Mountaineer Partners Management, LLC Diversified Active

Name: Mountaineer Partners Management, LLC Q3 2025 13F Filing | 13F Explorer
Creator: Mountaineer Partners Management, LLC
Published: 2025-11-14

Location: New York, NY

CIK: 0001730532 · Show all filings

Period: Q3 2025 (← Previous) (Next →)

Filing Date: Nov 14, 2025

Total Value: $172M (100.0% shares, 0.0% debt)

Holdings (18)

CENX CENTURY ALUM CO 11.3%

Value $19.41M Shares 661,043 Est. Cost $9.34 Unrealized +142.7%

ECG EVERUS CONSTR GROUP 8.5%

Value $14.56M Shares 169,844 Est. Cost $60.35 Unrealized +23.1%

HBM HUDBAY MINERALS INC 8.4%

Value $14.48M Shares 955,419 Est. Cost $5.63 Unrealized +103.3%

CSTM CONSTELLIUM SE 7.2%

Value $12.41M Shares 833,776 Est. Cost $12.99 Unrealized +10.1%

ATI ATI INC 6.8%

Value $11.71M Shares 144,020 Est. Cost $48.58 Unrealized +66.8%

FCX FREEPORT-MCMORAN INC 6.7%

Value $11.53M Shares 294,049 Est. Cost $36.15 Unrealized +19.5%

ENTG ENTEGRIS INC 6.6%

Value $11.39M Shares 123,234 Est. Cost $90.07 Unrealized -5.7%

VSH VISHAY INTERTECHNOLOGY INC 6.6%

Value $11.36M Shares 742,177 Est. Cost $17.39 Unrealized -9.9%

CRS CARPENTER TECHNOLOGY CORP 5.8%

Value $10.03M Shares 40,849 Est. Cost $218.27 Unrealized +16.9%

AA ALCOA CORP 5.7%

Value $9.757M Shares 296,642 Est. Cost $40.27 Unrealized -23.1%

SARO STANDARDAERO INC 4.6%

Value $7.934M Shares 290,730 Est. Cost $28.05 Unrealized +0.0%

BLDR BUILDERS FIRSTSOURCE INC 4.3%

Value $7.367M Shares 60,759 Est. Cost $161.62 Unrealized -17.9%

AMBP ARDAGH METAL PACKAGING S A 3.6%

Value $6.139M Shares 1,538,484 Est. Cost $3.31 Unrealized +18.9%

KEX KIRBY CORP 3.2%

Value $5.46M Shares 65,431 Est. Cost $104.91 Unrealized -4.2%

NXE NEXGEN ENERGY LTD 2.9%

Value $5.052M Shares 564,507 Est. Cost $4.88 Unrealized +51.2%

DHI D R HORTON INC 2.7%

Value $4.724M Shares 27,876 Est. Cost $156.63 Unrealized 0.0%

SJT SAN JUAN BASIN RTY TR 2.5%

Value $4.343M Shares 719,054 Est. Cost $5.26 Unrealized —

UEC URANIUM ENERGY CORP 2.5%

Value $4.282M Shares 320,952 Est. Cost $10.01 Unrealized 0.0%

Ticker	Issuer	Shares	Value	%	Est. Cost	Unrealized	Class	CUSIP
CENX	CENTURY ALUM CO	661,043	$19.41M	11.3%	$9.34	+142.7%	COM	156431108
ECG	EVERUS CONSTR GROUP	169,844	$14.56M	8.5%	$60.35	+23.1%	COM	300426103
HBM	HUDBAY MINERALS INC	955,419	$14.48M	8.4%	$5.63	+103.3%	COM	443628102
CSTM	CONSTELLIUM SE	833,776	$12.41M	7.2%	$12.99	+10.1%	CL A SHS	F21107101
ATI	ATI INC	144,020	$11.71M	6.8%	$48.58	+66.8%	COM	01741R102
FCX	FREEPORT-MCMORAN INC	294,049	$11.53M	6.7%	$36.15	+19.5%	CL B	35671D857
ENTG	ENTEGRIS INC	123,234	$11.39M	6.6%	$90.07	-5.7%	COM	29362U104
VSH	VISHAY INTERTECHNOLOGY INC	742,177	$11.36M	6.6%	$17.39	-9.9%	COM	928298108
CRS	CARPENTER TECHNOLOGY CORP	40,849	$10.03M	5.8%	$218.27	+16.9%	COM	144285103
AA	ALCOA CORP	296,642	$9.757M	5.7%	$40.27	-23.1%	COM	013872106
SARO	STANDARDAERO INC	290,730	$7.934M	4.6%	$28.05	+0.0%	COM	85423L103
BLDR	BUILDERS FIRSTSOURCE INC	60,759	$7.367M	4.3%	$161.62	-17.9%	COM	12008R107
AMBP	ARDAGH METAL PACKAGING S A	1,538,484	$6.139M	3.6%	$3.31	+18.9%	SHS	L02235106
KEX	KIRBY CORP	65,431	$5.46M	3.2%	$104.91	-4.2%	COM	497266106
NXE	NEXGEN ENERGY LTD	564,507	$5.052M	2.9%	$4.88	+51.2%	COM	65340P106
DHI	D R HORTON INC	27,876	$4.724M	2.7%	$156.63	0.0%	COM	23331A109
SJT	SAN JUAN BASIN RTY TR	719,054	$4.343M	2.5%	$5.26	—	UNIT BEN INT	798241105
UEC	URANIUM ENERGY CORP	320,952	$4.282M	2.5%	$10.01	0.0%	COM	916896103