UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F COVER PAGE
OMB APPROVAL
OMB Number:3235-0006
Expires:July 31, 2015
Estimated average burden
hours per response:23.8
Report for the Calendar Year or Quarter Ended:
03-31-2024
Check here if Amendment: ☐ Amendment Number:
This Amendment (Check only one.):☐ is a restatement.
☐ adds new holdings entries.

Institutional Investment Manager Filing this Report:

Name:
Mountaineer Partners Management, LLC
Address:
950 3rd Avenue
28TH FLOOR
New York, NY 10022
Form 13F File Number:
028-19269

The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.


Person Signing this Report on Behalf of Reporting Manager:
Name:
Mark Lee
Title:
Managing Member
Phone:
646-459-7061


Signature, Place, and Date of Signing:

/s/Mark Lee
                         [Signature]
New York, NEW YORK
                 [City, State]
05-15-2024
                           [Date]
                          

Report Type (Check only one.):

☒ 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.) 

☐ 13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).) 

☐ 13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).)


Form 13F Summary Page

Report Summary:

Number of Other Included Managers:
0
Form 13F Information table Entry Total:
32
Form 13F Information table Value Total:
216607938
          (thousands)

List of Other Included Managers:

Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report.
[If there are no entries in this list, state "NONE" and omit the column headings and list entries.]

  
NONE


UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number:3235-0006
Expires:July 31, 2015
Estimated average burden
hours per response:23.8
COLUMN 1COLUMN 2COLUMN 3COLUMN 4COLUMN 5COLUMN 6COLUMN 7COLUMN 8
VALUESHRS ORSH/PUT/INVESTMENTOTHERVOTING AUTHORITY
NAME OF ISSUERTITLE OF CLASSCUSIP(x$1000)PRN AMTPRNCALLDISCRETIONMANAGERSOLESHAREDNONE
ALCOA CORPCOM0138721061,827,60054,087SHSOLE 0 0 54,087
ALCOA CORPCOM0138721065,793,701171,462SHSOLE171,462 0 0
ATI INCCOM01741R1022,353,87146,001SHSOLE 0 0 46,001
ATI INCCOM01741R1029,742,512190,395SHSOLE190,395 0 0
CENTURY ALUM COCOM1564311082,591,307168,376SHSOLE 0 0 168,376
CENTURY ALUM COCOM15643110830,375,6591,973,727SHSOLE1,973,727 0 0
CONSTELLIUM SECL A SHSF211071012,547,183115,205SHSOLE 0 0 115,205
CONSTELLIUM SECL A SHSF211071019,702,686438,837SHSOLE438,837 0 0
DIAMONDBACK ENERGY INCCOM25278X1099,777,31149,338SHSOLE49,338 0 0
DIAMONDBACK ENERGY INCCOM25278X1092,477,72012,503SHSOLE 0 0 12,503
ENTEGRIS INCCOM29362U1042,351,09416,729SHSOLE 0 0 16,729
ENTEGRIS INCCOM29362U1047,824,70555,676SHSOLE55,676 0 0
FREEPORT-MCMORAN INCCL B35671D8572,472,40652,582SHSOLE 0 0 52,582
FREEPORT-MCMORAN INCCL B35671D85710,480,993222,905SHSOLE222,905 0 0
HUDBAY MINERALS INCCOM4436281022,084,446297,778SHSOLE 0 0 297,778
HUDBAY MINERALS INCCOM4436281026,946,436992,348SHSOLE992,348 0 0
MATERION CORPCOM57669010110,965,94883,233SHSOLE83,233 0 0
MATERION CORPCOM5766901012,231,58216,938SHSOLE 0 0 16,938
NEXGEN ENERGY LTDCOM65340P1061,118,732143,981SHSOLE 0 0 143,981
NEXGEN ENERGY LTDCOM65340P1062,808,863361,501SHSOLE361,501 0 0
OLIN CORPCOM PAR $16806652052,452,25441,705SHSOLE 0 0 41,705
OLIN CORPCOM PAR $16806652059,507,078161,685SHSOLE161,685 0 0
SAN JUAN BASIN RTY TRUNIT BEN INT798241105891,995168,619SHSOLE 0 0 168,619
SAN JUAN BASIN RTY TRUNIT BEN INT7982411052,916,805551,381SHSOLE551,381 0 0
SCORPIO TANKERS INCSHSY7542C1306,961,81597,300SHSOLE97,300 0 0
SCORPIO TANKERS INCSHSY7542C1302,118,09529,603SHSOLE 0 0 29,603
TRANSOCEAN LTDREGISTERED SHSH8817H1001,407,524224,128SHSOLE 0 0 224,128
TRANSOCEAN LTDREGISTERED SHSH8817H1004,468,540711,551SHSOLE711,551 0 0
VISHAY INTERTECHNOLOGY INCCOM9282981082,432,430107,250SHSOLE 0 0 107,250
VISHAY INTERTECHNOLOGY INCCOM92829810846,757,6782,061,626SHSOLE2,061,626 0 0
WEST FRASER TIMBER CO LTDCOM9528451052,375,73927,503SHSOLE 0 0 27,503
WEST FRASER TIMBER CO LTDCOM9528451057,843,23090,798SHSOLE90,798 0 0