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Disclosery

CITADEL ADVISORS LLC: MRK position timeline

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

CITADEL ADVISORS LLC held 1,933,667 MRK shares at 2026-06-30 per its 13F-HR/A filed 2026-09-02.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F/A 1,933,667 shares
    Change vs previous 13F -1,887,560 shares

    0.14% of the 13F portfolio, value $248,476,210.

    13F-HR/A 0001104659-26-104387 filed by CITADEL ADVISORS LLC
    Accepted , ingested

  2. period ended2026-03-31
    13F 3,821,227 shares
    Change vs previous 13F -3,000,104 shares

    0.33% of the 13F portfolio, value $459,655,396.

    13F-HR 0001104659-26-062477 filed by CITADEL ADVISORS 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 6,821,331 shares
    Change vs previous 13F +5,853,277 shares

    0.49% of the 13F portfolio, value $718,013,301.

    13F-HR 0001104659-26-016408 filed by CITADEL ADVISORS 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 968,054 shares
    Change vs previous 13F +968,054 shares

    0.07% of the 13F portfolio, value $81,248,772.

    13F-HR 0001104659-25-112514 filed by CITADEL ADVISORS 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 0 shares
    Change vs previous 13F -2,048,739 shares

    13F-HR 0001104659-25-078555 filed by CITADEL ADVISORS LLC
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  6. period ended2025-03-31
    13F 2,048,739 shares
    Change vs previous 13F -3,232,971 shares

    0.18% of the 13F portfolio, value $183,894,813.

    13F-HR 0000950123-25-005687 filed by CITADEL ADVISORS 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 5,281,710 shares
    Change vs previous 13F -1,759,979 shares

    0.49% of the 13F portfolio, value $525,424,510.

    13F-HR 0000950123-25-002739 filed by CITADEL ADVISORS 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 7,041,689 shares
    Change vs previous 13F not available

    0.83% of the 13F portfolio, value $799,654,203.

    13F-HR 0000950123-24-011767 filed by CITADEL ADVISORS LLC
    Filed (acceptance time not in the bulk data set), ingested

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