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Lumbard & Kellner, LLC: MTRN position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Lumbard & Kellner, LLC on MTRN, newest first. How the timeline and the estimate are built.

Lumbard & Kellner, LLC held 51,579 MTRN shares at 2026-06-30 per its 13F-HR filed 2026-08-06.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 51,579 shares
    Change vs previous 13F -2 shares

    4.65% of the 13F portfolio, value $15,339,079.

    13F-HR 0001602476-26-000003 filed by Lumbard & Kellner, LLC
    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 51,581 shares
    Change vs previous 13F +46 shares

    2.59% of the 13F portfolio, value $7,461,192.

    13F-HR 0001602476-26-000002 filed by Lumbard & Kellner, LLC
    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 51,535 shares
    Change vs previous 13F -755 shares

    2.24% of the 13F portfolio, value $6,406,831.

    13F-HR 0001602476-26-000001 filed by Lumbard & Kellner, LLC
    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 52,290 shares
    Change vs previous 13F 0 shares

    2.32% of the 13F portfolio, value $6,317,155.

    13F-HR 0001602476-25-000005 filed by Lumbard & Kellner, LLC
    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 52,290 shares
    Change vs previous 13F not available

    1.81% of the 13F portfolio, value $4,150,257.

    13F-HR 0001602476-25-000004 filed by Lumbard & Kellner, LLC
    Filed (acceptance time not in the bulk data set), ingested

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