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Portolan Capital Management, LLC: POWL position timeline

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

Portolan Capital Management, LLC held 145,631 POWL shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 145,631 shares
    Change vs previous 13F +69,801 shares

    1.56% of the 13F portfolio, value $41,702,893.

    13F-HR 0001104659-26-096980 filed by Portolan Capital 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 75,830 shares
    Change vs previous 13F -3,286 shares

    2.18% of the 13F portfolio, value $41,030,096.

    13F-HR 0001104659-26-062488 filed by Portolan 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 ended2025-12-31
    13F 79,116 shares
    Change vs previous 13F -69,129 shares

    1.35% of the 13F portfolio, value $25,220,598.

    13F-HR 0001104659-26-016304 filed by Portolan 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 ended2025-09-30
    13F 148,245 shares
    Change vs previous 13F -22,313 shares

    2.45% of the 13F portfolio, value $45,186,558.

    13F-HR 0001104659-25-111284 filed by Portolan 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 ended2025-06-30
    13F 170,558 shares
    Change vs previous 13F +117,334 shares

    2.25% of the 13F portfolio, value $35,893,931.

    13F-HR 0001104659-25-077571 filed by Portolan 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 ended2025-03-31
    13F 53,224 shares
    Change vs previous 13F +40,631 shares

    0.69% of the 13F portfolio, value $9,065,644.

    13F-HR 0001104659-25-049320 filed by Portolan Capital 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 12,593 shares
    Change vs previous 13F not available

    0.19% of the 13F portfolio, value $2,791,238.

    13F-HR 0001104659-25-012988 filed by Portolan Capital Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

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