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Rafferty Asset Management, LLC: KOS position timeline

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

Rafferty Asset Management, LLC held 785,365 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 785,365 shares
    Change vs previous 13F -562,365 shares

    <0.01% of the 13F portfolio, value $1,657,120.

    13F-HR 0001999371-26-017909 filed by Rafferty Asset 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 1,347,730 shares
    Change vs previous 13F +536,724 shares

    0.02% of the 13F portfolio, value $3,746,689.

    13F-HR 0001999371-26-010796 filed by Rafferty Asset 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 811,006 shares
    Change vs previous 13F +72,200 shares

    <0.01% of the 13F portfolio, value $735,907.

    13F-HR 0001999371-26-003261 filed by Rafferty Asset 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 738,806 shares
    Change vs previous 13F +212,970 shares

    <0.01% of the 13F portfolio, value $1,226,418.

    13F-HR 0001999371-25-017439 filed by Rafferty Asset 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 525,836 shares
    Change vs previous 13F -289,499 shares

    <0.01% of the 13F portfolio, value $904,438.

    13F-HR 0001999371-25-011302 filed by Rafferty Asset 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 815,335 shares
    Change vs previous 13F -59,890 shares

    0.01% of the 13F portfolio, value $1,858,964.

    13F-HR 0001999371-25-006071 filed by Rafferty Asset 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 875,225 shares
    Change vs previous 13F +193,558 shares

    0.01% of the 13F portfolio, value $2,993,270.

    13F-HR 0001999371-25-001622 filed by Rafferty Asset 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 681,667 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $2,747,118.

    13F-HR 0001999371-24-014625 filed by Rafferty Asset Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

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