Skip to content
Disclosery

Main Street Research LLC: XBI position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Main Street Research LLC on XBI, newest first. How the timeline and the estimate are built.

Main Street Research LLC held 576,754 XBI shares at 2026-06-30 per its 13F-HR filed 2026-07-29.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 576,754 shares
    Change vs previous 13F +9,275 shares

    4.31% of the 13F portfolio, value $91,271,321.

    13F-HR 0001420506-26-001335 filed by Main Street Research 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 567,479 shares
    Change vs previous 13F +206,953 shares

    4.22% of the 13F portfolio, value $72,484,093.

    13F-HR 0001420506-26-000773 filed by Main Street Research 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 360,526 shares
    Change vs previous 13F not available

    2.51% of the 13F portfolio, value $43,958,935.

    13F-HR 0001420506-26-000210 filed by Main Street Research LLC
    Filed (acceptance time not in the bulk data set), ingested

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