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Polymer Capital Management (US) LLC: CENX position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Polymer Capital Management (US) LLC on CENX, newest first. How the timeline and the estimate are built.

Polymer Capital Management (US) LLC held 21,727 CENX shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 21,727 shares
    Change vs previous 13F +11,727 shares

    0.15% of the 13F portfolio, value $999,659.

    13F-HR 0001973324-26-000009 filed by Polymer Capital Management (US) 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 10,000 shares
    Change vs previous 13F -20,000 shares

    0.09% of the 13F portfolio, value $586,900.

    13F-HR 0001973324-26-000007 filed by Polymer Capital Management (US) 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 30,000 shares
    Change vs previous 13F +20,703 shares

    0.15% of the 13F portfolio, value $1,175,400.

    13F-HR 0001973324-26-000003 filed by Polymer Capital Management (US) 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 9,297 shares
    Change vs previous 13F -14,203 shares

    0.04% of the 13F portfolio, value $272,960.

    13F-HR 0001973324-25-000011 filed by Polymer Capital Management (US) 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 23,500 shares
    Change vs previous 13F -2,197 shares

    0.07% of the 13F portfolio, value $423,470.

    13F-HR 0001641447-25-000003 filed by Polymer Capital Management (US) 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 25,697 shares
    Change vs previous 13F +2,197 shares

    0.14% of the 13F portfolio, value $476,936.

    13F-HR 0001973324-25-000006 filed by Polymer Capital Management (US) 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 23,500 shares
    Change vs previous 13F not available

    0.14% of the 13F portfolio, value $428,170.

    13F-HR 0001420506-25-000335 filed by Polymer Capital Management (US) LLC
    Filed (acceptance time not in the bulk data set), ingested

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