GROUP ONE TRADING LLC

Position in AEHR — Aehr Test Systems

CIK 932540 CHICAGO, IL

Position in AEHR

as of Mar 31, 2026 · filed May 13, 2026 Compact

Position Value

$473,066

+$230,259 QoQ

Shares Held

12,758

+58.2% QoQ

Ownership

0.041%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2021

12 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Technology · as of Mar 31, 2026

GROUP ONE TRADING LLC holds $10,855,791 across 15 Semiconductor Equipment & Materials names. AEHR ranks #6 (4.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ACMR	ACM Research, Inc.	91,427	$3,597,652
2	Q	Qnity Electronics, Inc.	23,235	$2,680,854
3	AXTI	Axt Inc	36,902	$2,102,675
4	PLAB	Photronics Inc	13,297	$537,331
5	DQ	Daqo New Energy Corp.	24,326	$517,414
6	AEHR	Aehr Test Systems This page	12,758	$473,066
7	ATOM	Atomera Inc	83,116	$316,671
8	KLAC	Kla Corp	1,713	$252,223

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
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.