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Portolan Capital Management, LLC: ZETA position timeline

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

Portolan Capital Management, LLC held 1,502,738 ZETA 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 1,502,738 shares
    Change vs previous 13F +1,016,467 shares

    1.11% of the 13F portfolio, value $29,573,884.

    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 486,271 shares
    Change vs previous 13F -832,526 shares

    0.41% of the 13F portfolio, value $7,741,434.

    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 1,318,797 shares
    Change vs previous 13F +293,602 shares

    1.44% of the 13F portfolio, value $26,837,519.

    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 1,025,195 shares
    Change vs previous 13F -290,495 shares

    1.1% of the 13F portfolio, value $20,370,625.

    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 1,315,690 shares
    Change vs previous 13F +573,838 shares

    1.28% of the 13F portfolio, value $20,380,038.

    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 741,852 shares
    Change vs previous 13F +77,489 shares

    0.76% of the 13F portfolio, value $10,059,513.

    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 664,363 shares
    Change vs previous 13F -740,769 shares

    0.8% of the 13F portfolio, value $11,951,890.

    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).

  8. period ended2024-09-30
    13F 1,405,132 shares
    Change vs previous 13F not available

    3.04% of the 13F portfolio, value $41,915,088.

    13F-HR 0001104659-24-118686 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).