ASE Technology Holding Co., Ltd.
ASE Technology Holding Co., Ltd. (ASX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ASX · as of Sep 30, 2024
Ownership Breakdown
285
Institutional Holders
$1.55B
Total Inst. Value
▼ $289.23M vs Q2
2.19B
Shares Outstanding
freeFloat 74.26%
158.73M
13F Shares Held
▼ 2.56M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ASX largest shareholders · institutional ownership
Q3 2024 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
LAZARD ASSET MANAGEMENT LLC semiconductors & related devices | 18.46M | 42.79% | 42.79% | $180.21B | Nov 14, 2024 | ▼ 2.66M |
FISHER ASSET MANAGEMENT, LLC semiconductors & related devices | 15.17M | 35.15% | 35.15% | $148.04B | Nov 12, 2024 | ▲ 1.48M |
BLACKROCK, INC. semiconductors & related devices | 13.46M | 31.20% | 31.20% | $131.40B | Nov 13, 2024 | NEW |
UBS GROUP AG semiconductors & related devices | 9.40M | 21.78% | 21.78% | $91.73B | Nov 14, 2024 | ▲ 1.72M |
ACADIAN ASSET MANAGEMENT LLC semiconductors & related devices | 8.21M | 19.02% | 19.02% | $80.09B | Nov 12, 2024 | ▼ 1.44M |
BANK OF AMERICA CORP /DE/ semiconductors & related devices | 7.96M | 18.45% | 18.45% | $77.70B | Nov 14, 2024 | ▲ 1.22M |
GOLDMAN SACHS GROUP INC semiconductors & related devices | 6.66M | 15.43% | 15.43% | $64.99B | Nov 14, 2024 | ▲ 1.68M |
RAFFERTY ASSET MANAGEMENT, LLC semiconductors & related devices | 5.68M | 13.16% | 13.16% | $55.44B | Nov 13, 2024 | ▲ 473.1K |
MORGAN STANLEY semiconductors & related devices | 5.25M | 12.17% | 12.17% | $51.26B | May 14, 2025 | ▼ 174.0K |
CULLEN CAPITAL MANAGEMENT, LLC semiconductors & related devices | 4.41M | 10.22% | 10.22% | $43.03B | Nov 12, 2024 | ▼ 197.4K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2024 vs prior quarter
Q3 2024
22
Increased
+15.54M shares6
New Positions
first time holders22
Decreased
−6.35M shares0
Sold Out
fully exitedNet shares change (top 50)
+9.19M
+15.54M / −6.35M
Net new holders
+6
6 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ASX insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
2
Buy transactions
31
Sell transactions
0.06
Buy/Sell ratio
$5M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Uang Du-Tsuen Chief Administration Officer | Jun 1, 2026 | Sale | 5,000 | $607.00 | $3.04M | 783.0K | Form 4 ↗ |
Uang Du-Tsuen Chief Administration Officer | Jun 3, 2026 | Sale | 5,000 | $617.00 | $3.08M | 778.0K | Form 4 ↗ |
Chen Jeffrey director | May 22, 2026 | Sale | 9,000 | $538.00 | $4.84M | 20.0K | Form 4 ↗ |
Chen Jeffrey director | May 25, 2026 | Sale | 9,000 | $590.00 | $5.31M | 11.0K | Form 4 ↗ |
Chen Jeffrey director | May 26, 2026 | Sale | 9,000 | $630.00 | $5.67M | 2.0K | Form 4 ↗ |
Chen Jeffrey director | May 27, 2026 | Sale | 2,000 | $653.00 | $1.31M | 0 | Form 4 ↗ |
Chen Jeffrey director | May 19, 2026 | Sale | 9,000 | $483.00 | $4.35M | 47.0K | Form 4 ↗ |
Chen Jeffrey director | May 20, 2026 | Sale | 9,000 | $477.00 | $4.29M | 38.0K | Form 4 ↗ |
Chen Jeffrey director | May 21, 2026 | Sale | 9,000 | $505.00 | $4.54M | 29.0K | Form 4 ↗ |
Chen Jeffrey director | May 14, 2026 | Sale | 9,000 | $560.00 | $5.04M | 74.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
ASE Technology Holding Co., Ltd. (ASX) is primarily owned by institutional investors, who hold approximately 7.2% of total shares outstanding. Company insiders own approximately 25.74%, while retail and public investors account for the remaining 67.02%.
The largest institutional shareholder of ASE Technology Holding Co., Ltd. is LAZARD ASSET MANAGEMENT LLC, holding approximately 18.46 million shares — equal to 42.79% of outstanding shares — as of September 30, 2024.
A total of 285 institutional investors currently hold ASX stock, with a combined institutional value of approximately $1.55 billion as of the most recent 13F filing period.
Frequently asked questions
ASX ownershipASE Technology Holding Co., Ltd. (ASX) is primarily owned by institutional investors, who hold approximately 7.2% of shares. The largest shareholder is LAZARD ASSET MANAGEMENT LLC with a 42.79% stake. Company insiders hold 25.74%. Data sourced from SEC Form 13F as of September 30, 2024.