Amkor insider plans sale of 25,000 AMKR shares

Amkor Technology, Inc. insider Guillaume Rutten filed to potentially sell 25,000 shares of common stock of AMKR through Morgan Stanley Smith Barney LLC Executive Financial Services.

Rhea-AI Filing Summary

Amkor Technology, Inc. insider Guillaume Rutten filed to potentially sell 25,000 shares of common stock of AMKR through Morgan Stanley Smith Barney LLC Executive Financial Services. The shares have an indicated value of $1,383,765.00 and are listed on NASDAQ. The securities relate to Performance Shares dated 08/13/2024. In the past three months, Rutten reported a separate sale of 50,000 common shares on 05/08/2026 for proceeds of $3,713,965.00.

Key Figures

Planned shares to be sold: 25,000 shares Indicated value of planned sale: $1,383,765.00 Past 3 months shares sold: 50,000 shares +2 more

5 metrics

Planned shares to be sold 25,000 shares Common stock indicated for sale under Form 144

Indicated value of planned sale $1,383,765.00 Value of 25,000 AMKR common shares to be sold

Past 3 months shares sold 50,000 shares Common shares sold on 05/08/2026

Value of past 3 months sale $3,713,965.00 Proceeds from 50,000-share sale on 05/08/2026

Performance Shares date 08/13/2024 Date tied to the Performance Shares underlying the planned sale

Key Terms

Form 144, Performance Shares, Securities To Be Sold, Securities Sold During The Past 3 Months

4 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Performance Shares financial

"Common | 08/13/2024 | Performance Shares | Issuer"

Performance shares are a type of company stock given to executives or employees that only become theirs if the company meets specific goals, like hitting certain profits or growth targets. They motivate leaders to work toward the company’s success, because their additional shares depend on achieving these results.

Securities To Be Sold regulatory

"144: Securities To Be Sold"

Securities Sold During The Past 3 Months regulatory

"144: Securities Sold During The Past 3 Months"

FAQ

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

What does the Form 144 filing for AMKR by Guillaume Rutten disclose?

The filing discloses a potential sale of 25,000 AMKR common shares with an indicated value of $1,383,765.00, related to Performance Shares dated 08/13/2024, to be sold through Morgan Stanley Smith Barney LLC on NASDAQ.

How many AMKR shares is Guillaume Rutten planning to sell under this Form 144?

Guillaume Rutten is planning a potential sale of 25,000 AMKR common shares. These shares are associated with Performance Shares dated 08/13/2024 and are to be sold through Morgan Stanley Smith Barney LLC Executive Financial Services.

What is the dollar value of the AMKR shares covered by the new Form 144?

The Form 144 covers AMKR common shares with an indicated value of $1,383,765.00. This value corresponds to the planned sale of 25,000 shares of common stock to be traded on the NASDAQ market.

What prior AMKR share sales has Guillaume Rutten reported in the last 3 months?

In the past three months, Guillaume Rutten reported a prior sale of 50,000 AMKR common shares on 05/08/2026 for total proceeds of $3,713,965.00, as shown in the Form 144 section for securities sold during the past three months.

Through which broker will the AMKR shares in this Form 144 be sold?

The AMKR shares are indicated to be sold through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004, with trading to occur on the NASDAQ market.

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

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Available on EDGAR 08/05/2026 - 04:18 PM Accepted by SEC EDGAR 08/05/2026 - 04:17 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001596796
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	AMKOR TECHNOLOGY, INC.
SEC File Number	000-29472
Address of Issuer	2045 East Innovation Circle Tempe ARIZONA 85284
Phone	(480) 821-5000
Name of Person for Whose Account the Securities are To Be Sold	GUILLAUME RUTTEN
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	25000	1383765.00	248452472	08/05/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/13/2024	Performance Shares	Issuer			25000	08/13/2024	Not Applicable

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
GUILLAUME RUTTEN 2045 East Innovation Circle Tempe AZ 85284	Common	05/08/2026	50000	3713965.00

144: Remarks and Signature

Remarks
Date of Notice	08/05/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Guillaume Marie Jean Rutten
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)