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DIMENSIONAL FUND ADVISORS LP: ADT position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of DIMENSIONAL FUND ADVISORS LP on ADT, newest first. How the timeline and the estimate are built.

DIMENSIONAL FUND ADVISORS LP held 43,246,525 ADT shares at 2026-06-30 per its 13F-HR filed 2026-08-11, and reported 43,322,385 shares, 6.4%, in a 13G/A filed 2026-10-08.

Estimated current stake: 43,322,385 shares, 6.4% of the class

Estimated from 13G/A of 2026-10-08. As of 2026-09-30, 13G/A 0000354204-26-001054.

Shares are the reporting group's aggregate and may include entities that do not file a 13F.

Percent of portfolio stays on the 13F for 2026-06-30.

  1. event date2026-09-30
    13G/A 43,322,385 shares
    Share basis changed not comparable

    6.4% of the class. Different basis (group aggregate from 13G/A).

    13G/A 0000354204-26-001054 filed by DIMENSIONAL FUND ADVISORS LP
    Accepted , ingested

    A 13D/G states the aggregate of its reporting persons, which may include entities that do not file a 13F.

  2. period ended2026-06-30
    13F 43,246,525 shares
    Change vs previous 13F +3,359,237 shares

    0.05% of the 13F portfolio, value $281,104,453.

    13F-HR 0000354204-26-000866 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2026-03-31
    13F 39,887,288 shares
    Change vs previous 13F +3,529,422 shares

    0.05% of the 13F portfolio, value $262,053,546.

    13F-HR 0000354204-26-000581 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-12-31
    13F 36,357,866 shares
    Change vs previous 13F +2,376,977 shares

    0.06% of the 13F portfolio, value $293,404,718.

    13F-HR 0000354204-26-000347 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-09-30
    13F 33,980,889 shares
    Change vs previous 13F +2,111,701 shares

    0.06% of the 13F portfolio, value $295,980,401.

    13F-HR 0000354204-25-001337 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2025-06-30
    13F 31,869,188 shares
    Change vs previous 13F +5,791,257 shares

    0.06% of the 13F portfolio, value $269,930,897.

    13F-HR 0000354204-25-001097 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2025-03-31
    13F 26,077,931 shares
    Change vs previous 13F +4,624,120 shares

    0.05% of the 13F portfolio, value $212,263,650.

    13F-HR 0000354204-25-000866 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-12-31
    13F 21,453,811 shares
    Change vs previous 13F +5,089,056 shares

    0.04% of the 13F portfolio, value $148,245,779.

    13F-HR 0000354204-25-000528 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

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

  9. period ended2024-09-30
    13F 16,364,755 shares
    Change vs previous 13F not available

    0.03% of the 13F portfolio, value $118,322,113.

    13F-HR 0000354204-24-004773 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

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