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Harvey Partners’s MKS Inc MKSI Stock Holding History

Harvey Partners’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 		$55.9M Sell
243,396
-45,801
-16% -$10.4M 4.45% 3
2025
Q4 		$46.2M Buy
289,197
+197
+0.1% +$29.2K 4.1% 3
2025
Q3 		$35.8M Buy
289,000
+19,401
+7% +$2.07M 3.18% 10
2025
Q2 		$26.8M Buy
269,599
+8,599
+3% +$699K 2.63% 15
2025
Q1 		$20.9M Buy
261,000
+71,500
+38% +$7.22M 2.44% 17
2024
Q4 		$19.8M Buy
189,500
+19,500
+11% +$2.1M 2.2% 19
2024
Q3 		$18.5M Buy
170,000
+24,500
+17% +$2.91M 2.1% 22
2024
Q2 		$19M Sell
145,500
-9,500
-6% -$1.2M 2.28% 21
2024
Q1 		$20.6M Buy
155,000
+5,500
+4% +$639K 2.18% 21
2023
Q4 		$15.4M Sell
149,500
-15,000
-9% -$1.22M 1.75% 26
2023
Q3 		$14.2M Buy
164,500
+9,500
+6% +$926K 1.8% 27
2023
Q2 		$16.8M Buy
+155,000
New +$14.2M 2.05% 23

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

Harvey Partners's MKSI Position: Q1 2026 in Review

Harvey Partners reduced its MKS Inc (MKSI) stake by 16% in Q1 2026, selling an estimated $10.4M and leaving 243,396 shares worth $55.9M. The position accounts for 4.45% of the portfolio, ranked #3.

Harvey Partners first reported a position in MKSI in Q2 2023 and has held it in 12 quarters since. 615 funds tracked by Wall St. Rank hold MKSI as of Q1 2026.

  • Harvey Partners held 243,396 shares of MKS Inc worth $55.9M as of Q1 2026.
  • Harvey Partners sold 45,801 MKS Inc shares in Q1 2026, an estimated $10.4M.
  • MKS Inc made up 4.45% of Harvey Partners's portfolio in Q1 2026, its #3 holding.
  • Harvey Partners first reported a position in MKS Inc in Q2 2023 and has held it in 12 quarters since.
  • 615 funds tracked by Wall St. Rank held MKS Inc as of Q1 2026.

Based on Harvey Partners's 13F filing for Q1 2026, filed 15 May 2026.