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CASTLEARK MANAGEMENT LLC: VRTX position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of CASTLEARK MANAGEMENT LLC on VRTX, newest first. How the timeline and the estimate are built.

CASTLEARK MANAGEMENT LLC held 730 VRTX shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 730 shares
    Change vs previous 13F 0 shares

    0.01% of the 13F portfolio, value $362,613.

    13F-HR 0001106832-26-000004 filed by CASTLEARK MANAGEMENT LLC
    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 730 shares
    Change vs previous 13F 0 shares

    0.01% of the 13F portfolio, value $325,974.

    13F-HR 0001106832-26-000003 filed by CASTLEARK MANAGEMENT LLC
    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 730 shares
    Change vs previous 13F 0 shares

    0.01% of the 13F portfolio, value $330,953.

    13F-HR 0001106832-26-000001 filed by CASTLEARK MANAGEMENT LLC
    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 730 shares
    Change vs previous 13F 0 shares

    0.01% of the 13F portfolio, value $285,897.

    13F-HR 0001106832-25-000008 filed by CASTLEARK MANAGEMENT LLC
    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 730 shares
    Change vs previous 13F -46,309 shares

    0.01% of the 13F portfolio, value $324,996.

    13F-HR 0001106832-25-000006 filed by CASTLEARK MANAGEMENT LLC
    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 47,039 shares
    Change vs previous 13F +554 shares

    0.79% of the 13F portfolio, value $22,805,448.

    13F-HR 0001106832-25-000004 filed by CASTLEARK MANAGEMENT LLC
    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 46,485 shares
    Change vs previous 13F -36,240 shares

    0.65% of the 13F portfolio, value $18,719,510.

    13F-HR 0001106832-25-000001 filed by CASTLEARK MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-09-30
    13F 82,725 shares
    Change vs previous 13F not available

    1.57% of the 13F portfolio, value $38,473,743.

    13F-HR 0001106832-24-000008 filed by CASTLEARK MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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