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Latest Mountaineer Partners Management, LLC Stock Portfolio

$201Million | No. of Holdings #16

Mountaineer Partners Management, LLC Performance

2026 Q1+13.18%
YTD+13.18%
2025+32.01%

About Mountaineer Partners Management, LLC and 13F Hedge Fund Stock Holdings

On 2026-05-15, the fund reported it's updated stock portfolio. In the 13F Holdings report, Mountaineer Partners Management, LLC reported an equity portfolio of $201.3 Millions as of 31 Mar, 2026. <br><br> The top stock holdings of Mountaineer Partners Management, LLC are CENX, CSTM, AA. The fund has invested 17% of it's portfolio in CENTURY ALUM CO and 8% of portfolio in CONSTELLIUM SE. <br><br> The fund managers got completely rid off NEXGEN ENERGY LTD (NXE) and SAN JUAN BASIN RTY TR (SJT) stocks. They significantly reduced their stock positions in ATI INC (ATI), HUDBAY MINERALS INC (HBM) and FREEPORT MCMORAN INC (FCX). Mountaineer Partners Management, LLC opened new stock positions in HARMONY GOLD MNG LTD (HMY). The fund showed a lot of confidence in some stocks as they added substantially to SENSIENT TECHNOLOGIES CORP (SXT), ARDAGH METAL PACKAGING S A (AMBP) and STANDARDAERO INC.
Mountaineer Partners Management, LLC Equity Portfolio Value
Last Reported on: 15 May, 2026
$201Million
  as of May 15, 2026

Mountaineer Partners Management, LLC Annual Return Estimates Vs S&P 500

Our best estimate is that Mountaineer Partners Management, LLC made a return of 13.18% in the last quarter. In trailing 12 months, it's portfolio return was 65.93%.
  • Performance
  • S&P 500

New Buys

Ticker$ Bought
harmony gold mng ltd10,247,700
New stocks bought by Mountaineer Partners Management, LLC

Additions

Ticker% Inc.
sensient technologies corp33.73
ardagh metal packaging s a27.81
standardaero inc10.87
builders firstsource inc4.37
d r horton inc2.36
kirby corp1.8
Additions to existing portfolio by Mountaineer Partners Management, LLC

Reductions

Ticker% Reduced
ati inc-28.8
hudbay minerals inc-10.32
freeport mcmoran inc-9.52
century alum co-4.02
alcoa corp-3.43
constellium se-3.37
carpenter technology corp-2.07
Mountaineer Partners Management, LLC reduced stake in above stock

Sold off

Ticker$ Sold
san juan basin rty tr-4,115,810
nexgen energy ltd-4,949,990
Mountaineer Partners Management, LLC got rid off the above stocks

Sector Distribution

Mountaineer Partners Management, LLC has about 38.5% of it's holdings in Basic Materials sector.

  • Basic Materials
  • Others
  • Industrials
  • Consumer Cyclical
Sector%
Basic Materials38.5
Others31.8
Industrials25.2
Consumer Cyclical4.5

Market Cap. Distribution

Mountaineer Partners Management, LLC has about 29.3% of it's portfolio invested in the large-cap and mega-cap stocks.

  • MID-CAP
  • UNALLOCATED
  • LARGE-CAP
  • SMALL-CAP
Category%
MID-CAP37.3
UNALLOCATED31.8
LARGE-CAP29.3
SMALL-CAP1.7

Stocks belong to which Index?

About 58.7% of the stocks held by Mountaineer Partners Management, LLC either belong to S&P 500 or RUSSELL 2000 index.

  • RUSSELL 2000
  • Others
  • S&P 500
Index%
RUSSELL 200047.1
Others41.3
S&P 50011.6
Top 5 Winners (%)%
CENX
century alum co
48.8 %
CSTM
constellium se
29.9 %
CRS
carpenter technology corp
24.9 %
AA
alcoa corp
24.4 %
ATI
ati inc
22.9 %
Top 5 Winners ($)$
CENX
century alum co
11.6 M
CSTM
constellium se
3.8 M
ATI
ati inc
3.4 M
AA
alcoa corp
3.1 M
CRS
carpenter technology corp
2.9 M
Top 5 Losers (%)%
ULCC
frontier group hldgs inc
-25.1 %
BLDR
builders firstsource inc
-19.6 %
standardaero inc
-9.5 %
SXT
sensient technologies corp
-7.1 %
DHI
d r horton inc
-4.7 %
Top 5 Losers ($)$
BLDR
builders firstsource inc
-2.0 M
ULCC
frontier group hldgs inc
-1.1 M
standardaero inc
-1.1 M
SXT
sensient technologies corp
-1.0 M
DHI
d r horton inc
-0.4 M

Mountaineer Partners Management, LLC Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of Mountaineer Partners Management, LLC

Mountaineer Partners Management, LLC has 16 stocks in it's portfolio. About 78.6% of the portfolio is in top 10 stocks. BLDR proved to be the most loss making stock for the portfolio. CENX was the most profitable stock for Mountaineer Partners Management, LLC last quarter.

$201.32MTotal Value
18.00Positions
15 May, 2026Last Reported
Current holdings of Current Stock Holdings of Mountaineer Partners Management, LLC, last reported on 15 May, 2026. Select a row with a linked ticker to view its historical trend.
ExpandHoldingsorted ascending% PortfolioShares Held$ Value% Change
AMBP
Ardagh Metal Packaging S A

Ardagh Metal Packaging S A

AMBP
Mountaineer Partners Management, LLC's holding in Ardagh Metal Packaging S A over time
3.78%1,878,080
$7.61M
3.78%
increased 27.81 percentadded
CCJ
Cameco Corp

Cameco Corp

CCJ
Mountaineer Partners Management, LLC's holding in Cameco Corp over time
2.29%42,424
$4.61M
2.29%
unchanged 0 percentunchanged
CSTM
Constellium Se

Constellium Se

CSTM
Mountaineer Partners Management, LLC's holding in Constellium Se over time
8.04%658,490
$16.19M
8.04%
decreased 3.37 percentreduced
HBM
Hudbay Minerals Inc

Hudbay Minerals Inc

HBM
Mountaineer Partners Management, LLC's holding in Hudbay Minerals Inc over time
7.33%706,040
$14.76M
7.33%
decreased 10.32 percentreduced
HMY
Harmony Gold Mng Ltd

Harmony Gold Mng Ltd

HMY
Mountaineer Partners Management, LLC's holding in Harmony Gold Mng Ltd over time
5.09%666,735
$10.25M
5.09%
new position
NXE
Nexgen Energy Ltd

Nexgen Energy Ltd

NXE
Mountaineer Partners Management, LLC's holding in Nexgen Energy Ltd over time
0%0.00
$0.00
0%
decreased 100 percentsold off
SJT
San Juan Basin Rty Tr

San Juan Basin Rty Tr

SJT
Mountaineer Partners Management, LLC's holding in San Juan Basin Rty Tr over time
0%0.00
$0.00
0%
decreased 100 percentsold off
Com
Standardaero Inc

Standardaero Inc

Mountaineer Partners Management, LLC's holding in Standardaero Inc over time
5.23%407,435
$10.52M
5.23%
increased 10.87 percentadded