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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1047127	Amkor Technology Inc.	AMKR	Semiconductors & Related Devices (3674)	231722724

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1581432	Charles John Stone	1514 Rockrose Way Chandler AZ 85248	Executive Vice President	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2020-12-03	28,125	$9.86	53,141	No	4	M	Direct
Common Stock	Disposition	2020-12-03	28,125	$15.25	25,016	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (Right-to-Buy)	Disposition	2020-12-03	28,125	$0.00	28,125	$9.86

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
28,125	2018-02-27	2027-02-27	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	2,000	Indirect	Held in Trust

Footnotes

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 26, 2020
The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from 15.25 to 15.26.
This stock option was granted on February 27, 2017 and vests over four years as follows: 25% of the shares vest on the first anniversary of the grant date and 1/16 of the option vests each quarter thereafter, such that 100% of the option will be vested on the fourth anniversary of the grant date.