GROUP ONE TRADING LLC

Position in PLAB — Photronics Inc

CIK 932540 CHICAGO, IL

Position in PLAB

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

Position Value

$537,331

-$114,288 QoQ

Shares Held

13,297

-53.2% QoQ

Ownership

0.023%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

14 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. PLAB ranks #4 (4.9% 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 This page	13,297	$537,331
5	DQ	Daqo New Energy Corp.	24,326	$517,414
6	AEHR	Aehr Test Systems	12,758	$473,066
7	ATOM	Atomera Inc	83,116	$316,671
8	KLAC	Kla Corp	1,713	$252,223

14 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$537,331	13,297	-53.2%	Shares	Sole	2026-05-13
2025-09-30	$651,619	28,393	+32.8%	Shares	Sole	2025-11-12
2025-06-30	$402,660	21,384	+14156.0%	Shares	Sole	2025-08-14
2025-03-31	$3,114	150	-51.1%	Shares	Sole	2025-05-14
2024-09-30	$7,601	307	-89.6%	Shares	Sole	2024-11-14
2022-12-31	$49,884	2,964	-81.0%	Shares	Sole	2023-02-09
2022-03-31	$265,224	15,629	+161.4%	Shares	Sole	2022-05-12
2021-09-30	$81,480	5,978	+596.7%	Shares	Sole	2021-11-12
2021-06-30	$11,334	858	-76.3%	Shares	Sole	2021-08-10
2021-03-31	$46,591	3,623	+49.5%	Shares	Sole	2021-05-12
2020-12-31	$27,040	2,423	+49.3%	Shares	Sole	2021-02-10
2020-09-30	$16,165	1,623	+14.1%	Shares	Sole	2020-11-12
2020-06-30	$15,837	1,423	-63.3%	Shares	Sole	2020-08-13
2020-03-31	$39,757	3,875	—	Shares	Sole	2020-05-13
No filing history on record for this holder in this stock.