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LOOMIS SAYLES & CO L P: ARM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of LOOMIS SAYLES & CO L P on ARM, newest first. How the timeline and the estimate are built.

LOOMIS SAYLES & CO L P held 785,168 ARM shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 785,168 shares
    Change vs previous 13F -75,094 shares

    0.35% of the 13F portfolio, value $278,397,018.

    13F-HR 0000312348-26-000034 filed by LOOMIS SAYLES & CO 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 860,262 shares
    Change vs previous 13F +30,344 shares

    0.18% of the 13F portfolio, value $130,140,435.

    13F-HR 0000312348-26-000026 filed by LOOMIS SAYLES & CO 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 829,918 shares
    Change vs previous 13F -20,363 shares

    0.11% of the 13F portfolio, value $90,718,337.

    13F-HR 0000312348-26-000014 filed by LOOMIS SAYLES & CO 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 850,281 shares
    Change vs previous 13F +22,141 shares

    0.14% of the 13F portfolio, value $120,306,258.

    13F-HR 0000312348-25-000035 filed by LOOMIS SAYLES & CO 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 828,140 shares
    Change vs previous 13F -16,636 shares

    0.17% of the 13F portfolio, value $133,943,364.

    13F-HR 0000312348-25-000028 filed by LOOMIS SAYLES & CO 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 844,776 shares
    Change vs previous 13F -9,748 shares

    0.13% of the 13F portfolio, value $90,214,000.

    13F-HR 0000312348-25-000021 filed by LOOMIS SAYLES & CO L P
    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 854,524 shares
    Change vs previous 13F -42,176 shares

    0.13% of the 13F portfolio, value $105,414,000.

    13F-HR 0000312348-25-000014 filed by LOOMIS SAYLES & CO L P
    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 896,700 shares
    Change vs previous 13F not available

    0.17% of the 13F portfolio, value $128,237,000.

    13F-HR 0000312348-24-000037 filed by LOOMIS SAYLES & CO L P
    Filed (acceptance time not in the bulk data set), ingested

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