WESTFIELD CAPITAL MANAGEMENT CO LP
Holdings in MKSI
Position Over Time
| Report Date | Value (USD) | Shares | Type | Discretion | Filed |
|---|---|---|---|---|---|
| 2025-12-31 | $134,195,725 | 839,773 | Shares | Sole | 2026-02-11 |
| 2025-09-30 | $40,022,762 | 323,364 | Shares | Sole | 2025-11-12 |
| 2024-09-30 | $2,619,911 | 24,100 | Shares | Sole | 2024-11-12 |
| 2024-06-30 | $3,146,978 | 24,100 | Shares | Sole | 2024-08-14 |
| 2024-03-31 | $82,468,379 | 620,063 | Shares | Sole | 2024-05-10 |
| 2023-12-31 | $60,663,982 | 589,715 | Shares | Sole | 2024-02-09 |
| 2022-09-30 | $63,504,460 | 768,447 | Shares | Sole | 2022-11-14 |
| 2022-06-30 | $72,575,830 | 707,160 | Shares | Sole | 2022-08-12 |
| 2022-03-31 | $86,496,450 | 576,643 | Shares | Sole | 2022-05-16 |
| 2021-09-30 | $83,599,914 | 553,972 | Shares | Sole | 2021-11-12 |
| 2021-06-30 | $63,706,633 | 358,003 | Shares | Sole | 2021-08-10 |
| 2021-03-31 | $60,160,816 | 324,457 | Shares | Sole | 2021-05-14 |
| 2020-12-31 | $49,456,676 | 328,725 | Shares | Sole | 2021-02-12 |
| 2020-09-30 | $31,785,493 | 290,996 | Shares | Sole | 2020-11-13 |
| 2020-06-30 | $23,172,867 | 204,635 | Shares | Sole | 2020-08-13 |
| 2020-03-31 | $20,768,935 | 254,990 | Shares | Sole | 2020-05-14 |