How many institutions held AMKR - AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share in Q4 2021?

262 institutional investors reported AMKR - AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share for Q4 2021. 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

Q4 2021 13F Holders as of 31 Dec 2021

Security type / class: Equity / Common Stock, par value $0.001 per share
Total 13F shares: 94,202,670
Total 13F value: $2,333,010,085
Share change: -1,160,284
Put/Call ratio: 39%
SEC-reported price per share: $24.79
Number of holders: 262
Value change: -$26,740,663
Number of buys: 123
Number of sells: 123
Shares outstanding: 247,825,997

Security key

031652100

Report period

Q4 2021

Institutions

262

Top holders

AMKR full security history Ownership snapshot Full 13F holder table Newer quarter: Q1 2022 Previous quarter: Q3 2021 AMKOR TECHNOLOGY, INC. SEC filings AMKOR TECHNOLOGY, INC. company facts

Broader feeds

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

Reporting periods

Holder history for CUSIP 031652100

Newer quarter: Q1 2022 Previous quarter: Q3 2021

Recent filing periods:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

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

DIMENSIONAL FUND ADVISORS LP

Disclosed value leader

DIMENSIONAL FUND ADVISORS LP

Comparable rows

15/15

Latest evidence

30 Sep 2021

13F Lead comparable stake: 6.4% Showing 1-6 of 15 holder rows.

Quick read

DIMENSIONAL FUND ADVISORS LP leads the comparable SEC ownership view at 6.4%.

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 DIMENSIONAL FUND ADVISORS LP's linked filing trail.

Comparable ownership Top 5

DIMENSIONAL FUND ADVISORS LP 6.4%

VANGUARD GROUP INC 4.8%

BlackRock Finance, Inc. 4.6%

LSV ASSET MANAGEMENT 3%

FULLER & THALER ASSET MANAGEMENT,... 2%

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
DIMENSIONAL FUND ADVISORS LP	13F Company 13F	6.4%	$397,436,000 15,929,018 shares	—	30 Sep 2021
VANGUARD GROUP INC	13F Company 13F	4.8%	$295,851,000 11,857,762 shares	—	30 Sep 2021
BlackRock Finance, Inc.	13F Company 13F	4.6%	$281,957,000 11,300,959 shares	—	30 Sep 2021
LSV ASSET MANAGEMENT	13F Company 13F	3%	$185,868,000 7,449,652 shares	—	30 Sep 2021
FULLER & THALER ASSET MANAGEMENT, INC.	13F Company 13F	2%	$126,310,000 5,062,533 shares	—	30 Sep 2021
WESTWOOD HOLDINGS GROUP INC	13F Company 13F	1.3%	$81,130,000 3,251,683 shares	—	30 Sep 2021

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 Q4 2021

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

262

94,202,670

Rows available

262

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 Q4 2021 vs Q3 2021 Across Filers

Q3 2021 holders

259

Q4 2021 holders

262

Holder diff

Investor	Q3 2021 Shares	Q4 2021 Shares	Share Diff	Share Chg %	Q3 2021 value	Q4 2021 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend