DAVID N. WATSON - 25 Feb 2026 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Role
Director
Signature
/s/ Mark N. Rogers, Attorney-in-Fact for David N. Watson
Issuer symbol
AMKR
Transactions as of
25 Feb 2026
Net transactions value
+$113,200
Form type
4
Filing time
26 Feb 2026, 16:09:26 UTC
Previous filing
29 Dec 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
WATSON DAVID N Director 2045 EAST INNOVATION CIRCLE, TEMPE /s/ Mark N. Rogers, Attorney-in-Fact for David N. Watson 26 Feb 2026 0001276908

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMKR Common Stock Options Exercise $113,200 +20,000 +19% $5.66 122,980 25 Feb 2026 Direct
transaction AMKR Common Stock Tax liability $0 -2,223 -1.8% $0.000000 120,757 25 Feb 2026 Direct F1

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 Director Stock Option (Right-to-Buy) Options Exercise $0 -20,000 -100% $0.000000 0 25 Feb 2026 Common Stock 20,000 $5.66 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Exempt purchase under Section 16b-3. Transaction executed as net exercise executed with Amkor Technology, Inc. (the "Issuer"), in which no shares were purchased or sold in the open market.
F2 This stock option to acquire 20,000 shares of the Issuer's Common Stock was granted on May 4, 2016 and vested in full on May 2, 2017.