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MKSI
6 quarters

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

Quarter-by-Quarter History
QuarterActionSharesChangeValueWeightPriceConviction
2026-Q1
Latest
Increased
1M
+24.6%
$240.6M1.0%$232.56
59
2025-Q4
Increased
839,773
+159.7%
$134.2M0.6%$161.82
69
2025-Q3
New
323,364
-
$40M0.2%$121.95
48
2024-Q4
Exited
0
-100.0%
$00.0%$103.20
0
2024-Q3
Unchanged
24,100
0.0%
$2.6M0.0%$109.18
0
2024-Q2
Decreased
24,100
-96.1%
$3.1M0.0%$129.01
0

Other major holders of MKSI: BlackRock, Inc., VANGUARD GROUP INC, PRICE T ROWE ASSOCIATES INC /MD/

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