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OBERWEIS ASSET MANAGEMENT INC/: MMSI position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of OBERWEIS ASSET MANAGEMENT INC/ on MMSI, newest first. How the timeline and the estimate are built.

OBERWEIS ASSET MANAGEMENT INC/ held 473,409 MMSI 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 473,409 shares
    Change vs previous 13F +49,200 shares

    0.68% of the 13F portfolio, value $32,826,180.

    13F-HR 0001213900-26-089777 filed by OBERWEIS ASSET MANAGEMENT INC/
    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 424,209 shares
    Change vs previous 13F +155,449 shares

    0.86% of the 13F portfolio, value $29,240,726.

    13F-HR 0001213900-26-057307 filed by OBERWEIS ASSET MANAGEMENT INC/
    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 268,760 shares
    Change vs previous 13F +36,750 shares

    0.87% of the 13F portfolio, value $23,688,506.

    13F-HR 0001213900-26-017101 filed by OBERWEIS ASSET MANAGEMENT INC/
    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 232,010 shares
    Change vs previous 13F +19,200 shares

    0.74% of the 13F portfolio, value $19,310,192.

    13F-HR 0001213900-25-111225 filed by OBERWEIS ASSET MANAGEMENT INC/
    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 212,810 shares
    Change vs previous 13F +4,250 shares

    0.87% of the 13F portfolio, value $19,893,479.

    13F-HR 0001213900-25-076460 filed by OBERWEIS ASSET MANAGEMENT INC/
    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 208,560 shares
    Change vs previous 13F -200 shares

    1.1% of the 13F portfolio, value $22,046,878.

    13F-HR 0001213900-25-043859 filed by OBERWEIS ASSET MANAGEMENT INC/
    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 208,760 shares
    Change vs previous 13F +6,620 shares

    0.95% of the 13F portfolio, value $20,191,267.

    13F-HR 0001213900-25-013939 filed by OBERWEIS ASSET MANAGEMENT INC/
    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 202,140 shares
    Change vs previous 13F not available

    1.02% of the 13F portfolio, value $19,977,496.

    13F-HR 0001213900-24-098012 filed by OBERWEIS ASSET MANAGEMENT INC/
    Filed (acceptance time not in the bulk data set), ingested

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