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Disclosery

GROUP ONE TRADING LLC: CYH position timeline

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

GROUP ONE TRADING LLC held 37,016 CYH 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 37,016 shares
    Change vs previous 13F -223,654 shares

    <0.01% of the 13F portfolio, value $123,633.

    13F-HR 0000932540-26-000011 filed by GROUP ONE TRADING 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 260,670 shares
    Change vs previous 13F +207,152 shares

    0.03% of the 13F portfolio, value $766,370.

    13F-HR 0000932540-26-000005 filed by GROUP ONE TRADING 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 53,518 shares
    Change vs previous 13F -26,333 shares

    <0.01% of the 13F portfolio, value $166,976.

    13F-HR 0000932540-26-000002 filed by GROUP ONE TRADING 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 79,851 shares
    Change vs previous 13F +56,265 shares

    0.01% of the 13F portfolio, value $256,322.

    13F-HR 0000932540-25-000040 filed by GROUP ONE TRADING 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 23,586 shares
    Change vs previous 13F +18,083 shares

    <0.01% of the 13F portfolio, value $80,192.

    13F-HR 0000932540-25-000034 filed by GROUP ONE TRADING 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 5,503 shares
    Change vs previous 13F -95,665 shares

    <0.01% of the 13F portfolio, value $14,858.

    13F-HR 0000932540-25-000027 filed by GROUP ONE TRADING 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/A 101,168 shares
    Change vs previous 13F +85,888 shares

    0.01% of the 13F portfolio, value $302,492.

    13F-HR/A 0000932540-25-000028 filed by GROUP ONE TRADING 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 15,280 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $92,750.

    13F-HR 0000932540-24-000015 filed by GROUP ONE TRADING LLC
    Filed (acceptance time not in the bulk data set), ingested

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