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Disclosery

Mainstream Capital Management LLC: GBTC position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Mainstream Capital Management LLC on GBTC, newest first. How the timeline and the estimate are built.

Mainstream Capital Management LLC held 0 GBTC shares at 2026-03-31 per its 13F-HR filed 2026-04-17.

the latest 13F is the newest step

  1. period ended2026-03-31
    13F 0 shares
    Change vs previous 13F -3,538 shares

    13F-HR 0002043084-26-000002 filed by Mainstream Capital Management 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.

  2. period ended2025-12-31
    13F 3,538 shares
    Change vs previous 13F 0 shares

    0.16% of the 13F portfolio, value $241,858.

    13F-HR 0002043084-26-000001 filed by Mainstream Capital 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 ended2025-09-30
    13F 3,538 shares
    Change vs previous 13F -46 shares

    0.21% of the 13F portfolio, value $317,606.

    13F-HR 0002043084-25-000006 filed by Mainstream Capital 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 ended2025-06-30
    13F 3,584 shares
    Change vs previous 13F -273 shares

    0.22% of the 13F portfolio, value $304,031.

    13F-HR 0002043084-25-000004 filed by Mainstream Capital 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 ended2025-03-31
    13F 3,857 shares
    Change vs previous 13F -19 shares

    0.2% of the 13F portfolio, value $251,361.

    13F-HR 0002043084-25-000002 filed by Mainstream Capital 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 ended2024-12-31
    13F 3,876 shares
    Change vs previous 13F not available

    0.2% of the 13F portfolio, value $286,902.

    13F-HR 0002043084-25-000001 filed by Mainstream Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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