Mountaineer Partners Management, LLC

Q1 2026 13F-HR Holdings

Location
New York, NY
Holdings as of
3/31/2026
Date filed
5/15/2026
Form type
13F-HR
Num holdings
16
Total value ($000)
$201,324
Net value change ($000)
+22,599 (12.6%)
New positions
1
Sold out positions
2
Turnover %
9.6%
Sector allocation + QoQ delta (equities-only)
Prev filing: 2/13/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q4 2025
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
CENX 10,435 43.8%
HMY 10,248 NEW
CSTM 3,340 26.0%
AA 2,640 20.5%
CRS 2,610 22.6%
SXT 2,534 23.0%
KEX 2,194 22.8%
ARDAGH METAL PACKAGING S A 1,581 26.2%
CCJ 727 18.7%
FCX 637 4.7%
Top Reduces (Value $000, Stocks/ETFs)
NXE -4,950 -100.0%
SJT -4,116 -100.0%
BLDR -1,596 -16.5%
ATI -1,443 -9.8%
ULCC -1,125 -25.1%
HBM -871 -5.6%
DHI -232 -2.5%
SARO -16 -0.2%
Instrument mix + QoQ Δ (ex-options)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type