Key facts
- This page summarizes John T. Kim's Form 4 filing for AMKOR TECHNOLOGY, INC. (AMKR).
- 1 reported transaction and 0 derivative rows are listed below.
- Accepted by SEC: 17 Feb 2026, 16:21.
John T. Kim - 12 Feb 2026 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)
- Reporting relationship
- Member of 10% owner group (6), 10%+ Owner
- Issuer ticker
- AMKR
- Reported as of
- 12 Feb 2026
- Net transaction value
- -$484,900,000
- SEC form
- 4
- Accepted by SEC
- 17 Feb 2026, 16:21:03 UTC
- Prior SEC filing
- 30 Dec 2025
- Source filing
- View source filing
- Reporting owner signature
- /s/ Brian D. Short, Attorney-in-Fact for John T. Kim
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
John T. Kim filed Form 4 for AMKOR TECHNOLOGY, INC. (AMKR) on 17 Feb 2026.
Change
- Previous filing in this sequence was filed on 30 Dec 2025.
- Current net transaction value: -$484,900,000.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001158926
Primary reporting owner
KIM JOHN T
- Relationship
- Member of 10% owner group (6), 10%+ Owner
- Address
- C/O SIANA CARR O'CONNOR & LYNAM, 1500 EAST LANCASTER AVENUE, PAOLI
- Signature
- /s/ Brian D. Short, Attorney-in-Fact for John T. Kim
- Signature date
- 17 Feb 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
AMKR
transaction
Common Stock
Sale
- Transaction value
- $484,900,000
- Shares
- -10,000,000
- Change %
- -25%
- Price
- $48.49
- Shares after
- 29,594,980
- Date
- 12 Feb 2026
- Ownership
- By 915 Investments, LP
- Footnotes
- F1, F2, F3, F4
AMKR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 5,594,489
- Date
- 12 Feb 2026
- Ownership
- Direct
AMKR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,253,250
- Date
- 12 Feb 2026
- Ownership
- By own GRATs
- Footnotes
- F2, F3, F4
AMKR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 9,846,944
- Date
- 12 Feb 2026
- Ownership
- By trusts (other than GRAT & Rev. Trust)
- Footnotes
- F2, F3, F4
AMKR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 19,484,809
- Date
- 12 Feb 2026
- Ownership
- By Sujochil, LP
- Footnotes
- F2, F3, F4
AMKR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 16,710,668
- Date
- 12 Feb 2026
- Ownership
- By Kim Capital Partners - KCP, LLC
- Footnotes
- F2, F3, F4
AMKR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 3,789,479
- Date
- 12 Feb 2026
- Ownership
- By Sujoda Investments, LP
- Footnotes
- F2, F3, F4, F5
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 5 footnotes
Footnote F1
On February 12, 2026, 915 Investments, LP sold 10,000,000 shares of Common Stock of Amkor Technology, Inc. (the "Issuer") pursuant to an underwritten secondary offering. The Reporting Person is the general partner of 915 Investments, LP.
Footnote F2
The Reporting Person is (i) a trustee of family trusts for the benefit of his immediate family members (other than Grantor Retained Annuity Trusts ("GRATS") which own 9,846,944 shares of the Issuer's Common Stock, (ii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 1,253,250 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock (iv) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock
Footnote F3
(continued from Footnote 2) (v) a general partner of a limited partnership which owns 29,594,980 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 4, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares.
Footnote F4
The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.
Footnote F5
The sole general partner of Sujoda Investments, LP is Sujoda Management, LLC. The Reporting Person is one of three members of Sujoda Management, LLC. Sujoda Management, LLC is being treated as a limited partnership for purposes of Section 16, and, pursuant to the Form 4 instructions, the Reporting Person has elected to treat all of the shares of the Issuer's Common Stock owned by Sujoda Investments, LP as beneficially owned by the Reporting Person.
SEC remarks
(6) The Reporting Person states that the filing of this Form 4 shall not be deemed an admission that the Reporting Person is the beneficial owner of the reported securities owned by the other members of the group, for the purpose of Section 16, or for any other purpose.