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Disclosery

MARSHALL WACE, LLP: HRZN position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of MARSHALL WACE, LLP on HRZN, newest first. How the timeline and the estimate are built.

MARSHALL WACE, LLP held 592,247 HRZN shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 592,247 shares
    Change vs previous 13F +420,469 shares

    <0.01% of the 13F portfolio, value $2,801,329.

    13F-HR 0001318757-26-000010 filed by MARSHALL WACE, LLP
    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 171,778 shares
    Change vs previous 13F -110,511 shares

    <0.01% of the 13F portfolio, value $723,186.

    13F-HR 0001318757-26-000005 filed by MARSHALL WACE, LLP
    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 282,289 shares
    Change vs previous 13F -65,492 shares

    <0.01% of the 13F portfolio, value $1,820,765.

    13F-HR 0001318757-26-000003 filed by MARSHALL WACE, LLP
    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 347,781 shares
    Change vs previous 13F +333,498 shares

    <0.01% of the 13F portfolio, value $2,121,465.

    13F-HR 0001318757-25-000046 filed by MARSHALL WACE, LLP
    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 14,283 shares
    Change vs previous 13F +14,283 shares

    <0.01% of the 13F portfolio, value $102,838.

    13F-HR 0001318757-25-000034 filed by MARSHALL WACE, LLP
    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 0 shares
    Change vs previous 13F -143,219 shares

    13F-HR 0001318757-25-000023 filed by MARSHALL WACE, LLP
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  7. period ended2024-12-31
    13F 143,219 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $1,287,537.

    13F-HR 0002048047-25-000005 filed by MARSHALL WACE, LLP
    Filed (acceptance time not in the bulk data set), ingested

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