SIMO Silicon Motion Technology (SIMO) Insider Trading, Ownership & Congress Trades
Semiconductors & Electronics · Semiconductors & related devices · CIK 0001329394
SEC filings
Insider buyers, 180 days
0
House members buying, 1 year
0
STOCK Act, US House only, disclosed up to 45 days after the trade
Funds added, last quarter
228
13F, latest reported quarter
What the filings say about SIMO
Insiders, 180 days
-$1.9M net sold
3 sellers · 0% of sales under a 10b5-1 plan
Silicon Motion Technology insider trades (Form 4)
Form 4 buys and sells (codes P and S). Grants, option exercises
and conversions excluded.
Over the last 180 days, Silicon Motion Technology CORP insiders sold a net $1.9M of stock across 6 Form 4 purchases and sales, with no insider buying. Source: SEC Form 4 filings, as of 2026-10-28.
Foreign private issuer: most of its insiders are exempt from SEC Form 4, but some still file it; those filings are listed below, and the record may be incomplete.
Insider
Filed
Shares
Value
Since filing
Context
- 1 earlier Form 4 trade (code P or S) here by this insider (1 sale), the last on Jun 2, 2026.
- The trade is 15.0% of the 6,655 shares held after it.
- 1 other insider sold within 30 days.
- 228 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director SHIEH HAN-PING sold about $328.0K of SIMO on Jun 18, 2026; 1 other insider sold within 30 days and 228 funds added in the latest 13F quarter.Context
- 2 earlier Form 4 trades (code P or S) here by this insider (2 sales), the last on Jun 17, 2026.
- The trade is 13.3% of the 7,500 shares held after it.
- 1 other insider sold within 30 days.
- 228 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director LIN KUAN-MING sold about $320.3K of SIMO on Jun 18, 2026; 1 other insider sold within 30 days and 228 funds added in the latest 13F quarter.Context
- First Form 4 purchase or sale (code P or S) here by this insider on our record.
- The trade is 11.8% of the 8,500 shares held after it.
- 1 other insider sold within 30 days.
- 228 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director LIN KUAN-MING sold about $310.0K of SIMO on Jun 17, 2026; 1 other insider sold within 30 days and 228 funds added in the latest 13F quarter.Context
- First Form 4 purchase or sale (code P or S) here by this insider on our record.
- The trade is 10.5% of the 9,500 shares held after it.
- 1 other insider sold within 30 days.
- 228 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director LIN KUAN-MING sold about $300.0K of SIMO on Jun 17, 2026; 1 other insider sold within 30 days and 228 funds added in the latest 13F quarter.Context
- First Form 4 purchase or sale (code P or S) here by this insider on our record.
- The trade is 13.1% of the 7,655 shares held after it.
- 2 other insiders sold within 30 days.
- 228 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director SHIEH HAN-PING sold about $301.2K of SIMO on Jun 2, 2026; 2 other insiders sold within 30 days and 228 funds added in the latest 13F quarter.6 transactions on record
Since filing: total return from the first close after the filing to the latest close, dividend-adjusted. Not a forecast.
Context lines are counts over the filings above and returns from our own price history, never a price level. Not investment advice.
Seven facts, ranked against the sector ·
Rank is not a forecast
Insiders
net -$1.9M over 180 days
more than 62% of Semiconductors & Electronics
Congress
no House purchase disclosed in the last 12 months
Funds
228 funds bought in last quarter
more than 66% of Semiconductors & Electronics
Revenue
+10.2% year over year
below 51% of Semiconductors & Electronics
Margin
13.8% net margin
more than 81% of Semiconductors & Electronics
Buybacks
$24.3M repurchased, FY to 2025-12-31
below 54% of Semiconductors & Electronics
Short interest
4.7% of the float short (float per yahoo 2026-10-26) · 2.3 days to cover · settled 2026-09-30
below 79% of Semiconductors & Electronics
What changed in the last 30 days
Oct 28Insider selling stopped: no sales in 90 days after 6 in the prior 90
Why it matters
The absence is the signal: 6 sales in one 90-day window and none in the next is a change of behaviour, not a filing.
Watch SIMO
A free account keeps a watchlist and can send one email a day when insiders, funds or Congress file on the names in it. No password and no card.
The year, with the filings on it
Total return over 12 months. Each marker is a filing; hover or tap one for the detail.
+101.8%12M
Insider sell
Indexed to 100, dividend-adjusted, not a price chart.
When a name files heavily, the largest trades are drawn first.
Who owns SIMO: institutional holders (13F)
13F holdings, latest reported quarter
2,277,824 sh
$759.3M
1,142,437 sh
$380.8M
1,100,000 sh
$366.7M
1,015,215 sh
$338.4M
966,060 sh
$322.0M
Congress trades in SIMO
No Congress trades reported
No House member has disclosed a trade in this stock. See what Congress is buying.
Activist and 5% holders (13D/13G)
No 5%+ ownership filings
Nobody has filed for crossing 5%. That is a fact, not missing data.
SIMO planned insider sales (Form 144)
No planned-sale notices
No insider has filed to sell. Watch this after a run-up.
SIMO mutual fund holders (N-PORT)
Funds ranked by the share of their own portfolio in this stock (N-PORT).
AVE MARIA GROWTH FUND
$90.0M position · as of 2026-06-30
7.1%
Reinhart Genesis PMV Fund
$48.2M position · as of 2026-05-31
6.7%
BLACK OAK EMERGING TECHNOLOGY FUND
$4.4M position · as of 2026-07-31
6.7%
Bahl & Gaynor Small/Mid Cap Income Growth ETF
$97.0M position · as of 2026-06-30
6.7%
Oberweis Micro-Cap Fund
$101.6M position · as of 2026-06-30
6.3%
Small-Cap Value Series
$24.1M position · as of 2026-05-31
6.2%
SEC N-PORT, monthly, about 60 days late · funds ≥ $10M ·
% is the share of the fund's own portfolio
Live price
Daily candles from TradingView, under their licence. No filings marked.
Why this name is on the desk
The complete filing record, in one place.
The record shows a net $1.9M sold by insiders over 180 days, 228 funds added last quarter. Each figure is a federal filing, dated the day it went public.
SIMO financials
Revenue growth
+10.2%
XBRL, annual
Net margin
13.8%
Ratios from the company's XBRL filings, latest filings
Revenue, TTM
n/a
fewer than four consecutive quarters of revenue filed
Revenue, TTM SIMO
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| none filed |
At each fiscal year end
Single quarter
Net margin, TTM
n/a
needs four consecutive quarters of both revenue and net income
Net margin, TTM SIMO
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| none filed |
At each fiscal year end
Single quarter
Free cash flow, TTM
n/a
fewer than four consecutive quarters of operating cash flow
Free cash flow, TTM SIMO
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| none filed |
At each fiscal year end
Single quarter
Debt to equity
0.00x
long-term 2017-12-31 plus current 2023-12-31; equity 2025-12-31
Debt to equity SIMO
| FY Dec 2025 | 0.00x |
| FY Dec 2024 | 0.00x |
| FY Dec 2023 | 0.00x |
| FY Dec 2022 | 0.00x |
| FY Dec 2021 | 0.00x |
| none filed |
At each fiscal year end
Trailing four quarters at each quarter end
Cash flow to debt
n/a
needs four quarters of operating cash flow
Cash flow to debt SIMO
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| none filed |
At each fiscal year end
Trailing four quarters at each quarter end
Return on equity
n/a
fewer than four consecutive quarters of net income
Return on equity SIMO
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| none filed |
At each fiscal year end
Trailing four quarters at each quarter end
Return on assets
n/a
fewer than four consecutive quarters of net income
Return on assets SIMO
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| none filed |
At each fiscal year end
Trailing four quarters at each quarter end
Return on invested capital
n/a
fewer than four consecutive quarters of operating income
Return on invested capital SIMO
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| none filed |
At each fiscal year end
Trailing four quarters at each quarter end
Return on capital employed
n/a
fewer than four consecutive quarters of operating income
Return on capital employed SIMO
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| none filed |
At each fiscal year end
Trailing four quarters at each quarter end
P/E, trailing
n/a
fewer than four consecutive quarters of diluted EPS
P/E, trailing SIMO
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| none filed |
At each fiscal year end
Trailing four quarters at each quarter end
Enterprise value
$25.2B
market value at close 2026-10-26 on 2025-12-31 shares, plus long-term 2017-12-31 plus current 2023-12-31, minus cash 2025-12-31
Enterprise value SIMO
| FY Dec 2025 | $12.2B |
| FY Dec 2024 | $7.0B |
| FY Dec 2023 | $7.9B |
| FY Dec 2022 | $8.4B |
| FY Dec 2021 | $12.9B |
| none filed |
At each fiscal year end
Trailing four quarters at each quarter end
FCF yield
n/a
fewer than four consecutive quarters of operating cash flow
FCF yield SIMO
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| none filed |
At each fiscal year end
Trailing four quarters at each quarter end
PEG, trailing
n/a
fewer than four consecutive quarters of diluted EPS
PEG, trailing SIMO
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| none filed |
At each fiscal year end
Trailing four quarters at each quarter end
Price as of 2026-10-26. Hover or tap a tile for its yearly and quarterly history.
Method
TTM is four consecutive fiscal quarters; Q4 is the year minus nine months when not filed. Returns use the average of opening and closing balances. EBIT is approximated by operating income. PEG uses trailing EPS growth.
Fundamentals
Annual figures from XBRL filings. Pick a past date to see them as known then.
| 2025-12 | 2024-12 | 2023-12 | 2022-12 | |
|---|---|---|---|---|
| Revenue | $885.6M | $803.6M | $639.1M | $945.9M |
| Gross profit | $427.5M | $368.8M | $270.4M | $465.8M |
| Operating income | $93.0M | $90.9M | $39.9M | $213.9M |
| Net income | $122.6M | $89.2M | $52.9M | $172.5M |
| EPS (diluted) | 0.91 | 0.66 | 0.40 | 1.29 |
| Operating cash flow | $61.4M | $77.1M | $149.1M | $83.9M |
| Cash | $201.8M | $276.1M | $314.3M | $232.2M |
| Buybacks | $24.3M | $0 | $0 | $133.2M |
| Dividends paid | $67.2M | $67.3M | $16.7M | $49.9M |
SEC XBRL, fiscal years, as known on 2026-10-28
SIMO Stock Sonar score 5/7 axes
Find similar shapesCompareSIMO ranks highest on financial health (91st percentile) and institutional and government (66th), and lowest on insider conviction (30th), among Semiconductors & Electronics peers.
5 of 7 axes scored. Each is a percentile against sector peers (all companies when the sector is thin); higher is better. An unscored axis is unmeasured, not low. How it is scored
SIMO filings, in plain words
Are Silicon Motion Technology insiders buying or selling SIMO?
In the 180 days to 2026-10-28, Silicon Motion Technology insiders were net sellers, a net $1.9M across purchases and sales reported on Form 4, by 3 sellers.
Read the full summary
In the 180 days to 2026-10-28, Silicon Motion Technology insiders were net sellers of SIMO, a net $1.9M across purchases and sales reported on Form 4 by 3 sellers. None of the 6 insider sales was flagged as made under a Rule 10b5-1 plan. Each figure is counted from SEC and House filings as of 2026-10-28, dated the day the filing was made public.
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