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CenterBook Partners LP: MAMA position timeline

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

CenterBook Partners LP held 50,864 MAMA 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 50,864 shares
    Change vs previous 13F -89,911 shares

    0.04% of the 13F portfolio, value $907,922.

    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 140,775 shares
    Change vs previous 13F -65,833 shares

    0.12% of the 13F portfolio, value $2,159,489.

    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 206,608 shares
    Change vs previous 13F +9,414 shares

    0.14% of the 13F portfolio, value $2,787,142.

    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 197,194 shares
    Change vs previous 13F -18,204 shares

    0.1% of the 13F portfolio, value $2,072,509.

    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 215,398 shares
    Change vs previous 13F not available

    0.1% of the 13F portfolio, value $1,787,803.

    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).