Position history for WESTFIELD CAPITAL MANAGEMENT CO LP's holdings in MKS INC.
WESTFIELD CAPITAL MANAGEMENT CO LP holds 1M shares of MKSI (MKS INC.), worth $240.6M as of 2026-Q1. The position was increased (+24.6% shares). MKSI represents 1.0% of WESTFIELD CAPITAL MANAGEMENT CO LP's portfolio.
Current Value
$240.6M
Current Shares
1M
Total Value Change
+$237.4M
Total Shares Change
+1M
Other major holders of MKSI: BNP PARIBAS FINANCIAL MARKETS, UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
Increased |
| 1M |
+24.6% |
| $240.6M |
| 1.0% |
| $232.56 |
59 |
| 2025-Q4 | Increased | 839,773 | +159.7% | $134.2M | 0.6% | $161.82 | 69 |
| 2025-Q3 | New | 323,364 | - | $40M | 0.2% | $121.95 | 48 |
| 2024-Q4 | Exited | 0 | -100.0% | $0 | 0.0% | $103.20 | 0 |
| 2024-Q3 | Unchanged | 24,100 | 0.0% | $2.6M | 0.0% | $109.18 | 0 |
| 2024-Q2 | Decreased | 24,100 | -96.1% | $3.1M | 0.0% | $129.01 | 0 |