Position in ATOM
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$2,468
-$5,103 QoQ
Shares Held
648
-81.1% QoQ
Ownership
0.002%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Sep 2020
19 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in ATOM Over Time
Shares Held
Position Value (USD)
Position in Semiconductor Equipment & Materials
Technology · as of Jun 30, 2026SIMPLEX TRADING, LLC holds $115,572,420 across 22 Semiconductor Equipment & Materials names.
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | KLAC |
Kla Corp
|
123,044 | $37,123,605 | |
| 2 | ASML |
Asml Holding NV
|
16,406 | $32,638,750 | |
| 3 | AMAT |
Applied Materials Inc /De
|
32,303 | $23,355,069 | |
| 4 | ACMR |
ACM Research, Inc.
|
44,316 | $5,623,257 | |
| 5 | AMKR |
Amkor Technology, Inc.
|
49,051 | $4,229,667 | |
| 6 | ENTG |
Entegris Inc
|
13,273 | $2,387,281 | |
| 7 | TER |
Teradyne, Inc
|
3,406 | $1,647,959 | |
| 8 | VECO |
Veeco Instruments Inc
|
20,077 | $1,521,836 |
All Filings in ATOM
Export CSV
19 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $2,468 | 648 | Shares | Sole | 2026-05-14 | |
| 2025-12-31 | $7,571 | 3,426 | Shares | Sole | 2026-02-11 | |
| 2025-09-30 | $166,687 | 37,712 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $130,742 | 25,941 | Shares | Sole | 2025-08-05 | |
| 2025-03-31 | $168,000 | 42,000 | Shares | Sole | 2025-05-12 | |
| 2024-12-31 | $871,914 | 75,165 | Shares | Sole | 2025-02-11 | |
| 2024-09-30 | $70,047 | 26,634 | Shares | Sole | 2024-11-08 | |
| 2024-06-30 | $205,313 | 53,888 | Shares | Sole | 2024-07-25 | |
| 2024-03-31 | $312,182 | 50,679 | Shares | Sole | 2024-04-25 | |
| 2023-12-31 | $72,609 | 10,358 | Shares | Sole | 2024-02-02 | |
| 2023-09-30 | $183,299 | 29,281 | Shares | Sole | 2023-11-01 | |
| 2023-06-30 | $184,722 | 21,063 | Shares | Sole | 2023-08-04 | |
| 2023-03-31 | $80,433 | 12,627 | Shares | Sole | 2023-04-27 | |
| 2022-12-31 | $235,650 | 37,886 | Shares | Sole | 2023-02-02 | |
| 2022-09-30 | $164,227 | 16,212 | Shares | Sole | 2022-11-04 | |
| 2022-06-30 | $194,353 | 20,720 | Shares | Sole | 2022-08-03 | |
| 2022-03-31 | $11,349 | 869 | Shares | Sole | 2022-05-02 | |
| 2020-12-31 | $75,703 | 4,705 | Shares | Sole | 2021-02-02 | |
| 2020-09-30 | $283,048 | 27,086 | Shares | Sole | 2020-10-14 | |
| No filing history on record for this holder in this stock. | ||||||