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GROUP ONE TRADING LLC

Position in ASYS — Amtech Systems Inc

CIK 932540 CHICAGO, IL

Position in ASYS

as of Mar 31, 2026 · filed May 13, 2026
Position Value
$38,672
-$56,067 QoQ
Shares Held
3,311
-56.1% QoQ
Ownership
0.023%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Sep 2020
8 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in ASYS Over Time

Shares Held

Position Value (USD)

Position in Semiconductor Equipment & Materials

Technology · as of Mar 31, 2026

GROUP ONE TRADING LLC holds $13,125,806 across 15 Semiconductor Equipment & Materials names. ASYS ranks #11 (0.3% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in ASYS

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8 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $38,672 3,311
2025-12-31 $94,739 7,549
2025-09-30 $18,742 2,024
2024-03-31 $5,691 1,052
2023-12-31 $8,618 2,052
2021-09-30 $25,191 2,204
2021-03-31 $7,907 669
2020-09-30 $7,335 1,500