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OBERWEIS ASSET MANAGEMENT INC/: AMBA position timeline

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

OBERWEIS ASSET MANAGEMENT INC/ held 342,254 AMBA 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 342,254 shares
    Change vs previous 13F +47,069 shares

    0.61% of the 13F portfolio, value $29,365,393.

    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 295,185 shares
    Change vs previous 13F -322,675 shares

    0.45% of the 13F portfolio, value $15,194,648.

    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 617,860 shares
    Change vs previous 13F +6,500 shares

    1.6% of the 13F portfolio, value $43,769,202.

    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 611,360 shares
    Change vs previous 13F +38,000 shares

    1.93% of the 13F portfolio, value $50,449,427.

    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 573,360 shares
    Change vs previous 13F +4,535 shares

    1.65% of the 13F portfolio, value $37,879,028.

    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 568,825 shares
    Change vs previous 13F +386,025 shares

    1.43% of the 13F portfolio, value $28,628,962.

    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 182,800 shares
    Change vs previous 13F +20,800 shares

    0.63% of the 13F portfolio, value $13,296,872.

    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 162,000 shares
    Change vs previous 13F not available

    0.47% of the 13F portfolio, value $9,137,610.

    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).