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Disclosery

Soapstone Management L.P.: CSTM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Soapstone Management L.P. on CSTM, newest first. How the timeline and the estimate are built.

Soapstone Management L.P. held 200,000 CSTM 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 200,000 shares
    Change vs previous 13F -600,000 shares

    4.64% of the 13F portfolio, value $6,374,000.

    13F-HR 0001398344-26-014653 filed by Soapstone Management L.P.
    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 800,000 shares
    Change vs previous 13F -550,000 shares

    14.01% of the 13F portfolio, value $19,664,000.

    13F-HR 0001398344-26-009297 filed by Soapstone Management L.P.
    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 1,350,000 shares
    Change vs previous 13F -319,099 shares

    18.75% of the 13F portfolio, value $25,447,500.

    13F-HR 0001398344-26-003286 filed by Soapstone Management L.P.
    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 1,669,099 shares
    Change vs previous 13F -107,460 shares

    16.86% of the 13F portfolio, value $24,836,193.

    13F-HR 0001398344-25-020993 filed by Soapstone Management L.P.
    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 1,776,559 shares
    Change vs previous 13F +199,360 shares

    15.68% of the 13F portfolio, value $23,628,235.

    13F-HR 0001398344-25-015664 filed by Soapstone Management L.P.
    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 1,577,199 shares
    Change vs previous 13F +37,242 shares

    12.43% of the 13F portfolio, value $15,913,938.

    13F-HR 0001398344-25-009640 filed by Soapstone Management L.P.
    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 1,539,957 shares
    Change vs previous 13F +644,957 shares

    14.86% of the 13F portfolio, value $15,815,358.

    13F-HR 0001398344-25-002908 filed by Soapstone Management L.P.
    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 895,000 shares
    Change vs previous 13F not available

    12.1% of the 13F portfolio, value $14,552,700.

    13F-HR 0001398344-24-020867 filed by Soapstone Management L.P.
    Filed (acceptance time not in the bulk data set), ingested

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