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Mountaineer Partners Management, LLC: AA position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Mountaineer Partners Management, LLC on AA, newest first. How the timeline and the estimate are built.

Mountaineer Partners Management, LLC held 208,165 AA shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F/A 208,165 shares
    Change vs previous 13F -25,522 shares

    7.89% of the 13F portfolio, value $10,853,723.

    13F-HR 0000919574-26-005107 filed by Mountaineer Partners Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  2. period ended2026-03-31
    13F 233,687 shares
    Change vs previous 13F -8,307 shares

    7.7% of the 13F portfolio, value $15,500,459.

    13F-HR 0000919574-26-003280 filed by Mountaineer Partners Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  3. period ended2025-12-31
    13F 241,994 shares
    Change vs previous 13F -54,648 shares

    7.2% of the 13F portfolio, value $12,859,561.

    13F-HR 0000919574-26-000943 filed by Mountaineer Partners Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  4. period ended2025-09-30
    13F 296,642 shares
    Change vs previous 13F -8,139 shares

    5.67% of the 13F portfolio, value $9,756,556.

    13F-HR 0000919574-25-006893 filed by Mountaineer Partners Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  5. period ended2025-06-30
    13F 304,781 shares
    Change vs previous 13F +38,816 shares

    5.94% of the 13F portfolio, value $8,994,087.

    13F-HR 0000919574-25-004802 filed by Mountaineer Partners Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  6. period ended2025-03-31
    13F 265,965 shares
    Change vs previous 13F +8,187 shares

    7.76% of the 13F portfolio, value $8,111,933.

    13F-HR 0000919574-25-003166 filed by Mountaineer Partners Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  7. period ended2024-12-31
    13F 257,778 shares
    Change vs previous 13F -22,053 shares

    7.13% of the 13F portfolio, value $9,738,853.

    13F-HR 0000919574-25-001213 filed by Mountaineer Partners Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  8. period ended2024-09-30
    13F/A 279,831 shares
    Change vs previous 13F not available

    6.73% of the 13F portfolio, value $10,795,880.

    13F-HR/A 0000919574-24-006813 filed by Mountaineer Partners Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).