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Granahan Investment Management, LLC: MGNI position timeline

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

Granahan Investment Management, LLC held 3,083,211 MGNI 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 3,083,211 shares
    Change vs previous 13F +529,798 shares

    2.09% of the 13F portfolio, value $58,519,345.

    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 2,553,413 shares
    Change vs previous 13F -562,517 shares

    1.47% of the 13F portfolio, value $30,334,546.

    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 3,115,930 shares
    Change vs previous 13F -757,249 shares

    2.17% of the 13F portfolio, value $50,571,544.

    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 3,873,179 shares
    Change vs previous 13F +230,393 shares

    3.45% of the 13F portfolio, value $84,357,839.

    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 ended2025-06-30
    13F 3,642,786 shares
    Change vs previous 13F +992,796 shares

    3.58% of the 13F portfolio, value $87,863,998.

    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).

  6. period ended2025-03-31
    13F 2,649,990 shares
    Change vs previous 13F -963,094 shares

    1.51% of the 13F portfolio, value $30,236,386.

    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).

  7. period ended2024-12-31
    13F 3,613,084 shares
    Change vs previous 13F -387,635 shares

    2.4% of the 13F portfolio, value $57,520,297.

    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).

  8. period ended2024-09-30
    13F 4,000,719 shares
    Change vs previous 13F not available

    2.18% of the 13F portfolio, value $55,409,958.

    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).