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LOOMIS SAYLES & CO L P: MRK position timeline

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

LOOMIS SAYLES & CO L P held 58,514 MRK 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 58,514 shares
    Change vs previous 13F -16,157 shares

    0.01% of the 13F portfolio, value $7,519,048.

    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 74,671 shares
    Change vs previous 13F -80,639 shares

    0.01% of the 13F portfolio, value $8,982,175.

    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 155,310 shares
    Change vs previous 13F -54,201 shares

    0.02% of the 13F portfolio, value $16,347,930.

    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 209,511 shares
    Change vs previous 13F -22,081 shares

    0.02% of the 13F portfolio, value $17,584,258.

    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 231,592 shares
    Change vs previous 13F +49,210 shares

    0.02% of the 13F portfolio, value $18,332,822.

    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 182,382 shares
    Change vs previous 13F -4,837 shares

    0.02% of the 13F portfolio, value $16,371,000.

    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 187,219 shares
    Change vs previous 13F +55,795 shares

    0.02% of the 13F portfolio, value $18,625,000.

    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 131,424 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $14,924,000.

    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).