GROUP ONE TRADING LLC

Position in AEHR — Aehr Test Systems

CIK 932540 CHICAGO, IL

Position in AEHR

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

Position Value

$1,659,052

+$1,185,986 QoQ

Shares Held

17,271

+35.4% QoQ

Ownership

0.053%

of shares outstanding

% of Portfolio

0.06%

of 13F equity value

Holder Rank

#96

of 262 holders

Holding Since

Sep 2021

13 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. AEHR ranks #6 (3.2% 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.	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 This page	17,271	$1,659,052
7	Q	Qnity Electronics, Inc.	6,699	$1,094,013
8	ATOM	Atomera Inc	73,496	$640,150

13 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$1,659,052	17,271	+35.4%	Shares	Sole	2026-08-14
2026-03-31	$473,066	12,758	+58.2%	Shares	Sole	2026-05-13
2025-09-30	$242,807	8,064	+13.0%	Shares	Sole	2025-11-12
2024-12-31	$118,688	7,137	-66.2%	Shares	Sole	2025-05-14
2024-09-30	$270,942	21,085	-24.2%	Shares	Sole	2024-11-14
2024-03-31	$344,955	27,819	-88.0%	Shares	Sole	2024-05-10
2023-12-31	$6,133,948	231,208	+40.2%	Shares	Sole	2024-02-14
2023-09-30	$7,534,010	164,858	-32.4%	Shares	Sole	2023-11-09
2023-06-30	$10,060,957	243,902	-1.4%	Shares	Sole	2023-08-09
2023-03-31	$7,676,147	247,458	+256.9%	Shares	Sole	2023-05-12
2022-12-31	$1,393,492	69,328	-78.1%	Shares	Sole	2023-02-09
2022-09-30	$4,459,139	316,251	+46.2%	Shares	Sole	2022-11-09
2021-09-30	$2,951,853	216,253	—	Shares	Sole	2021-11-12
No filing history on record for this holder in this stock.