Latest Mountaineer Partners Management, LLC Stock Portfolio

Mountaineer Partners Management, LLC Performance:

2025 Q4: 17.82%YTD: 32.01%2024: -7.99%

Performance for 2025 Q4 is 17.82%, and YTD is 32.01%, and 2024 is -7.99%.

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

On 2026-02-13, the fund reported it's updated stock portfolio. In the 13F Holdings report, Mountaineer Partners Management, LLC reported an equity portfolio of $178.7 Millions as of 31 Dec, 2025.

The top stock holdings of Mountaineer Partners Management, LLC are CENX, HBM, ATI. The fund has invested 13.3% of it's portfolio in CENTURY ALUM CO and 8.7% of portfolio in HUDBAY MINERALS INC.

The fund managers got completely rid off EVERUS CONSTR GROUP, ENTEGRIS INC (ENTG) and VISHAY INTERTECHNOLOGY INC (VSH) stocks. They significantly reduced their stock positions in ALCOA CORP (AA), CONSTELLIUM SE (CSTM) and HUDBAY MINERALS INC (HBM). Mountaineer Partners Management, LLC opened new stock positions in SENSIENT TECHNOLOGIES CORP (SXT), FRONTIER GROUP HLDGS INC (ULCC) and CAMECO CORP (CCJ). The fund showed a lot of confidence in some stocks as they added substantially to D R HORTON INC (DHI), BUILDERS FIRSTSOURCE INC (BLDR) and KIRBY CORP (KEX).

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

Our best estimate is that Mountaineer Partners Management, LLC made a return of 17.82% in the last quarter. In trailing 12 months, it's portfolio return was 32.01%.

Performance
S&P 500

New Buys

Ticker	$ Bought
sensient technologies corp	11,000,600
frontier group hldgs inc	4,490,400
cameco corp	3,881,370

New stocks bought by Mountaineer Partners Management, LLC

Additions

Ticker	% Inc.
d r horton inc	133
builders firstsource inc	54.86
kirby corp	33.64
standardaero inc	26.41
san juan basin rty tr	1.85

Additions to existing portfolio by Mountaineer Partners Management, LLC

Reductions

Ticker	% Reduced
alcoa corp	-18.42
constellium se	-18.27
hudbay minerals inc	-17.6
ati inc	-10.49
carpenter technology corp	-10.18
freeport-mcmoran inc	-9.43
century alum co	-7.95
nexgen energy ltd	-4.69

Mountaineer Partners Management, LLC reduced stake in above stock

Sold off

Ticker	$ Sold
vishay intertechnology inc	-11,355,300
uranium energy corp	-4,281,500
everus constr group	-14,564,100
entegris inc	-11,394,200

Mountaineer Partners Management, LLC got rid off the above stocks

Sector Distribution

Mountaineer Partners Management, LLC has about 34.3% of it's holdings in Basic Materials sector.

Sector	%
Basic Materials	34.3
Others	32.4
Industrials	28.1
Consumer Cyclical	5.2

Market Cap. Distribution

Mountaineer Partners Management, LLC has about 33% of it's portfolio invested in the large-cap and mega-cap stocks.

Category	%
LARGE-CAP	33
UNALLOCATED	32.4
MID-CAP	32.1
SMALL-CAP	2.5

Stocks belong to which Index?

About 56.7% of the stocks held by Mountaineer Partners Management, LLC either belong to S&P 500 or RUSSELL 2000 index.

Index	%
RUSSELL 2000	43.9
Others	43.3
S&P 500	12.8

Top 5 Winners (%)		%
AA	alcoa corp	55.9 %
ATI	ati inc	38.9 %
CENX	century alum co	32.1 %
HBM	hudbay minerals inc	28.2 %
FCX	freeport-mcmoran inc	28.1 %

Top 5 Winners ($)		$
CENX	century alum co	6.2 M
AA	alcoa corp	5.5 M
ATI	ati inc	4.6 M
HBM	hudbay minerals inc	4.1 M
FCX	freeport-mcmoran inc	3.2 M

Top 5 Losers (%)		%
BLDR	builders firstsource inc	-12.8 %
DHI	d r horton inc	-11.2 %
SJT	san juan basin rty tr	-6.9 %

Top 5 Losers ($)		$
BLDR	builders firstsource inc	-1.4 M
DHI	d r horton inc	-1.2 M
SJT	san juan basin rty tr	-0.3 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 17 stocks in it's portfolio. About 76.2% 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.

Last Reported on: 13 Feb, 2026

Ticker	Namesorted ascending	% Portfolio	Shares Held	$ Value	Type	% Change
AA	alcoa corp	7.20	241,994	12,859,600	reduced	-18.42

AMBP	ardagh metal packaging s a	3.37	1,469,480	6,024,870	reduced	-4.49

ATI	ati inc	8.28	128,909	14,793,600	reduced	-10.49

BLDR	builders firstsource inc	5.42	94,091	9,681,020	added	54.86

CCJ	cameco corp	2.17	42,424	3,881,370	new

CENX	century alum co	13.34	608,475	23,840,000	reduced	-7.95

CRS	carpenter technology corp	6.46	36,690	11,551,500	reduced	-10.18

CSTM	constellium se	7.19	681,464	12,845,600	reduced	-18.27

DHI	d r horton inc	5.24	65,004	9,362,530	added	133

ENTG	entegris inc	0.00	0.00	0.00	sold off	-100

FCX	freeport-mcmoran inc	7.57	266,327	13,526,700	reduced	-9.43

HBM	hudbay minerals inc	8.74	787,247	15,626,900	reduced	-17.6

KEX	kirby corp	5.39	87,444	9,634,580	added	33.64

NXE	nexgen energy ltd	2.77	538,042	4,949,990	reduced	-4.69

SJT	san juan basin rty tr	2.30	732,351	4,115,810	added	1.85

SXT	sensient technologies corp	6.16	117,090	11,000,600	new

UEC	uranium energy corp	0.00	0.00	0.00	sold off	-100

ULCC	frontier group hldgs inc	2.51	953,375	4,490,400	new

VSH	vishay intertechnology inc	0.00	0.00	0.00	sold off	-100

	standardaero inc	5.90	367,498	10,539,800	added	26.41