ASE Technology (ASX) director discloses large share and option stakes

Rhea-AI Filing Summary

ASE Technology Holding Co., Ltd. director Chang Chien Shen filed an initial Form 3 showing his beneficial ownership. He holds stock options to acquire 3,000,000 Ordinary Shares at an exercise price of 41.1000 (New Taiwan dollars) expiring on November 22, 2028, and another 3,000,000 options at 99.7000 expiring on August 17, 2033. The earlier grant is fully vested and exercisable, while the 2023 grant vests in seven semi-annual installments through August 18, 2028. He also holds 1,747,647 Ordinary Shares directly, plus indirect holdings of 684,327,886 shares through ASE Enterprises Limited and 265,024,820 shares through Value Tower Ltd.

Insider Trade Summary

5 transactions reported

Mixed 5 txns

Insider Chang Chien Shen

Role Director

Type	Security	Shares	Price	Value
holding	Stock Option (Right to Buy)	--	--	--
holding	Stock Option (Right to Buy)	--	--	--
holding	Ordinary Shares	--	--	--
holding	Ordinary Shares	--	--	--
holding	Ordinary Shares	--	--	--

Holdings After Transaction: Stock Option (Right to Buy) — 3,000,000 shares (Direct); Ordinary Shares — 1,747,647 shares (Direct); Ordinary Shares — 684,327,886 shares (Indirect, By ASE Enterprises Limited)

Footnotes (1)

1. Reflects stock options to purchase Ordinary Shares. These stock options were granted on November 23, 2018 and are fully vested and exercisable. The option exercise price reflects New Taiwan dollars. Reflects stock options to purchase Ordinary Shares. These stock options were granted on August 18, 2023 and vest in seven semi-annual installments. 40% of the options vested on August 18, 2025, 10% of the options vested on February 18, 2026, and the remaining installments will vest at 10% each on August 18 2026, February 18, 2027, August 18, 2027, February 18, 2028 and August 18, 2028.

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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

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Chang Chien Shen

(Last) (First) (Middle)

ROOM 1901, NO. 333

SECTION 1 KEELUNG RD.

(Street)

TAIPEI TAIWAN 110

(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)

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

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	1,747,647	D
Ordinary Shares	684,327,886	I	By ASE Enterprises Limited
Ordinary Shares	265,024,820	I	By Value Tower Ltd.

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	3,000,000	$41.1(2)	D
Stock Option (Right to Buy)	(3)	08/17/2033	Ordinary Shares	3,000,000	$99.7(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.

3. Reflects stock options to purchase Ordinary Shares. These stock options were granted on August 18, 2023 and vest in seven semi-annual installments. 40% of the options vested on August 18, 2025, 10% of the options vested on February 18, 2026, and the remaining installments will vest at 10% each on August 18 2026, February 18, 2027, August 18, 2027, February 18, 2028 and August 18, 2028.

Remarks:

Exhibit List - Exhibit 24.1 - Power of Attorney

	/s/ Georgette Yeh, attorney-in-fact for Chien Shen Chang	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 Chang Chien Shen’s Form 3 for ASE Technology (ASX) report?

The Form 3 reports Chang Chien Shen’s existing beneficial ownership in ASE Technology. It lists his direct Ordinary Share holdings, large indirect positions through ASE Enterprises Limited and Value Tower Ltd., and multiple stock option grants with specified exercise prices and expiration dates.

How many ASE Technology (ASX) Ordinary Shares does Chang Chien Shen hold directly and indirectly?

He holds 1,747,647 Ordinary Shares directly. Indirectly, he is reported with 684,327,886 Ordinary Shares through ASE Enterprises Limited and 265,024,820 Ordinary Shares through Value Tower Ltd., reflecting substantial beneficial ownership across affiliated entities.

What stock options are reported for Chang Chien Shen in ASE Technology (ASX)?

He is reported with options over 3,000,000 Ordinary Shares at an exercise price of 41.1000 and another 3,000,000 at 99.7000, both in New Taiwan dollars, with expirations on November 22, 2028 and August 17, 2033, respectively, subject to the noted vesting schedules.

Are Chang Chien Shen’s ASE Technology (ASX) options fully vested?

The options granted on November 23, 2018 are fully vested and exercisable. The options granted on August 18, 2023 vest in seven semi-annual installments, with 50% already vested by February 18, 2026 and the remaining vesting through August 18, 2028.

Does this ASE Technology (ASX) Form 3 show recent insider buying or selling?

No new purchases or sales are indicated. The entry is characterized as an initial statement of beneficial ownership, listing existing Ordinary Share holdings and stock options, with transaction summaries showing no buys, sells, gifts, or exercises reported in this filing.