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Disclosery

GAMCO Investors (Gabelli): MPTI position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of GAMCO Investors (Gabelli) on MPTI, newest first. How the timeline and the estimate are built.

GAMCO Investors (Gabelli) held 201,280 MPTI shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 201,280 shares
    Change vs previous 13F +32,880 shares

    0.18% of the 13F portfolio, value $19,956,912.

    13F-HR 0001140361-26-032508 filed by GAMCO INVESTORS, INC. ET AL
    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 168,400 shares
    Change vs previous 13F -5,860 shares

    0.11% of the 13F portfolio, value $11,257,540.

    13F-HR 0001140361-26-021334 filed by GAMCO INVESTORS, INC. ET AL
    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 174,260 shares
    Change vs previous 13F +32,760 shares

    0.09% of the 13F portfolio, value $9,274,117.

    13F-HR 0001140361-26-003895 filed by GAMCO INVESTORS, INC. ET AL
    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 141,500 shares
    Change vs previous 13F -3,000 shares

    0.08% of the 13F portfolio, value $7,850,420.

    13F-HR 0001140361-25-041670 filed by GAMCO INVESTORS, INC. ET AL
    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 144,500 shares
    Change vs previous 13F -3,800 shares

    0.06% of the 13F portfolio, value $6,069,000.

    13F-HR 0001140361-25-030814 filed by GAMCO INVESTORS, INC. ET AL
    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 148,300 shares
    Change vs previous 13F -6,400 shares

    0.07% of the 13F portfolio, value $6,605,282.

    13F-HR 0001140361-25-018975 filed by GAMCO INVESTORS, INC. ET AL
    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 154,700 shares
    Change vs previous 13F -16,500 shares

    0.08% of the 13F portfolio, value $7,492,121.

    13F-HR 0001140361-25-004330 filed by GAMCO INVESTORS, INC. ET AL
    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 171,200 shares
    Change vs previous 13F not available

    0.07% of the 13F portfolio, value $7,137,328.

    13F-HR 0001140361-24-046738 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

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