FMR LLC
Rank #1
2.49%
- Shares
- 3.40M
- Change
- —
- Change %
- 0.00%
- Filing
- Mar 31, 2026
Unchanged
Methodology published · Market data, model notes, and corrections process are public · Data policy · Corrections policy
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
Price Jun 15, 10:43 AM EDT · Statements Mar 30, 8:00 PM EDT
Source timingDetailsHide
Data freshness
Prices update fastest. Fundamentals, analyst data, and news update on their own schedules, so check these timestamps before comparing signals.
Price time means the latest available trade or regular-market close. Other times show when that section was checked or published.
PriceLive
Last traded •
Source: Market data provider
Fundamentalsevery 1 day
Provider checked •
Source: Market data provider
Analystevery 1 day
Provider checked •
Source: Market data provider
Newsevery 4 hr
Latest item •
Source: Market data provider
Ownership read
SIMO insider sentiment: Net selling.
FMR LLC is the largest loaded institutional holder. 1 sale rows and 0 purchase rows are visible in the loaded Form 4 history. Use the filters below to separate real buying and selling from option exercises, gifts, awards, and tax withholding.
Insider flow
SIMO
Purchases—
Sales15.20K
Directional bars ignore awards, gifts, conversions, and tax withholding rows.
Top holder
3.40M
FMR LLC
Insider stance
Net selling
$3.72M sold / — bought
Latest filing
May 6, 2026
Most recent holder or insider filing date
Rows loaded
121
120 holder / 1 insider
- Holder rows
- 120
- Market data source
- Latest filing
- May 6, 2026
- Most recent holder or insider filing date
- Increased / initiated
- 69
- 48 decreased in loaded rows
- Insider rows
- 1
- Market data source
Top 120 institutional holders
Silicon Motion Technology (SIMO) institutional ownership
Ranked by reported share count, with position changes and latest filing dates where ownership data supplies them.
REINHART PARTNERS
Rank #2
0.96%
- Shares
- 1.31M
- Change
- -259.32K
- Change %
- -16.48%
- Filing
- Mar 31, 2026
Decreased
ACADIAN ASSET MANAGEMENT LLC
Rank #3
0.95%
- Shares
- 1.29M
- Change
- +14.62K
- Change %
- +1.14%
- Filing
- Mar 31, 2026
Increased
HAWK RIDGE CAPITAL MANAGEMENT LP
Rank #4
0.86%
- Shares
- 1.17M
- Change
- +385.57K
- Change %
- +48.95%
- Filing
- Mar 31, 2026
Increased
LORD
Rank #5
0.70%
- Shares
- 962.14K
- Change
- -32.84K
- Change %
- -3.30%
- Filing
- Mar 31, 2026
Decreased
LAZARD ASSET MANAGEMENT LLC
Rank #6
0.57%
- Shares
- 781.98K
- Change
- +23.40K
- Change %
- +3.08%
- Filing
- Mar 31, 2026
Increased
ROBECO INSTITUTIONAL ASSET MANAGEMENT B.V.
Rank #7
0.46%
- Shares
- 631.58K
- Change
- +7.63K
- Change %
- +1.22%
- Filing
- Mar 31, 2026
Increased
WOLF HILL CAPITAL MANAGEMENT
Rank #8
0.42%
- Shares
- 580.85K
- Change
- -518
- Change %
- -9.00%
- Filing
- Mar 31, 2026
Decreased
MAN GROUP PLC
Rank #9
0.41%
- Shares
- 560.10K
- Change
- +179.06K
- Change %
- +46.99%
- Filing
- Mar 31, 2026
Increased
ANALOG CENTURY MANAGEMENT LP
Rank #10
0.39%
- Shares
- 538.75K
- Change
- +538.75K
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
DRIEHAUS CAPITAL MANAGEMENT LLC
Rank #11
0.37%
- Shares
- 509.98K
- Change
- +190.35K
- Change %
- +59.55%
- Filing
- Mar 31, 2026
Increased
SYSTEMATIC FINANCIAL MANAGEMENT LP
Rank #12
0.37%
- Shares
- 506.73K
- Change
- -76.10K
- Change %
- -13.06%
- Filing
- Mar 31, 2026
Decreased
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT
Rank #13
0.33%
- Shares
- 456.38K
- Change
- -78.56K
- Change %
- -14.69%
- Filing
- Mar 31, 2026
Decreased
KITE LAKE CAPITAL MANAGEMENT
Rank #14
0.33%
- Shares
- 452.57K
- Change
- -3.70K
- Change %
- -81.00%
- Filing
- Mar 31, 2026
Decreased
HIGHLAND PEAK CAPITAL
Rank #15
0.33%
- Shares
- 444.51K
- Change
- -52.11K
- Change %
- -10.49%
- Filing
- Mar 31, 2026
Decreased
NEUMEIER POMA INVESTMENT COUNSEL LLC
Rank #16
0.31%
- Shares
- 428.19K
- Change
- -53.63K
- Change %
- -11.13%
- Filing
- Mar 31, 2026
Decreased
ARROWSTREET CAPITAL
Rank #17
0.31%
- Shares
- 425.70K
- Change
- +225.22K
- Change %
- +1.12%
- Filing
- Mar 31, 2026
Increased
INVESCO LTD.
Rank #18
0.31%
- Shares
- 418.29K
- Change
- -213.82K
- Change %
- -33.83%
- Filing
- Mar 31, 2026
Decreased
PERTENTO PARTNERS LLP
Rank #19
0.30%
- Shares
- 412.54K
- Change
- -738.88K
- Change %
- -64.17%
- Filing
- Mar 31, 2026
Decreased
MILLENNIUM MANAGEMENT LLC
Rank #20
0.29%
- Shares
- 395.79K
- Change
- +248.76K
- Change %
- +1.69%
- Filing
- Mar 31, 2026
Increased
| # | Institution | % held | Shares | Change | Change % | Filing date |
|---|---|---|---|---|---|---|
| 1 | 2.49% | 3.40M | — Unchanged | 0.00% | Mar 31, 2026 | |
| 2 | REINHART PARTNERS | 0.96% | 1.31M | -259.32K Decreased | -16.48% | Mar 31, 2026 |
| 3 | ACADIAN ASSET MANAGEMENT LLC | 0.95% | 1.29M | +14.62K Increased | +1.14% | Mar 31, 2026 |
| 4 | HAWK RIDGE CAPITAL MANAGEMENT LP | 0.86% | 1.17M | +385.57K Increased | +48.95% | Mar 31, 2026 |
| 5 | LORD | 0.70% | 962.14K | -32.84K Decreased | -3.30% | Mar 31, 2026 |
| 6 | LAZARD ASSET MANAGEMENT LLC | 0.57% | 781.98K | +23.40K Increased | +3.08% | Mar 31, 2026 |
| 7 | ROBECO INSTITUTIONAL ASSET MANAGEMENT B.V. | 0.46% | 631.58K | +7.63K Increased | +1.22% | Mar 31, 2026 |
| 8 | WOLF HILL CAPITAL MANAGEMENT | 0.42% | 580.85K | -518 Decreased | -9.00% | Mar 31, 2026 |
| 9 | MAN GROUP PLC | 0.41% | 560.10K | +179.06K Increased | +46.99% | Mar 31, 2026 |
| 10 | ANALOG CENTURY MANAGEMENT LP | 0.39% | 538.75K | +538.75K Initiated | — | Mar 31, 2026 |
| 11 | DRIEHAUS CAPITAL MANAGEMENT LLC | 0.37% | 509.98K | +190.35K Increased | +59.55% | Mar 31, 2026 |
| 12 | SYSTEMATIC FINANCIAL MANAGEMENT LP | 0.37% | 506.73K | -76.10K Decreased | -13.06% | Mar 31, 2026 |
| 13 | SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT | 0.33% | 456.38K | -78.56K Decreased | -14.69% | Mar 31, 2026 |
| 14 | KITE LAKE CAPITAL MANAGEMENT | 0.33% | 452.57K | -3.70K Decreased | -81.00% | Mar 31, 2026 |
| 15 | HIGHLAND PEAK CAPITAL | 0.33% | 444.51K | -52.11K Decreased | -10.49% | Mar 31, 2026 |
| 16 | NEUMEIER POMA INVESTMENT COUNSEL LLC | 0.31% | 428.19K | -53.63K Decreased | -11.13% | Mar 31, 2026 |
| 17 | ARROWSTREET CAPITAL | 0.31% | 425.70K | +225.22K Increased | +1.12% | Mar 31, 2026 |
| 18 | 0.31% | 418.29K | -213.82K Decreased | -33.83% | Mar 31, 2026 | |
| 19 | PERTENTO PARTNERS LLP | 0.30% | 412.54K | -738.88K Decreased | -64.17% | Mar 31, 2026 |
| 20 | MILLENNIUM MANAGEMENT LLC | 0.29% | 395.79K | +248.76K Increased | +1.69% | Mar 31, 2026 |
Showing 20 of 120 matching institutional rows.Load more institutions
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.
DUANN SHII TYNG
- Shares
- 15.20K
- % company
- 0.04%
- Price
- $245.00
- Value
- $3,724,000
Filed May 6, 2026
| # | Insider | % company | Action | Shares | Price | Value | Filing date |
|---|---|---|---|---|---|---|---|
| 1 | DUANN SHII TYNG | 0.04% | Sale | 15.20K | $245.00 | $3,724,000 | May 6, 2026 |
Showing 1 of 1 matching Form 4 rows. Percent of company uses current shares outstanding when available.
Frequently asked
Common questions.
Who are the largest SIMO shareholders?
FMR LLC is the largest institutional holder in the loaded SIMO ownership dataset, with 3.40 million shares, or about 2.49% of shares outstanding. The table ranks additional institutions by reported share count.
What is institutional ownership of SIMO?
The current TECHi snapshot has 120 loaded institutional rows for Silicon Motion Technology. 69 rows are marked increased or initiated, while 48 rows are marked decreased, with the latest holder filing dated Mar 31, 2026.
Where can I see Silicon Motion Technology insider transactions?
The insider transaction table currently shows 1 loaded Form 4 rows for SIMO, with the latest insider filing dated May 6, 2026. It separates purchases, sales, option exercises, awards, gifts, and tax withholding so administrative transactions are not confused with open-market trades.
Are SIMO insiders buying or selling?
The loaded SIMO Form 4 rows currently read Net selling: 1 sale rows and 0 purchase rows. Awards, gifts, conversions, and tax withholding are shown separately because they do not carry the same signal as open-market buying or selling.
Who is the most active SIMO insider in the loaded filings?
DUANN SHII TYNG is the most active insider by absolute share movement in the loaded SIMO rows, with 15,200 shares moving across the visible filing history. Review the action labels before treating that activity as buying or selling.