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Disclosery

HEARTLAND ADVISORS INC: MTDR position timeline

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

HEARTLAND ADVISORS INC held 134,318 MTDR 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 134,318 shares
    Change vs previous 13F -17,965 shares

    0.3% of the 13F portfolio, value $6,686,350.

    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 152,283 shares
    Change vs previous 13F -57,896 shares

    0.49% of the 13F portfolio, value $9,621,240.

    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 210,179 shares
    Change vs previous 13F +39,391 shares

    0.48% of the 13F portfolio, value $8,919,997.

    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 170,788 shares
    Change vs previous 13F +17,328 shares

    0.41% of the 13F portfolio, value $7,673,505.

    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 153,460 shares
    Change vs previous 13F +19,622 shares

    0.41% of the 13F portfolio, value $7,323,111.

    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 133,838 shares
    Change vs previous 13F +26,501 shares

    0.39% of the 13F portfolio, value $6,837,783.

    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 107,337 shares
    Change vs previous 13F not available

    0.33% of the 13F portfolio, value $6,038,780.

    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).