Amkor Technology

AMKR • NASDAQ

Amkor Technology is a semiconductors company in the technology sector on NASDAQ, led by Giel Rutten, with a market cap of $11.0B. As of Q3 2025, 44% of shares are held by 371 institutional investors, with VANGUARD GROUP INC as the largest holder at 6.38%.

President and Chief Executive OfficerGiel Rutten

Market Cap$11.0B

Semiconductors

Technology

Employees28.7K

Websiteamkor.com

Country

United States of America

Overview

Overview of institutional ownership in AMKR as of Q3 2025 with a market cap of $7.0B

All Institutions

Institutions: 371
Value Held: $3.1B
Shares Held: 107.6M
Avg Position: $8.3M
Median Position: $517.6K

Hedge Funds

Hedge Funds: 42
Value Held: $331.7M
Shares Held: 11.7M
Avg Position: $7.9M
Median Position: $1.3M

Ownership Breakdown

Institutional (non-HF)

39.13%

$2.7B

Hedge Funds

4.73%

$331.7M

Retail & Other

56.14%

$3.9B

Based on market cap of $7.0B as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in AMKR as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
VANGUARD GROUP INC Institution	Salim Ramji CEO	$448.1M 0.01% of portfolio	6.38% 15.8M shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
B BlackRock, Inc. Institution	-	$392.9M 0.01% of portfolio	5.60% 13.8M shares	≤ Q2 2013 Held for 12y 5m+	$5.67T
DIMENSIONAL FUND ADVISORS LP Long Only Manager	David Paul Butler CEO	$373.5M 0.08% of portfolio	5.32% 13.2M shares	≤ Q2 2013 Held for 12y 5m+	$466.32B
AQR CAPITAL MANAGEMENT LLC Hedge Fund•Multi-Strategy	David Gary Kabiller Founder	$119.6M 0.08% of portfolio	1.70% 4.2M shares	≤ Q2 2013 Held for 12y 5m+	$156.17B
EARNEST PARTNERS LLC Long Only Manager	Paul Ernest Viera CEO	$119.5M 0.52% of portfolio	1.70% 4.2M shares	Q3 2022 Held for 3y 2m	$23.1B
L LSV ASSET MANAGEMENT Long Only Manager	Josef Nmn Lakonishok CEO	$113.1M 0.25% of portfolio	1.61% 4.0M shares	≤ Q2 2013 Held for 12y 5m+	$45.1B
A AMERICAN CENTURY COMPANIES INC Institution	-	$108.9M 0.06% of portfolio	1.55% 3.8M shares	Q2 2019 Held for 6y 5m	$195.93B
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$97.3M 0.00% of portfolio	1.39% 3.4M shares	≤ Q2 2013 Held for 12y 5m+	$2.88T
S SW Investment Management LLC Institution	-	$75.3M 14.60% of portfolio	1.07% 2.7M shares	Q1 2021 Held for 4y 8m	$515.3M
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$64.7M 0.00% of portfolio	0.92% 2.3M shares	≤ Q2 2013 Held for 12y 5m+	$1.57T

Net Capital Flow

Institutional buying and selling activity for AMKR in Q3 2025

Traded: −$22.0M
Buyers: 206
Sellers: 148
Total Bought: +$315.4M
Total Sold: −$337.4M
Avg Position: $7.5M

Biggest Buyers

Institution	Net Bought	Current Position
ARROWSTREET CAPITAL LIMITED PARTNERSHIP Hedge Fund•Quant	+$33.7M +1.2M shares	$44.7M 1.6M shares
C Colony Group, LLC Institution	+$23.9M +121.3K shares	$23.9M 121.3K shares
Invesco Ltd. ETF Provider	+$20.0M +703.6K shares	$34.9M 1.2M shares
VANGUARD GROUP INC Institution	+$19.5M +687.9K shares	$448.1M 15.8M shares
AQR CAPITAL MANAGEMENT LLC Hedge Fund•Multi-Strategy	+$18.6M +653.5K shares	$119.6M 4.2M shares
N Nuveen, LLC Institution	+$14.9M +524.8K shares	$20.9M 735.7K shares
SEGALL BRYANT & HAMILL Long Only Manager	+$13.3M +468.2K shares	$16.2M 568.9K shares
Ceredex Value Advisors LLC Long Only Manager	+$12.1M +426.1K shares	$12.1M 426.1K shares
AMERIPRISE FINANCIAL INC Institution	+$11.6M +408.9K shares	$17.5M 616.5K shares
WELLINGTON MANAGEMENT CO LLP Long Only Manager	+$10.7M +375.9K shares	$18.7M 659.8K shares

Biggest Sellers

Institution	Net Sold	Current Position
JACOBS LEVY EQUITY MANAGEMENT, INC Hedge Fund•Quant	−$34.1M −1.2M shares	$13.6M 479.9K shares
B BlackRock, Inc. Institution	−$30.4M −1.1M shares	$392.9M 13.8M shares
U UG Investment Advisers Ltd. Institution	−$26.5M −932.2K shares	$5.0M 177.3K shares
L LSV ASSET MANAGEMENT Long Only Manager	−$24.1M −850.2K shares	$113.1M 4.0M shares
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	−$22.2M −782.1K shares	$9.7M 343.0K shares
VOLORIDGE INVESTMENT MANAGEMENT, LLC Hedge Fund•Multi-Strategy	−$20.0M −953.0K shares	Sold Off 0 shares
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	−$16.7M −586.8K shares	$21.0M 740.4K shares
Bank of New York Mellon Corp Institution	−$9.9M −348.8K shares	$38.2M 1.3M shares
Point72 Asset Management, L.P. Hedge Fund•Multi-Strategy	−$9.2M −322.5K shares	$4.8M 168.8K shares
BANK OF AMERICA CORP /DE/ Institution	−$8.2M −290.0K shares	$8.2M 287.4K shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited AMKR in Q3 2025

New Positions: 38
New Value: $18.5M
Exited Positions: 37
Exited Value: $55.0M

New Positions

Institution	Position Value
D DnB Asset Management AS Institution	$4.0M 139.7K shares
S Soviero Asset Management, LP Hedge Fund•Long/Short	$3.0M 105.0K shares
Voleon Capital Management LP Hedge Fund•Quant	$2.1M 74.9K shares
AI-Squared Management Ltd Private Equity	$1.8M 64.8K shares
S Shay Capital LLC Institution	$880.4K 31.0K shares
Levin Easterly Partners LLC Long Only Manager	$597.8K 21.0K shares
M MOODY NATIONAL BANK TRUST DIVISION Institution	$587.4K 20.7K shares
Buckingham Strategic Partners RIA/Wealth	$509.8K 15.2K shares
Sowell Financial Services LLC RIA/Wealth	$504.3K 17.8K shares
M Massar Capital Management, LP Institution	$481.4K 17.0K shares

Exited Positions

Institution	Previous Position
VOLORIDGE INVESTMENT MANAGEMENT, LLC Hedge Fund•Multi-Strategy	$20.0M 953.0K shares
M Maxi Investments CY Ltd Institution	$5.1M 243.5K shares
LEUCADIA NATIONAL CORP Institution	$4.2M 199.2K shares
Granite Investment Partners, LLC Long Only Manager	$3.2M 152.5K shares
Aquatic Capital Management LLC Hedge Fund•Quant	$2.8M 131.5K shares
T TEXAS PERMANENT SCHOOL FUND Institution	$2.7M 129.0K shares
Caption Management, LLC Hedge Fund•Long/Short	$2.5M 118.3K shares
BANK OF NOVA SCOTIA / Institution	$1.9M 92.8K shares
Marshall Wace LLP Institution	$1.6M 76.9K shares
Hudson Bay Capital Management LP Hedge Fund•Multi-Strategy	$1.5M 70.5K shares

Options Activity

Institutions with the largest Call and Put options positions in AMKR as of Q3 2025

Call Positions: 12
Call Value: $23.3M
Put Positions: 16
Put Value: $24.4M

Call Positions

Institution	Position Value
CAPITAL FUND MANAGEMENT S.A. Hedge Fund•Quant Macro	$4.6M 1.6K contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$4.4M 1.5K contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$3.6M 1.3K contracts
J JANE STREET GROUP, LLC Institution	$2.6M 898.0 contracts
W WOLVERINE TRADING, LLC Institution	$2.5M 864.0 contracts
Walleye Trading LLC RIA/Wealth	$1.5M 518.0 contracts
N NOMURA HOLDINGS INC Institution	$1.2M 418.0 contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	$934.4K 329.0 contracts
S Squarepoint Ops LLC Hedge Fund•Quant	$778.2K 274.0 contracts
P PEAK6 LLC Institution	$670.2K 236.0 contracts

Put Positions

Institution	Position Value
J JANE STREET GROUP, LLC Institution	$8.7M 3.1K contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$5.7M 2.0K contracts
Caption Management, LLC Hedge Fund•Long/Short	$3.3M 1.2K contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$2.3M 827.0 contracts
CAPITAL FUND MANAGEMENT S.A. Hedge Fund•Quant Macro	$1.3M 448.0 contracts
W WOLVERINE TRADING, LLC Institution	$1.2M 413.0 contracts
Walleye Trading LLC RIA/Wealth	$593.6K 209.0 contracts
T Twin Tree Management, LP Hedge Fund•Vol Arbitrage	$443.0K 156.0 contracts
S Squarepoint Ops LLC Hedge Fund•Quant	$443.0K 156.0 contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	$284.0K 100.0 contracts

Most Committed Institutions

Institutions with AMKR as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
S SW Investment Management LLC Institution	-	14.60% $75.3M	1.07% 2.7M shares	Q1 2021 Held for 4y 8m	$515.3M
Bandera Partners LLC Hedge Fund•Value	Jefferson Philip Gramm Managing Partner	9.63% $22.0M	0.31% 773.5K shares	Q1 2021 Held for 4y 8m	$228.1M
AI-Squared Management Ltd Private Equity	-	1.92% $1.8M	0.03% 64.8K shares	Q3 2025 Held for 2 months	$96.0M
S Soviero Asset Management, LP Hedge Fund•Long/Short	Thomas E King CFO	1.84% $3.0M	0.04% 105.0K shares	Q3 2025 Held for 2 months	$161.8M
1492 Capital Management LLC Long Only Manager	Joseph Anthony Frohna Managing Partner	1.37% $3.4M	0.05% 120.3K shares	Q3 2023 Held for 2y 2m	$249.8M
U UG Investment Advisers Ltd. Institution	-	0.86% $5.0M	0.07% 177.3K shares	Q1 2025 Held for 8 months	$582.8M
SummerHaven Investment Management, LLC Long Only Manager	Kurt Jonathon Nelson CEO	0.64% $1.1M	0.02% 38.7K shares	Q3 2025 Held for 2 months	$170.9M
G Ground Swell Capital, LLC Hedge Fund•Multi-Strategy	Joey Howard Foxhall Member	0.56% $258.7K	0.00% 9.1K shares	Q3 2025 Held for 2 months	$45.8M
Ambassador Advisors, LLC RIA/Wealth	Christopher George Cousins President	0.56% $3.6M	0.05% 128.5K shares	Q4 2023 Held for 1y 11m	$656.4M
EARNEST PARTNERS LLC Long Only Manager	Paul Ernest Viera CEO	0.52% $119.5M	1.70% 4.2M shares	Q3 2022 Held for 3y 2m	$23.1B

Hedge Fund Spotlight

Discover hedge funds investing in AMKR

Engineers Gate Manager LP

Hedge Fund • Quant

Portfolio ManagerRobert Gregory Eisner

Portfolio Value: $8.8B
Positions: 2,112
Last Reported: Q3 2025

Sector Allocation

Position in Amkor Technology

Market Value: $3.0M
Shares Held: 105.9K
Portfolio Weight: 0.03%
Owned Since: 2022-Q4

Top Holding	Sector	Market Value	Weight
1 Invesco QQQ Trust QQQ	ETF ETF	$155.2M	1.77%
2 SPDR S&P 500 ETF Trust SPY	ETF ETF	$115.3M	1.32%
3 Sabra Healthcare SBRA	REIT - Healthcare Facilities Real Estate	$112.9M	1.29%