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Granahan Investment Management, LLC: MTRN position timeline

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

Granahan Investment Management, LLC held 69,793 MTRN 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 69,793 shares
    Change vs previous 13F -74,683 shares

    0.74% of the 13F portfolio, value $20,755,740.

    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 144,476 shares
    Change vs previous 13F +6,250 shares

    1.01% of the 13F portfolio, value $20,898,453.

    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 138,226 shares
    Change vs previous 13F +43,950 shares

    0.74% of the 13F portfolio, value $17,184,256.

    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 94,276 shares
    Change vs previous 13F -26,729 shares

    0.47% of the 13F portfolio, value $11,389,484.

    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 121,005 shares
    Change vs previous 13F -3,484 shares

    0.39% of the 13F portfolio, value $9,604,167.

    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 124,489 shares
    Change vs previous 13F -1,878 shares

    0.51% of the 13F portfolio, value $10,158,302.

    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 126,367 shares
    Change vs previous 13F -10,328 shares

    0.52% of the 13F portfolio, value $12,495,169.

    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 136,695 shares
    Change vs previous 13F not available

    0.6% of the 13F portfolio, value $15,290,703.

    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).