Position in ONTO
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$5,953,182
-$830,062 QoQ
Shares Held
29,030
-32.4% QoQ
Ownership
0.058%
of shares outstanding
% of Portfolio
0.23%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 2023
7 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in ONTO Over Time
Shares Held
Position Value (USD)
Position in Semiconductor Equipment & Materials
Technology · as of Mar 31, 2026CASTLEARK MANAGEMENT LLC holds $101,940,023 across 7 Semiconductor Equipment & Materials names. ONTO ranks #5 (5.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | LRCX |
Lam Research Corp
|
336,740 | $71,947,868 | |
| 2 | KLIC |
Kulicke & Soffa Industries Inc
|
106,380 | $6,991,293 | |
| 3 | IPGP |
Ipg Photonics Corp
|
60,456 | $6,927,653 | |
| 4 | UCTT |
Ultra Clean Holdings, Inc.
|
100,130 | $6,226,083 | |
| 5 | ONTO |
Onto Innovation Inc.
This page
|
29,030 | $5,953,182 | |
| 6 | CAMT |
Camtek Ltd
|
15,420 | $2,337,826 | |
| 7 | TER |
Teradyne, Inc
|
5,249 | $1,556,118 |
All Filings in ONTO
Export CSV
7 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $5,953,182 | 29,030 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $6,783,244 | 42,970 | Shares | Sole | 2026-02-13 | |
| 2024-06-30 | $5,879,816 | 26,780 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $7,377,199 | 40,740 | Shares | Sole | 2024-05-16 | |
| 2023-12-31 | $7,765,791 | 50,790 | Shares | Sole | 2024-02-15 | |
| 2023-09-30 | $6,483,116 | 50,840 | Shares | Sole | 2023-11-15 | |
| 2023-06-30 | $4,386,260 | 37,660 | Shares | Sole | 2023-08-16 | |
| No filing history on record for this holder in this stock. | ||||||