Position in MKSI
as of Jun 30, 2026
· filed Aug 12, 2026
Position Value
$2,638,108
+$2,499,369 QoQ
Shares Held
5,931
+242.6% QoQ
Ownership
0.009%
of shares outstanding
% of Portfolio
0.08%
of 13F equity value
Holder Rank
#314
of 773 holders
Holding Since
Dec 2020
10 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in MKSI Over Time
Shares Held
Position Value (USD)
Position in Scientific & Technical Instruments
Technology · as of Jun 30, 2026SIMPLEX TRADING, LLC holds $23,150,058 across 13 Scientific & Technical Instruments names. MKSI ranks #3 (11.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | COHR |
Coherent Corp.
|
26,782 | $10,564,695 | |
| 2 | ESE |
Esco Technologies Inc
|
10,944 | $3,830,837 | |
| 3 | MKSI |
Mks Inc
This page
|
5,931 | $2,638,108 | |
| 4 | ITRN |
Ituran Location & Control Ltd.
|
38,435 | $2,344,919 | |
| 5 | VPG |
Vishay Precision Group, Inc.
|
7,850 | $1,176,793 | |
| 6 | NOVT |
Novanta Inc
|
5,780 | $937,747 | |
| 7 | GRMN |
Garmin Ltd
|
2,865 | $680,552 | |
| 8 | CGNX |
Cognex Corp
|
6,198 | $448,859 |
All Filings in MKSI
Export CSV
10 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $2,638,108 | 5,931 | Shares | Sole | 2026-08-12 | |
| 2025-03-31 | $138,739 | 1,731 | Shares | Sole | 2025-05-12 | |
| 2024-09-30 | $439,840 | 4,046 | Shares | Sole | 2024-11-08 | |
| 2024-06-30 | $409,629 | 3,137 | Shares | Sole | 2024-07-25 | |
| 2024-03-31 | $277,305 | 2,085 | Shares | Sole | 2024-04-25 | |
| 2022-03-31 | $63,000 | 420 | Shares | Sole | 2022-05-02 | |
| 2021-09-30 | $170,830 | 1,132 | Shares | Sole | 2021-10-28 | |
| 2021-06-30 | $76,874 | 432 | Shares | Sole | 2021-08-12 | |
| 2021-03-31 | $180,599 | 974 | Shares | Sole | 2021-04-26 | |
| 2020-12-31 | $49,798 | 331 | Shares | Sole | 2021-02-02 | |
| No filing history on record for this holder in this stock. | ||||||