ASE Technology (NYSE: ASX) GM details major share and option stake

Rhea-AI Filing Summary

ASE Technology Holding Co., Ltd. executive Chen Tien-Szu, GM of ASE Inc. Chung-Li Branch, has reported an initial statement of ownership in the company. He directly holds 2,781,821 Ordinary Shares and stock options covering 300,000 Ordinary Shares at an exercise price of 41.1000 New Taiwan dollars per share. These options were granted on November 23, 2018, are fully vested and exercisable, and expire on November 22, 2028.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

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1. Name and Address of Reporting Person^*

Chen Tien-Szu

(Last) (First) (Middle)

550, CHUNG-HWA ROAD, SECTION 1

(Street)

TAOYUAN CITY TAIWAN 32016

(City) (State) (Zip)

TAIWAN, PROVINCE OF CHINA

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

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

3a. Foreign Trading Symbol

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	GM, ASE Inc. Chung-Li Branch

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

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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary Shares	2,781,821	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	(1)	11/22/2028	Ordinary Shares	300,000	$41.1(2)	D

Explanation of Responses:

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

2. The option exercise price reflects New Taiwan dollars.

Remarks:

Exhibit List - Exhibit 24.1 - Power of Attorney

	/s/ Georgette Yeh, attorney-in-fact for Tien-Szu Chen	03/18/2026
	** 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 5 (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 3: SEC 1473 (03-26)

FAQ

What does the Chen Tien-Szu Form 3 for ASE Technology (ASX) show?

The Form 3 shows Chen Tien-Szu’s initial ownership in ASE Technology. He directly holds 2,781,821 Ordinary Shares plus options for 300,000 shares, providing a clear view of his existing equity stake as an executive.

How many ASE Technology (ASX) shares does Chen Tien-Szu directly own?

Chen Tien-Szu directly owns 2,781,821 Ordinary Shares of ASE Technology. This figure represents his reported direct equity position as of the Form 3 and helps investors understand his alignment with common shareholders through share ownership.

What stock options does Chen Tien-Szu hold in ASE Technology (ASX)?

He holds stock options covering 300,000 Ordinary Shares with an exercise price of 41.1000 New Taiwan dollars. These options were granted on November 23, 2018, are fully vested and exercisable, and give additional potential upside exposure to ASE Technology’s equity.

When do Chen Tien-Szu’s ASE Technology (ASX) stock options expire?

Chen Tien-Szu’s stock options in ASE Technology expire on November 22, 2028. Because they are already fully vested and exercisable, he can choose to exercise them any time before that expiration date, subject to applicable company and regulatory rules.

What is Chen Tien-Szu’s role at ASE Technology (ASX)?

Chen Tien-Szu serves as GM of ASE Inc. Chung-Li Branch, a role reported alongside his ownership details. Knowing his position and stake size helps investors gauge how closely his incentives may be aligned with ASE Technology shareholders.