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ASX ASE Technology Holding (ASX) Insider Trading, Ownership & Congress Trades

Semiconductors & Electronics · Semiconductors & related devices · CIK 0001122411
Quote by TradingView
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
307
13F, latest reported quarter
Conversions, 180 days
7
Codes C/M, not in net · $317.8M priced

What the filings say about ASX

Insiders, 180 days
-$71.5M net sold
2 sellers · 0% of sales under a 10b5-1 plan
Congress, 1 year
No trades
Last one: sale, 2025-03-18

ASE Technology Holding insider trades (Form 4)

Form 4 buys and sells (codes P and S). Grants, option exercises and conversions excluded.

Over the last 180 days, ASE Technology Holding Co., Ltd. insiders sold a net $71.5M of stock across 39 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
Uang Du-Tsuen
Chief Administration Officer
SELL
2026-10-14 SECtraded 2026-10-12
3,000
$2.3M
+0.4%
Context
  • 11 earlier Form 4 trades (code P or S) here by this insider (11 sales), the last on Jul 22, 2026.
  • The trade is 0.4% of the 838,000 shares held after it.
  • No other insider sold within 30 days.
  • 307 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Chief Administration Officer Uang Du-Tsuen sold about $2.3M of ASX on Oct 12, 2026; 307 funds added in the latest 13F quarter.
Uang Du-Tsuen
Chief Administration Officer
SELL
2026-07-24 SECtraded 2026-07-22
3,000
$2.0M
+15.1%
Context
  • 10 earlier Form 4 trades (code P or S) here by this insider (10 sales), the last on Jul 15, 2026.
  • The trade is 0.4% of the 751,000 shares held after it.
  • No other insider sold within 30 days.
  • 307 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Chief Administration Officer Uang Du-Tsuen sold about $2.0M of ASX on Jul 22, 2026; 307 funds added in the latest 13F quarter.
Uang Du-Tsuen
Chief Administration Officer
SELL
2026-07-17 SECtraded 2026-07-15
3,000
$2.1M
+14.0%
Context
  • 9 earlier Form 4 trades (code P or S) here by this insider (9 sales), the last on Jul 6, 2026.
  • The trade is 0.4% of the 754,000 shares held after it.
  • No other insider sold within 30 days.
  • 307 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Chief Administration Officer Uang Du-Tsuen sold about $2.1M of ASX on Jul 15, 2026; 307 funds added in the latest 13F quarter.
Uang Du-Tsuen
Chief Administration Officer
SELL
2026-07-08 SECtraded 2026-07-06
2,000
$1.4M
-2.8%
Context
  • 8 earlier Form 4 trades (code P or S) here by this insider (8 sales), the last on Jul 1, 2026.
  • The trade is 0.3% of the 757,000 shares held after it.
  • No other insider sold within 30 days.
  • 307 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Chief Administration Officer Uang Du-Tsuen sold about $1.4M of ASX on Jul 6, 2026; 307 funds added in the latest 13F quarter.
Uang Du-Tsuen
Chief Administration Officer
SELL
2026-07-02 SECtraded 2026-07-01
3,000
$2.1M
-2.9%
Context
  • 7 earlier Form 4 trades (code P or S) here by this insider (7 sales), the last on Jun 30, 2026.
  • The trade is 0.4% of the 759,000 shares held after it.
  • No other insider sold within 30 days.
  • 307 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Chief Administration Officer Uang Du-Tsuen sold about $2.1M of ASX on Jul 1, 2026; 307 funds added in the latest 13F quarter.
39 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.
See all insider buying · insider selling
Showing the latest few. to see 34 more transactions and use the screener and CSV export. We store only your email; there is no password.
Seven facts, ranked against the sector · Rank is not a forecast
Insiders
net -$71.5M over 180 days
-$2.3M over 90 days
below 85% of Semiconductors & Electronics
Congress
no House purchase disclosed in the last 12 months
Funds
307 funds bought in last quarter
more than 74% of Semiconductors & Electronics
Revenue
no revenue reported in any filing
Margin
no margin: no revenue reported
Buybacks
no share repurchases reported
Short interest
0.7% of the float short (float per yahoo 2026-10-26) · 1.6 days to cover · settled 2026-09-30
below 88% of Semiconductors & Electronics
What changed in the last 30 days
Oct 14Chief Administration Officer Uang Du-Tsuen sold $2.3M (Oct 12)

Watch ASX

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.
+231.4%12M
+0%+92%+183%+275%2025-102025-122026-022026-042026-062026-082026-10 2026-04-20 · Chen Tien-Szu sold $152.6M2026-04-20 · Chen Tien-Szu sold $37.7M2026-04-20 · Chen Tien-Szu sold $33.6M2026-04-20 · Chen Tien-Szu sold $23.4M2026-05-26 · Chen Jeffrey sold $5.7M2026-05-25 · Chen Jeffrey sold $5.3M2026-05-15 · Chen Jeffrey sold $5.1M2026-05-14 · Chen Jeffrey sold $5.0M2026-05-22 · Chen Jeffrey sold $4.8M2026-05-18 · Chen Jeffrey sold $4.6M2026-05-21 · Chen Jeffrey sold $4.5M2026-04-23 · Chen Jeffrey sold $4.4M2026-05-19 · Chen Jeffrey sold $4.3M2026-05-20 · Chen Jeffrey sold $4.3M2026-04-24 · Chen Jeffrey sold $4.3M2026-04-22 · Chen Jeffrey sold $4.2M2026-04-21 · Chen Jeffrey sold $4.2M2026-04-20 · Chen Jeffrey sold $4.2M2026-04-17 · Chen Jeffrey sold $4.1M2026-04-16 · Chen Jeffrey sold $4.0M2026-04-15 · Chen Jeffrey sold $3.9M2026-04-14 · Chen Jeffrey sold $3.8M2026-04-13 · Chen Jeffrey sold $3.7M2026-04-09 · Chen Jeffrey sold $3.5M2026-04-10 · Chen Jeffrey sold $3.5M2026-04-08 · Chen Jeffrey sold $3.4M2026-06-22 · Uang Du-Tsuen sold $3.3M2026-06-03 · Uang Du-Tsuen sold $3.1M2026-06-01 · Uang Du-Tsuen sold $3.0M2026-10-12 · Uang Du-Tsuen sold $2.3M2026-07-01 · Uang Du-Tsuen sold $2.1M2026-06-23 · Uang Du-Tsuen sold $2.1M2026-07-15 · Uang Du-Tsuen sold $2.1M2026-07-22 · Uang Du-Tsuen sold $2.0M2026-06-30 · Uang Du-Tsuen sold $2.0M2026-06-18 · Uang Du-Tsuen sold $1.8M2026-06-30 · Uang Du-Tsuen sold $1.4M2026-07-06 · Uang Du-Tsuen sold $1.4M2026-05-27 · Chen Jeffrey sold $1.3M
Insider sell
Indexed to 100, dividend-adjusted, not a price chart. When a name files heavily, the largest trades are drawn first.

Who owns ASX: institutional holders (13F)

13F holdings, latest reported quarter
BlackRock, Inc.
26,255,012 sh
$1.2B
BANK OF AMERICA CORP /DE/
9,387,504 sh
$423.6M
GOLDMAN SACHS GROUP INC
8,300,320 sh
$374.5M
LAZARD ASSET MANAGEMENT LLC
7,970,225 sh
$359.6M
UBS Group AG
7,787,150 sh
$351.4M

Congress trades in ASX

STOCK Act disclosures, US House only, filed up to 45 days after the trade
Sheri Biggs
Sold 2025-03-18 · disclosed 201 days later
$1,001 - $15,000
All stocks members of Congress are buying · Every member's trades

Activist and 5% holders (13D/13G)

No 5%+ ownership filings
Nobody has filed for crossing 5%. That is a fact, not missing data.

ASX planned insider sales (Form 144)

No planned-sale notices
No insider has filed to sell. Watch this after a run-up.

ASX mutual fund holders (N-PORT)

Funds ranked by the share of their own portfolio in this stock (N-PORT).
PROFUND VP ASIA 30
$3.7M position · as of 2026-06-30
16.2%
PROFUND VP EMERGING MARKETS
$1.4M position · as of 2026-06-30
4.2%
YieldMax(R) Semiconductor Portfolio Option Income ETF
$38.6M position · as of 2026-07-31
3.8%
National Security Emerging Markets Index ETF
$1.5M position · as of 2026-05-31
3.6%
ULTRAEMERGING MARKETS PROFUND
$326.2K position · as of 2026-07-31
2.8%
YieldMax(R) Target 12(TM) Semiconductor Option Income ETF
$1.7M position · as of 2026-07-31
2.6%
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 $71.5M sold by insiders over 180 days, 307 funds added last quarter. Each figure is a federal filing, dated the day it went public.
Backtest this pattern Open the screener
Same sector, ranked by filing activity
Sector by SEC SIC code
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ASX financials

Fundamentals
Annual figures from XBRL filings. Pick a past date to see them as known then.
2025-122024-122023-122022-12
Gross profit$114.2B$96.9B$91.8B$134.9B
Net income$41.2B$33.8B$37.3B$64.6B
SEC XBRL, fiscal years, as known on 2026-10-28

ASX Stock Sonar score 3/7 axes

Find similar shapesCompare

ASX ranks highest on risk and compliance (86th percentile) and institutional and government (74th), and lowest on insider conviction (8th), among Semiconductors & Electronics peers.

Insider conviction
8
Inputs
  • Net Form 4 buying (codes P and S), 180d-$71.5M · 16 pct, sector of 147
  • Insider buyers, 180d0 · 0 pct, sector of 151
Institutional and government
74
Inputs
  • Funds adding, latest quarter307 · 74 pct, sector of 184
  • Congress net buyers, 365dno Congress trades in 365 days
  • Federal contracts, 180dno federal contracts in 180 days
  • Lobbying spend, 4 quartersno lobbying filings in the last four quarters
Risk and compliance
86
Inputs
  • Short interest, % of float+0.7% · 86 pct, sector of 221
  • Recalls per $1B revenue, 3yrevenue under $50M or not filed, so a count cannot be scaled to size
  • EPA cases per $1B revenue, 5yrevenue under $50M or not filed, so a count cannot be scaled to size
  • New text in Risk Factors, latest 10-Kneeds two 10-Ks with a Risk Factors section (not 20-F filers or stubs)
4 not measured: Profitability, Financial health, Growth, US patents
  • Profitability needs 2 of 4 inputs, 0 present: fewer than four consecutive quarters of net income; fewer than four consecutive quarters of operating income
  • Financial health needs 1 of 2 inputs, 0 present: no debt line filed
  • Growth needs 1 of 2 inputs, 0 present: no backlog line filed, or no year-earlier backlog; no revenue for this year and the year before
  • US patents needs 1 of 2 inputs, 0 present: patent data not loaded yet

3 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

ASX filings, in plain words

Are ASE Technology Holding insiders buying or selling ASX?

In the 180 days to 2026-10-28, ASE Technology Holding insiders were net sellers, a net $71.5M across purchases and sales reported on Form 4, by 2 sellers.

Have members of Congress traded ASX?

Yes, but not in the year to 2026-10-28; the latest on record is a sale by Sheri Biggs dated 2025-03-18.

Read the full summary

In the 180 days to 2026-10-28, ASE Technology Holding insiders were net sellers of ASX, a net $71.5M across purchases and sales reported on Form 4 by 2 sellers. None of the 22 insider sales was flagged as made under a Rule 10b5-1 plan. Members of Congress have disclosed trades in ASX, none in the last year; the latest on record is a sale by Sheri Biggs dated 2025-03-18. 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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