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Mountaineer Partners Management’s Entegris ENTG Stock Holding History

Mountaineer Partners Management’s Portfolio ENTG Stock Details ENTG Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-123,234
Closed -$11.4M – 18
2025
Q3 		$11.4M Sell
123,234
-2,996
-2% -$255K 6.63% 7
2025
Q2 		$10.2M Buy
126,230
+27,701
+28% +$2.1M 6.73% 9
2025
Q1 		$8.62M Sell
98,529
-1,331
-1% -$134K 8.25% 6
2024
Q4 		$9.89M Buy
99,860
+1,712
+2% +$181K 7.24% 4
2024
Q3 		$11M Buy
98,148
+30,618
+45% +$3.63M 6.89% 4
2024
Q2 		$9.14M Sell
67,530
-4,875
-7% -$644K 4.76% 12
2024
Q1 		$10.2M Sell
72,405
-43,600
-38% -$5.57M 4.7% 10
2023
Q4 		$13.9M Sell
116,005
-635
-0.5% -$64.4K 7.06% 3
2023
Q3 		$11M Buy
116,640
+2,142
+2% +$214K 7.02% 3
2023
Q2 		$12.7M Buy
114,498
+31,902
+39% +$2.91M 7% 3
2023
Q1 		$6.77M Buy
+82,596
New +$6.69M 4.92% 10

Other funds holding ENTG

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Barrow, Hanley, Mewhinney & Strauss
Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $30.5B AUM 29.95% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $187B AUM 18.48% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
LCOV
London Company of Virginia Richmond, Virginia $16.2B AUM 17.5% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return

Mountaineer Partners Management's ENTG Position: Q4 2025 in Review

Mountaineer Partners Management sold out of Entegris (ENTG) in Q4 2025, closing a stake of 123,234 shares — an estimated $11.4M sold.

Mountaineer Partners Management first reported a position in ENTG in Q1 2023 and held it in 11 quarters. The position peaked at $13.9M in Q4 2023. 586 funds tracked by Wall St. Rank hold ENTG as of Q4 2025.

  • Mountaineer Partners Management reported no remaining Entegris position as of Q4 2025 after selling out during the quarter.
  • Mountaineer Partners Management sold 123,234 Entegris shares in Q4 2025, an estimated $11.4M.
  • Mountaineer Partners Management first reported a position in Entegris in Q1 2023 and held it in 11 quarters.
  • Mountaineer Partners Management's Entegris position peaked at $13.9M in Q4 2023.
  • 586 funds tracked by Wall St. Rank held Entegris as of Q4 2025.

Based on Mountaineer Partners Management's 13F filing for Q4 2025, filed 13 Feb 2026.