How many institutions held AMKR - AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share in Q3 2026?

337 institutional investors reported AMKR - AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share for Q3 2026. Use the holders table for investor-level position and value details.

AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share (AMKR)

Q: What does CUSIP 031652100 represent in this 13F holders report?

CUSIP 031652100 is the security identifier for AMKR - AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share used to aggregate holder disclosures.

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: 54,745,180
Total 13F value: $2,865,596,164
Share change: -3,267,072
Put/Call ratio: 119%
SEC-reported price per share: $52.38
Number of holders: 337
Value change: -$218,722,606
Number of buys: 186
Number of sells: 209
Shares outstanding: 247,825,997

Security key

031652100

Report period

Q3 2026

Institutions

337

Top holders

AMKR full security history Ownership snapshot Full 13F holder table AMKOR TECHNOLOGY, INC. SEC filings AMKOR TECHNOLOGY, INC. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

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

2/15

Latest evidence

22 Sep 2026

13D/G 3/4/5 13F Lead comparable stake: 30% 13 rows are not safely comparable across share classes. 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%.

2 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 2

James J. Kim 30%

DIMENSIONAL FUND ADVISORS LP 4.4%

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 13D/G 3/4/5	30% Reported 13D/G · 01 May 2026	$4,366,654,410 75,339,103 shares	$0	01 May 2026
DIMENSIONAL FUND ADVISORS LP	13F 13D/G Company 13F 13D/G	4.4% Reported 13D/G · 31 Mar 2026	$695,285,204 8,064,191 shares	—	30 Jun 2026
John T. Kim	3/4/5 Member of 10% owner group (6), 10%+ Owner 3/4/5	— denominator unverified	$4,398,838,899 86,274,619 shares	-$484,900,000	12 Feb 2026
Susan Y. Kim	3/4/5 Director, Member of 10% owner group (5), 10%+ Owner 3/4/5	— mixed-class rows	$3,634,193,891 42,147,499 shares mixed-class rows	—	22 Sep 2026
915 Investments, LP	3/4/5 Member of 10% owner group (2) 3/4/5	— denominator unverified	$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) 3/4/5	— denominator unverified	$964,685,621 11,187,355 shares	—	20 Jul 2026

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

337

54,745,180

Rows available

337

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

648

Q3 2026 holders

337

Holder diff

-311

Investor	Q2 2026 Shares	Q3 2026 Shares	Share Diff	Share Chg %	Q2 2026 value	Q3 2026 value	Value change	Value Chg %