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Disclosery

GROUP ONE TRADING LLC: SERV position timeline

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

GROUP ONE TRADING LLC held 177,644 SERV 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 177,644 shares
    Change vs previous 13F +119,774 shares

    0.03% of the 13F portfolio, value $1,168,898.

    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 57,870 shares
    Change vs previous 13F -208,244 shares

    0.02% of the 13F portfolio, value $488,423.

    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 266,114 shares
    Change vs previous 13F +9,960 shares

    0.08% of the 13F portfolio, value $2,762,263.

    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 256,154 shares
    Change vs previous 13F +2,394 shares

    0.09% of the 13F portfolio, value $2,979,071.

    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 253,760 shares
    Change vs previous 13F +216,551 shares

    0.1% of the 13F portfolio, value $2,903,014.

    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 37,209 shares
    Change vs previous 13F +23,713 shares

    0.01% of the 13F portfolio, value $213,952.

    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 13,496 shares
    Change vs previous 13F -34,047 shares

    0.01% of the 13F portfolio, value $182,196.

    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 47,543 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $377,967.

    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).