Amkor Technology (AMKR) files Form 3/A amendment for Cherie Buntyn

Rhea-AI Filing Summary

Amkor Technology, Inc. executive Cherie Buntyn filed an amended Form 3 that does not report any new stock transactions or holdings changes. The amendment is being filed solely to add her power of attorney as an exhibit, and the original beneficial ownership disclosure otherwise remains unchanged.

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^*

Buntyn Cherie

(Last) (First) (Middle)

2045 E INNOVATION CIRCLE

(Street)

TEMPE AZ 85284

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
02/02/2026

3. Issuer Name and Ticker or Trading Symbol
AMKOR TECHNOLOGY, INC. [ AMKR ]

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

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

5. If Amendment, Date of Original Filed (Month/Day/Year)
02/02/2026

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

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

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)
Common Stock	0	D(1)

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

Explanation of Responses:

1. This amendment is being filed solely to add the Reporting Person's power of attorney as an exhibit to the original filing, which otherwise remains unchanged.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Mark N. Rogers, Attorney-in-Fact for Cherie Buntyn	03/16/2026
	** 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.

FAQ

What does Amkor Technology (AMKR) disclose in Cherie Buntyn's Form 3/A?

The Form 3/A reports no new transactions or ownership changes. It states the amendment is filed solely to add Cherie Buntyn’s power of attorney as an exhibit, while the original Form 3 disclosure otherwise remains unchanged.

Did Cherie Buntyn buy or sell Amkor Technology (AMKR) shares in this Form 3/A?

No new purchases or sales are reported in this Form 3/A. The insider data show a holding entry with zero shares following the transaction and a footnote confirming the amendment is only to add a power of attorney exhibit.

Why was the Amkor Technology (AMKR) Form 3 for Cherie Buntyn amended?

The Form 3 was amended solely to attach a power of attorney. The footnote explains the amendment adds the reporting person’s power of attorney as an exhibit, and states that the original filing otherwise remains unchanged.

What insider role does Cherie Buntyn hold at Amkor Technology (AMKR)?

Cherie Buntyn is identified as Amkor Technology’s Chief Accounting Officer. The insider filing classifies her as an officer, listing the specific title “Chief Accounting Officer” and confirming she is not reported as a director or ten percent owner.

Does the Cherie Buntyn Form 3/A show any derivative securities at Amkor Technology (AMKR)?

The filing does not list any derivative securities positions. The derivative summary section is empty, and the only disclosed security is common stock, with no options, warrants, or other derivative instruments reported in this amendment.