What is CUSIP 031652100?

CUSIP 031652100 is the security identifier used in SEC filing datasets for AMKR - AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share.

Security Snapshot

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

Q: Who owns AMKR - AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share based on 13F filings?

512 institutions reported positions in AMKR - AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share as of Q1 2026. Open the latest holders period and ownership history tables on this page for position-level details.

CUSIP: 031652100

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q1 2026

Institutions Reporting

512

Shares (Excl. Options)

121,061,709

Price

$45.03

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Type / Class: Equity / Common Stock, par value $0.001 per share
Symbol: AMKR on Nasdaq
Shares outstanding: 247,825,997
Price per share: $67.37
All holders as of 31 Mar 2026: Q1 2026
Total 13F shares: 121,061,709
Total reported value: $5,424,065,085
% of total 13F portfolios: 0.01%
Share change: +7,760,250
Value change: +$372,135,236
Number of holders: 512
Price from insider filings: $67.37

Reported Shares, Excluding Options vs Price

Reported Value, Excluding Options

Total Investors

Key facts

AMKR - AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share is tracked under CUSIP 031652100.
512 institutions reported positions in Q1 2026.
2 significant owners is listed from Schedule 13D/13G reporting.

Change

Holder count moved from 454 to 512 between Q4 2025 and Q1 2026.
Reported value moved from $4,488,716,080 to $5,424,065,085.

Research use

You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Form 13F

Latest holder context comes from 512 institutions filings for Q1 2026.

Open SEC Evidence

Security key

031652100

Latest holder period

Q1 2026

13F holders

512

13D/G owners

CIK / CUSIP context first

Open Q1 2026 holders AMKR full holder history AMKOR TECHNOLOGY, INC. SEC filings AMKOR TECHNOLOGY, INC. company facts AMKOR TECHNOLOGY, INC. insider transactions

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

Recent Quarterly Holder Reports

Open recent reporting periods for CUSIP 031652100:

Q1 2026 (512 holders) Q4 2025 (454 holders) Q3 2025 (380 holders) Q2 2025 (342 holders) Q1 2025 (342 holders) Q4 2024 (329 holders) Q3 2024 (355 holders) Q2 2024 (390 holders) Q1 2024 (334 holders) Q4 2023 (313 holders)

Significant Owners of AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share (AMKR) based on Schedule 13D/G filings

Filer	Ownership	Change %	Holdings Value	Net Change	Nb Shares	Change %	Reporting Name	Report Period
KIM JAMES J	30%	-0.32%	$4,366,654,410		75,339,103	0%	John T. Kim	01 May 2026
DIMENSIONAL FUND ADVISORS LP	4.4%		$494,945,849		10,991,469		Dimensional Fund Advisors LP	31 Mar 2026

As of 31 Mar 2026, 512 institutional investors reported holding 121,061,709 shares of AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share (AMKR). This represents 49% of the company’s total 247,825,997 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share (AMKR) together control 35% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution	Ownership %	Shares Held	Share Change %	Portfolio %	Holdings Value
BlackRock, Inc.	5.2%	12,968,765	+0.35%	0.01%	$583,983,481
DIMENSIONAL FUND ADVISORS LP	4.4%	10,991,469	-14%	0.1%	$494,879,378
VANGUARD PORTFOLIO MANAGEMENT LLC	3.7%	9,095,848	0%	0.02%	$409,586,035
VANGUARD CAPITAL MANAGEMENT LLC	2.2%	5,434,318	0%	0.01%	$244,707,340
JPMORGAN CHASE & CO	2.2%	5,406,545	+1505%	0.02%	$223,020,020
STATE STREET CORP	1.5%	3,628,542	+4.5%	0.01%	$163,393,246
EARNEST PARTNERS LLC	1.4%	3,431,843	-9.5%	0.64%	$154,535,890
AQR CAPITAL MANAGEMENT LLC	1.3%	3,242,130	-1.8%	0.06%	$141,421,703
Point72 Asset Management, L.P.	1.2%	2,993,434	-2.3%	0.23%	$134,794,333
GEODE CAPITAL MANAGEMENT, LLC	1.1%	2,730,508	+22%	0.01%	$122,976,233
AMERICAN CENTURY COMPANIES INC	1.1%	2,713,260	-24%	0.06%	$122,178,143
PRINCIPAL FINANCIAL GROUP INC	1.1%	2,622,744	+19%	0.06%	$118,107,208
JANE STREET GROUP, LLC	0.94%	2,329,820	+3578%	0.11%	$104,911,795
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.85%	2,101,538	+0.1%	0.01%	$94,632,256
Fisher Asset Management, LLC	0.81%	2,010,982	-4%	0.03%	$90,554,535
Invesco Ltd.	0.76%	1,889,405	+69%	0.01%	$85,079,908
FIRST TRUST ADVISORS LP	0.72%	1,793,537	-34%	0.06%	$80,762,846
Bridgewater Associates, LP	0.64%	1,580,929	+1976%	0.32%	$71,189,233
D. E. Shaw & Co., Inc.	0.6%	1,488,765	+862%	0.05%	$67,039,088
Allianz Asset Management GmbH	0.56%	1,384,433	+37%	0.07%	$62,341,017
MORGAN STANLEY	0.55%	1,372,808	-24%	0%	$61,817,646
LSV ASSET MANAGEMENT	0.53%	1,310,500	-54%	0.13%	$59,012,000
TWO SIGMA INVESTMENTS, LP	0.49%	1,213,894	+120%	0.05%	$54,661,647
UBS Group AG	0.46%	1,137,297	-9.4%	0.01%	$51,212,483
Gotham Asset Management, LLC	0.43%	1,073,270	-10%	0.15%	$48,329,348

Institutional Holders of AMKOR TECHNOLOGY, INC. - Common Stock, par value $0.001 per share (AMKR) across Reporting Periods

Period	Reported Shares, Excl. Options	Value, Excl. Options	Value Change	Puts Notional Value	Calls Notional Value	Price (Median)	Investors
2026 Q1	121,061,709	$5,424,065,085	+$372,135,236	$86,417,073	$128,344,626	$45.03	512
2025 Q4	113,624,803	$4,488,716,080	+$266,263,948	$95,916,660	$164,982,972	$39.48	454
2025 Q3	107,601,765	$3,056,601,018	-$122,745,222	$24,380,676	$23,264,288	$28.40	380
2025 Q2	113,048,162	$2,373,273,979	+$114,953,962	$214,979,579	$18,500,586	$20.99	342
2025 Q1	108,040,907	$1,951,026,308	-$73,920,018	$119,611,707	$21,490,872	$18.06	342
2024 Q4	109,268,438	$2,808,251,495	+$48,269,580	$166,469,559	$8,579,981	$25.69	329
2024 Q3	106,546,220	$3,260,732,392	-$13,756,975	$10,824,133	$15,741,915	$30.60	355
2024 Q2	105,697,517	$4,229,651,116	+$5,014,289	$15,479,736	$36,518,250	$40.02	390
2024 Q1	105,879,554	$3,413,107,862	+$20,011,006	$9,033,248	$17,061,208	$32.24	334
2023 Q4	105,124,159	$3,497,270,269	+$89,633,171	$13,690,605	$18,544,698	$33.27	313
2023 Q3	103,279,977	$2,334,355,321	+$143,785,224	$8,249,000	$9,955,300	$22.60	302
2023 Q2	96,176,374	$2,860,531,372	+$59,728,154	$10,665,375	$16,395,225	$29.75	296
2023 Q1	94,043,251	$2,446,697,086	-$4,834,836	$8,492,928	$7,748,756	$26.02	288
2022 Q4	94,611,993	$2,268,275,281	+$15,076,608	$18,963,460	$12,517,514	$23.98	286
2022 Q3	94,297,197	$1,607,072,114	-$14,343,196	$2,295,000	$3,681,000	$17.05	256
2022 Q2	95,047,466	$1,610,443,259	+$20,533,305	$2,511,000	$4,671,000	$16.95	249
2022 Q1	94,191,158	$2,046,902,897	-$7,662,310	$6,002,000	$7,362,000	$21.72	269
2021 Q4	94,202,670	$2,333,010,085	-$26,740,663	$3,370,000	$8,716,000	$24.79	262
2021 Q3	94,042,864	$2,349,598,089	+$12,351,091	$5,542,000	$14,055,000	$24.95	259
2021 Q2	93,795,445	$2,220,006,298	-$50,219,832	$5,809,000	$8,687,000	$23.67	248
2021 Q1	95,959,772	$2,276,575,528	+$109,696,190	$10,041,000	$9,154,000	$23.71	251
2020 Q4	93,431,334	$1,410,249,949	-$1,448,670	$2,161,000	$3,847,000	$15.08	218
2020 Q3	93,110,951	$1,043,074,900	-$30,643,497	$2,216,000	$1,819,000	$11.20	208
2020 Q2	95,773,944	$1,178,959,300	+$41,595,176	$2,598,000	$3,627,000	$12.31	199
2020 Q1	93,315,283	$726,805,605	-$25,793,054	$1,652,000	$1,632,000	$7.79	196
2019 Q4	95,106,428	$1,236,337,028	+$70,969,734	$827,000	$4,401,000	$13.00	191
2019 Q3	90,100,982	$819,861,307	-$18,035,237	$278,000	$1,184,000	$9.10	167
2019 Q2	92,211,747	$687,729,543	-$6,029,029	$577,000	$934,000	$7.46	154
2019 Q1	93,377,355	$797,426,735	+$15,412,646	$702,000	$1,390,000	$8.54	166
2018 Q4	92,110,567	$604,229,570	-$13,247,100	$643,000	$433,000	$6.56	160
2018 Q3	93,818,403	$693,313,737	+$3,464,615	$931,000	$215,000	$7.39	161
2018 Q2	91,327,570	$784,511,472	-$51,985,796	$1,224,000	$1,411,000	$8.59	146
2018 Q1	98,558,061	$998,425,994	+$30,065,545	$1,022,000	$801,000	$10.13	165
2017 Q4	96,328,845	$968,141,777	-$4,609,224	$1,045,000	$1,312,000	$10.05	173
2017 Q3	96,461,556	$1,018,108,478	+$7,457,944	$894,000	$1,977,000	$10.55	151
2017 Q2	96,012,376	$938,056,331	+$14,785,532	$1,254,000	$1,579,000	$9.77	155
2017 Q1	93,822,303	$1,087,392,791	+$157,318,915	$1,452,000	$3,122,000	$11.59	163
2016 Q4	88,933,959	$938,638,626	+$78,642,402	$3,652,000	$3,977,000	$10.55	182
2016 Q3	79,875,126	$775,758,499	+$41,892,354	$3,612,000	$5,143,000	$9.72	163
2016 Q2	76,660,728	$440,785,255	-$14,758,781	$2,295,000	$2,551,000	$5.75	136
2016 Q1	78,692,198	$463,441,983	+$3,770,347	$2,098,000	$2,539,000	$5.89	128
2015 Q4	78,193,477	$475,528,294	+$7,505,127	$3,956,000	$4,857,000	$6.08	152
2015 Q3	76,688,810	$344,321,523	-$22,031,053	$3,162,000	$836,000	$4.49	139
2015 Q2	81,044,949	$484,658,805	+$498,394	$4,944,000	$1,505,000	$5.98	157
2015 Q1	78,939,268	$697,365,584	+$15,601,418	$5,080,770	$1,913,000	$8.84	183
2014 Q4	78,971,950	$560,447,211	-$30,846,213	$2,417,000	$8,736,000	$7.10	168
2014 Q3	81,616,533	$686,494,432	-$7,257,103	$8,734,000	$12,283,000	$8.41	188
2014 Q2	82,136,017	$915,847,995	+$173,266,265	$16,089,000	$23,765,000	$11.18	180
2014 Q1	69,388,399	$476,370,052	+$2,157,653	$230,000	$1,881,000	$6.86	136