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Penbrook Management LLC: BLFS position timeline

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

Penbrook Management LLC held 39,705 BLFS shares at 2026-06-30 per its 13F-HR filed 2026-07-23.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 39,705 shares
    Change vs previous 13F +16,550 shares

    0.72% of the 13F portfolio, value $1,121,269.

    13F-HR 0001381055-26-000003 filed by Penbrook 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 23,155 shares
    Change vs previous 13F +200 shares

    0.33% of the 13F portfolio, value $441,797.

    13F-HR 0001381055-26-000002 filed by Penbrook 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 22,955 shares
    Change vs previous 13F -200 shares

    0.38% of the 13F portfolio, value $555,052.

    13F-HR 0001381055-26-000001 filed by Penbrook 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 23,155 shares
    Change vs previous 13F 0 shares

    0.41% of the 13F portfolio, value $590,684.

    13F-HR 0001381055-25-000008 filed by Penbrook 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/A 23,155 shares
    Change vs previous 13F -7,270 shares

    0.38% of the 13F portfolio, value $498,758.

    13F-HR/A 0001381055-25-000006 filed by Penbrook 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 30,425 shares
    Change vs previous 13F -225 shares

    0.53% of the 13F portfolio, value $694,907.

    13F-HR 0001381055-25-000002 filed by Penbrook 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 30,650 shares
    Change vs previous 13F 0 shares

    0.54% of the 13F portfolio, value $795,674.

    13F-HR 0001381055-25-000001 filed by Penbrook 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 30,650 shares
    Change vs previous 13F not available

    0.5% of the 13F portfolio, value $767,476.

    13F-HR 0001381055-24-000005 filed by Penbrook Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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