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JANE STREET GROUP, LLC: KOS position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of JANE STREET GROUP, LLC on KOS, newest first. How the timeline and the estimate are built.

JANE STREET GROUP, LLC held 93,337 KOS 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 93,337 shares
    Change vs previous 13F -11,649,778 shares

    <0.01% of the 13F portfolio, value $196,941.

    13F-HR 0001595888-26-000108 filed by JANE STREET GROUP, 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 11,743,115 shares
    Change vs previous 13F +2,473,362 shares

    0.04% of the 13F portfolio, value $32,645,859.

    13F-HR 0001595888-26-000043 filed by JANE STREET GROUP, 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 9,269,753 shares
    Change vs previous 13F +7,527,058 shares

    0.01% of the 13F portfolio, value $8,411,374.

    13F-HR 0001595888-26-000023 filed by JANE STREET GROUP, 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 1,742,695 shares
    Change vs previous 13F +150,507 shares

    <0.01% of the 13F portfolio, value $2,892,874.

    13F-HR 0001595888-25-000155 filed by JANE STREET GROUP, 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 1,592,188 shares
    Change vs previous 13F +1,266,773 shares

    <0.01% of the 13F portfolio, value $2,738,564.

    13F-HR 0001595888-25-000117 filed by JANE STREET GROUP, 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/A 325,415 shares
    Change vs previous 13F -332,472 shares

    <0.01% of the 13F portfolio, value $741,946.

    13F-HR/A 0001595888-25-000100 filed by JANE STREET GROUP, 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 657,887 shares
    Change vs previous 13F +321,708 shares

    <0.01% of the 13F portfolio, value $2,249,974.

    13F-HR 0001595888-25-000068 filed by JANE STREET GROUP, 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 336,179 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $1,354,801.

    13F-HR 0001595888-24-000063 filed by JANE STREET GROUP, LLC
    Filed (acceptance time not in the bulk data set), ingested

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