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Disclosery

Granahan Investment Management, LLC: GRBK position timeline

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

Granahan Investment Management, LLC held 75,201 GRBK 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 75,201 shares
    Change vs previous 13F +75,201 shares

    0.21% of the 13F portfolio, value $6,019,088.

    13F-HR 0001398344-26-014483 filed by Granahan Investment 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 ended2025-12-31
    13F 0 shares
    Change vs previous 13F -61,870 shares

    13F-HR 0001398344-26-003202 filed by Granahan Investment Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  3. period ended2025-09-30
    13F 61,870 shares
    Change vs previous 13F -42,425 shares

    0.19% of the 13F portfolio, value $4,569,718.

    13F-HR 0001398344-25-020897 filed by Granahan Investment 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 ended2025-06-30
    13F 104,295 shares
    Change vs previous 13F -10,518 shares

    0.27% of the 13F portfolio, value $6,558,070.

    13F-HR 0001398344-25-015412 filed by Granahan Investment 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 ended2025-03-31
    13F 114,813 shares
    Change vs previous 13F not available

    0.33% of the 13F portfolio, value $6,694,746.

    13F-HR 0001398344-25-009461 filed by Granahan Investment Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

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