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AMKR · Amkor Technology, Inc. · Holdings

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$55.65 +1.02 (+1.87%)
Market Cap
$13.18B
Shares
247.87M
Volume · Oct 5 4.33M Avg daily vol (3M) 4.77M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 655
Total Value: $10,534,647,627
Total Shares: 122,215,909
Showing 1–100 of 685 holdings by value · page 1 of 7

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 654 13F filers
Top Holder
10.1%
Sep 2023 → Jun 2026 · range 10.1% – 14.4%
of institutional value
Top 5
34.8%
Sep 2023 → Jun 2026 · range 34.8% – 52.2%
of institutional value
Top 10
47.7%
Sep 2023 → Jun 2026 · range 47.7% – 65.0%
of institutional value
HHI
336
Sep 2023 → Jun 2026 · range 336 – 702
Broadly held
Showing 100 of 685
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1047127 CUSIP 031652100 13F (30d) 15 filings 14 filers Visit website Investor relations