ASE Technology director reports share sales

ASE Technology Holding Co., Ltd. director Jeffrey Chen reported a series of indirect open-market sales of Ordinary Shares held by his spouse.

Rhea-AI Filing Summary

ASE Technology Holding Co., Ltd. director Jeffrey Chen reported a series of indirect open-market sales of Ordinary Shares held by his spouse. Over three days, entities associated with him sold 27,000 shares at prices in New Taiwan Dollars, including 9,000 shares at NT$483, 9,000 at NT$477, and 9,000 at NT$505 per share. Following the last sale, his spouse’s indirect holdings stood at 29,000 Ordinary Shares, while a separate entry shows Chen with 2,383,000 Ordinary Shares held directly. Chen disclaims beneficial ownership of the reported securities except to the extent of any pecuniary interest.

Insider Trade Summary

Net Seller: 27,000 shares

Net Sell 4 txns

Insider Chen Jeffrey

Role Director

Sold 27,000 shs ($13.19M)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	9,000	$505.00	$4.54M
Sale	Ordinary Shares	9,000	$477.00	$4.29M
Sale	Ordinary Shares	9,000	$483.00	$4.35M
holding	Ordinary Shares	--	--	--

Holdings After Transaction: Ordinary Shares — 29,000 shares (Indirect, By Spouse); Ordinary Shares — 2,383,000 shares (Direct)

Footnotes (2)

1. F1. New Taiwan Dollars.
2. F2. The Reporting Person disclaims beneficial ownership over the securities reported except to the extent of his pecuniary interest therein, if any.

Key Figures

Shares sold May 21: 9,000 shares at NT$505 Shares sold May 20: 9,000 shares at NT$477 Shares sold May 19: 9,000 shares at NT$483 +3 more

6 metrics

Shares sold May 21 9,000 shares at NT$505 Indirect open-market sale by spouse

Shares sold May 20 9,000 shares at NT$477 Indirect open-market sale by spouse

Shares sold May 19 9,000 shares at NT$483 Indirect open-market sale by spouse

Total shares sold 27,000 shares Net insider selling across three days

Indirect holdings after sales 29,000 shares Ordinary Shares held by spouse after May 21

Direct holdings snapshot 2,383,000 shares Ordinary Shares held directly as of May 19

Key Terms

open-market sale, Ordinary Shares, beneficial ownership, pecuniary interest, +1 more

5 terms

open-market sale financial

"transaction_action: "open-market sale" for each non-derivative transaction"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Ordinary Shares financial

"security_title: "Ordinary Shares" in each transaction entry"

Ordinary shares are a type of ownership stake in a company, giving shareholders a right to participate in the company’s profits and decision-making through voting. They are similar to owning a piece of a business, and their value can rise or fall based on the company's performance. Investors buy ordinary shares to potentially earn dividends and benefit from the company's growth over time.

beneficial ownership financial

"The Reporting Person disclaims beneficial ownership over the securities reported"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

pecuniary interest financial

"except to the extent of his pecuniary interest therein, if any"

indirect financial

"ownership_type: "indirect" and nature_of_ownership: "By Spouse""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did ASX director Jeffrey Chen report?

Jeffrey Chen reported three indirect open-market sales totaling 27,000 Ordinary Shares. His spouse sold 9,000 shares on each of three days at prices in New Taiwan Dollars, and Chen reported these as indirect transactions associated with him.

At what prices were the ASX Ordinary Shares sold in this Form 4?

The reported indirect sales occurred at NT$483, NT$477, and NT$505 per share. Each transaction involved 9,000 Ordinary Shares held by Chen’s spouse, reflecting open-market sales in New Taiwan Dollars over three consecutive trading days.

How many ASE Technology (ASX) shares did Jeffrey Chen’s spouse hold after the sales?

After the final reported sale, Chen’s spouse held 29,000 Ordinary Shares indirectly. This indirect position reflects the remaining shares attributed to Chen through spousal ownership, separate from his substantially larger directly held stake.

What are Jeffrey Chen’s direct ASE Technology (ASX) share holdings in this filing?

The filing shows Chen directly holding 2,383,000 Ordinary Shares as of May 19. This direct position is separate from the smaller indirect stake held by his spouse and provides context for the scale of the reported sales.

Does Jeffrey Chen claim full beneficial ownership of the ASX shares reported?

No. Chen disclaims beneficial ownership except for any pecuniary interest. The filing states he does not fully claim beneficial ownership over the securities reported, which include shares held indirectly by his spouse.

Are the ASE Technology (ASX) sale prices reported in U.S. dollars?

No. The reported sale prices are in New Taiwan Dollars. A footnote clarifies that the share prices for the 27,000 Ordinary Shares sold by Chen’s spouse are denominated in New Taiwan Dollars, not in U.S. currency.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/21/2026 - 06:04 AM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Chen Jeffrey

(Last) (First) (Middle)

ROOM 1901, NO. 333

SECTION 1 KEELUNG RD.

(Street)

TAIPEI TAIWAN 110

(City) (State) (Zip)

TAIWAN

(Country)

2. Issuer Name and Ticker or Trading Symbol
ASE Technology Holding Co., Ltd. [ ASX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/19/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares	05/19/2026		S		9,000	D	$483(1)	47,000	I	By Spouse(2)
Ordinary Shares	05/20/2026		S		9,000	D	$477(1)	38,000	I	By Spouse(2)
Ordinary Shares	05/21/2026		S		9,000	D	$505(1)	29,000	I	By Spouse(2)
Ordinary Shares								2,383,000	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. New Taiwan Dollars.

2. The Reporting Person disclaims beneficial ownership over the securities reported except to the extent of his pecuniary interest therein, if any.

	/s/ Georgette Yeh, attorney-in-fact for Jeffrey Chen	05/21/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)