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TEACHER RETIREMENT SYSTEM OF TEXAS: KOS position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of TEACHER RETIREMENT SYSTEM OF TEXAS on KOS, newest first. How the timeline and the estimate are built.

TEACHER RETIREMENT SYSTEM OF TEXAS held 0 KOS shares at 2026-03-31 per its 13F-HR filed 2026-04-30.

the latest 13F is the newest step

  1. period ended2026-03-31
    13F 0 shares
    Change vs previous 13F -15,782 shares

    13F-HR 0000796848-26-000002 filed by TEACHER RETIREMENT SYSTEM OF TEXAS
    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.

  2. period ended2025-12-31
    13F 15,782 shares
    Change vs previous 13F -46,801 shares

    <0.01% of the 13F portfolio, value $14,320.

    13F-HR 0000796848-26-000001 filed by TEACHER RETIREMENT SYSTEM OF TEXAS
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2025-09-30
    13F 62,583 shares
    Change vs previous 13F -9,955 shares

    <0.01% of the 13F portfolio, value $103,887.

    13F-HR 0000796848-25-000010 filed by TEACHER RETIREMENT SYSTEM OF TEXAS
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-06-30
    13F 72,538 shares
    Change vs previous 13F +3,550 shares

    <0.01% of the 13F portfolio, value $124,766.

    13F-HR 0000796848-25-000006 filed by TEACHER RETIREMENT SYSTEM OF TEXAS
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-03-31
    13F 68,988 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $157,292.

    13F-HR 0000796848-25-000004 filed by TEACHER RETIREMENT SYSTEM OF TEXAS
    Filed (acceptance time not in the bulk data set), ingested

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