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BISLETT MANAGEMENT, LLC: CMCSA position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of BISLETT MANAGEMENT, LLC on CMCSA, newest first. How the timeline and the estimate are built.

BISLETT MANAGEMENT, LLC held 220,000 CMCSA shares at 2026-06-30 per its 13F-HR filed 2026-08-11.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 220,000 shares
    Change vs previous 13F +60,000 shares

    3.66% of the 13F portfolio, value $5,401,000.

    13F-HR 0000935836-26-000381 filed by BISLETT MANAGEMENT, 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 160,000 shares
    Change vs previous 13F 0 shares

    3.54% of the 13F portfolio, value $4,593,600.

    13F-HR 0000935836-26-000235 filed by BISLETT MANAGEMENT, 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 160,000 shares
    Change vs previous 13F -90,000 shares

    3.63% of the 13F portfolio, value $4,782,400.

    13F-HR 0000935836-26-000094 filed by BISLETT MANAGEMENT, 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 250,000 shares
    Change vs previous 13F 0 shares

    5.69% of the 13F portfolio, value $7,855,000.

    13F-HR 0000935836-25-000663 filed by BISLETT MANAGEMENT, 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 250,000 shares
    Change vs previous 13F +10,000 shares

    6.1% of the 13F portfolio, value $8,922,500.

    13F-HR 0000935836-25-000485 filed by BISLETT MANAGEMENT, 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 240,000 shares
    Change vs previous 13F +30,000 shares

    6.27% of the 13F portfolio, value $8,856,000.

    13F-HR 0000935836-25-000326 filed by BISLETT MANAGEMENT, 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 210,000 shares
    Change vs previous 13F +35,000 shares

    5.58% of the 13F portfolio, value $7,881,300.

    13F-HR 0000935836-25-000123 filed by BISLETT MANAGEMENT, 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 175,000 shares
    Change vs previous 13F not available

    4.89% of the 13F portfolio, value $7,309,750.

    13F-HR 0000935836-24-000646 filed by BISLETT MANAGEMENT, LLC
    Filed (acceptance time not in the bulk data set), ingested

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