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Disclosery

WILLIAM JOHN SEMPOLINSKI: O position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of WILLIAM JOHN SEMPOLINSKI on O, newest first. How the timeline and the estimate are built.

WILLIAM JOHN SEMPOLINSKI held 31,250 O 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 31,250 shares
    Change vs previous 13F +500 shares

    0.78% of the 13F portfolio, value $1,936,250.

    13F-HR 0001951757-26-001260 filed by WILLIAM JOHN SEMPOLINSKI
    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 30,750 shares
    Change vs previous 13F +700 shares

    0.94% of the 13F portfolio, value $1,881,285.

    13F-HR 0001951757-26-001607 filed by WILLIAM JOHN SEMPOLINSKI
    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 30,050 shares
    Change vs previous 13F not available

    0.83% of the 13F portfolio, value $1,693,919.

    13F-HR 0001951757-26-001606 filed by WILLIAM JOHN SEMPOLINSKI
    Filed (acceptance time not in the bulk data set), ingested

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