Amkor director exercises options, sells 5,000 shares

AMKOR TECHNOLOGY, INC. director Douglas A. Alexander reported an option exercise-and-sale on Common Stock.

Rhea-AI Filing Summary

AMKOR TECHNOLOGY, INC. director Douglas A. Alexander reported an option exercise-and-sale on Common Stock. On May 5, 2026, he exercised options for 5,000 shares at strike prices of $8.51 and $9.45, then sold 5,000 shares in open-market transactions at $76.58 per share. Following these transactions, he directly owned 29,109 common shares.

Insider Trade Summary

Exercise and Sale: 5,000 shares ($336K approx. pre-tax spread)

Exercise and Sale 6 txns

Insider ALEXANDER DOUGLAS A

Role Director

Sold 5,000 shs ($383K)

Approx. gross sale proceeds $383K

Approx. exercise cost $47K

Approx. pre-tax spread $336K

Type	Security	Shares	Price	Value
Exercise	Director Stock Option (Right-to-Buy)	4,657	$0.00	$0.00
Exercise	Director Stock Option (Right-to-Buy)	343	$0.00	$0.00
Exercise	Common Stock	4,657	$9.45	$44K
Sale	Common Stock	4,657	$76.58	$357K
Exercise	Common Stock	343	$8.51	$3K
Sale	Common Stock	343	$76.58	$26K

Holdings After Transaction: Director Stock Option (Right-to-Buy) — 19,657 contracts (Direct); Common Stock — 29,109 shares (Direct)

Footnotes (2)

1. F1. This stock option to acquire 4,657 shares of Amkor Technology, Inc. ("the Issuer") Common Stock was granted on February 6, 2018, vested in full on May 1, 2018.
2. F2. This stock option to acquire 20,000 shares of the Issuer's Common Stock was granted on May 1, 2018, vested in full on May 1, 2019.

Key Figures

Shares sold: 5,000 shares Sale price per share: $76.58 Options exercised: 5,000 shares +4 more

7 metrics

Shares sold 5,000 shares Common Stock sold in open-market transactions on May 5, 2026

Sale price per share $76.58 Price for 5,000 Common Stock shares sold May 5, 2026

Options exercised 5,000 shares Common Stock acquired via option exercises on May 5, 2026

Strike price (option 1) $8.51 per share 343-share Director Stock Option exercise price

Strike price (option 2) $9.45 per share 4,657-share Director Stock Option exercise price

Post-transaction holdings 29,109 shares Common Stock directly owned after May 5, 2026 transactions

Net buy/sell direction net-sell of 5,000 shares Aggregate of reported buy/sell activity in transaction summary

Key Terms

open-market sale, derivative exercise/conversion, Director Stock Option (Right-to-Buy), transaction_code "M"

4 terms

open-market sale financial

"transaction_action is described as "open-market sale" for Common Stock"

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.

derivative exercise/conversion financial

"transaction_action is listed as "derivative exercise/conversion" for option trades"

Director Stock Option (Right-to-Buy) financial

"security_title includes "Director Stock Option (Right-to-Buy)" for derivative entries"

transaction_code "M" financial

"transaction_code "M" is used for option exercises in the filing data"

FAQ

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

What insider transaction did AMKOR (AMKR) director Douglas A. Alexander report?

Douglas A. Alexander reported exercising options for 5,000 AMKOR shares and selling 5,000 shares in open-market trades. The transactions involved common stock and were reported as occurring on May 5, 2026, according to the Form 4 insider filing data.

At what prices did the AMKOR (AMKR) director sell his shares?

The AMKOR director reported selling 5,000 common shares at an open-market price of $76.58 per share. These sales followed option exercises at significantly lower strike prices, as disclosed in the Form 4 insider transaction records for May 5, 2026.

What were the option exercise (strike) prices in the AMKOR (AMKR) Form 4 filing?

The filing shows options exercised for 343 shares at a strike price of $8.51 and 4,657 shares at a strike price of $9.45. Both option exercises converted into common stock on May 5, 2026, before the related open-market sales occurred.

How many AMKOR (AMKR) shares does the director hold after these transactions?

After exercising options and selling shares, the director directly holds 29,109 AMKOR common shares. This figure reflects his position immediately following the May 5, 2026 transactions, as reported in the total shares following transaction field in the Form 4 data.

What pattern do the AMKOR (AMKR) insider transactions represent?

The Form 4 shows an exercise-and-sell pattern: stock options for 5,000 shares were exercised, then the same 5,000 shares were sold. This converts option awards into cash while leaving the director with a remaining direct common stock position of 29,109 shares.

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

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Accepted by SEC EDGAR 05/07/2026 - 04:34 PM 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^*

ALEXANDER DOUGLAS A

(Last) (First) (Middle)

2045 EAST INNOVATION CIRCLE

(Street)

TEMPE ARIZONA 85284

(City) (State) (Zip)

UNITED STATES

(Country)

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

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)
05/05/2026

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
Common Stock	05/05/2026		M		4,657	A	$9.45	33,766	D
Common Stock	05/05/2026		S		4,657	D	$76.58	29,109	D
Common Stock	05/05/2026		M		343	A	$8.51	29,452	D
Common Stock	05/05/2026		S		343	D	$76.58	29,109	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
Director Stock Option (Right-to-Buy)	$9.45	05/05/2026		M			4,657	05/01/2018(1)	02/06/2028	Common Stock	4,657	$0	0	D
Director Stock Option (Right-to-Buy)	$8.51	05/05/2026		M			343	05/01/2019(2)	05/01/2028	Common Stock	343	$0	19,657	D

Explanation of Responses:

1. This stock option to acquire 4,657 shares of Amkor Technology, Inc. ("the Issuer") Common Stock was granted on February 6, 2018, vested in full on May 1, 2018.

2. This stock option to acquire 20,000 shares of the Issuer's Common Stock was granted on May 1, 2018, vested in full on May 1, 2019.

Remarks:

	/s/ Mark N. Rogers, Attorney-in-Fact for Douglas A. Alexander	05/07/2026
	** 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)