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OBERWEIS ASSET MANAGEMENT INC/: OSIS position timeline

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

OBERWEIS ASSET MANAGEMENT INC/ held 107,143 OSIS 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 107,143 shares
    Change vs previous 13F +550 shares

    0.48% of the 13F portfolio, value $23,432,174.

    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 106,593 shares
    Change vs previous 13F +5,193 shares

    0.84% of the 13F portfolio, value $28,301,507.

    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 101,400 shares
    Change vs previous 13F 0 shares

    0.95% of the 13F portfolio, value $25,863,084.

    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 101,400 shares
    Change vs previous 13F -7,600 shares

    0.97% of the 13F portfolio, value $25,272,936.

    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 109,000 shares
    Change vs previous 13F +8,600 shares

    1.07% of the 13F portfolio, value $24,509,740.

    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 100,400 shares
    Change vs previous 13F 0 shares

    0.97% of the 13F portfolio, value $19,511,736.

    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 100,400 shares
    Change vs previous 13F +31,200 shares

    0.79% of the 13F portfolio, value $16,809,972.

    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 69,200 shares
    Change vs previous 13F not available

    0.54% of the 13F portfolio, value $10,506,636.

    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).