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Disclosery

Granahan Investment Management, LLC: MASS position timeline

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

Granahan Investment Management, LLC held 692,092 MASS 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 692,092 shares
    Change vs previous 13F -2,978 shares

    0.21% of the 13F portfolio, value $6,021,200.

    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 ended2026-03-31
    13F 695,070 shares
    Change vs previous 13F +603,929 shares

    0.21% of the 13F portfolio, value $4,253,828.

    13F-HR 0001398344-26-009220 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).

  3. period ended2025-12-31
    13F 91,141 shares
    Change vs previous 13F +26,803 shares

    0.02% of the 13F portfolio, value $478,490.

    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).

  4. period ended2025-09-30
    13F 64,338 shares
    Change vs previous 13F +64,338 shares

    0.02% of the 13F portfolio, value $563,601.

    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).

  5. period ended2025-03-31
    13F 0 shares
    Change vs previous 13F -522,786 shares

    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).

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

  6. period ended2024-12-31
    13F 522,786 shares
    Change vs previous 13F -338,647 shares

    0.05% of the 13F portfolio, value $1,150,129.

    13F-HR 0001398344-25-002765 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).

  7. period ended2024-09-30
    13F 861,433 shares
    Change vs previous 13F not available

    0.12% of the 13F portfolio, value $2,989,173.

    13F-HR 0001398344-24-020730 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).