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Old West Investment Management’s MKS Inc MKSI Stock Holding History

Old West Investment Management’s Portfolio MKSI Stock Details MKSI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$2.02M Sell
8,790
-7,560
-46% -$1.71M 0.22% 85
2025
Q4 		$2.61M Buy
16,350
+501
+3% +$74.3K 0.47% 50
2025
Q3 		$1.96M Buy
15,849
+9,055
+133% +$965K 0.45% 50
2025
Q2 		$675K Buy
+6,794
New +$552K 0.22% 48

Other funds holding MKSI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

Old West Investment Management's MKSI Position: Q1 2026 in Review

Old West Investment Management reduced its MKS Inc (MKSI) stake by 46% in Q1 2026, selling an estimated $1.71M and leaving 8,790 shares worth $2.02M. The position accounts for 0.22% of the portfolio, ranked #85.

Old West Investment Management first reported a position in MKSI in Q2 2025 and has held it in 4 quarters since. The position peaked at $2.61M in Q4 2025. 616 funds tracked by Wall St. Rank hold MKSI as of Q1 2026.

  • Old West Investment Management held 8,790 shares of MKS Inc worth $2.02M as of Q1 2026.
  • Old West Investment Management sold 7,560 MKS Inc shares in Q1 2026, an estimated $1.71M.
  • MKS Inc made up 0.22% of Old West Investment Management's portfolio in Q1 2026, its #85 holding.
  • Old West Investment Management first reported a position in MKS Inc in Q2 2025 and has held it in 4 quarters since.
  • Old West Investment Management's MKS Inc position peaked at $2.61M in Q4 2025.
  • 616 funds tracked by Wall St. Rank held MKS Inc as of Q1 2026.

Based on Old West Investment Management's 13F filing for Q1 2026, filed 12 May 2026.