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Disclosery

Sienna Gestion: ATO position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Sienna Gestion on ATO, newest first. How the timeline and the estimate are built.

Sienna Gestion held 117,688 ATO 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 117,688 shares
    Change vs previous 13F -9,324 shares

    1.22% of the 13F portfolio, value $20,806,249.

    13F-HR 0000945621-26-001042 filed by Sienna Gestion
    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 127,012 shares
    Change vs previous 13F +70,512 shares

    1.54% of the 13F portfolio, value $23,672,951.

    13F-HR 0000945621-26-000712 filed by Sienna Gestion
    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 56,500 shares
    Change vs previous 13F -11,717 shares

    0.56% of the 13F portfolio, value $9,477,383.

    13F-HR 0000945621-26-000314 filed by Sienna Gestion
    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 68,217 shares
    Change vs previous 13F 0 shares

    0.74% of the 13F portfolio, value $10,620,050.

    13F-HR 0000945621-25-001073 filed by Sienna Gestion
    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 68,217 shares
    Change vs previous 13F +5,618 shares

    0.66% of the 13F portfolio, value $9,598,170.

    13F-HR 0000945621-25-000651 filed by Sienna Gestion
    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 62,599 shares
    Change vs previous 13F -3,321 shares

    0.76% of the 13F portfolio, value $9,406,018.

    13F-HR 0000945621-25-000460 filed by Sienna Gestion
    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 65,920 shares
    Change vs previous 13F 0 shares

    0.62% of the 13F portfolio, value $9,179,348.

    13F-HR 0000945621-25-000148 filed by Sienna Gestion
    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 65,920 shares
    Change vs previous 13F not available

    0.61% of the 13F portfolio, value $9,121,645.

    13F-HR 0000945621-24-000939 filed by Sienna Gestion
    Filed (acceptance time not in the bulk data set), ingested

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