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Rafferty Asset Management, LLC: MRK position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Rafferty Asset Management, LLC on MRK, newest first. How the timeline and the estimate are built.

Rafferty Asset Management, LLC held 273,534 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 273,534 shares
    Change vs previous 13F +80,481 shares

    0.08% of the 13F portfolio, value $35,149,119.

    13F-HR 0001999371-26-017909 filed by Rafferty Asset Management, LLC
    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 193,053 shares
    Change vs previous 13F -76,567 shares

    0.09% of the 13F portfolio, value $23,222,345.

    13F-HR 0001999371-26-010796 filed by Rafferty Asset Management, LLC
    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 269,620 shares
    Change vs previous 13F -10,228 shares

    0.1% of the 13F portfolio, value $28,380,201.

    13F-HR 0001999371-26-003261 filed by Rafferty Asset Management, LLC
    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 279,848 shares
    Change vs previous 13F +11,466 shares

    0.08% of the 13F portfolio, value $23,487,643.

    13F-HR 0001999371-25-017439 filed by Rafferty Asset Management, LLC
    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 268,382 shares
    Change vs previous 13F +30,670 shares

    0.07% of the 13F portfolio, value $21,245,119.

    13F-HR 0001999371-25-011302 filed by Rafferty Asset Management, LLC
    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 237,712 shares
    Change vs previous 13F -52,722 shares

    0.09% of the 13F portfolio, value $21,337,029.

    13F-HR 0001999371-25-006071 filed by Rafferty Asset Management, LLC
    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 290,434 shares
    Change vs previous 13F +29,554 shares

    0.1% of the 13F portfolio, value $28,892,374.

    13F-HR 0001999371-25-001622 filed by Rafferty Asset Management, LLC
    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 260,880 shares
    Change vs previous 13F not available

    0.1% of the 13F portfolio, value $29,625,533.

    13F-HR 0001999371-24-014625 filed by Rafferty Asset Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

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