Position in ONTO
as of Jun 30, 2026
· filed Aug 12, 2026
Position Value
$113,301,496
+$46,251,809 QoQ
Shares Held
299,383
-8.4% QoQ
Ownership
0.610%
of shares outstanding
% of Portfolio
0.37%
of 13F equity value
Holder Rank
#39
of 688 holders
Holding Since
Mar 2023
9 quarters on record
Voting authority
Sole 93%
Shared 0%
None 7%
Common Shares in ONTO Over Time
Shares Held
Position Value (USD)
Position in Semiconductor Equipment & Materials
Technology · as of Jun 30, 2026WESTFIELD CAPITAL MANAGEMENT CO LP holds $628,046,750 across 6 Semiconductor Equipment & Materials names. ONTO ranks #4 (18.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | AMAT |
Applied Materials Inc /De
|
205,592 | $148,643,016 | |
| 2 | LRCX |
Lam Research Corp
|
285,614 | $123,765,114 | |
| 3 | ASML |
Asml Holding NV
|
57,430 | $114,253,533 | |
| 4 | ONTO |
Onto Innovation Inc.
This page
|
299,383 | $113,301,496 | |
| 5 | TER |
Teradyne, Inc
|
136,491 | $66,039,805 | |
| 6 | ENTG |
Entegris Inc
|
344,956 | $62,043,786 |
All Filings in ONTO
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9 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $113,301,496 | 299,383 | Shares | Sole | 2026-08-12 | |
| 2026-03-31 | $67,049,687 | 326,960 | Shares | Sole | 2026-05-11 | |
| 2025-12-31 | $76,259,324 | 483,082 | Shares | Sole | 2026-02-11 | |
| 2025-09-30 | $61,318,766 | 474,530 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $35,432,889 | 351,064 | Shares | Sole | 2025-08-12 | |
| 2025-03-31 | $24,700,698 | 203,566 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $46,698,100 | 280,183 | Shares | Sole | 2025-02-11 | |
| 2023-06-30 | $26,345,397 | 226,199 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $26,540,902 | 302,013 | Shares | Sole | 2023-05-12 | |
| No filing history on record for this holder in this stock. | ||||||