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LONGFELLOW INVESTMENT MANAGEMENT CO LLC: MPLX position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of LONGFELLOW INVESTMENT MANAGEMENT CO LLC on MPLX, newest first. How the timeline and the estimate are built.

LONGFELLOW INVESTMENT MANAGEMENT CO LLC held 579,453 MPLX 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 579,453 shares
    Change vs previous 13F 0 shares

    6.67% of the 13F portfolio, value $32,640,587.

    13F-HR 0001167487-26-000008 filed by LONGFELLOW INVESTMENT MANAGEMENT CO 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 579,453 shares
    Change vs previous 13F -187,076 shares

    6.89% of the 13F portfolio, value $33,069,383.

    13F-HR 0001167487-26-000005 filed by LONGFELLOW INVESTMENT MANAGEMENT CO 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 766,529 shares
    Change vs previous 13F 0 shares

    9.23% of the 13F portfolio, value $40,909,653.

    13F-HR 0001167487-26-000003 filed by LONGFELLOW INVESTMENT MANAGEMENT CO 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 766,529 shares
    Change vs previous 13F 0 shares

    9.08% of the 13F portfolio, value $38,288,124.

    13F-HR 0001167487-25-000007 filed by LONGFELLOW INVESTMENT MANAGEMENT CO 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 766,529 shares
    Change vs previous 13F 0 shares

    9.77% of the 13F portfolio, value $39,483,909.

    13F-HR 0001667731-25-001094 filed by LONGFELLOW INVESTMENT MANAGEMENT CO LLC
    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 766,529 shares
    Change vs previous 13F 0 shares

    10.01% of the 13F portfolio, value $41,024,632.

    13F-HR 0001667731-25-000617 filed by LONGFELLOW INVESTMENT MANAGEMENT CO LLC
    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 766,529 shares
    Change vs previous 13F 0 shares

    9.43% of the 13F portfolio, value $36,686,078.

    13F-HR 0001667731-25-000246 filed by LONGFELLOW INVESTMENT MANAGEMENT CO LLC
    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 766,529 shares
    Change vs previous 13F not available

    8.53% of the 13F portfolio, value $34,079,879.

    13F-HR 0001667731-24-000693 filed by LONGFELLOW INVESTMENT MANAGEMENT CO LLC
    Filed (acceptance time not in the bulk data set), ingested

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