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Disclosery

GROUP ONE TRADING LLC: PFE position timeline

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

GROUP ONE TRADING LLC held 868,402 PFE 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 868,402 shares
    Change vs previous 13F +276,169 shares

    0.6% of the 13F portfolio, value $20,911,120.

    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 592,233 shares
    Change vs previous 13F +432,806 shares

    0.55% of the 13F portfolio, value $16,629,903.

    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 159,427 shares
    Change vs previous 13F -60,319 shares

    0.12% of the 13F portfolio, value $3,969,732.

    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 219,746 shares
    Change vs previous 13F -78,620 shares

    0.17% of the 13F portfolio, value $5,599,128.

    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 298,366 shares
    Change vs previous 13F -91,562 shares

    0.24% of the 13F portfolio, value $7,232,392.

    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 389,928 shares
    Change vs previous 13F +389,928 shares

    0.41% of the 13F portfolio, value $9,880,776.

    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 0 shares
    Change vs previous 13F -330,485 shares

    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).

    Exited: the 13F for this period no longer lists the position.

  8. period ended2024-09-30
    13F 330,485 shares
    Change vs previous 13F not available

    0.38% of the 13F portfolio, value $9,564,236.

    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).