18 Mar 2026 | |||
| Shiang Feng Chen | Director | Mixed | 18 Mar 2026 | |||
| Han-Ping Shieh | Director | Mixed | 18 Mar 2026 | |||
| Tao Cheng | VP of Manufacturing Operations | Mixed | 18 Mar 2026 | |||
| Yueh-Hua Lin | Vice President of Finance | Mixed | 18 Mar 2026 | |||
| Wallace Chiachang Kou | President and CEO, Director | Mixed | 18 Mar 2026 | |||
| Tsungtan Cain Lin | Director | Mixed | 18 Mar 2026 | |||
| Po Hung Tsai | Cfo | Mixed | 18 Mar 2026 | |||
| Shang-Tzu Ju | SVP of Platform and Strategy | Mixed | 18 Mar 2026 |
Recent insider transactions for Silicon Motion Technology CORP
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Shii Tyng Duann | SIMO | American depositary shares | Sale | -8.98% | $367,500 | $245.00 | -1,500 | 15,200 | 06 May 2026 | Direct |
* marks a reported price that did not pass the local price check.