Megan Faust - 20 Feb 2026 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Role
CFO
Signature
/s/ Mark N. Rogers, Attorney-in-Fact for Megan Faust
Issuer symbol
AMKR
Transactions as of
20 Feb 2026
Net transactions value
-$717,182
Form type
4
Filing time
24 Feb 2026, 16:10:11 UTC
Previous filing
20 Feb 2026
Next filing
26 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Faust Megan CFO 2045 E INNOVATION CIRCLE, TEMPE /s/ Mark N. Rogers, Attorney-in-Fact for Megan Faust 24 Feb 2026 0001684564

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMKR Common Stock Options Exercise $0 +16,805 +16% $0.000000 124,029 20 Feb 2026 Direct
transaction AMKR Common Stock Tax liability $345,216 -7,201 -5.8% $47.94 116,828 20 Feb 2026 Direct F1
transaction AMKR Common Stock Options Exercise $0 +18,106 +15% $0.000000 134,934 20 Feb 2026 Direct
transaction AMKR Common Stock Tax liability $371,966 -7,759 -5.8% $47.94 127,175 20 Feb 2026 Direct F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction AMKR Restricted Stock Units Options Exercise $0 -16,805 -50% $0.000000 16,810 20 Feb 2026 Common Stock 16,805 $0.000000 Direct F3
transaction AMKR Restricted Stock Units Options Exercise $0 -18,106 -33% $0.000000 36,218 20 Feb 2026 Common Stock 18,106 $0.000000 Direct F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The transaction represents shares withheld by Amkor Technology, Inc. (the "Issuer") in connection with the vesting of certain restricted stock units ("RSUs") granted to the Reporting Person on February 20, 2024 (the "2024 Grant Date") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.
F2 The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on February 20, 2025 (the "2025 Grant Date") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.
F3 Represents shares of the Issuer's common stock underlying time-vested RSUs on the 2024 Grant Date pursuant to the Issuer's Equity Incentive Plan. The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the 2024 Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the 2024 Grant Date.
F4 Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on the 2025 Grant Date pursuant to the Issuer's Equity Incentive Plan. The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the 2025 Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the 2025 Grant Date.