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GAMCO Investors (Gabelli): MIR position timeline

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

GAMCO Investors (Gabelli) held 886,430 MIR 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 886,430 shares
    Change vs previous 13F -26,212 shares

    0.06% of the 13F portfolio, value $15,893,690.

    13F-HR 0001140361-26-032508 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 535,270 shares
    • GABELLI FUNDS LLC: 351,160 shares

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

  2. period ended2026-03-31
    13F 912,642 shares
    Change vs previous 13F -59,537 shares

    0.07% of the 13F portfolio, value $16,966,015.

    13F-HR 0001140361-26-021334 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 544,662 shares
    • GABELLI FUNDS LLC: 367,980 shares

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

  3. period ended2025-12-31
    13F 972,179 shares
    Change vs previous 13F -35,690 shares

    0.09% of the 13F portfolio, value $22,768,432.

    13F-HR 0001140361-26-003895 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 541,929 shares
    • GABELLI FUNDS LLC: 430,250 shares

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

  4. period ended2025-09-30
    13F 1,007,869 shares
    Change vs previous 13F -65,519 shares

    0.09% of the 13F portfolio, value $23,443,033.

    13F-HR 0001140361-25-041670 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 526,619 shares
    • GABELLI FUNDS LLC: 481,250 shares

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

  5. period ended2025-06-30
    13F 1,073,388 shares
    Change vs previous 13F -42,989 shares

    0.1% of the 13F portfolio, value $23,110,043.

    13F-HR 0001140361-25-030814 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 562,074 shares
    • GABELLI FUNDS LLC: 511,314 shares

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

  6. period ended2025-03-31
    13F 1,116,377 shares
    Change vs previous 13F -39,945 shares

    0.07% of the 13F portfolio, value $16,187,467.

    13F-HR 0001140361-25-018975 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 592,127 shares
    • GABELLI FUNDS LLC: 524,250 shares

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

  7. period ended2024-12-31
    13F 1,156,322 shares
    Change vs previous 13F -95,136 shares

    0.09% of the 13F portfolio, value $20,177,819.

    13F-HR 0001140361-25-004330 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 599,634 shares
    • GABELLI FUNDS LLC: 556,688 shares

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

  8. period ended2024-09-30
    13F 1,251,458 shares
    Change vs previous 13F not available

    0.06% of the 13F portfolio, value $13,853,640.

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

    • GAMCO INVESTORS, INC. ET AL: 634,770 shares
    • GABELLI FUNDS LLC: 616,688 shares

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