Security key
031652100
AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share (AMKR)
CUSIP: 031652100
Q3 2026 13F Holders as of 30 Sep 2026
- Security type / class
- Equity / Common Stock, par value $0.001 per share
- Total 13F shares
- 106,250
- Total 13F value
- $5,547,212
- Share change
- +1,786
- SEC-reported price per share
- $52.38
- Number of holders
- 18
- Value change
- -$198,155
- Number of buys
- 10
- Number of sells
- 9
- Shares outstanding
- 247,825,997
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2026
Institutions
18
Top holders
10
AMKR full security history
Ownership snapshot
Full 13F holder table
AMKOR TECHNOLOGY, INC. SEC filings
AMKOR TECHNOLOGY, INC. company facts
Broader feeds
Ownership snapshot
Top reported holders of AMKR - AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
James J. Kim
Disclosed value leader
John T. Kim
Comparable rows
15/15
Latest evidence
08 Sep 2026
13D/G
3/4/5
13F
Lead comparable stake: 30%
13D/G row: James J. Kim
Showing 1-6 of 15 holder rows.
Quick read
James J. Kim leads the comparable SEC ownership view at 30%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens James J. Kim's linked filing trail.
Comparable ownership
Top 5
James J. Kim
30%
DIMENSIONAL FUND ADVISORS LP
4.4%
John T. Kim
35%
915 Investments, LP
12%
Agnes C. Kim
4.5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| James J. Kim |
13D/G
3/4/5
John T. Kim · Member of 10% owner group (5), 10%+ Owner
|
30%
|
$4,366,654,410
75,339,103 shares
|
$0 | 01 May 2026 |
| DIMENSIONAL FUND ADVISORS LP |
13F
13D/G
Company
|
4.4%
from 13D/G
|
$695,285,204
8,064,191 shares
|
— | 30 Jun 2026 |
| John T. Kim |
3/4/5
Member of 10% owner group (6), 10%+ Owner
|
35%
|
$4,398,838,899
86,274,619 shares
|
-$484,900,000 | 12 Feb 2026 |
| 915 Investments, LP |
3/4/5
Member of 10% owner group (2)
|
12%
|
$1,435,060,580
29,594,980 shares
|
-$484,900,000 | 12 Feb 2026 |
| Agnes C. Kim |
3/4/5
Member of 10% owner group (4)
|
4.5%
|
$964,685,621
11,187,355 shares
|
— | 20 Jul 2026 |
| David D. Kim |
3/4/5
Member of 10% owner group (5)
|
2.6%
|
$141,980,797
6,496,738 shares
|
— | 01 Aug 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q3 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
18
Shares
106,250
Rows available
18
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q3 2026 vs Q2 2026 Across Filers
Q2 2026 holders
645
Q3 2026 holders
18
Holder diff
-627
| Investor | Q2 2026 Shares | Q3 2026 Shares | Share Diff | Share Chg % | Q2 2026 value | Q3 2026 value | Value change | Value Chg % |
|---|