STOCK TITAN

Amkor (AMKR) director sells 20,000 shares after exercising options

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Amkor Technology director Carolin Roger Anthony reported an exercise-and-sell transaction in company stock. On May 5, 2026, he exercised options to acquire 20,000 shares of common stock at $11.71 per share, then sold 20,000 shares in open-market trades at a weighted average price of $76.24, with individual sale prices ranging from $76.11 to $76.48. After these transactions, he directly owned 94,409 shares of Amkor common stock.

Positive

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Negative

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Insider Carolin Roger Anthony
Role null
Sold 20,000 shs ($1.52M)
Type Security Shares Price Value
Exercise Director Stock Option (Right to Buy) 20,000 $0.00 --
Exercise Common Stock 20,000 $11.71 $234K
Sale Common Stock 20,000 $76.24 $1.52M
Holdings After Transaction: Director Stock Option (Right to Buy) — 0 shares (Direct, null); Common Stock — 114,409 shares (Direct, null)
Footnotes (1)
  1. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $76.11 to $76.48. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the "Issuer"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4. This stock option to acquire 20,000 shares of the Issuer's Common Stock was granted on May 2, 2017, vested in full on May 1, 2018.
Shares sold 20,000 shares Open-market sale of common stock on May 5, 2026
Sale price $76.24 per share Weighted average sale price; trades from $76.11 to $76.48
Option exercise price $11.71 per share Director stock option to buy 20,000 shares
Shares acquired via exercise 20,000 shares Common stock received from option exercise on May 5, 2026
Shares held after transactions 94,409 shares Director’s direct common stock holdings following May 5, 2026 trades
Option grant date May 2, 2017 Director stock option for 20,000 shares
Option vesting date May 1, 2018 Option vested in full before later exercise
Option expiration date May 2, 2027 Expiration date of director stock option
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
Director Stock Option (Right to Buy) financial
"Director Stock Option (Right to Buy) listed as a derivative security."
open-market sale financial
"transaction_action is described as an open-market sale of 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 security financial
"transaction_code description notes an exercise or conversion of derivative security."
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
SEC Form 4
FORM 4UNITED 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*
Carolin Roger Anthony

(Last)(First)(Middle)
7 GREAT VALLEY PARKWAY,
SUITE 190

(Street)
MALVERN PENNSYLVANIA 19355

(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)
XDirector10% 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)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/05/2026M20,000A$11.71114,409D
Common Stock05/05/2026S20,000D$76.24(1)94,409D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Director Stock Option (Right to Buy)$11.7105/05/2026M20,00005/01/2018(2)05/02/2027Common Stock20,000$00D
Explanation of Responses:
1. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $76.11 to $76.48. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the "Issuer"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.
2. This stock option to acquire 20,000 shares of the Issuer's Common Stock was granted on May 2, 2017, vested in full on May 1, 2018.
Remarks:
/s/ Mark N. Rogers, Attorney-in-Fact for Roger A. Carolin05/07/2026
** Signature of Reporting PersonDate
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)

FAQ

What insider transactions did AMKR director Carolin Roger Anthony report?

He reported exercising options for 20,000 Amkor shares at $11.71 each and selling 20,000 common shares in the open market. The sale used a weighted average price of $76.24, with individual trades between $76.11 and $76.48.

How many AMKR shares did the director sell and at what price?

He sold 20,000 Amkor common shares in open-market transactions at a weighted average price of $76.24. The filing notes individual sale prices ranged from $76.11 to $76.48 across multiple trades executed on May 5, 2026.

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

Following the option exercise and subsequent sale, director Carolin Roger Anthony directly owns 94,409 shares of Amkor common stock. The filing shows this post-transaction balance after selling 20,000 shares acquired through the exercised stock option.

What were the terms of the AMKR stock option exercised by the director?

The exercised director stock option covered 20,000 Amkor common shares at a conversion or exercise price of $11.71 per share. It was originally granted on May 2, 2017 and fully vested on May 1, 2018, according to the disclosure footnote.

Did the AMKR director retain any of the exercised option position?

The derivative position was fully exercised for 20,000 underlying Amkor shares, leaving zero option units outstanding afterward. After the same-day sale of 20,000 common shares, the director’s remaining direct common stock holdings total 94,409 shares.