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Longitude (Cayman) Ltd.: ARM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Longitude (Cayman) Ltd. on ARM, newest first. How the timeline and the estimate are built.

Longitude (Cayman) Ltd. held 20,500 ARM shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 20,500 shares
    Change vs previous 13F -34,500 shares

    4.8% of the 13F portfolio, value $7,268,685.

    13F-HR 0001664999-26-000015 filed by Longitude (Cayman) Ltd.
    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 55,000 shares
    Change vs previous 13F +5,000 shares

    7.26% of the 13F portfolio, value $8,320,400.

    13F-HR 0001664999-26-000006 filed by Longitude (Cayman) Ltd.
    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 50,000 shares
    Change vs previous 13F +9,500 shares

    4.73% of the 13F portfolio, value $5,465,500.

    13F-HR 0001664999-26-000005 filed by Longitude (Cayman) Ltd.
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2024-12-31
    13F 40,500 shares
    Change vs previous 13F +14,000 shares

    5.73% of the 13F portfolio, value $4,996,080.

    13F-HR 0001664999-25-000001 filed by Longitude (Cayman) Ltd.
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2024-09-30
    13F 26,500 shares
    Change vs previous 13F not available

    5.43% of the 13F portfolio, value $3,789,765.

    13F-HR 0001664999-24-000004 filed by Longitude (Cayman) Ltd.
    Filed (acceptance time not in the bulk data set), ingested

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