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MARTINGALE ASSET MANAGEMENT L P: DUK position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of MARTINGALE ASSET MANAGEMENT L P on DUK, newest first. How the timeline and the estimate are built.

MARTINGALE ASSET MANAGEMENT L P held 109,156 DUK shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 109,156 shares
    Change vs previous 13F -1,119 shares

    0.33% of the 13F portfolio, value $13,816,967.

    13F-HR 0000936944-26-000006 filed by MARTINGALE ASSET MANAGEMENT L P
    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 110,275 shares
    Change vs previous 13F -31,273 shares

    0.36% of the 13F portfolio, value $14,439,409.

    13F-HR 0000936944-26-000003 filed by MARTINGALE ASSET MANAGEMENT L P
    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 141,548 shares
    Change vs previous 13F +42,426 shares

    0.42% of the 13F portfolio, value $16,590,842.

    13F-HR 0000936944-26-000002 filed by MARTINGALE ASSET MANAGEMENT L P
    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 99,122 shares
    Change vs previous 13F +89,229 shares

    0.31% of the 13F portfolio, value $12,266,348.

    13F-HR 0000936944-25-000010 filed by MARTINGALE ASSET MANAGEMENT L P
    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 9,893 shares
    Change vs previous 13F +2,930 shares

    0.03% of the 13F portfolio, value $1,167,374.

    13F-HR 0000936944-25-000008 filed by MARTINGALE ASSET MANAGEMENT L P
    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 6,963 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $849,278.

    13F-HR 0000936944-25-000005 filed by MARTINGALE ASSET MANAGEMENT L P
    Filed (acceptance time not in the bulk data set), ingested

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