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Boston Trust Walden Corp: MAS position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Boston Trust Walden Corp on MAS, newest first. How the timeline and the estimate are built.

Boston Trust Walden Corp held 5,209,004 MAS shares at 2026-06-30 per its 13F-HR filed 2026-08-04.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 5,209,004 shares
    Change vs previous 13F +3,385 shares

    0.34% of the 13F portfolio, value $423,790,890.

    13F-HR 0001386060-26-000035 filed by Boston Partners
    Filed (acceptance time not in the bulk data set), ingested

    • Boston Partners: 4,606,061 shares
    • Boston Trust Walden Corp: 602,943 shares

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

  2. period ended2026-03-31
    13F 5,205,619 shares
    Change vs previous 13F -1,043,714 shares

    0.29% of the 13F portfolio, value $314,242,005.

    13F-HR 0001386060-26-000017 filed by Boston Partners
    Filed (acceptance time not in the bulk data set), ingested

    • Boston Partners: 4,492,021 shares
    • Boston Trust Walden Corp: 713,598 shares

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

  3. period ended2025-12-31
    13F 6,249,333 shares
    Change vs previous 13F -126,592 shares

    0.36% of the 13F portfolio, value $396,714,562.

    13F-HR 0001386060-26-000014 filed by Boston Partners
    Filed (acceptance time not in the bulk data set), ingested

    • Boston Partners: 5,731,244 shares
    • Boston Trust Walden Corp: 518,089 shares

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

  4. period ended2025-09-30
    13F 6,375,925 shares
    Change vs previous 13F +59,099 shares

    0.4% of the 13F portfolio, value $448,839,972.

    13F-HR 0001386060-25-000020 filed by Boston Partners
    Filed (acceptance time not in the bulk data set), ingested

    • Boston Partners: 5,850,170 shares
    • Boston Trust Walden Corp: 525,755 shares

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

  5. period ended2025-06-30
    13F/A 6,316,826 shares
    Change vs previous 13F +846,239 shares

    0.39% of the 13F portfolio, value $406,664,690.

    13F-HR/A 0001085146-25-004915 filed by Boston Partners
    Filed (acceptance time not in the bulk data set), ingested

    • Boston Partners: 5,791,561 shares
    • Boston Trust Walden Corp: 525,265 shares

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

  6. period ended2025-03-31
    13F 5,470,587 shares
    Change vs previous 13F -2,792,283 shares

    0.39% of the 13F portfolio, value $380,304,361.

    13F-HR 0001085146-25-002987 filed by Boston Partners
    Filed (acceptance time not in the bulk data set), ingested

    • Boston Partners: 4,980,680 shares
    • Boston Trust Walden Corp: 489,907 shares

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

  7. period ended2024-12-31
    13F 8,262,870 shares
    Change vs previous 13F -1,193,050 shares

    0.62% of the 13F portfolio, value $600,530,172.

    13F-HR 0001085146-25-000961 filed by Boston Partners
    Filed (acceptance time not in the bulk data set), ingested

    • Boston Partners: 7,773,134 shares
    • Boston Trust Walden Corp: 489,736 shares

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

  8. period ended2024-09-30
    13F 9,455,920 shares
    Change vs previous 13F not available

    0.8% of the 13F portfolio, value $793,771,203.

    13F-HR 0001085146-24-005518 filed by Boston Partners
    Filed (acceptance time not in the bulk data set), ingested

    • Boston Partners: 8,984,582 shares
    • Boston Trust Walden Corp: 471,338 shares

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