GROUP ONE TRADING LLC

Position in AMKR — Amkor Technology, Inc.

CIK 932540 CHICAGO, IL

Position in AMKR

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$11,152,470

+$10,293,465 QoQ

Shares Held

129,334

+494.4% QoQ

Ownership

0.052%

of shares outstanding

% of Portfolio

0.38%

of 13F equity value

Holder Rank

#98

of 642 holders

Holding Since

Mar 2020

14 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Technology · as of Jun 30, 2026

GROUP ONE TRADING LLC holds $52,564,758 across 15 Semiconductor Equipment & Materials names. AMKR ranks #3 (21.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ACMR	ACM Research, Inc.	157,056	$19,928,835
2	AXTI	Axt Inc	168,015	$12,110,521
3	AMKR	Amkor Technology, Inc. This page	129,334	$11,152,470
4	TER	Teradyne, Inc	4,595	$2,223,244
5	KLAC	Kla Corp	6,218	$1,876,032
6	AEHR	Aehr Test Systems	17,271	$1,659,052
7	Q	Qnity Electronics, Inc.	6,699	$1,094,013
8	ATOM	Atomera Inc	73,496	$640,150

14 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$11,152,470	129,334	+494.4%	Shares	Sole	2026-08-14
2025-12-31	$859,005	21,758	-66.9%	Shares	Sole	2026-02-12
2025-09-30	$1,865,851	65,699	+34.0%	Shares	Sole	2025-11-12
2025-06-30	$1,029,055	49,026	-76.9%	Shares	Sole	2025-08-14
2025-03-31	$3,825,938	211,846	+2903.2%	Shares	Sole	2025-05-14
2024-06-30	$282,301	7,054	-37.4%	Shares	Sole	2024-08-14
2024-03-31	$363,538	11,276	-48.0%	Shares	Sole	2024-05-10
2023-12-31	$721,659	21,691	+0.4%	Shares	Sole	2024-02-14
2023-06-30	$642,570	21,599	+170.5%	Shares	Sole	2023-08-09
2023-03-31	$207,743	7,984	-34.2%	Shares	Sole	2023-05-12
2022-12-31	$290,877	12,130	+1.1%	Shares	Sole	2023-02-09
2020-12-31	$181,005	12,003	+57.8%	Shares	Sole	2021-02-10
2020-06-30	$93,617	7,605	+11.0%	Shares	Sole	2020-08-13
2020-03-31	$53,392	6,854	—	Shares	Sole	2020-05-13
No filing history on record for this holder in this stock.