$AMKR

$36.81 -$2.49 (6.34%) Close

$AMKR Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 248.5M shares outstanding

Who owns AMKR?

By type of holder

Institutions 46.6% Insiders 53.4% Everyone else 0.0%

Concentration Top 10 holders own 98.7%

Kim Agnes C 60.5% · 915 Investments, LP 11.9%

Institutional ownership

46.6%

-2.3 pts vs last qtr

Institutional holders

646

+112 vs last qtr

Net shares bought

−5.7M

by institutions in Q2 2026

New / sold out

171 / 59

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Clal Insurance Enterprises Holdings Ltd NEW +1.8M
Norges Bank NEW +1.5M

Biggest sellers in Q2 2026

Dimensional Fund Advisors LP −2.9M
Jane Street Group, LLC −2.0M

Who is planning to sell?

Notices of proposed sale, last 12 months

$21.8M

39 notices from 12 people

Shares covered

393.2K

0.16% of the company

Arranged in advance

30%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Guillaume Rutten Director $9.19M
Mark N Rogers Officer 10b5-1 $3.91M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

+4.4%

+0.48% a year

Each share's claim on the business

−4.2%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $99.6M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years71% 3–5 years6% 1–3 years8% Under 1 year16%

Quarterly turnover

19.1%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting AMKR on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	12.3M	4.95%	−676.0K (−5.2%)	≤2021	0.0%
Shares held by quarter Peak holding14.9M (Q2'25) Change over 8 quarters+879.8K Share of the company4.950% BlackRock, Inc.'s full portfolio →
DF Dimensional Fund Advisors LP	8.1M	3.25%	−2.9M (−26.6%)	≤2021	0.1%
Shares held by quarter Peak holding13.4M (Q3'24) Change over 8 quarters−5.3M Share of the company3.250% Dimensional Fund Advisors LP's full portfolio →

BlackRock, Inc.

12.3M

% of company

4.95%

Change vs last qtr

−676.0K (−5.2%)

Held since

≤2021

Dimensional Fund Advisors LP

8.1M

% of company

3.25%

Change vs last qtr

−2.9M (−26.6%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Amkor Technology, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting AMKR on Form N-PORT; together they hold 21.1% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$441M	5.1M	2.06%	0.02%	June 30, 2026
IC iShares Core S&P Mid-Cap ETF iShares Trust	$336M	3.9M	1.57%	0.27%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$441M

% of company

2.06%

% of the fund

0.02%

As of

June 30, 2026

iShares Core S&P Mid-Cap ETF

iShares Trust

Position value

$336M

% of company

1.57%

% of the fund

0.27%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Amkor Technology, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
KA Kim Agnes C Insider	150.2M	60.46%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company60.460% Kim Agnes C's insider activity →
9I 915 Investments, LP Insider	29.6M	11.91%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company11.910% 915 Investments, LP's insider activity →

Kim Agnes C

Insider

150.2M

% of company

60.46%

Change vs last qtr

—

Held since

—

915 Investments, LP

Insider

29.6M

% of company

11.91%

Change vs last qtr

—

Held since

—

23 more holders behind a free account

See every insider and 5%+ holder of Amkor Technology, Inc..

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