Skip to content
Disclosery

CenterBook Partners LP: AMTM position timeline

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

CenterBook Partners LP held 328,766 AMTM 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 328,766 shares
    Change vs previous 13F +185,068 shares

    0.33% of the 13F portfolio, value $6,795,593.

    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 143,698 shares
    Change vs previous 13F -78,525 shares

    0.2% of the 13F portfolio, value $3,747,644.

    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 222,223 shares
    Change vs previous 13F -85,858 shares

    0.31% of the 13F portfolio, value $6,444,467.

    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 308,081 shares
    Change vs previous 13F +182,741 shares

    0.36% of the 13F portfolio, value $7,378,540.

    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 125,340 shares
    Change vs previous 13F -289,234 shares

    0.16% of the 13F portfolio, value $2,959,277.

    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 414,574 shares
    Change vs previous 13F +343,268 shares

    0.48% of the 13F portfolio, value $7,545,247.

    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 71,306 shares
    Change vs previous 13F not available

    0.09% of the 13F portfolio, value $1,499,565.

    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).