Skip to content
Disclosery

HEARTLAND ADVISORS INC: MTRN position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of HEARTLAND ADVISORS INC on MTRN, newest first. How the timeline and the estimate are built.

HEARTLAND ADVISORS INC held 40,550 MTRN shares at 2026-06-30 per its 13F-HR filed 2026-08-11.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 40,550 shares
    Change vs previous 13F -7,802 shares

    0.54% of the 13F portfolio, value $12,059,165.

    13F-HR 0000892712-26-000340 filed by HEARTLAND ADVISORS 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 48,352 shares
    Change vs previous 13F -2,507 shares

    0.36% of the 13F portfolio, value $6,994,117.

    13F-HR 0000892712-26-000226 filed by HEARTLAND ADVISORS 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 50,859 shares
    Change vs previous 13F -29,581 shares

    0.34% of the 13F portfolio, value $6,322,791.

    13F-HR 0000892712-26-000080 filed by HEARTLAND ADVISORS 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 80,440 shares
    Change vs previous 13F -10,403 shares

    0.51% of the 13F portfolio, value $9,717,956.

    13F-HR 0000892712-25-000143 filed by HEARTLAND ADVISORS 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 90,843 shares
    Change vs previous 13F -228 shares

    0.4% of the 13F portfolio, value $7,210,209.

    13F-HR 0000892712-25-000090 filed by HEARTLAND ADVISORS 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 91,071 shares
    Change vs previous 13F 0 shares

    0.43% of the 13F portfolio, value $7,431,394.

    13F-HR 0000892712-25-000061 filed by HEARTLAND ADVISORS 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 91,071 shares
    Change vs previous 13F 0 shares

    0.49% of the 13F portfolio, value $9,005,100.

    13F-HR 0000892712-25-000032 filed by HEARTLAND ADVISORS 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 91,071 shares
    Change vs previous 13F not available

    0.53% of the 13F portfolio, value $10,187,202.

    13F-HR 0000892712-24-000127 filed by HEARTLAND ADVISORS INC
    Filed (acceptance time not in the bulk data set), ingested

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