Mountaineer Partners Management, LLC
Hedge Fund • Long/Short
Mountaineer Partners Management, LLC is a Long/Short Hedge Fund based in New York, NY led by Mark M Lee, reporting $187.4M in AUM as of Q3 2025 with 39% Basic Materials concentration and 74% concentrated in top 10 holdings.
Managing PartnerMark M Lee
- Portfolio Value
- $171.9M
- Positions
- 18
- Top Holding
- CENX at 11.29%
- Last Reported
- Q3 2025
Top Holdings
Largest long holdings in Mountaineer Partners Management, LLC's portfolio (73.7% of total portfolio)
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| Holding | Sector | Position | Weight | Traded | Ownership |
|---|---|---|---|---|---|
Aluminum Basic Materials | $19.4M | 11.29% | -$1.3M Sold | 0.71% 661.0K shares | |
Unknown Unknown | $14.6M | 8.47% | -$3.1M Sold | 0.33% 169.8K shares | |
Copper Basic Materials | $14.5M | 8.42% | -$2.6M Sold | 0.24% 955.4K shares | |
Aluminum Basic Materials | $12.4M | 7.22% | -$177.2K Sold | 0.60% 833.8K shares | |
Manufacturing - Metal Fabrication Industrials | $11.7M | 6.81% | +$1.7M Bought | 0.10% 144.0K shares | |
Copper Basic Materials | $11.5M | 6.71% | +$1.6M Bought | 0.02% 294.0K shares | |
Semiconductors Technology | $11.4M | 6.63% | -$277.0K Sold | 0.08% 123.2K shares | |
Semiconductors Technology | $11.4M | 6.60% | -$5.0K Sold | 0.55% 742.2K shares | |
Manufacturing - Metal Fabrication Industrials | $10.0M | 5.83% | +$212.9K Bought | 0.08% 40.8K shares | |
Aluminum Basic Materials | $9.8M | 5.67% | -$267.7K Sold | 0.11% 296.6K shares |
Changes
Portfolio activity, position movements, and quarter-over-quarter changes in Mountaineer Partners Management, LLC's latest filing
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Market Value
Q/Q Change
Net Flows % of MV
Turnover Ratio
New Purchases
Added To
Sold Out Of
Reduced Holdings
Increased Positions
| Position | Shares Δ |
|---|---|
New | |
+17.12% | |
+16.24% | |
+2.17% |
Decreased Positions
| Position | Shares Δ |
|---|---|
-17.64% | |
-15.03% | |
-6.25% | |
-2.73% | |
-2.67% |
Analytics
Portfolio insights and performance metrics for Mountaineer Partners Management, LLC
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