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Disclosery

Mountaineer Partners Management, LLC: ENTG position timeline

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

Mountaineer Partners Management, LLC held 0 ENTG shares at 2025-12-31 per its 13F-HR filed 2026-02-13.

the latest 13F is the newest step

  1. period ended2025-12-31
    13F 0 shares
    Change vs previous 13F -123,234 shares

    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).

    Exited: the 13F for this period no longer lists the position.

  2. period ended2025-09-30
    13F 123,234 shares
    Change vs previous 13F -2,996 shares

    6.63% of the 13F portfolio, value $11,394,215.

    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).

  3. period ended2025-06-30
    13F 126,230 shares
    Change vs previous 13F +27,701 shares

    6.73% of the 13F portfolio, value $10,180,450.

    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).

  4. period ended2025-03-31
    13F 98,529 shares
    Change vs previous 13F -1,331 shares

    8.25% of the 13F portfolio, value $8,619,317.

    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).

  5. period ended2024-12-31
    13F 99,860 shares
    Change vs previous 13F +1,712 shares

    7.24% of the 13F portfolio, value $9,892,131.

    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).

  6. period ended2024-09-30
    13F/A 98,148 shares
    Change vs previous 13F not available

    6.89% of the 13F portfolio, value $11,044,594.

    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).