Mountaineer Partners Management, LLC
13F Reported Value
ⓘ$201.3M
Holdings
16
Latest Filing
2026-03-31
Filing Quarter
Q1 2026
Portfolio Overview
Mountaineer Partners Management, LLC disclosed 16 positions worth $201.3M in its Form 13F-HR for Q1 2026, led by $CENX (CENTURY ALUMINUM CO) at 17.0% of the equity portfolio, followed by $CSTM and $AA. During the quarter the fund opened 1 new position and exited 2 — including a new stake in $HMY and a full exit from $NXE. The portfolio is most concentrated in Materials (74.9% of disclosed assets). All figures are sourced directly from Mountaineer Partners Management, LLC’s Form 13F-HR filing with the SEC under CIK 1730532.
AI Fund Analysis
ConcentratingSector Allocation
AUM History
Top Equity Holdings by Value
Quarterly Activity — Q1 2026
Click any card to unlockTop Holdings
- 67.0#493
Quality
$34.3M583,997 sh - 69.7#353
Quality
$16.2M658,490 sh - 66.2#533
Quality
$15.5M233,687 sh - —
Quality
$14.8M706,040 sh - 73.1
Quality
$14.2M240,973 sh - 69.9
Quality
$14.2M35,929 sh - 57.3
Quality
$13.5M156,584 sh - 64.5
Quality
$13.4M91,784 sh - 64.1
Quality
$11.8M89,017 sh - 67.4
Quality
$10.5M407,435 sh
| Company | Quality | Value | Shares |
|---|---|---|---|
 CENTURY ALUMINUM CO$CENX | 67.0#493 | $34.3M | 583,997 |
 CONSTELLIUM SE$CSTM | 69.7#353 | $16.2M | 658,490 |
 Alcoa Corp$AA | 66.2#533 | $15.5M | 233,687 |
 Hudbay Minerals Inc.$HBM | — | $14.8M | 706,040 |
 FREEPORT-MCMORAN INC$FCX | 73.1 | $14.2M | 240,973 |
 CARPENTER TECHNOLOGY CORP$CRS | 69.9 | $14.2M | 35,929 |
 SENSIENT TECHNOLOGIES CORP$SXT | 57.3 | $13.5M | 156,584 |
 ATI INC$ATI | 64.5 | $13.4M | 91,784 |
 KIRBY CORP$KEX | 64.1 | $11.8M | 89,017 |
 StandardAero, Inc.$SARO | 67.4 | $10.5M | 407,435 |
Unlock AI quality scores for every holding
32-signal composite ranking on each of Mountaineer Partners Management, LLC's 16 positions.
Showing top 10 of 16 holdings.
Sector Allocation
Materials
$150.8M
Industrials
$42.5M
Consumer Discretionary
$8.1M
Full Holdings — Mountaineer Partners Management, LLC (Q1 2026)
All 16 disclosed positions from the latest Form 13F-HR, with quarter-over-quarter share changes and 13F Pro quality scores. Sourced from SEC EDGAR.
| # | Ticker | Company | Value | Weight | QoQ | Quality |
|---|---|---|---|---|---|---|
| 1 | $CENX | CENTURY ALUMINUM CO | $34.3M | 17.0% | -4% | 67 |
| 2 | $CSTM | CONSTELLIUM SE | $16.2M | 8.0% | -3% | 69.7 |
| 3 | $AA | Alcoa Corp | $15.5M | 7.7% | -3% | 66.2 |
| 4 | $HBM | Hudbay Minerals Inc. | $14.8M | 7.3% | -10% | — |
| 5 | $FCX | FREEPORT-MCMORAN INC | $14.2M | 7.0% | -10% | 73.1 |
| 6 | $CRS | CARPENTER TECHNOLOGY CORP | $14.2M | 7.0% | -2% | 69.9 |
| 7 | $SXT | SENSIENT TECHNOLOGIES CORP | $13.5M | 6.7% | +34% | 57.3 |
| 8 | $ATI | ATI INC | $13.4M | 6.6% | -29% | 64.5 |
| 9 | $KEX | KIRBY CORP | $11.8M | 5.9% | +2% | 64.1 |
| 10 | $SARO | StandardAero, Inc. | $10.5M | 5.2% | +11% | 67.4 |
| 11 |  $HMY | HARMONY GOLD MINING CO LTD | $10.2M | 5.1% | NEW | — |
| 12 |  $DHI | HORTON D R INC /DE/ | $9.1M | 4.5% | +2% | 54.6 |
| 13 |  $BLDR | Builders FirstSource, Inc. | $8.1M | 4.0% | +4% | 48.4 |
| 14 |  $AMBP | Ardagh Metal Packaging S.A. | $7.6M | 3.8% | +28% | — |
| 15 |  $CCJ | CAMECO CORP | $4.6M | 2.3% | +0% | — |
| 16 |  $ULCC | Frontier Group Holdings, Inc. | $3.4M | 1.7% | +0% | 33.6 |
New Positions (1)
$HMY HARMONY GOLD MINING CO LTD$10.2M
Browse Top Institutional Investors
13F Pro tracks 8,700+ institutional investors filing 13F reports with the SEC.
to search all 8,700+ institutional filers.
Available Analysis
13F Pro tracks comprehensive institutional data for Mountaineer Partners Management, LLC including:
Track Mountaineer Partners Management, LLC's Full Portfolio
See every holding, quarter-over-quarter changes, sector allocation, and accumulation patterns for Mountaineer Partners Management, LLC and 8,700+ other institutional investors.
Free tier includes full 13F search and fund profiles. Pro starts at $6.67/mo (billed annually).
AI-Powered Hedge Fund Analysis: Mountaineer Partners Management, LLC
13F Pro is an AI hedge fund tracker and stock research platform. For Mountaineer Partners Management, LLC (SEC CIK: 1730532), the platform ingests every quarterly Form 13F filing and applies AI-powered analysis on top — 10 specialized AI analysts (value, growth, momentum, macro, activist, and more) debate the fund's top positions and publish AI-generated analysis with cited SEC sources.
Every holding in Mountaineer Partners Management, LLC's portfolio is scored on a 32-signal AI quality ranking (ROIC, FCF margin, revenue growth, institutional flow, earnings quality, shareholder dilution, and more). Track accumulation and distribution quarter over quarter, identify conviction positions, and see AI stock analysis for each position — alongside 8,700+ other institutional filers and 2,800+ AI-ranked companies.