ASE Technology (NYSE: ASX) officer acquires 365K shares via options

Rhea-AI Filing Summary

ASE Technology Holding Co., Ltd. (ASX) reported that officer Chung Chih-Hsiao, GM, ASE Japan & Wuxi Tongzhi, exercised employee stock options and received Ordinary Shares. On 2026-08-12 and 2026-08-13, he exercised options for a total of 365,000 Ordinary Shares (292,000 plus 73,000) at an exercise price of 41.1000 per share, with the price reflecting New Taiwan dollars. The options were originally granted on November 23, 2018 and were fully vested and exercisable at the time of exercise. The Form 4 does not report any market sales in connection with these exercises, and the Rule 10b5-1 checkbox is not marked.

Insider Trade Summary

Net Buyer: 365,000 shares

Net Buy 4 txns

Insider Chung Chih-Hsiao

Role GM, ASE Japan & Wuxi Tongzhi

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy) F1, F2	73,000	$0.00	$0.00
Exercise	Ordinary Shares F1	73,000	$41.10	$3.00M
Exercise	Stock Option (Right to Buy) F1, F2	292,000	$0.00	$0.00
Exercise	Ordinary Shares F1	292,000	$41.10	$12.00M

Holdings After Transaction: Stock Option (Right to Buy) — 0 shares (Direct); Ordinary Shares — 395,000 shares (Direct)

Footnotes (2)

1. F1. The option exercise price reflects New Taiwan dollars.
2. F2. Reflects stock options to purchase Ordinary Shares. These stock options were granted on November 23, 2018 and are fully vested and exercisable.

Key Figures

Options Exercised (2026-08-12): 292,000 shares Options Exercised (2026-08-13): 73,000 shares Total Shares Acquired via Exercise: 365,000 shares +4 more

7 metrics

Options Exercised (2026-08-12) 292,000 shares Stock Option (Right to Buy) converted into Ordinary Shares on 2026-08-12

Options Exercised (2026-08-13) 73,000 shares Stock Option (Right to Buy) converted into Ordinary Shares on 2026-08-13

Total Shares Acquired via Exercise 365,000 shares Sum of Ordinary Shares received from option exercises on 2026-08-12 and 2026-08-13

Option Exercise Price 41.1000 Per-share exercise price for stock options, reflecting New Taiwan dollars

Option Expiration Date 2028-11-22 Expiration date of the exercised Stock Option (Right to Buy)

Option Grant Date November 23, 2018 Grant date of stock options that were fully vested and exercisable

Exercise Events Count 2 exercises Two derivative exercise/conversion transactions (code M) reported

Key Terms

Stock Option (Right to Buy), Ordinary Shares, Rule 10b5-1, fully vested and exercisable

4 terms

Stock Option (Right to Buy) financial

"security_title: Stock Option (Right to Buy)"

Ordinary Shares financial

"underlying_security_title: Ordinary Shares"

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.

Rule 10b5-1 regulatory

"Rule 10b5-1 checkbox is not marked"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

fully vested and exercisable financial

"These stock options were granted... and are fully vested and exercisable"

FAQ

What did ASX executive Chung Chih-Hsiao report in this Form 4 for ASE Technology (ASX)?

Chung Chih-Hsiao reported exercising stock options and receiving 365,000 Ordinary Shares of ASE Technology. The exercises occurred on 2026-08-12 and 2026-08-13 at an exercise price of 41.1000 per share in New Taiwan dollars.

How many ASE Technology (ASX) shares were acquired through option exercises in this filing?

The filing shows the acquisition of 365,000 Ordinary Shares via option exercises. This consists of 292,000 shares exercised on 2026-08-12 and 73,000 shares exercised on 2026-08-13, all at an exercise price of 41.1000 per share.

What was the exercise price for the ASE Technology (ASX) options in Chung Chih-Hsiao’s Form 4?

The stock options were exercised at 41.1000 per share, and the filing states this price reflects New Taiwan dollars. This per-share exercise price applied to both the 292,000-share and 73,000-share option exercises reported.

When were the ASE Technology (ASX) stock options originally granted in this Form 4?

The options exercised in this Form 4 were granted on November 23, 2018. A footnote explains that these options to purchase Ordinary Shares were fully vested and exercisable by the time of the 2026 exercises.

Were Chung Chih-Hsiao’s ASE Technology (ASX) transactions under a Rule 10b5-1 trading plan?

The Form 4’s Rule 10b5-1 checkbox is not marked, so the transactions are not affirmed as pursuant to a Rule 10b5-1 trading plan. The filing does not indicate any separate pre-arranged trading arrangement in the footnotes provided.

Did the ASE Technology (ASX) Form 4 report any sales of shares by Chung Chih-Hsiao?

The Form 4 reports option exercises and share acquisitions but no market sales of ASE Technology Ordinary Shares. All non-derivative transactions listed are acquisitions resulting from the exercise or conversion of derivative securities (stock options).

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/19/2026 - 06:17 AM Accepted by SEC EDGAR 08/19/2026 - 06:16 AM 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^*

Chung Chih-Hsiao

(Last) (First) (Middle)

1863, OOAZAIRYUDA

TAKAHATA-MACHI

(Street)

HIGASHIOKITAMA-GUN, YAMAGATA 992-0324

(City) (State) (Zip)

JAPAN

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	GM, ASE Japan & Wuxi Tongzhi

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/12/2026

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	08/12/2026		M		292,000	A	$41.1(1)	322,000	D
Ordinary Shares	08/13/2026		M		73,000	A	$41.1(1)	395,000	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
Stock Option (Right to Buy)	$41.1(1)	08/12/2026		M			292,000	(2)	11/22/2028	Ordinary Shares	292,000	$0	73,000	D
Stock Option (Right to Buy)	$41.1(1)	08/13/2026		M			73,000	(2)	11/22/2028	Ordinary Shares	73,000	$0	0	D

Explanation of Responses:

1. The option exercise price reflects New Taiwan dollars.

2. Reflects stock options to purchase Ordinary Shares. These stock options were granted on November 23, 2018 and are fully vested and exercisable.

	/s/ Georgette Yeh, attorney-in-fact for Chih-Hsiao Chung	08/19/2026
	** 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)