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Disclosery

GROUP ONE TRADING LLC: HYLN position timeline

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

GROUP ONE TRADING LLC held 24,556 HYLN 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 24,556 shares
    Change vs previous 13F -26,021 shares

    <0.01% of the 13F portfolio, value $127,937.

    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 50,577 shares
    Change vs previous 13F +21,800 shares

    <0.01% of the 13F portfolio, value $89,016.

    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 28,777 shares
    Change vs previous 13F +11,898 shares

    <0.01% of the 13F portfolio, value $52,950.

    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 16,879 shares
    Change vs previous 13F -8,706 shares

    <0.01% of the 13F portfolio, value $33,252.

    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 25,585 shares
    Change vs previous 13F +24,292 shares

    <0.01% of the 13F portfolio, value $33,772.

    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 1,293 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $1,810.

    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).