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Disclosery

HARBOR CAPITAL ADVISORS, INC.: KOS position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of HARBOR CAPITAL ADVISORS, INC. on KOS, newest first. How the timeline and the estimate are built.

HARBOR CAPITAL ADVISORS, INC. held 669,796 KOS shares at 2026-06-30 per its 13F-HR filed 2026-08-07.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 669,796 shares
    Change vs previous 13F +16,376 shares

    0.1% of the 13F portfolio, value $1,413,000.

    13F-HR 0001039128-26-000003 filed by HARBOR CAPITAL ADVISORS, INC.
    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 653,420 shares
    Change vs previous 13F +408,386 shares

    0.15% of the 13F portfolio, value $1,817,000.

    13F-HR 0001039128-26-000002 filed by HARBOR CAPITAL ADVISORS, INC.
    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 245,034 shares
    Change vs previous 13F +21,895 shares

    0.02% of the 13F portfolio, value $222,000.

    13F-HR 0001039128-26-000001 filed by HARBOR CAPITAL ADVISORS, INC.
    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 223,139 shares
    Change vs previous 13F -709,188 shares

    0.03% of the 13F portfolio, value $370,000.

    13F-HR 0001039128-25-000005 filed by HARBOR CAPITAL ADVISORS, INC.
    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 932,327 shares
    Change vs previous 13F -387,176 shares

    0.07% of the 13F portfolio, value $1,604,000.

    13F-HR 0001039128-25-000003 filed by HARBOR CAPITAL ADVISORS, INC.
    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 1,319,503 shares
    Change vs previous 13F -23,660 shares

    0.14% of the 13F portfolio, value $3,008,000.

    13F-HR 0001039128-25-000002 filed by HARBOR CAPITAL ADVISORS, INC.
    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 1,343,163 shares
    Change vs previous 13F +51,699 shares

    0.2% of the 13F portfolio, value $4,594,000.

    13F-HR 0001039128-25-000001 filed by HARBOR CAPITAL ADVISORS, INC.
    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 1,291,464 shares
    Change vs previous 13F not available

    0.23% of the 13F portfolio, value $5,205,000.

    13F-HR 0001039128-24-000005 filed by HARBOR CAPITAL ADVISORS, INC.
    Filed (acceptance time not in the bulk data set), ingested

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