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Disclosery

Penbrook Management LLC: PLAB position timeline

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

Penbrook Management LLC held 89,055 PLAB 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 89,055 shares
    Change vs previous 13F -7,675 shares

    1.85% of the 13F portfolio, value $2,896,959.

    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 96,730 shares
    Change vs previous 13F -13,950 shares

    2.96% of the 13F portfolio, value $3,908,859.

    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 110,680 shares
    Change vs previous 13F -700 shares

    2.44% of the 13F portfolio, value $3,541,760.

    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 111,380 shares
    Change vs previous 13F +4,950 shares

    1.78% of the 13F portfolio, value $2,556,171.

    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 106,430 shares
    Change vs previous 13F +14,385 shares

    1.51% of the 13F portfolio, value $2,004,076.

    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 92,045 shares
    Change vs previous 13F -1,000 shares

    1.44% of the 13F portfolio, value $1,910,854.

    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 93,045 shares
    Change vs previous 13F +350 shares

    1.5% of the 13F portfolio, value $2,192,140.

    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 92,695 shares
    Change vs previous 13F not available

    1.49% of the 13F portfolio, value $2,295,128.

    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).