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CenterBook Partners LP: GSM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of CenterBook Partners LP on GSM, newest first. How the timeline and the estimate are built.

CenterBook Partners LP held 2,566,762 GSM shares at 2026-06-30 per its 13F-HR filed 2026-08-11.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 2,566,762 shares
    Change vs previous 13F +1,631,239 shares

    0.4% of the 13F portfolio, value $8,162,303.

    13F-HR 0001872738-26-000010 filed by CenterBook Partners LP
    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 935,523 shares
    Change vs previous 13F -538,705 shares

    0.21% of the 13F portfolio, value $3,854,355.

    13F-HR 0001872738-26-000008 filed by CenterBook Partners LP
    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 1,474,228 shares
    Change vs previous 13F +547,847 shares

    0.33% of the 13F portfolio, value $6,840,418.

    13F-HR 0000902664-26-000841 filed by CenterBook Partners LP
    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 926,381 shares
    Change vs previous 13F -1,276,256 shares

    0.21% of the 13F portfolio, value $4,215,034.

    13F-HR 0000902664-25-004789 filed by CenterBook Partners LP
    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 2,202,637 shares
    Change vs previous 13F -223,135 shares

    0.45% of the 13F portfolio, value $8,083,678.

    13F-HR 0000902664-25-003518 filed by CenterBook Partners LP
    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 2,425,772 shares
    Change vs previous 13F +224,864 shares

    0.57% of the 13F portfolio, value $8,999,614.

    13F-HR 0000902664-25-002221 filed by CenterBook Partners LP
    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 2,200,908 shares
    Change vs previous 13F not available

    0.5% of the 13F portfolio, value $8,363,450.

    13F-HR 0000902664-25-000921 filed by CenterBook Partners LP
    Filed (acceptance time not in the bulk data set), ingested

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